Repinning TBI to Speed Density TPI
#201
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Car: '88 Formula, '94 Corvette, '95 Bird
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Re: Repinning TBI to Speed Density TPI
I have a 92' Camaro and my memcal is from a 90' Corvette. AZ TPI said that I have to get the Vette memcal's vats disabled. Is this true? I'm getting ready to do this swap and this is a big speed bump cause they want 150 dollars to disable it for me. I thought because I have a 92 that it would be fine. Am I wrong? Or will I be ok not having it disabled?
-- Joe
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Car: 92' White RS C5 wheels
Engine: 350 TBI
Transmission: 6-Speed
Re: Repinning TBI to Speed Density TPI
I'm not sure. How do I tell? The car came with remote start (aftermarket alarm) so I don't know if it was disabled or not. Is there a way to find out? Or a way that I can disable the prom?
#203
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Re: Repinning TBI to Speed Density TPI
If not, it doesn't.
Anyhow. If you need vats disabled, you need to burn a new prom and you will need a memcal adapter unless your a pro at soldering. For $35, it's best to get he adapter.
-- Joe
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Car: 92' White RS C5 wheels
Engine: 350 TBI
Transmission: 6-Speed
Re: Repinning TBI to Speed Density TPI
Oh then yes I do have VATS. Do I still need an adapter or burning? If so where do I get an adapter from? And does that mean I have to fork over the 150 to get my chip burned?
#205
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Car: '88 Formula, '94 Corvette, '95 Bird
Engine: LC9, LT1
Transmission: TKX, 4L60E
Axle/Gears: 3.42, 3.23
Re: Repinning TBI to Speed Density TPI
-- Joe
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Re: Repinning TBI to Speed Density TPI
Great thread, I plan to swap over to TPI soon. I picked up a 01227730 Prom from a 1990 Camaro Iroc 305 LB9 but just pocketed the prom/memcal since they want $40 for the whole box and thats a bit much for me right now since its not 100% that a friend will get another tpi car at his yard soon. He would let the whole intake with injectors go for under $50.
I noticed that some got the box from other vehicles, what other cars ecm box will work? Any complete list? Maybe my friends yard has the box, would the connectors be the same? Or should I go grab the connectors off the 1990 Iroc.
Another Q is basically about the plenum, I noticed on SD plenums it has a bracket, Do I need to get a SD plenum or is it just basically a regular plenum with a bracket friendly hole?
I might go get the injector connectors this weekend if they are of use later on.
I noticed that some got the box from other vehicles, what other cars ecm box will work? Any complete list? Maybe my friends yard has the box, would the connectors be the same? Or should I go grab the connectors off the 1990 Iroc.
Another Q is basically about the plenum, I noticed on SD plenums it has a bracket, Do I need to get a SD plenum or is it just basically a regular plenum with a bracket friendly hole?
I might go get the injector connectors this weekend if they are of use later on.
#208
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Re: Repinning TBI to Speed Density TPI
Aight I am able to pick up a 88 Tpi setup minus Runners for $65. Its going into a L05 350, I have the ecm covered and wiring, I figured the L05 and L03 are the same intake wise since the Performer TBI was interchangeable with the old L03.
Any problems here or should I go for it? Its a 9 injector tpi setup from a 88 like I said.
A quick answer would be great, you guys have very helpful with all the info found in this thread.
Any problems here or should I go for it? Its a 9 injector tpi setup from a 88 like I said.
A quick answer would be great, you guys have very helpful with all the info found in this thread.
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Car: 1988 Pontiac trans am
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Re: Repinning TBI to Speed Density TPI
i just bought a 1990 SD LB9 yesterday for $300 with serppentine acc. and all , new alt. and dizzy cap . PO said he removed engine @ 100K miles , if my 88 LO3 does not have vats and the LB9 was from a vats car would this create any issues ?
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Car: 91 formula ws6
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Re: Repinning TBI to Speed Density TPI
yea it wont fire the injectors. the vats sends a ?30hz ground signal to the computer to tell it to fire the injectors. has to be disabled if it has it.
edit: didnt realize how old this thread was....
edit: didnt realize how old this thread was....
#211
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Re: Repinning TBI to Speed Density TPI
Anyone ever notice the '165 and '746 is almost identical pinouts? Only a few wires need moving/hooking into the ESC to convert to MAF.
-- Joe
-- Joe
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Car: 92' White RS C5 wheels
Engine: 350 TBI
Transmission: 6-Speed
Re: Repinning TBI to Speed Density TPI
I probably just missed it in here but can anyone tell me what other GM cars the '730 computer came in? I can only find the older v6 camaro's around here. I'm not in a good 3rd gen parts area. I tried some of the 3800 series buicks, but it's a different number and totally different look. They were mid 90's cars. Thanks Guys!
#214
Re: Repinning TBI to Speed Density TPI
alright i hate to say this but i am confused, i know that the pins go with a letter assigned left to right, top left is a1 and top right is a12 etc etc but on the diagram posted its showing like BC and letter combos... what am i missing here????
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Car: '88 Formula, '94 Corvette, '95 Bird
Engine: LC9, LT1
Transmission: TKX, 4L60E
Axle/Gears: 3.42, 3.23
Re: Repinning TBI to Speed Density TPI
-- Joe
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Car: 97 SLP SS, 91 RS, 91 GTA, 92 JY FF
Engine: LT1, VRE 383 LT1, L98, LB9
Transmission: 4L60E, Astro T-5, A4, A4
Axle/Gears: 3.42, 3.70 9Bolt, 3.23, 2.73
Re: Repinning TBI to Speed Density TPI
Step 9: 1227730 conversion
Splice the right bank injector wires to 4 injector plugs. All the grounds go together to one wire, all the positives go together to the other wire. Now, splice the left bank in place to the left 4 injector plugs. If using TPI plugs, the green plugs go on right side, the red plugs go on left side.
Remove the ESC module. Cut the connector off, and splice wires C and E together. Tape up, and hide someplace neat.
Connect MAT, TPS, CTS, and IAC. Extend wires if needed.
Step 10: Repin
Now, repin ECM connector using following table:
Splice the right bank injector wires to 4 injector plugs. All the grounds go together to one wire, all the positives go together to the other wire. Now, splice the left bank in place to the left 4 injector plugs. If using TPI plugs, the green plugs go on right side, the red plugs go on left side.
Remove the ESC module. Cut the connector off, and splice wires C and E together. Tape up, and hide someplace neat.
Connect MAT, TPS, CTS, and IAC. Extend wires if needed.
Step 10: Repin
Now, repin ECM connector using following table:
#218
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Re: Repinning TBI to Speed Density TPI
TPI_327_77_MARO did this on one of his vehicles just recently. He wrote a pinout chart for it. Perhaps a PM to him and he'd share it in this thread.
-- Joe
-- Joe
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Axle/Gears: 3.42, 3.70 9Bolt, 3.23, 2.73
Re: Repinning TBI to Speed Density TPI
I appreciate your help, however i could not find that member anywhere on here.
#220
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Re: Repinning TBI to Speed Density TPI
#221
Re: Repinning TBI to Speed Density TPI
hello im new here i was sent over here from 67-72chevytrucks.com i want to put a tpi on my 90 chevy suburban and i have bought a CHEVY 370HP 430FT LBS 1987 - 95 383 STROKER ENGINE here are the specs
· Premium seasoned 4-bolt main block
· GM 350/3.750 con rods with ARP rod bolts
· NEW Scat steel 383 crankshaft
· Speed Pro hypereutectic flat-top pistons 9:1 comp ratio
· Plasma moly piston rings
· Speed Pro camshaft & lifters
.425/.440- 206/212- 112
· Performance gasket set
· Melling high volume oil pump
· Clevite/Mahle race/performance rod, main & cam bearings
· Cloyes double roller timing set
· Brass freeze plugs
· CHS cast iron cylinder heads
· 2.02 intake/1.60 exhaust stainless steel swirl polished valves
· Comp valve springs .530 lift, new guides & hardened seats
· Head bolts, rocker arms & push rods
· GM harmonic balancer & flex plate
Engines are fully balanced
· Blocks are bored & honed using a torque plate
· Blocks are decked parallel to the main line
· Connecting rods are re-sized
· Main line is re-machined
my main question is do i use the second pin out you have on the first page and do i use the ecm i already have or the one you recommend and also i have bought slp runners and a 58mm throttle body should i run bigger injectors and intake i plan on gasket matching and port everything? and should i run a map or maf tpi? i no im asking a lot but i cant get straight answer every one i ask keeps telling me one is better than the other. and i want to keep it emissions legal in utah.
· Premium seasoned 4-bolt main block
· GM 350/3.750 con rods with ARP rod bolts
· NEW Scat steel 383 crankshaft
· Speed Pro hypereutectic flat-top pistons 9:1 comp ratio
· Plasma moly piston rings
· Speed Pro camshaft & lifters
.425/.440- 206/212- 112
· Performance gasket set
· Melling high volume oil pump
· Clevite/Mahle race/performance rod, main & cam bearings
· Cloyes double roller timing set
· Brass freeze plugs
· CHS cast iron cylinder heads
· 2.02 intake/1.60 exhaust stainless steel swirl polished valves
· Comp valve springs .530 lift, new guides & hardened seats
· Head bolts, rocker arms & push rods
· GM harmonic balancer & flex plate
Engines are fully balanced
· Blocks are bored & honed using a torque plate
· Blocks are decked parallel to the main line
· Connecting rods are re-sized
· Main line is re-machined
my main question is do i use the second pin out you have on the first page and do i use the ecm i already have or the one you recommend and also i have bought slp runners and a 58mm throttle body should i run bigger injectors and intake i plan on gasket matching and port everything? and should i run a map or maf tpi? i no im asking a lot but i cant get straight answer every one i ask keeps telling me one is better than the other. and i want to keep it emissions legal in utah.
#222
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Re: Repinning TBI to Speed Density TPI
hello im new here i was sent over here from 67-72chevytrucks.com i want to put a tpi on my 90 chevy suburban and i have bought a CHEVY 370HP 430FT LBS 1987 - 95 383 STROKER ENGINE here are the specs
my main question is do i use the second pin out you have on the first page and do i use the ecm i already have or the one you recommend and also i have bought slp runners and a 58mm throttle body should i run bigger injectors and intake i plan on gasket matching and port everything? and should i run a map or maf tpi? i no im asking a lot but i cant get straight answer every one i ask keeps telling me one is better than the other. and i want to keep it emissions legal in utah.
my main question is do i use the second pin out you have on the first page and do i use the ecm i already have or the one you recommend and also i have bought slp runners and a 58mm throttle body should i run bigger injectors and intake i plan on gasket matching and port everything? and should i run a map or maf tpi? i no im asking a lot but i cant get straight answer every one i ask keeps telling me one is better than the other. and i want to keep it emissions legal in utah.
Another thing you can look into as well is an EBL, if you have not already picked up a '730 ECM and memcal. By the time you pick up an ostrich, a ALDL adapter, ecm, and memcal you might be within $50 of just buying an EBL.
-- Joe
#223
Re: Repinning TBI to Speed Density TPI
ok so is the EBL a plug and play and then i can adjust everything as i go and what one would you recommend. and from what im seeing i would have to straight wire it to the ecm instead of changing the connectors. i really want something that i dont have to play with but if this is what i have to do ill do it. and from what i learned 25 or 30 pound injectors are what i need? and im sure ill need a fuel pressure regulator also right.
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Car: 1989 Formula Firebird
Engine: Swapped 350 TPI speed density
Transmission: 700R4
Axle/Gears: 2.73 (soon to be 3.42)
Re: Repinning TBI to Speed Density TPI
Step 9: 1227730 conversion
Splice the right bank injector wires to 4 injector plugs. All the grounds go together to one wire, all the positives go together to the other wire. Now, splice the left bank in place to the left 4 injector plugs. If using TPI plugs, the green plugs go on right side, the red plugs go on left side.
Remove the ESC module. Cut the connector off, and splice wires C and E together. Tape up, and hide someplace neat.
Connect MAT, TPS, CTS, and IAC. Extend wires if needed.
Step 10: Repin
Now, repin ECM connector using following table:
Splice the right bank injector wires to 4 injector plugs. All the grounds go together to one wire, all the positives go together to the other wire. Now, splice the left bank in place to the left 4 injector plugs. If using TPI plugs, the green plugs go on right side, the red plugs go on left side.
Remove the ESC module. Cut the connector off, and splice wires C and E together. Tape up, and hide someplace neat.
Connect MAT, TPS, CTS, and IAC. Extend wires if needed.
Step 10: Repin
Now, repin ECM connector using following table:
(Car is a 89 Formula 5.0 TBI that we're putting a 91 5.7 TPI into it. I have the entire harness and the ECM. Both were 700R4 trans cars.)
EDIT: So, we guessed that the first letter was to be ignored and matched everything up to a good schematic. I'm still having trouble figuring out some of the wires that don't exist from one harness or the other. What do I do with them?
Last edited by 1991_RS; 07-01-2012 at 06:52 PM.
#225
Re: Repinning TBI to Speed Density TPI
OK, so I'm staring at my 730 ECM plug & computer from a 1991 Z28 thinking I'm an idiot because I can't find any designations "GExx" or "BDx" ~ all mine are labeled with a single letter A, B, C, D, E or F. No double letters at all. Is this something strange I'm dealing with? PLEEEASE help me because I'm running out of summer to enjoy my car!
(Car is a 89 Formula 5.0 TBI that we're putting a 91 5.7 TPI into it. I have the entire harness and the ECM. Both were 700R4 trans cars.)
EDIT: So, we guessed that the first letter was to be ignored and matched everything up to a good schematic. I'm still having trouble figuring out some of the wires that don't exist from one harness or the other. What do I do with them?
(Car is a 89 Formula 5.0 TBI that we're putting a 91 5.7 TPI into it. I have the entire harness and the ECM. Both were 700R4 trans cars.)
EDIT: So, we guessed that the first letter was to be ignored and matched everything up to a good schematic. I'm still having trouble figuring out some of the wires that don't exist from one harness or the other. What do I do with them?
#226
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Re: Repinning TBI to Speed Density TPI
That was ny question with this originally, is he correct in ignoring the first letter? I'm doing a similar thing with my car except I'm using a new speed density harness rather than my old tbi one, so the repinning should be the same on the car side if this could be cleared up that would be helpful id rather not take a stab in the dark on this
http://www.spudgames.com/bstuff/ecmp1.jpg
-- Joe
#227
Re: Repinning TBI to Speed Density TPI
Yeah ignore the first letter. I labeled them that way because that is how they are labeled in the FSM.
http://www.spudgames.com/bstuff/ecmp1.jpg
-- Joe
http://www.spudgames.com/bstuff/ecmp1.jpg
-- Joe
#228
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Car: 1989 Formula Firebird
Engine: Swapped 350 TPI speed density
Transmission: 700R4
Axle/Gears: 2.73 (soon to be 3.42)
Re: Repinning TBI to Speed Density TPI
Wow, I feel dumb lol now for my final potentially stupid question ; if I am doing a speed density swap using a speed density harness can I follow this table still to make my 89 interior harness work with the speed density harness? I feel the answer is yes but i want to be sure on it. And as the previous poster asked what do you do with the wires that are left over? I know a few switch over, do I just isolate and heat shrink any left overs?
Also, I've been posting on another re-pin post - how do I deal with the clear-white connector under the passenger side dash (the one that's just off the ECM)? They're labeled A-R with a few letters omitted.
#229
Re: Repinning TBI to Speed Density TPI
C207 connector I believe, I've been using diagrams on Austinthirdgen.org and decoding the misleading factory labels they put on he wires, I know 2 are for the aldl and they don't change position between 89-92 and same with vats, stays the same so if all else fails you can pull codes and dosable the starter lol I've gotten the 92 one done but I haven't done the 89, Lou helped me a lot with figuring out the 92 and since it seems pocket is MIA again from other threads its up to us to figure it out with some helpful info from others lol
#230
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Transmission: TKX, 4L60E
Axle/Gears: 3.42, 3.23
Re: Repinning TBI to Speed Density TPI
Wow, I feel dumb lol now for my final potentially stupid question ; if I am doing a speed density swap using a speed density harness can I follow this table still to make my 89 interior harness work with the speed density harness? I feel the answer is yes but i want to be sure on it. And as the previous poster asked what do you do with the wires that are left over? I know a few switch over, do I just isolate and heat shrink any left overs?
It's been a while since I've swapped a complete harness. I'd have to look at one of mine for reference.
-- Joe
#231
Re: Repinning TBI to Speed Density TPI
I'm attempting to repin my 89 tbi interior harness to accept a 92 speed density tpi engine harness so essentially its the same thing without splicing under the hood for the injectors and such right? My problem is I don't start a project like this until I'm absolutely sure I have proper reference materials. It seems 1991_rs is doing the same, I know it has been done countless times but nobody has bothered to do a write up which after I'm done I would like to submit as a tech article for others trying to do the same in the future
Last edited by BluFBdy; 07-05-2012 at 01:36 PM.
#232
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Car: 1989 Formula Firebird
Engine: Swapped 350 TPI speed density
Transmission: 700R4
Axle/Gears: 2.73 (soon to be 3.42)
Re: Repinning TBI to Speed Density TPI
I'm attempting to repin my 89 tbi interior harness to accept a 92 speed density tpi engine harness so essentially its the same thing without splicing under the hood for the injectors and such right? My problem is I don't start a project like this until I'm absolutely sure I have proper reference materials. It seems 1991_rs is doing the same, I know it has been done countless times but nobody has bothered to do a write up which after I'm done I would like to submit as a tech article for others trying to do the same in the future
From what I see on the schematics, the TPI is a batch-fired system - meaning that it fires all the injectors on one side together (not like the sequentially fired ones of today that fire injectors individually). This is what was confusing me about using my old TBI harness. I couldn't understand how 2 injector circuits would work with 8 injectors. NOW, I get it - I just wish I could have figured that out earlier.
Anyway, I think, based on what I've read on TGO and in the diagrams, if you re-pin the TBI harness to work with your ECM and add the pigtails for the 8 injectors (that should be your only major splice to the harness), you're probably pretty close to turn-key ready.
I'm giving it a little more time due to my situation before I give in and buy a new (used) TBI harness. Since I cut my old one up to make the TPI one "work" (yeah, THAT went well...), I don't have that one to fall back on.
Let me know how it goes. Post any miraculous revelations you come across, please!
#235
Re: Repinning TBI to Speed Density TPI
I just grabbed 8 injectors connectors at the wreckers for EV1 injectors. Question is...what color wire is negative on the TBI injector harness, what color is positive, and which color wires do they go to on the injectors?
#238
Re: Repinning TBI to Speed Density TPI
I did look at post 2, but it doesn't give you wire color. I'm not swapping out computers or repinning, just putting in the injectors on the TBI harness. There is a guy in town here that makes this swap work well. The injectors I grabbed have a brown wire, and a brown/black wire. My guess is brown/black should be ground.
#245
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Car: 89 Iroc, saved from scrapyard
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Re: Repinning TBI to Speed Density TPI
I hate to bring this up again but I don't understand what the above post means. I have a blue,red,green, and white wire from my TBI harness. I'm sure white and green go to one side and blue red go to the other side. Question is which side does each set go to? I think from reading original ( post#2 I think) it says something about positive/ground doesn't matter but I would think the right side/left side matters. I'm not very good at schematics. Could someone give me a"dummy" explanation?
Also, since I bypassed and deleted the ESC by connecting terminals C and E, now the 4 prong plug that went to the TBI dizzy is useless and I just adapt the red and white wired coil plug to fit my TPI/HEI/internal coil dizzy right?
Last edited by gbettner; 06-24-2013 at 08:54 PM.
#246
Re: Repinning TBI to Speed Density TPI
The white and red are fused hot wires (tbi), The light blue goes to (c11) is bank 1 ground to the ecm. The light green (c12 ) is bank 2 ground to the ecm.
I listed the pins for the 730
I listed the pins for the 730
Last edited by Tuned Performance; 06-24-2013 at 09:04 PM.
#247
Re: Repinning TBI to Speed Density TPI
The Tpi injectors on the on each bank all four wires connect. cylinder 1,3,5,7 The dark blue wires splice together and connect to the light blue wire of the tbi harness. Cylinders 2,4,6,8
the dark green wires on the tpi injectors all connect and hook to the tbi harness dark green wire.
The white wire of the tbi will hook to the pink wires on one injector band . The red wire from the tbi will go to the other bank.
The flat 4 connecter will need to be changed for the coil in cap.
a= white
b=purple/white
c=tan/white
d=black/red
the pink and white wire coming from you harness that use to go to the coil will goto the side of the hei. The pink is accessory power. The white wire goes next to it tach.
the dark green wires on the tpi injectors all connect and hook to the tbi harness dark green wire.
The white wire of the tbi will hook to the pink wires on one injector band . The red wire from the tbi will go to the other bank.
The flat 4 connecter will need to be changed for the coil in cap.
a= white
b=purple/white
c=tan/white
d=black/red
the pink and white wire coming from you harness that use to go to the coil will goto the side of the hei. The pink is accessory power. The white wire goes next to it tach.
#248
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iTrader: (2)
Join Date: Mar 2013
Location: Close to Boggstown Indiana ( out in the middle of a corn field)
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Car: 89 Iroc, saved from scrapyard
Engine: 350 vortec w/stealth ram
Transmission: 85 corvette 700r4
Axle/Gears: 3.73 posi
Re: Repinning TBI to Speed Density TPI
WOW! Thanks man! That was VERY helpful. I owe you one.
The Tpi injectors on the on each bank all four wires connect. cylinder 1,3,5,7 The dark blue wires splice together and connect to the light blue wire of the tbi harness. Cylinders 2,4,6,8
the dark green wires on the tpi injectors all connect and hook to the tbi harness dark green wire.
The white wire of the tbi will hook to the pink wires on one injector band . The red wire from the tbi will go to the other bank.
The flat 4 connecter will need to be changed for the coil in cap.
a= white
b=purple/white
c=tan/white
d=black/red
the pink and white wire coming from you harness that use to go to the coil will goto the side of the hei. The pink is accessory power. The white wire goes next to it tach.
the dark green wires on the tpi injectors all connect and hook to the tbi harness dark green wire.
The white wire of the tbi will hook to the pink wires on one injector band . The red wire from the tbi will go to the other bank.
The flat 4 connecter will need to be changed for the coil in cap.
a= white
b=purple/white
c=tan/white
d=black/red
the pink and white wire coming from you harness that use to go to the coil will goto the side of the hei. The pink is accessory power. The white wire goes next to it tach.
#250
Member
iTrader: (2)
Join Date: Mar 2013
Location: Close to Boggstown Indiana ( out in the middle of a corn field)
Posts: 260
Likes: 0
Received 1 Like
on
1 Post
Car: 89 Iroc, saved from scrapyard
Engine: 350 vortec w/stealth ram
Transmission: 85 corvette 700r4
Axle/Gears: 3.73 posi
Re: Repinning TBI to Speed Density TPI
I have the old plug for the old dizzy/external coil ( that I'll tape up since not used anymore) with the wire colors of the flat 4 connector you took the picture of but I haven't located a connector like what you show in your pic yet. I'll look some more when I get home from work today.