L05 383 STROKER plus vortec heads & summit CAM
#551
Re: L05 383 STROKER plus vortec heads & summit CAM
woot woot, its completed on the lift! ![blah blah](https://www.thirdgen.org/forums/images/smilies/blahblah.gif)
![](http://i193.photobucket.com/albums/z54/Tbi-MAX/DSC02507.jpg)
now, Oldred just threw a good idea into my head! which Alvin was trying to tell me all along. But Oldred said for me to put back in the stock 61# injectors and run them at a very high psi, to feed my combo, and the spray pattern will be even finer of a mist, to help the TBI atomize the mixture better. leading into better mpg as well... i thought this was just great.
now instead of the other regulator i was planing, i am just going to order a import unit so i can regulate my psi anywhere over 20psi! and get a really misty spray... so once i start logging and tuning, i can work even better on my mpg tune. its just like the BBC injectors dont spray very finely.
so im going to re-install the SBC injectors, into the BBC throttle body, order a import regulator, and go from there with the tuning...
now can someone calculate how much psi will it take to feed 350 or so hp and say 450# of tq with 61# stock suv injectors?
also why is it not discussed or said, its better to run smaller injectors at a higher psi?
![blah blah](https://www.thirdgen.org/forums/images/smilies/blahblah.gif)
![](http://i193.photobucket.com/albums/z54/Tbi-MAX/DSC02507.jpg)
now, Oldred just threw a good idea into my head! which Alvin was trying to tell me all along. But Oldred said for me to put back in the stock 61# injectors and run them at a very high psi, to feed my combo, and the spray pattern will be even finer of a mist, to help the TBI atomize the mixture better. leading into better mpg as well... i thought this was just great.
now instead of the other regulator i was planing, i am just going to order a import unit so i can regulate my psi anywhere over 20psi! and get a really misty spray... so once i start logging and tuning, i can work even better on my mpg tune. its just like the BBC injectors dont spray very finely.
so im going to re-install the SBC injectors, into the BBC throttle body, order a import regulator, and go from there with the tuning...
now can someone calculate how much psi will it take to feed 350 or so hp and say 450# of tq with 61# stock suv injectors?
also why is it not discussed or said, its better to run smaller injectors at a higher psi?
#553
Re: L05 383 STROKER plus vortec heads & summit CAM
does all of this sound correct? im going to take the spring out the BBC regulator, install the 61#s and get the after market import ***** regulator.
#555
Re: L05 383 STROKER plus vortec heads & summit CAM
what should the duty cycle be set at then? in the excel document? if i need more fuel, cant i just turn the psi up? the import regulators reg from 20psi all the way up to 50psi... i think oldred is running near 40 psi on his 350ci. and he has set his reg up to 50 psi b4 i read. so will i still need the BBC injectors?
#556
Re: L05 383 STROKER plus vortec heads & summit CAM
alright got the VAFPR ordered, it will be here this week. Im going to use the SBC injectors after talking with Oldred, 91chev and the other guys on FSC. Also I didnt realize Fast305 was using 46# injectors on his 500hp beast he built a few mnths back, at like 60 psi...
here is the VAFPR i will be runing the 61# with:
here is the VAFPR i will be runing the 61# with:
![](http://trendgears.com/ebay/Accessories/FPR-CF.jpg)
#557
Re: L05 383 STROKER plus vortec heads & summit CAM
Try the smaller injectors. Just watch the duty cycle. DC should be under 90% if I recall. It is not a setting in bin. It is a reading in your datalog (TP-RT). 100% means you are a max capacity of the inj. If so you increase FP or go larger inj. Thought TBI injectors can be run as high as 30 lbs? Maybe Fast355 ran them higher. Not sure.
#558
Re: L05 383 STROKER plus vortec heads & summit CAM
Try the smaller injectors. Just watch the duty cycle. DC should be under 90% if I recall. It is not a setting in bin. It is a reading in your datalog (TP-RT). 100% means you are a max capacity of the inj. If so you increase FP or go larger inj. Thought TBI injectors can be run as high as 30 lbs? Maybe Fast355 ran them higher. Not sure.
As long as you have the pump to supply it, and external reg.. it does whatever the pump is willing to give.. the regulator i got say 20-140 psi on the gauge..
Rbob has tested the injectors up to 60psi himself.. and the sprayed perfectly fine he said.. and alot of people are runing both SBC & BBC injectors at those psis daily ranging from 40-50psi.. but the 61# is the injec of choice. same injectors ill be using, that came stock with my truck.
Oldred runs about 50psi WOT and 30psi @ idle...
i got the 61# injectors installed back in the truck today.. surpiseingly the truck cranks up quicker than ever with just the key! no more foot is needed at all... at the same psi as the BBC i managed to get a small lean pop around 15-1600rpm, so i shut it down.. took the reg off, and turned that up to MAX psi possible on the stock reg and BBC spring. So now the stock tbi regulator is MAXED out with the walbaro 255 in the tank... the lean pop was gone! but i notice i had to open the TB blades slow as the air gush is too much without the tune. so it will still lean pop, but no where as easily... i would guestimate its around 16-17psi.. (too little)
no more black water is coming out the exhaust and it doesnt smell rich anymore. but when i get the VAFPR installed, i will set it to the calculated psi... and start to tune from there.. i cant wait.. its been way over due. and all of this is starting to make perfect sense to me.
i entered DC as 88% BSFC as 0.45 with a calculated pressure of 29psi. I should support 356hp!
so when i get the stuff in, and bypass the stock regulator by removing the spring, and putting it back together.. cutting the return line, and installing the VAFPR in series. I will set it @ 29psi to start with..
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Re: L05 383 STROKER plus vortec heads & summit CAM
looks great, sounds good, glad the tuning is working out for ya! I can't help but notice you zoomed in on an open vacuum port on the TBI though, that's a vacuum leak and should be blocked off.
#562
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Car: 77 K20 80 K2500 93 C2500 94 K1500
Engine: 350 350 454 350
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Re: L05 383 STROKER plus vortec heads & summit CAM
406 in the works, pretty sure he told me he sold the 383
#566
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Re: L05 383 STROKER plus vortec heads & summit CAM
Really? Wow...I am surprised by that...come on Max...we need an update I guess! Why you trying to surprise us with a 406?
~
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Re: L05 383 STROKER plus vortec heads & summit CAM
Hey Fast
Which heads are you planing for your 406??? Vortec or something a bit bigger (and meaner)???? This is a good thread as I'm basically about to repeat 383TBI build (vortec heads and K1012 or 1013 cam equivalent).
//RF
Which heads are you planing for your 406??? Vortec or something a bit bigger (and meaner)???? This is a good thread as I'm basically about to repeat 383TBI build (vortec heads and K1012 or 1013 cam equivalent).
//RF
#569
Re: L05 383 STROKER plus vortec heads & summit CAM
JE forged pistons
6" NASCAR rods (out the back door)
double roller bottom end
HYDRALLIC roller lifters RETRO FIT
LUNATI "marine" cam... EXPECT 500HP & 520# tq b4 4000 rpms
AIR FLOW RESEARCH HEADS 190! 72 i belive
1.6 roller rockers... (i cant remember but my lift is like .57/.58 in that range) ill fix this later
compression is about 10.1 I plan on runing 93 as always.
its just going to be a TQ MONSTER... the burb should more like a bat out of hell with this new tq numbers.
again, Im going to TUNED PORT INJECTION.... ditched the TBI for about 500$ installed. got TPI for under 300$ loaded... budget is doing good... so far I have under 2000$ into all of this... as Ive gotten quality used parts, and brand new essential parts. Used parts are: RODS, LIFTERS, HEADS, PISTONS. they have been to the machine shop and checked and polished NEW! everything else is NEW from summit.
Im going to post some videos of the OLD 383 in a few momments.. then you guys can HEAR and get a GRASP of how it ran.
Last edited by Tbi-MAX; 03-20-2009 at 06:03 PM.
#570
Re: L05 383 STROKER plus vortec heads & summit CAM
okay here is 1 of my favs
![](http://i193.photobucket.com/albums/z54/Tbi-MAX/OLD/th_drumerboy.jpg)
ok heres another... still this was not nailed yet on the tune. part throttle
![](http://i193.photobucket.com/albums/z54/Tbi-MAX/OLD/th_almost-lost.jpg)
listen to her GROWL
![](http://i193.photobucket.com/albums/z54/Tbi-MAX/OLD/th_turnout-letoff.jpg)
people seem to like this one... (excuse the abs light is on) lol
![](http://i193.photobucket.com/albums/z54/Tbi-MAX/OLD/th_burnouts373.jpg)
1st startup after intake swap single plane HIGH rise.. BBC TBI.. 90# injs, yes i know its has a vaccum leak on the TBI nipple..
![](http://i193.photobucket.com/albums/z54/Tbi-MAX/OLD/th_highrisestartup.jpg)
![](http://i193.photobucket.com/albums/z54/Tbi-MAX/OLD/th_drumerboy.jpg)
ok heres another... still this was not nailed yet on the tune. part throttle
![](http://i193.photobucket.com/albums/z54/Tbi-MAX/OLD/th_almost-lost.jpg)
listen to her GROWL
![](http://i193.photobucket.com/albums/z54/Tbi-MAX/OLD/th_turnout-letoff.jpg)
people seem to like this one... (excuse the abs light is on) lol
![](http://i193.photobucket.com/albums/z54/Tbi-MAX/OLD/th_burnouts373.jpg)
1st startup after intake swap single plane HIGH rise.. BBC TBI.. 90# injs, yes i know its has a vaccum leak on the TBI nipple..
![](http://i193.photobucket.com/albums/z54/Tbi-MAX/OLD/th_highrisestartup.jpg)
Last edited by Tbi-MAX; 03-19-2009 at 08:47 PM.
#571
Re: L05 383 STROKER plus vortec heads & summit CAM
here is the rubber i burn now...
![](http://i193.photobucket.com/albums/z54/Tbi-MAX/OLD/DSC03313.jpg)
little lesson on turning radius... my burb can bust a Uwee quick lets say... that modd was fun
![](http://i193.photobucket.com/albums/z54/Tbi-MAX/OLD/DSC03427.jpg)
she is getting painted ALL black and limo tint by summer..
![](http://i193.photobucket.com/albums/z54/Tbi-MAX/OLD/DSC03437.jpg)
would u think a 383 or wait.. 408?
![](http://i193.photobucket.com/albums/z54/Tbi-MAX/OLD/DSC03313.jpg)
little lesson on turning radius... my burb can bust a Uwee quick lets say... that modd was fun
![](http://i193.photobucket.com/albums/z54/Tbi-MAX/OLD/DSC03427.jpg)
she is getting painted ALL black and limo tint by summer..
![](http://i193.photobucket.com/albums/z54/Tbi-MAX/OLD/DSC03437.jpg)
would u think a 383 or wait.. 408?
![](http://i193.photobucket.com/albums/z54/Tbi-MAX/OLD/DSC03397.jpg)
#573
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Re: L05 383 STROKER plus vortec heads & summit CAM
Hey Brent your ride looks like a lot of fun! Enjoy the torque of that tpi, talk to ya 1hotroc (Mike).
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Re: L05 383 STROKER plus vortec heads & summit CAM
Don't forget to put the rest of the lug nuts on. Why stop at a 406 when they can be stroked to a 434? A balanced, forged rotating assembly from www.competitionproducts.com can get you there fairly priced.
Chris
Chris
#575
Re: L05 383 STROKER plus vortec heads & summit CAM
thanks Mike!
hey Chris, those pics where just after i put the tires on... the truck looks alot different actually, you would be surprised. but its getting a new color shortly. I just had these parts for a steal. i had the exact same set of slightly used JE forged pistons for the 408 block i had purchased. I just couldnt turn down the price on them. basically a give away. so that way I saved like 800$ just on some "custom 434" pistons with the short skirts. As well as kicking 550+$ on the 4" crank. I simply went with a summit scat for 250$ so I wouldnt have to custom the pistons. Trust me I was itching to do it so bad. but things came up, moved, and had to put cash elsewhere.
however I have plans to SC this very same 408 in the future couple of months. while runing a TPI intake on it, It should put the TQ numbers about 650-700 ish Im hoping.![Smilie](https://www.thirdgen.org/forums/images/smilies/smile.gif)
on the 383, I think the best mods, I actually could feel were, the: BBC TBI! the 90# injs were a charm as well, I really felt the long tube headers. I plan on doing a electric fan swap on the new engine as well. every little for mpg. but with more tq than my last engine, it really saves mpg, barely having to hit the gas pedal and all. 20% throttle, keeps you hanging with traffic.
hey Chris, those pics where just after i put the tires on... the truck looks alot different actually, you would be surprised. but its getting a new color shortly. I just had these parts for a steal. i had the exact same set of slightly used JE forged pistons for the 408 block i had purchased. I just couldnt turn down the price on them. basically a give away. so that way I saved like 800$ just on some "custom 434" pistons with the short skirts. As well as kicking 550+$ on the 4" crank. I simply went with a summit scat for 250$ so I wouldnt have to custom the pistons. Trust me I was itching to do it so bad. but things came up, moved, and had to put cash elsewhere.
however I have plans to SC this very same 408 in the future couple of months. while runing a TPI intake on it, It should put the TQ numbers about 650-700 ish Im hoping.
![Smilie](https://www.thirdgen.org/forums/images/smilies/smile.gif)
on the 383, I think the best mods, I actually could feel were, the: BBC TBI! the 90# injs were a charm as well, I really felt the long tube headers. I plan on doing a electric fan swap on the new engine as well. every little for mpg. but with more tq than my last engine, it really saves mpg, barely having to hit the gas pedal and all. 20% throttle, keeps you hanging with traffic.
Last edited by Tbi-MAX; 03-28-2009 at 11:29 AM.
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