landon360

iTrader: (1)

i recently put a 350 in my 86(Which used to be a 305) TPI and im using the old computer from the 305 but the guy i bought the car put the stupid hypertech chip in it thats supposed to increase horse power but doesnt do anything but use more fuel and thats why im wanting to change the computer and get rid of the chip. and was wondering if this would work in my car ?

http://www.partsgeek.com/gbproducts/...FQmFnQodfnsAjA

Tuned Performance

iTrader: (92)

The link you posted is to the same ecm you already have . The 1227165 was used on tpi maf 86-89. The calibration memcal needs to be replaced or reprogramed. If you want to tune it w
Yourself with a flashed based system look into dynamic efi ebl p4.

hrspwr

iTrader: (3)

+1. The ecm is the same between the 305 and 350. The difference is in the Memcal/programming used by the ecm.

carattini

I have an Original MemCal for the 305

landon360

iTrader: (1)

ok i need to buy a new one because the hypertech chip is what i want rid of, ive heard of it messing with gas mileage and mine is just getting worse. and every little bit helps and for future posting just removing the chip wont help, when you take the chip out the car wont start so i need a new computer.

Tuned Performance

iTrader: (92)

the eprom in the memcal is the calibration for your engine and transmission combination it also contains a limp home network of resisters and sets the firmware for a v8. The ecm is a brick when you remove the memcal.

landon360

iTrader: (1)

the computer system in the car right now has this chip in it http://www.jegs.com/i/Hypertech/533/...FQ6EnQodrTAAnQ

which what ive read around is supposed to help HP by messing with the air flow and fuel mix ratio but in simple terms everyone ive talked to it doesnt do anything but dump more fuel into the motor. which if it doesnt help my HP i dont want it on there if its wasting gas. now as stated above when i try just removing the chip from the ECU it will not start so ive been told to just buy another ECU and put it in

Tuned Performance

iTrader: (92)

I assume you went with 22#hr injectors for the 350?
There are several hypertech some were oem memcals that were reprogramed, some were made for hypertech and have a black goo over the circuit board and a small chip under the eprom ( these cannot be reprogramed ) and a piggy back board that attaches to the oem memcal. You maybe able to get your memcal reprogramed depending on the style. You can use any tpi 350 automatic broadcast code from 86-88 but the 89 is a better definition but has vats enabled.

Tuned Performance

iTrader: (92)

The ecm thinks you are running 19#hr injectors and controlling the pw accordingly but if you were running 19#hr injectors on a 350 with a 305 memcal you run too lean and have over heat issues. When you run 22#hr injectors on a 350 and use a 305 memcal you run really rich.

landon360

iTrader: (1)

kept the same injectors from the 305. but they arent stock but were used in the 305 they are weird looking(ones i havent seen) they have 3 holes in the end instead of 8 or 9 smaller ones?? now im not an expert in fuel injectors or anything but it was something that the guy that put my motor in has never seen before. i was wondering if that had anything to do with my worsening MPG

Tuned Performance

iTrader: (92)

You should be able to identify the injectors by a number stamped or cast into the body of the injector. Did you install a adjustable fuel pressure regulator to compensate for smaller injectors ?

landon360

iTrader: (1)

doubt it lol. i didnt install the motor had a friend do it. but id say he didnt by not being able to see it under the hood or him telling me he did. i plan to buy 22LB injectors. but the ECU is what i want to replace first

http://www.automotix.net/usedautopar...0d1a&seq_num=6

would that be the one i need??

vetteoz

iTrader: (13)

You not getting it are you?

The ECM's are identical ; as you have been told above only the chip / memcal / prom ( whatever you want to call it )that has the tuning info is different to suit whatever engine the ECM is controlling.
All you need is a memcal for a 350 to replace whatever chip is in it now

Tuned Performance

iTrader: (92)

That seems like a waste of money if you haven't confirmed your ecm is faulty. A little much for. 1227165 ecm. Southbay fuel injectors.com has bosch 3 22#hr injectors for a good price.

landon360

iTrader: (1)

ohhh. sorry. i found one on ebay just now for $175. what is the main differences between these stock ones and the hypertech chips??

vetteoz

iTrader: (13)

And given it states the ECM suits both 305 and 350 engines, most likely it comes without the memcal as most ECM's do ( you are supposed to refit your existing memcal ) so you would be no better off

In any case $50 -$75 is a more common price for a used '165 ECM that you have

http://www.ebay.com/itm/86-89-Corvette-ECM-88999194-Latest-Upgrade-replaces1227165-16198259-Perfect-/190813213033?pt=Motors_Car_Truck_Parts_Accessories&hash=item2c6d5a9169&vxp=mtr

Tuned Performance

iTrader: (92)

If you want to waste you money I will sell you one for $50

landon360

iTrader: (1)

the memcal chip or the ecu?

Tuned Performance

iTrader: (92)

Ecm, I'm might be able to reprogram your memcal but I would need a picture of it first.

landon360

iTrader: (1)

i can probably snap a pic of it tomorrow, and is this what you were talking about replacing the hyertech chip with ??
http://www.ebay.com/itm/1987-350-TPI-Camaro-Firebird-Automatic-Computer-Chip-Memcal-PROM-ABWN-/360585764384?pt=Motors_Car_Truck_Parts_Accessories&hash=item53f4961e20and would adding the 22Lb injectors help my MPG any at all?

Tuned Performance

iTrader: (92)

Yes, but they are way over priced, you need to verify the injectors first and who know what cam is in your new engine but having a 350 memcal and 22#hr is the best you can do without dataloging and programing it yourself.

landon360

iTrader: (1)

well the motor came from oreilys its brand new and its what would have gone in an 87 camaro so everything is stock like cam wise

Tuned Performance

iTrader: (92)

Than 22#hr injectors and a 350 tune would get you back to a stock 350 configuration.

landon360

iTrader: (1)

i just wish that memcal was cheaper. seems overpriced like you said

Tuned Performance

iTrader: (92)

On tpi maf 86-89 the memcals are all the same it's just the calibration programing that is different between automatic, manual 305, 350. The can be reprogramed or there are several guys who are parting out thirdgens in the classified section here.

http://www.gearhead-efi.com/BCCFind/

Tuned Performance

iTrader: (92)

Thank you again for you buisness, sorry you had such a headache with the guy who did the swap lack of knowledge on the injectors and memcal change