ajmaudio

I am building a tpi motor for my jeep and want to use this ecm as its waterproof... I missed a deal on some from a vette and now can only find some that were used on various v6 cars... is it feasible to use one of these?? and im asuming I have to change the memcal or calpak whichever it has correct?

88SS6SPEED

iTrader: (2)

Yes you can use the 7727 from a V6, I've used one on a 64 IMPALA SS, just recently, and I also built my own harness for it. It is pretty simple really, and yes you will need to use an AUJP 5.7L MEMCAL. I used my old reliable AUJP custom MEMCAL from Howell-EFI that has VATS & EGR delete. It fired right up with this MEMCAL. Just get the 1990-91 CORVETTE engine wiring harness schematic, and construct your harness from that schematic. LMK if you need any help on information on the process. HTH's

BTW, the 4 ECM connectors from the V6 donor car has all the necessary pin locations for the V-8 configuration. You can use a standard PAPER-CLIP end to de-pin the connectors, for the re-configuration. When you go to the junk yard, make sure that you remove the RED pin retention plastic on the back of some other 7727 ECM's so you can get EXTRA blank plugs. Reason for this is that you can plug the UN-USED holes to retain the WEATHER/WATER-PROOF capability of the ECM. HTH's.

BTW, there are some other upgraded versions of the 7727 ECMs. You can look up the other ECM P/N's on this sight .

ajmaudio

what exactly do you mean by upgraded??? sorry if thats lazy to ask LOL

88SS6SPEED

iTrader: (2)

16197128 16198260, these are ECM replacements for the 7727 ECM, they are the exact same type of ECM's. I have a couple of these, and they work just the same. They are found in 1990-94 V-6 Pontiacs, and Chevy's.

The 64 IMPALA SS that I converted to TPI, had a freshly rebuilt 97 VORTEC block with new Trick-Flow TFS heads, Edelbrock 3860 TPI base, 24# LT-1 injectors, stock 94 LT-1 cam, LTH, 2500 stall, and 3.73 gears. HTH's

ajmaudio

I am assuming these are also weatherproof?? also.. it seems your build is very similar to my intiial thoughts.. I was planning on a vortec block, vortec heads, and an lt1 cam... there seem to be several lt1 cams... do you know the duration etc on yours? and how did yours turn out? Know anyone with a spare memcal ?? lol... only thing is that mine is a manual trans.

88SS6SPEED

iTrader: (2)

Yes they are exactly the same as the 7727, and in the same WEATHERPROOF casing. The stock 94/95 LT-1 CAM specs are ---202@ .450 (intake) / 207 @ .450 (exhaust)(1.5RR) on a 117 LSA. The car turned out really good. It isn't mine, but I can take a picture for you when I see it again. The MEMCAL that I used in the setup is actually mine, which was in my 88 Monte SS TPI 355/2004r/3.73. I actually converted my 88 SS to manual, back in 1997. I used a 94 T-56 and I used that same MEMCAL that was originally programmed for an AUTO. I haven't had a problem with it in that 12 years time period. The only difference is just a (FLAG)bit value changed in the MEMCAL program. HTH's

Check out my SS on my webshots page .

ajmaudio

that cam with 1.6 rockers should be a nice torquer... should still have plenty down low and low mid right where I need it. how was yours on 1.5 rockers?? im gonna be pushin 35 inch tires in a vehicle with the aerodunamics of a brick so tourque in a useable everyday rpm is key. now I just have to find a memcal and catch up on all this... I see people putting sockets on their memcals for what I would assume to be flash chips so they dont have to keep reburning.. am I right?

88SS6SPEED

iTrader: (2)

Yes the 1.6:1 will provide about .030 more lift, and will help the heads breath a little better. The 64 Impala SS runs fine with the 1.5:1 roller rockers. Your Jeep will have plenty of torque to handle those 35" tires, with the VORTEC heads and LT-1 CAM. Go over to FullSizeChevy trucks, and you will see many Heavy trucks with similar setups as yours and some with TPI's, that do very well. Definitely upgrade your exhaust system to a true dual setup of atleast 2.5", so it will breath freely. This is extremely important to your ultimate power production. Yes, the Moates adapter will allow you to use an EEPROM , which will allow the "Limp home mode" to be retained, and the programmed flash prom will provide the engine control. HTH's and good luck with your build.