AWeb80 Posted December 8, 2008 Report Share Posted December 8, 2008 Since my trans is going bad and I'm going to pull it and rebuild it, I figured, while I'm there I'll just pull the motor too. It's going to be March 1st till I can get my GP into my parents shop to tear into it.... SO, in the meantime, I want to build a motor and go OBDII so I can tune. What I want out of the motor is to be lightly modded, nothing crazy.....maybe around ~230-240 Crank HP. what ways will I achieve this from a 3400 ro 3500?......a 3400 is MUCH easier for me to get....so what parts off a 3500 can/should I swap on? I will obviously do -P&P the U/L intakes.....heads only if i can get instructions on where to do it for the best airflow -springs -mild Cam -Headers -Tune (isn't a big problem because a local gen2 GP guys has a cracked HP tuner that can do ALL 97-03 PCM's IIRC btw, I'm just getting a whole different motor because my 94 3100 has NON roller rocker heads and 126k miles.....and well, I want roller rockers and a lower mile motor to build. any educated input into this would be awesome. My dad said he would help me do this since he knows how to install cams, pistons.....all hardware etc. And I understand (for the most part) all the FI side of it. I DON'T know much about the hardware installation side. So, what he and I do/don't know will make a complete combo.....LOL How do I convert to OBDII? Quote Link to comment Share on other sites More sharing options...
BXX Posted December 8, 2008 Report Share Posted December 8, 2008 Honestly, the easiest way to convert to OBD2 is just to install a full vehicle harness from a donor car.. No wiring experience needed and its plug and play. If not going that route, get a full engine harness and bust out some wiring diagrams, there wont be too much needed to change at the firewall connector. Use any 97 3100 PCM and you can tune with HP. The PCM is plug and play. I just used a Lumina PCM because it was the easiest to find of any compatible 97 vehicle. Quote Link to comment Share on other sites More sharing options...
Brian P Posted December 8, 2008 Report Share Posted December 8, 2008 PM coming Quote Link to comment Share on other sites More sharing options...
AWeb80 Posted December 8, 2008 Author Report Share Posted December 8, 2008 waiting..... Quote Link to comment Share on other sites More sharing options...
AL Posted December 8, 2008 Report Share Posted December 8, 2008 I wanna help to... I dont know very much but Since I wanna do something similar some day, I wanna learn! Quote Link to comment Share on other sites More sharing options...
blackbombshell95 Posted December 9, 2008 Report Share Posted December 9, 2008 98/99 Monte carlo pcm/harness would be the better choice. Quote Link to comment Share on other sites More sharing options...
Brian P Posted December 11, 2008 Report Share Posted December 11, 2008 98/99 Monte carlo pcm/harness would be the better choice. Is there an issue with using that? Since I thought the '98+ uses a pressure sensor at the tank to determine when to operate the EVAP system, and the '94-97 doesn't have this sensor... Also I didn't get into detail with it, but the 4T60e does not interchange between '95-97 and '98-01 due to *supposedly* a wiring and/or sensor difference. Also, I believe '98+ PCM's allow slippage of the torque converter during highway driving acceleration, and '98+ TC's have Kevlar clutch material that could handle this. '97 and earlier torque converters had the traditional carbon clutch material that would shred up under slippage. If these could be overcome (disconnect the PWM solenoid, or maybe tune it out, but I don't remember seeing this option when looking at the powrtuner file), it would be a better swap candidate. Quote Link to comment Share on other sites More sharing options...
AWeb80 Posted December 12, 2008 Author Report Share Posted December 12, 2008 Well, I think I may hold off on this build for a while....I really want to do it..but, I don't feel like pulling money out of the bank at this time in the economy....and my hrs are getting cut too... I will still probably make headers while the trans is out though...... Quote Link to comment Share on other sites More sharing options...
19Cutlass94 Posted December 12, 2008 Report Share Posted December 12, 2008 Well, I think I may hold off on this build for a while....I really want to do it..but, I don't feel like pulling money out of the bank at this time in the economy....and my hrs are getting cut too... I will still probably make headers while the trans is out though...... well come summer time, if you want a small cam I just might be selling mine. Quote Link to comment Share on other sites More sharing options...
Dave3500Z Posted December 21, 2008 Report Share Posted December 21, 2008 a 3400 with a 3500 top end, the "header" style 3500 exhaust manifolds, 65mm TB and tuning would be more than 250 crank HP. sticking in a good cam would get you closer to the 300 mark. 3500 heads flow very well. Quote Link to comment Share on other sites More sharing options...
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