SleeperZ Posted May 1, 2003 Share Posted May 1, 2003 Got my new air filter on last night, and I've been driving the freeways doing 3rd and 4th gear pulls. I wish my EGT was working, and I also WISH I had a wideband O2, but I am making do so far. I have a new fuel rail with 370cc SVO injectors and a Z31 ECU (stock '86 turbo) with a MAF element installed in a 3-1/2" intake pipe. I'm running 45psi base fuel pressure (a little more than I calculated would be necessary) and it seems to be running a little rich at idle and WOT, low boost. So a little extra is a good thing for testing. I cranked it up and pulled 16 psi boost (that's 14 psi for you sea level folks), and it pulls like a frickin' train! However, with the boost set solidly, as RPMs rise to 5000 and a little past, my fuel pressure is starting to drop (I need a gauge that reads more than 60psi!). So I back out of it. I will wire in a second Bosch high pressure pump, and possibly install the largest orifice in the AEM FPR to accomodate the extra flow down low. But at this point I am calling the winter OVER, and I am almost ready to take it to the strip~! Once the second pump is in, I hope to get the boost up to 18-20 psi this year. Quote Link to comment Share on other sites More sharing options...
mobythevan Posted May 1, 2003 Share Posted May 1, 2003 18-20psi, I'm going to have to see your car I'll be up in Denver on Saturday May 17th, if your not too busy maybe I can come buy and check it out. Sounds like things are going good for you on the upgrade. Should be awesome. Quote Link to comment Share on other sites More sharing options...
Lockjaw Posted May 3, 2003 Share Posted May 3, 2003 Maybe you need one good pump. I use the peirburg from Cartech, and it seems to deal with higher pressures just fine. I am on a 4 bar map, and I am not having a problem at 15 psi of boost. When I was adjusting the FPR, I had it a "little" to tight, and it went right off my gauge, and it didn't faze it. You could also check to make sure your wiring is up to snuff, and you have a good ground. The factory wiring, especially the ground. I am sure you know about all that, but I thought I would check to make sure. I would like to see what you run on that set-up, and could you email me a pic of the MAF arrangement? Quote Link to comment Share on other sites More sharing options...
Lockjaw Posted May 5, 2003 Share Posted May 5, 2003 The pic looked cool. I was wondering about doing that to my Cobra MAF, but haven't really looked at it hard, so I wanted to see what you did to it. Quote Link to comment Share on other sites More sharing options...
SleeperZ Posted May 6, 2003 Author Share Posted May 6, 2003 I cut off 2/3 of the metal housing, and shaped the 3-1/2" mandrel bent 45* piece to fit it. The hot wire was still a little close to the side of the pipe for my taste, so I spaced it out further into the center, and extended the leads of the thing so it would solder up to the circuit card. It's not perfectly centered, but not bad. I thought about screening it, but I got too lazy. My first drive with the thing, my air filter was too low to the ground and fell off after hitting something. I guess I got lucky nothing came into the MAF (or my turbo!), but the intercooler should give marginal protection for the engine against debris. Hence, the new higher flowing K&N Quote Link to comment Share on other sites More sharing options...
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