i have an 88 fc with a jdm turbo swap in it.. the kid who put the engine in couldn't get it to run and now that i have it running and running damn good supprizingly how much boost can the stock engine take? its running up to 8 right now. supposivly street ported, 255 walbro, hks bov, fuel pressure reg, 3''exhaust, and i just bought a apexi neo. 205 hp 184ft on the dyno just wonderin how much more i can get. i have a turbo xs boost controller to put on and looking for a turbo/intercooler upgrade too.. thanks

 

no mention of injectors, i wouldn't push it much harder than you currently are without a wideband on it to tune it.

 

we tunned in on the dyno with a wideband sorry i forgot to mention that it must have a major injector upgrade because we had to cut the primarys back 25% and the secondarys almost 30%!!! its seems to be set up for a turbo upgrade but i'm just lacking the money....

 

we were using my neo on the dyno with the wideband and it was still running alittle rich when we cut them back but it seems to be making the best horse power and running very smooth other then 1 little glitch like a miss on the one pull around 7grand, but i havn't replaced the plugs since i got it just cleaned them so i wasn't real supprized.

 

running it on the dyno isn't always what it's cracked up to be.... most dyno runs are only for a short burst (maybe 15-20 seconds)thru the RPM range... so what may seem like a decent AFR on a short run may end up being a serious lean condition on a long run. If your fuel system isn't up to the task you will see the AFR's start rising the longer you run on load

 

so a wideband would be a good idea so i can properly tune it while i'm driving? or is there a better way?

 

the guy who tuned the car with me is a pro but,,,not with rx-7s, he had to call one of his friends who is a mazda guru and we tunned it how he said too. i didn't have my boost controller on at the time because we were more worried about just getting it to run right it was breaking up very bad when the secondarys kicked on and his friend even said it sounded like it had big injectors in it and told us fab up a good ground strap kit for it. i never even thought to ask about max boost i just wanted my car to run good now i want it to be faster without major risk of damage haha. when you play you pay thats all there is to it but its fun lol