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11-12 psi is what the car would do stock giving everything's in working order. Now the 14.75 you saw or roughly 15 psi is pretty good considering the few mods you have. How's your base boost? Make sure that's set to 5.5- 6.0 psi and if it was slightly cooler out (60F) you could probably see an even 16psi sustained. You also probably even see 17psi for a second or two as well. I remember when I was shere you are now and for some strange reason I could not get past 14-15psi sustained boost, that's why I asked about your base boost. Either way those days are long gone for me. Today my 88'Airflow will push 18 psi at even 80F, and I don't have the base boost at stock specs just yet(a few days from now though, I will) and I'm sure those number will climb. 20 psi huh? Man that's a tall order but it can be done and your not too far off from getting there. Take it safely though, don't try pushing these old cars up there without the fuel to supprt them or you'll have problems. For right now I'd say 16 psi would be a safe limit. When you get some injectors, and the moded APC then move on up to 18-20 psi. I tried moding my stock APC but it wouldn't allow for the boost I wanted though, just kept kicking back on me. I now have the SPG9 stage 1 and it works great, like it alot. As of yet the best I've seen is 22 psi and that was on a pretty cool night for this swamp I live in
(S. Georgia @ 70F). I should also note as others here have mentioned before, there doesn't seem to be alot more power to be had after 18psi. I suspect it has soemthing to do with the turbo being less effecient at that point like I've read. I know that 16-18 psi feels powerful but pushing it up to 20 psi didn't seem to feel any different to me perhaps I need to tweak more things? What I really want(am going to get)is more power up to say 18 psi. Don't want more boost, just more power. Good luck and keep pressing forward, 20 psi is just around the corner.....
Take Care,
Phil
posted by 209.164.228...
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