I have searched and read quite a few posts on boost issues, I don't post alot so here goes.

Mods: K&N drop in, Apex-i WSII catback and XS flash.

Issue: In 1st and 2nd gear I am barely getting any boost even when I get into higher RPMs. Maybe 5-7 psi max. unless WOT, even then maybe 10-12 max?

In 3-5th gear seems to spool and hit 18-19 psi in a normal manner.

I do not have a boost controller at all. I did a visual for any loose hoses, and exhaust leak and do not see any evidence.

Input appreciated.

 

lower gears = less load

less load = less boost

10-12 in first is pretty normal at wot

 

Only 10-12 psi in first? I get 21psi in 1st and 2nd. and 22.5 in 3rd onwards. I have logs if anyone is interested. I haven't touched the boost/vacuum lines.

 

Keep in mind also that if you do a wot pull from 5-7k rpms or higher, boost will be a lot less than if you nail the gas pedal at 2500-3000 rpms. Youre always gona get less boost in lower gears, specially 1st due to the load..Get yourself a mbc

 

Did you change tires? After I put on snow tires I was just spinning and couldnt get load on the car in 1-3

 

Cat converter on the car? If so how old? It may be clogged.

 

still should be no excuse to have 5-7 psi at WOT in high revs in first gear..........weird though. make sure all your vacuum lines are still connected. A MBC wouldnt hurt either

 

try cleaning ur drop in filter. could b hella dirty.

 

man that would suck if that were causing the problem......would have to be extremely NASTY..........EWWWW....lol

 

are you kidding? if you spin your boost is going to spike like crazy.


Go into a field with grass and mash it and tell me if your boost loads while spinning :P