rx-7-94

So i read through a bunch of info in the FAQ's to try and figure out why in first and second gear i get really bad boost spikes like 1-1.2 bar (not good) but i cant find a clear reason? any ideas on what i could look for or check to make this easier?

dgeesaman

iTrader: (7)

What are your mods?

When you're running more mods and still using stock boost control I think it tends to create more spikes. A good electronic boost controller or ball-spring boost controller has helped many folks with this.

Dave

rx-7-94

I dont have lots of mods

3" exhaust all the way no cat
K&N air filter
Street port
3mm seals

I thought about geeting boost controller, any recomendations for the best one?

sevensix

iTrader: (1)

wouldn't the 3" exhaust path w/o cat alone be enough to cause the spiking

dgeesaman

iTrader: (7)

No cats is a big mod. Not huge power, but it will f**k with your boost control. The fact that you're only running a K&N in a stock airbox is probably what's keeping your boost from creeping as well. You definitely need some different boost control.

Since I personally hate paying more for things that don't perform better, I recommend a ball-spring manual boost controller rather than an electronic one. But whichever way you go it should give a massive improvement.

Dave

rx-7-94

Alright that sounds good ill order one and get it installed and see what happens..
Is there something else i should do to the intake maybe since i do have the exhaust open so much, i thought about doin the individual filters but not sure??

dgeesaman

iTrader: (7)

The open filters will flow more. It might cause your boost to creep, which no boost controller can stop. (Creep is when the wastegate is fully open and it's still not relieving enough exhaust). To be safe, you should port your wastegate before making any more intake/exhaust mods.

Dave

dhahlen

iTrader: (5)

I was about to say the same thing, wastegate porting will fix a boost creep problem. I had it done and it fixed things for me when I was running twins.

rx-7-94

That sounds good, yeah ill get that done too while i am at it.

Thanks for the help..