Boost problem

[sweetr33]

Hey peoples,

I got a 93 r33 gtst, its got a 3 inch exhaut and a k&n pod filter among other things but they are the engine mods that im aware of. It has a greddy boost controller-just the turn dial one from in the engine bay. Whe i got it i knew that the boost was tweaked abit and have since been playing with it abit. I was having problems with it and people have told me that what im experiencing is boost cut!!! If i was cruizing along in 3rd at round 60 and then plant it once it hits between 3 and 4 grand it jolts and comes good then jolts and so on. So i turned the boost down 2 notches and tried again, still happening, so another 2 notches and now it doesnt do it but there is a major difference in power now. I mean on a cold night it was pretty good at the previous boost levels aslong as i stayed above 3500rpm in 3rd 4th n 5th. So on the highway it went really well but round town i notice the stuttering more so now. I changed the plugs and put iridiums in and also changed the fuel filter. And gave it a service. I only got the factory boost gauge and was unsure of what it was running before but it used to stop at 7 but now after turning it down 4 notches it is on bout 6. Much much slower on boost now. Not happy with it and want to know if there is anyway to get around this boost cut situation without getting a front mount?

[chris]

sounds like exactly the problem I am having....(see my new thread) if i get to the bottom of it I will let you know.

[gtrhybrid]

I had the same problem with mine and It was a bad connection with the afm plugs. I sprayed plug cleaner in and drove it then the problem was fixed. Funny that there was no engine code flashing

[chris]

sounds like a good tip..... only with mine the problem has been cured by removing the cheap and nasty mechanical boost controller.....all I need to do now is work on restoring the kick ass power I was used to. From what I have learned recently a good electronic boost controller is the way to go.

Cheers

Chris

[Jay95R33]

OK - if your getting a reading of 6-7 on the factory boost gauge that means your running about 13-14psi !! (7 on the factory gauge is close to 1 bar).

It will be the factory boost limit or your plugs. Regapping your plugs to 0.8mm might help.

I wouldn't recomend that you run more than 10psi if it's a series 2, and 12psi if it's a series 1.

J

[gtrhybrid]

Never trust a factory boost guage.

[chris]

yep, it's a series one.....I have an auto meter boost gague, with the origional disconnected. As mentioned above the car now runs smooth, I just need a reliable and controlable way of reaching the 10.5 psi it now reaches through a restricter. I don't think it needs to boost any higher than that.....just want to get there a bit quicker!!

Ta

[walkoau]

just get an aftermarket boost gauge to see exactly what ur running.

[gtrhybrid]

were you running a bleeder? and did it have long lines or short ones? The longer the lines the more room for boost creep and inconsistency.

[chris]

F***ed if I know.....the guage displayed the same as the fancy big machine at the workshop though....so I'd say it's reliable....

[sweetr33]

u serious?>? 7 on factory gauge is 1 bar? shyte. Actually a dude from brag told me that i am hitting the boost cut. I turned the boost down 4 turns and it doesnt do it now but its alot slower than before/.