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-   -   odd boost needle? (https://www.cobaltss.net/forums/problems-service-maintenance-69/odd-boost-needle-309209/)

josh6854 Apr 22, 2014 01:34 AM

odd boost needle?
 
I'm wondering if my car is tryin to boost more than should. For instance when I take off from 1st 2nd it seems to jump to to high between shifts. I'm shifting at 25k.

LNFTX Apr 22, 2014 07:08 AM

Holy hell what kinda valve springs you runnin?

BlackielawlessSS Apr 22, 2014 08:51 AM

25k rpm holy crap!

ECaulk Apr 22, 2014 09:25 AM

This is not the problems section of this forum just a fyi. (You want to post in problems and maintenance sub-forum).

More information is needed for anyone to give help/advise

BlackielawlessSS Apr 22, 2014 09:45 AM

I am betting a clogged cat.

ECaulk Apr 22, 2014 10:25 AM


Originally Posted by BlackielawlessSS (Post 7328307)
I am betting a clogged cat.

Good chance that's what it is, but given the lack of info going straight to clogged cat is difficult since we don't know what pulley/tune and what his WOT boost is

BlackielawlessSS Apr 22, 2014 10:44 AM

Very, true. I think mine is clogged or it is my fuel filter.

josh6854 Apr 22, 2014 12:22 PM

I just installed zzp 3" full exhaust with dp and high flow cat a month a ago. 2.9 pulley with 60# inj and h/e.

ALSO, I know I'm needing engine mount and crank relearn.

insylem Apr 22, 2014 03:02 PM


Originally Posted by josh6854 (Post 7328229)
I'm wondering if my car is tryin to boost more than should. For instance when I take off from 1st 2nd it seems to jump to to high between shifts. I'm shifting at 25k.


What kinda mods do you ahve to shift at 25, 000 RPM???
Dang!

My RPM gauge only goes to 8, 000 RPM With a rev limiter at 7, 000 RPM.

josh6854 Apr 22, 2014 03:23 PM


Originally Posted by insylem (Post 7328522)

What kinda mods do you ahve to shift at 25, 000 RPM???
Dang!

My RPM gauge only goes to 8, 000 RPM With a rev limiter at 7, 000 RPM.

Dude.. my bad 2.5 grand better?

josh6854 Apr 22, 2014 03:25 PM

Could my valve on the sc be the issue? A friend once before was tryin to adjust it

LNFTX Apr 22, 2014 03:57 PM

Im confused
Why is there any boost if your doing a 1-2 shift at 2.5k?
Wot short shift?
I dont know too much about lsj and how bypass and the tune works and such but if I am putting along granny shifting at 2.5k there's no boost.
Hell if your shifting it that low you could be causing it to bog down

josh6854 Apr 22, 2014 06:15 PM

I thought shifting at 3k was high but maybe I should try it. It just seems like my needle jumps into boost to soon like around 3-5psi

insylem Apr 22, 2014 07:12 PM


Originally Posted by josh6854 (Post 7328657)
I thought shifting at 3k was high but maybe I should try it. It just seems like my needle jumps into boost to soon like around 3-5psi



3- 5 being high? Dude Stock is 12.5 PSI boost....

ECaulk Apr 22, 2014 08:01 PM


Originally Posted by insylem (Post 7328694)
3- 5 being high? Dude Stock is 12.5 PSI boost....

Agreed 3-5 is not high. Does the lsj control boost off throttle/load?

josh6854 Apr 22, 2014 09:38 PM

I'm boosting over that its just seem its boosting to soon. I think the my buddy adjusted my valve on the sc and its allowing it to boost when it shouldn't

I try to keep it out of boost riding around town but its hard with it trying to hit into boost

I try to keep it out of boost riding around town but its hard with it trying to hit into boost

LNFTX Apr 22, 2014 11:55 PM

Is it making any boost at idle

josh6854 Apr 23, 2014 12:40 AM

No just when I take off threw the gears it seems the needle reaches boost to easily like around5-7 psi. Its almost impossible to stay out of boost just daily driving it. My friend says it could be the bv on the sc was somehow adjusted and throwing my boost levels off.

insylem Apr 23, 2014 02:14 AM

That sounds about normal

There is a tune option that ZZP offers that I have where it reduces boost by 50% in 1st gear.

REDi DEViSTATOR Apr 23, 2014 05:27 AM

Just drive the damn thing. Yew haz tinee pew lee noa. It makes boost easy. So?

josh6854 Apr 23, 2014 10:19 AM

Ok thanks guys and Insylem I'll check on that


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