Toyspeed.org.nz Message Board

by **cynakyl** » Thu May 18, 2006 7:13 pm

Hey all, my 97 gt-t seems to be playing up a little but i've never had a turbo car before so i not too sure what it could be. i put a boost gauge in it a month ago and it always boosted to about 12.5 psi even under hard acceleration. i've since come to assume this is the factory limit. but in the last couple of weeks i've noticed that under hard acceleration it now goes up to 14-15 and then drops down to 12ish. anyone have any idea what could be causing this and if it's bad? ( i assume it is). also if it a problem how would i go about fixing it.

by **sergei** » Fri May 19, 2006 12:22 am

I always assumed that GTT are boosting arround 1bar (14.5psi) from factory..

by **Punter** » Fri May 19, 2006 10:09 am

Yea in my mates one its 12~13psi in 1st and 2nd 13~14psi in 3rd and 4th.

Santa's TardMe Listings · by **Santa'sBoostinSleigh** » Fri May 19, 2006 11:38 am

yup thats pretty normal, mine does it too

depends on plenty of things such as load, fuel, intake temps etc

by **cynakyl** » Fri May 19, 2006 7:05 pm

so it normal for it to fluctuate a bit before settling at one point? ok that good, here i was thinking there was something wrong with it.
thanks guys.

by **Wildcard** » Fri May 19, 2006 7:11 pm

a 10c drop in temperature equals ~1psi increase in boost to me....

by **mr2_t** » Sat May 20, 2006 12:28 pm

yeah its the cold weather

I have actually adjusted my MBC a bit - it was hitting 15 psi the other day - really dont want more than 13 from a CT26

Santa's TardMe Listings · by **Santa'sBoostinSleigh** » Mon May 22, 2006 11:13 pm

mr2_t wrote:yeah its the cold weather

I have actually adjusted my MBC a bit - it was hitting 15 psi the other day - really dont want more than 13 from a CT26

no not the cold weather, more like a function of the boost solenoid or something similar

by **Jazza** » Mon May 22, 2006 11:34 pm

May pay to ask some of the turbo owners here. Depending on your engine, theres ALOT of things different (From what i understand) about maintaining your engine with a turbo compared to an N/A car.

Thats if you are completely unsure (I really dont have a clue how much you know :wink:

)

Caldina GTT · by **Inane** » Wed May 24, 2006 11:49 pm

check your waste gate for gunk.
also check your turbo for shaft play.

get an electronic boost controller to keep that sucker in line.

more than about 15-17(I dont recommend more than 15) will lose power.

OMG so shiny! · by **Dell'Orto** » Wed May 24, 2006 11:53 pm

mr2_t wrote:yeah its the cold weather

I have actually adjusted my MBC a bit - it was hitting 15 psi the other day - really dont want more than 13 from a CT26

Nah 15 is fine, mine was rather happy on 15psi for ages

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gt-t boosting funny?

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