by adding a g valve and fcd, how much power gains??

[jimGTS]

ive got a boost gauge to install, and plan to get these 2 other parts when the weathers a bit better.

what sort of power gains am i likely to get?? ive a rev2 gts tubby, only aftermarket performance part is my toms exhaust (i think, lol).

obviously if i set it to 15psi, what could i increase by??

[jimGTS]

has this question been asked too many times?? lol?

[zero]

Around 20-35 bhp

Maybe

[BenF]

ive got a boost gauge to install, and plan to get these 2 other parts when the weathers a bit better.

what sort of power gains am i likely to get?? ive a rev2 gts tubby, only aftermarket performance part is my toms exhaust (i think, lol).

obviously if i set it to 15psi, what could i increase by??

Hmm, rule of thumb is 1 extra psi = 10 extra hp.

But remember turning up the boost will only expose any exisiting faults and make them more obvious - and you may also need to wind back your timing a little to make sure you don't pick up detonation, even if you're using super unleaded.

[jimGTS]

ive got a boost gauge to install, and plan to get these 2 other parts when the weathers a bit better.

what sort of power gains am i likely to get?? ive a rev2 gts tubby, only aftermarket performance part is my toms exhaust (i think, lol).

obviously if i set it to 15psi, what could i increase by??

Hmm, rule of thumb is 1 extra psi = 10 extra hp.

But remember turning up the boost will only expose any exisiting faults and make them more obvious - and you may also need to wind back your timing a little to make sure you don't pick up detonation, even if you're using super unleaded.

could the timing be done at millway??

[The Morris]

ive got a boost gauge to install, and plan to get these 2 other parts when the weathers a bit better.

what sort of power gains am i likely to get?? ive a rev2 gts tubby, only aftermarket performance part is my toms exhaust (i think, lol).

obviously if i set it to 15psi, what could i increase by??

Hmm, rule of thumb is 1 extra psi = 10 extra hp.

But remember turning up the boost will only expose any exisiting faults and make them more obvious - and you may also need to wind back your timing a little to make sure you don't pick up detonation, even if you're using super unleaded.

Are you sure? So if you increase a rev 2 from 7 psi to 15 psi you will get 80bhp, that wil make them 300bhp with just that mod

[jimGTS]

ive got a boost gauge to install, and plan to get these 2 other parts when the weathers a bit better.

what sort of power gains am i likely to get?? ive a rev2 gts tubby, only aftermarket performance part is my toms exhaust (i think, lol).

obviously if i set it to 15psi, what could i increase by??

Hmm, rule of thumb is 1 extra psi = 10 extra hp.

But remember turning up the boost will only expose any exisiting faults and make them more obvious - and you may also need to wind back your timing a little to make sure you don't pick up detonation, even if you're using super unleaded.

Are you sure? So if you increase a rev 2 from 7 psi to 15 psi you will get 80bhp, that wil make them 300bhp with just that mod

where did you get 7psi from mate.
standard rev1/2 go to 10-11psi.
(there limited from 5-8psi in 1st and 2nd gear though).

[steve b]

the 10 bhp thing is fiction, at least on rev1 & 2's

at 1 bar with no other mods it'll prob get 235bhp but torque will go up to about 250lbs

er did i mention decats etc??

[jimGTS]

the 10 bhp thing is fiction, at least on rev1 & 2's

at 1 bar with no other mods it'll prob get 235bhp but torque will go up to about 250lbs

why are rev3 under rated and rev1/2 overated mate????

there must be a MASSIVE difference in performance for you to say that!

is there, really???

ive a rev2, and i hope it isnt the case

[jimGTS]

the 10 bhp thing is fiction, at least on rev1 & 2's

at 1 bar with no other mods it'll prob get 235bhp but torque will go up to about 250lbs

ps, love your "future plans" list in your profile!!

win the lotto first yeh, lol!

[steve b]

Yes the wish list is pricey LOL

anyway been to dyno days, seen lots of disappointed faces with my fellow rev1 & 2 guys estimating 250bhp etc from a boost increase to 15 psi and the rollers repeatedly came up with 230 ish figures. Stock rev1 and 2s were coming out at 210ish bhp stock rev3 n/as 174bhp (bang on expected) stock rev3 245bhp (bang on as expected).

you have read my mod list I have only just scrapped a shade under 250bhp torque was good at 260ish lbs

rev 1 & 2s just don't seem to produce

[Lee @ 3S Service Centre]

i remember the days when people used to make 265hp with a decat, exhaust, filter and 1 bar. What happened?

I belive Canny ran 267bhp on his rev 1?

GTSChris ran up to 278 i belive on his rev 2.

i think some cars run bad too as quatermile times have proved.

How come some rev1+2's run mid 13's down the quatermile yet some only scrap mid-low 14's with the same mods.

Ignition components maybe?

Just a thought

lee

[BenF]

ive got a boost gauge to install, and plan to get these 2 other parts when the weathers a bit better.

what sort of power gains am i likely to get?? ive a rev2 gts tubby, only aftermarket performance part is my toms exhaust (i think, lol).

obviously if i set it to 15psi, what could i increase by??

Hmm, rule of thumb is 1 extra psi = 10 extra hp.

But remember turning up the boost will only expose any exisiting faults and make them more obvious - and you may also need to wind back your timing a little to make sure you don't pick up detonation, even if you're using super unleaded.

could the timing be done at millway??

Yep, Millway know what they're doing. They do have a rolling road don't they? If so, you can do some runs and check for det at the same time. FWIW at 15psi i had to wind my timing on the standard Rev2 engine back to 7-8 Deg BTDC or so - but engines do vary.

[BenF]

Hmm, rule of thumb is 1 extra psi = 10 extra hp.

But remember turning up the boost will only expose any exisiting faults and make them more obvious - and you may also need to wind back your timing a little to make sure you don't pick up detonation, even if you're using super unleaded.

Are you sure? So if you increase a rev 2 from 7 psi to 15 psi you will get 80bhp, that wil make them 300bhp with just that mod

where did you get 7psi from mate.
standard rev1/2 go to 10-11psi.
(there limited from 5-8psi in 1st and 2nd gear though).

Yep, Rev1 do between 8.5 - 11.5psi (with 10psi the average) according to the BGB when on boost.

But - they're not limited in 1st and 2nd gear - I've got a LED which lights up when the ECU is energising the VSV to allow 10psi of boost (ie no det, engine warm etc) and it definitely comes on in second and in first - but things are happening quickly then

[BenF]

the 10 bhp thing is fiction, at least on rev1 & 2's

at 1 bar with no other mods it'll prob get 235bhp but torque will go up to about 250lbs

You're way off there. Rev1 Standard does 220bhp, at 13psi I got 250bhp and 253 ft/lbs :



Pushing beyond that and things become more non linear.

(edit -fixed typo)

[BenF]

i remember the days when people used to make 265hp with a decat, exhaust, filter and 1 bar. What happened?

I belive Canny ran 267bhp on his rev 1?

GTSChris ran up to 278 i belive on his rev 2.

i think some cars run bad too as quatermile times have proved.

How come some rev1+2's run mid 13's down the quatermile yet some only scrap mid-low 14's with the same mods.

Ignition components maybe?

Just a thought

lee

Depending on the car, 265-ish bhp on a Rev1 or 2 is possible with standard intercooler etc. The CT-26 can't flow enough air at higher revs and boost drops back to 14psi at redline - so you end up with lots of low down torque which drops away at higher RPMS when the CT-26 can't provide enough cool air.

Decat will make the car more 'eager' at redline ..

[steve b]

Jim said his car has no other mods, except and exhaust so no decats, told by Millway that decats give the biggest gains maybe the reason people get 250 - 260 is they have decats also?

[jimGTS]

what exactly is a decate???

is it a part, or a modification of a standard part i already have on the car?????

[steve b]

what exactly is a decate???

is it a part, or a modification of a standard part i already have on the car?????

decat = remove the catalitic convertor

see downpipes

[jimGTS]

what exactly is a decate???

is it a part, or a modification of a standard part i already have on the car?????

decat = remove the catalitic convertor

see downpipes

i thought as much (decat, "a detached catalitcic")

how easy is this to do, and more importantly, where the hell is it???
and i gather what your saying is if you remove the cat, you have to replace it with a downpipe???