400rwkws From Gt3540 .82

[kastin]

nice article but without the wheel sizes it's not proving anything.

<quote>

well on 1.7 bar with our gt3040 .82 we made 375rwkws and 365rwkws on 1.5. After 1.5 it was starting to blow hot air and power wasnt increasing much as you can see.

</quote>

This sounds promising!

whats cams did you have?

ill br running 272,10.3's so i dont really want to go the 3540 (1.06)

[r33_racer]

just 256 8.5 poncams. So nothing too extroadinary. The head has a light port n polish on it to clean up the dags and rough spots.

[Devils_Advocate21]

I think we should call mythbusters! Nah very nice 450, im guessing a fairly decent size a/r 1.06 above mind you lowered compression highlift cams, but does sound bit unreasonable from the guage of the other posts, yet does not state what fuel is run to achieve that power, C16?

[r33_racer]

methanol maybe

[R31Nismoid]

Only 128mph?

I rest my case

[Nabil]

Good you do that

Cause telling people they can make 450rwkw off a GT35/20psi on PULP with just 260 cams/no porting is a joke and would grossly mid-lead people

We'd better see a MPH well into the 135 range (140 possibly i think).

You'd also better send a letter to Garrett, they'd be interested to know about it aswell im sure.

Couldn't agree less.

My mate ran 9.95@136-138mph (VL) with 1.6/7 60'ft marks making 367rwkw

On 9 or 10inch slicks with front runners.

So if someone were to run with 450rwkw and full slicks, you'd expect nothing

under 140mph to justify the claimed power output.

Hell...with that much power you would expect a 10sec pass on re-treads...

However, if the stated power is correct on such little boost pressure...that person would probably put GARRETT out of business if he could supply Gt3540's that may produce that much power on such little boost.

GARRET would probably discontinue production of the GT45's

[Col-GTSX]

that person would probably put GARRETT out of business if he could supply Gt3540's that may produce that much power on such little boost.

GARRET would probably discontinue production of the GT45's

Yep...

Im not seeing it on Plup and 19psi as R31Nismoid said the trap speed is far to low, as mine are 130mph and im well short of 450rwkw...

Now im not sayign that he does not have 450rwkw im just syaing there is something missing here like methnol or funny gas...

[discopotato03]

Just to sow a few seeds of doubt ...

A while back I came across a few pics of what the Americans sometimes call a "GT35R T4" , this is basically a std issue GT3582R cartridge and comp cover but its turbine lives in a reprofiled TO4 turbine housing . I'll have a look and see if the pics are on this computer .

What Arnie said .

Edited February 3, 2007 by discopotato03

[The Alchemist]

a guy here in NZ has a .82 gt3540r running 450rwkws on an rb25det (stock internals to)

Just to upset you all further, lol, we had a car make 477rwkw on our dyno dynamics dyno, often accused of reading too low .... yeah right

rb25 head rb30 bottom end, head majorly modified for flow with epoxyed ports and big cams etc etc running a 3540 with the 1.06 exh housing and all supporting mods running a haltech ECU. The car is an absolute weapon! Not sure if it was on PULP but can check.

Will also get the dyno graph to show you all.

Couldn't believe my eyes actually but "hey" I was there and thats what the dyno said

Fuel usage logged on the haltech at the 11.5:1 AFR matched up with calculated power figures too. Thats always a good guide to use. The laws of physics don't change after a good arguement eh?

Mike

[R31Nismoid]

How does that upset anyone?

Its a different car, different setup, and unknown fuel/boost again.

Shall i just get out a ball of string? Its about as accurate as your information... or should i say, lack there of

[discopotato03]

Pics not on this computer .

The rotary turbo people say that using a T4 turbine housing moves the whole power range upwards , depending of course on housing A/R . Just my 2c worth I always thought the GT3582R had a little too large a compressor trim or not enough turbine depending on your point of view . Using larger than the biggest factory 1.06 A/R turbine housing will reduce turbine inlet pressure but it may be trying to tell us that the turbine is running out of legs . It makes me wonder why Garrett didn't make something like a TO4Z but with the GT40 82mm compressor instead - TO4 40R ?

Cheers .

[nemini90]

there is a 3540 that might do it. its called a 3566 spl it has a 66mm front wheel and a .80 front cover i have one wiht a 1.06 rear and hope to make 450rwkw with my 2530 combo

[kastin]

we know you can make well over 400rwkws on a 1.06 but the issue here is doing it on the .82 in reasonable boost level.. you cant run 35 psi everyday on the road, engine wont last 2 years..and the turbo would be hurting..

[Cubes]

The owner of a local tuning workshop owns an XR6T. He told me to push over 400rwkw they enlarge the internal gate and drop on a T66 (?) comp wheel with a .7 comp cover leaving the turbine wheel standard. IF they want to go all out I think he said they ?back cut? the turbine wheel.

[discopotato03]

That would be the GT35R with the TO4R compressor swap . In the US they're called GT3567R though by Garretts own system it would be called GT3584R . Many don't agree but I think its a case of fitting a larger size AND trim compressor to a turbo thats borderline on turbine size to start with . If I really wanted that compressor I'd buy a TO4Z because thats what they get standard but with a larger diametre smaller trim (76 vs 84) TO4 P turbine . They also have the larger diametre turbine shaft and bearing cartridge and don't tend to bend this shaft like the GT3567R can at times . The TO4Z is a Garrett factory tested combination where the GT3567R is a "wildcat" or aftermarket hybrid .

Peaceables .

[kastin]

yere

man but some of us whatz jusyt want to know whata a gt3540 .082 will create

NO MORWE MSGS off chops

Edited February 3, 2007 by kastin

[discopotato03]

Well according to Garretts own compressor and turbine graphs ~ 65 lbs of air at 60% efficiency for the compressor and ~32 lbs/min corrected exhaust gas flow at ~ 2.4 - 2.5 pressure ratio or ~22 psi gauge pressure .

At the bleeding edge I guess that means if you assume 11 Hp per pound of air 65 x 11 = 715 at approx 2.5 pressure ratio (22 psi - gauge) .

At the sort of gas speeds to take this turbo to the limit you possibly need to consider T4 flanged turbine housings so that the gas speed into the housing is not high enough to be forming a restriction or pressure rise .

Found the pics of the T4 housing on GT3582R . ATP turbo have had a couple made as well and the pics are on their site .

Cheers .

Edited February 3, 2007 by discopotato03

[T04GTR]

then why the f**k is my motor only making 307awkw on 20PSI thru a to4z .84 split rear?????????

gay i should be up heaps. could it be the 230000k old motor and stock everything inside?

[2rismo]

The name of the thread should be;

"135mph+ from GT3540 .82"

Otherwise all discussion is irrellevant.

[R31Nismoid]

then why the f**k is my motor only making 307awkw on 20PSI thru a to4z .84 split rear?????????

gay i should be up heaps. could it be the 230000k old motor and stock everything inside?

That is correct

You need cams/cam gear, little bit of a tidy up of the head too.

On 20psi going by most others, you should be up above 350rwkw easily