Anyone running a GT35R on a 7mgte

[supra87t/t4]

One more thing i keep seeing the gt35/40r thats just a gt35r with a gt40 compressor wheel correct? how would that turbo compar to an off the shelf gt3582r??

-Dan

GT35R = GT3582R = GT35/40R

They all have the same 82mm 56 trim compressor wheel. So that's where the 82 (GT3582R) comes from. I think this compressor may have originally been in the GT40 (non-R) and that's where the 40 (GT35/40R) comes from.

(EDIT: As posted above there is a difference in trim between the GT35R compressor and the GT4082 (50 trim), which is why it has a smaller inducer, but that just has has to do with how it is machined, they likely come from the same casting which is why they have the same major diameter.)

I'm looking at the same turbo, and from what I've seen/read it will be plenty for 500hp, since the general concensus is the factory 600hp rating is conservative. I'm also planning on the .82 A/R turbine housing and spinning to ~7K rpm. I haven't decided on a T3 or T4 inlet yet though since I will be making my own manifold.

Glen

 

[TurboStreetCar]

ah i see....so a gt35/40r is the gt3582r, alright so pretty much a gt3582r is a gt40 with a smaller turbime wheel =ing faster spool, nice. thanks for clearing that up for me. gt3582r it is.: bigthumb:

 

[supra87t/t4]

ah i see....so a gt35/40r is the gt3582r, alright so pretty much a gt3582r is a gt40 with a smaller turbime wheel =ing faster spool, nice. thanks for clearing that up for me. gt3582r it is.: bigthumb:

Well, the 88mm compressor wheel is more common in the GT40 series. The GT4088R = GT40R has the 52 trim and the GT4088 (non-R) has a 54 trim. I don't think many people would run the GT4082 in a performance application. Obviously the R deontes the ball bearing center-section.

 

[NashMan]

gt35 40 r is spoool king for a 7m but lack's top end case of you have to push the trubo harder aka race gas and huge for a 1j to certon extent ect

it really depends on what you want

i was going to go the gt root but i change my mind and got pte 67 ptrim

 

[WeDgE]

gt35 40 r is spoool king for a 7m but lack's top end case of you have to push the trubo harder aka race gas

Wtf?

 

[tubbie]

gt35 40 r is spoool king for a 7m but lack's top end case of you have to push the trubo harder aka race gas

Ran it through a translator.......................:kloguck: ffwall: :bigun2:

"the gt35 and 40 R spools very fast on a 7m engine, but if your going to push very high boost with race gas, the turbos run out of steam at the top end."

Not true........... No loss in top end at all.
GT40 dyno........... This blackdevil's supra from SF
GT40-88 .81 A/R Turbine Housing
VPC / AFC / 760cc Inj. / Dual Walbros
562whp / 502 ft-lb @ 19.5psi

 

[IJ.]

Stock redline use a .63

bump it up to 7000 use a .82 and for above 7700 the 1.06 works well as it softens the power delivery helping with drivability.

Mine goes positive boost at 2200 and a 3540R making 1 PSI is very impressive.

 

[NashMan]

ok i see that you missed my point

in order to get big number form gt35 40 r u have to push bigger boost

compared to pte 67 or big gt40

 

[IJ.]

Nash: A gt3540 outflows a gt40 at the same pressure ratio.

 

[BlackDevilSupra]

Thanks for posting my dyno sheet Tub.

I am convinced no other turbo can eclipse the performance of the GT4088 for what it can deliver. If you desire a turbo with 500 - 700whp capabilities, then this turbo will be the most ideal. Man 500+ ftlbs @ ~4500rpm is amazin', trust me. Note, this wasn't the most efficient tuning at the time, so I suspect that the hp slope would have continued increasing.
From the compressor maps that I had evaluated that convinced me to select the GT4088, 25psi+ was the sweet spot for this turbo and is just waiting to be awaken. I'll be thoroughly pleased if my AEM EMS will allow me to take full advantage of this turbo at those boost levels.

Ran it through a translator.......................:kloguck: ffwall: :bigun2:

"the gt35 and 40 R spools very fast on a 7m engine, but if your going to push very high boost with race gas, the turbos run out of steam at the top end."

Not true........... No loss in top end at all.
GT40 dyno........... This blackdevil's supra from SF
GT40-88 .81 A/R Turbine Housing
VPC / AFC / 760cc Inj. / Dual Walbros
562whp / 502 ft-lb @ 19.5psi

 

[WeDgE]

in order to get big number form gt35 40 r u have to push bigger boost

That's the *science* behind any turbo setup...

 

[NashMan]

Nash: A gt3540 outflows a gt40 at the same pressure ratio.

in certon point of it's map

i just saying is on pump the pte will out do the gt35 40 r

well in my set up any ways

 

[blackout_89t]

in certon point of it's map

i just saying is on pump the pte will out do the gt35 40 r

well in my set up any ways

I have a GT40 and a friend (mark that came and visited you last summer) has a pte67.

If he ever gets his car running we will line up and see what turbo is better. :naughty:

 

[TurboStreetCar]

How would someone go about reading a turbine map like garrett has on there website? like how would u read this...

how do u figure out what the pressure ratio and air flow is?

 

[supra87t/t4]

These are harder to interpret than compressor maps, but what it is telling you is the flow through the turbine at a given pressure ratio.

The pressure ratio in this case is the ratio of the pressure in the exhaust manifold to the pressure in the downpipe.

The flow through the turbine is the flow of the compressor plus the flow of fuel through the injectors minus the flow out the wastegate.

That's what the chart tells you, what conclusions can be draw from it are harder to understand from a purely theoretical standpoint. If you had collected some data from say a .82 housing this would give you an idea what to expect from a 1.06 or .63 housing in the same application.

Glen

 

[TurboStreetCar]

i see, so basicly i shouldnt even look at that becasue it will take about 30 minuites of math just to get an theory on it? lol

 

[Orion ZyGarian]

The best way to look at compressor maps are to look at the innermost oval, and where the widest part of it is would be the most efficient part. On the side will be the pressure ratio...2.0 means you are running 1.0 of ambient (14.7 at sea level) and 14.7 psi of boost. thats the basic idea

 

[Nick M]

Nice informative thread.

 

[IJ.]

Just thought I'd add ALL of my runs have been straight waste gate no boost controller so I'll post some more info when I get back to the dyno!
(some 30 psi pulls are on the cards)

 

[Reign_Maker]

Give me 2 months, if you guys can wait, and I'll let you know how a GT4067R handles on a 7M...