Hi..

I have tried to find a tread or dynopaper on the gtx3582 turbo, but with no hell.
The closed I got were some talk on Howard colemans tread on the standing mile tread.

Sean@s-spec and Howard did discuss some tech about the gtx35, and what I could figure it seams like the gtx turbine wheel is way to smal for the compressor billet wheel.
I did hope for a 500rwhp car so I orderd 500r. from Sean, but garret never delivers the turbine wheel he needs to make the kit so I just orderd in the meanwhile the gtx3582 from someone else.

First I got crazy happy when I finaly got a kit and I saw the compressor map, 76 lbs/min.... thats nice.
But after some reading it seems like the wxhaust wheel is way to smal for that amount of air.

Can anyone give me a guess or tip or some sort of more information on the turbo?


I get cold feet on the hole turbo choise.

2 rotor scalped low comp 8,4 rotors.
Xsessive lim.
Ported UIM and feed trottlebody.
ROtary extreme v-mount midium size.
ID 2000 and 100cc inj. all in one fuelrail on the lim
Dual bosch 044 pumps.
Large streetport and some portwork on the exhaust ports.
rx7 store manifoil and rerouted wg 44mm tial.
3" dp.
680cc water only injection hfs-6
Single coils and ngk 10,5 heat plugs
vi-pec v44 ecu

I will anyway dyno my car in the next 3 weeks.
I have some things more to fix. Have to build abit on the manifoil since I have the exsessive lim and need a new gasket

 

Thats IMO general consensus.

500 HP is really vague. Most if not all dyno sheets posted on this site can be quoted as HP@crank
For that matter, I didn´t find single GT35R equipped car that would perform appropriately to power level above 500 HP, though dynosheets tell otherwise
All GT35R cars seems to top just under 500 HP@crank, and if the turbine is limiting factor, GTX will be very same.

Scalloped rotors would also call for bigger hotside. Though its different kind of overlap than agressive porting styles, it will benefit from bigger hotside.

If you want Garrett, GT3788R would be good choose. Or some custom unit like GTX compressor paired with P-Trim turbine.

 

you will want to run at least 20psi on that turbo to take full advantage of it

 

The plan was to run 28 psi witch is the max of what the compressor likes.
But like I understand so is the exhaust wheel to smal to get me that high , am I right?

 

GTX3582R turbo should get you easily 500whp at 28psi with the proper tune and parts. A 1.06 turbine is the largest frame offered for that turbo unless things has changed...

http://www.atpturbo.com/root/release...ase111110.html

 

You can run such "boost", but it doesn´t mean that it will flow more air or produce more power.
When you increase boost, you also increase exhaust backpressure which can have quite huge impact on volumetric efficiency and brake specific fuel consumption. Question is how big impact it is. Stock ported engine will be most tolerant, ported engine less. Point is, that you can run to the point, where increasing boost can marginally increase flow, but BSFC will deteriorate so much, that you will produce same, or even lower power.

You will have to try Maybe you will be first one with posted GTX3582R results and it will be much more than bunch of theories my included

 

I have seen a dyno run of 29psi on a GT35R( standard wheel 1.06 turbine a/r).

It wouldn't hold that boost pressure past 4600rpms, and started to taper sharply after that. I suspected it was chocking on the turbine wheel( was also twin 44mm open dumps). It made around 420torque and 470rwhp iirc. @ 5psi less boost our P trim GT35R ( TD61) made more torque and horsepower with a lot less aggressive tune to boot.

I have a customer who is close to tuning a GTX35R engine/turbo combo we built soon, will post results..

 

So what was the results???

 

the only advantage a billet has over a traditional cast wheel is that it will flow more power at higher boost pressures.... this is why most Evo's and Supras with billet turbos are running 35+psi to make 700+hp on a smallish turbo.

and even then i dont think the advantage is that big..... even 76mm billet turbos arent doing much better than cast wheels.

 

Dyno date is dec 6th. I will get operator to overlay vs prior gt35r runs and our td61...

 

this is false. The only advantage a billet wheel has over a cast wheel is its stronger. Now if the billet wheel is a more aggressive wheel that moves more air, then yes, you will see a performance gain. Simply swapping out identical 76mm wheels, cast to billet, will do nothing.

 

all else being identical...if the billet wheel is lighter, wouldnt that help it spool faster?

 

I might have found some 'evidence' of a figure like 520bhp from a normal gt35r 1.06.

I have got a result (read dyno number and a terminal speed in a setup drag car) saved somewhere for a 6 cylinder piston turbo with a gt35r with a 100shot of nos. It did not even do 500rwhp genuine.

 

I want to see the results too Elliot!

 

i'd like to know more. i've read around that says otherwise

 

Any updates ?

 

Just go with Turblown's td61..looks perfect for our cars

 

"I might have found some 'evidence' of a figure like 520bhp from a normal gt35r 1.06...

for a 6 cylinder piston turbo with a gt35r "

piston engines and rotary engines are very different as to the airflow (read turbo output) and power.

to solve for equivalent rotary power at X piston airflow you DIVIDE by 1.3

in other words if a particular turbo makes 700 piston it makes (700/1..3) 538 rotary.

hc

 

My setup is close to what was posted in the first thread im waiting to take it back for tune. I dont have a dyno sheet yet. I posted a pic a results so far in the single turbo setup thread

 

Yeah I agree, maybe not on your exact conversion numbers and I have my own I accept as true. The specific fuel consumption figures in my opinion are not seperated by the rotary being only 77% the efficiency of a piston engine.

I think for say comparing my 9.4:1 18psi 12AT to my friends 1998 9.0:1 VVTI 1jz-gte, that the efficiency difference is more around the 81% value. That engine got around 0.5BSFC in my opinion. ~430BHP. They both had similar mixtures and similar horsepower figures.

.45BSFC = 1988 spec formula 1 turbos with 38psi boost 9.4:1 compression and tunes around 14.4:1 Air fuel. Fuel was even a 'heavy' toluene based fuel.

I measured equivalent to .62 using pump petrol, naturally that would look like .59, .6 .61 on toluene.

I have seen with my own eyes a 2jz GT35R 0.82 max out at 448rwhp trying to drive 22psi (naturally drops to 17psi in top end because of the backpressure).

 

If you want to run the GTX compressor wheel it is best to buy our TDX61( GTX35R compressor mated to a P trim turbine wheel) This will allow you take full advantage of the billet wheel..