hks cast manifold and TO4S or TO4R
 

hi,
i am about to purchase a gt3574 and i need to know if i will have fitments issues with the hks cast mani.
the turbo is from aspec and has a larger 74mm wheel with a t4 housing.
aspec sayes that if a TO4S or TO4R fits than i will be fine.
i do not know thw dimensions of the TO4S or TO4R so i need your help!!
thanks!!

It will fit the HKS manifold fine, they have a kit that comes with the T04Z turbo.

thanks scorpion,
do you know where can i see this kit?

Hksusa.com

I believe the GT3574 uses a P trim turbine housing/wheel, just like your typical T04S or T04R.

arghx,what is the p trim?
also, many gt35r are ordered with a t4 housing, same the 3574. my question is: why to kake a T3 turbo and convert it to T4 instead purchasing a T4 from the bigining (like t04s-r-z...) ?
thanks

P trim is a 74mm turbine wheel, its just the name they gave it. The GT35R has T4 housings from Garrett.

the gt35 is a t3.why to kake a T3 turbo and convert it to T4 (with housing and wheel)instead purchasing a T4 from the bigining (like t04s-r-z...) ?

The GT35R w/ T4 housing fits fine on the HKS manifold. (TO4S/R/Z all fit fine as well)

I do not know what you mean by larger 74mm wheel. The standard GT3582 is a 82mm compressor wheel. It can be purchased with several different types ot T3 or T4 turbine housings ATP GT35R

The TO4Z is a 84mm wheel ATP TO4Z

Here is a customers FD with the 35R on an HKS cast manifold, as you can see there is plenty of room to spare http://www.banzai-racing.com/cox/sep...1_10-19-06.jpg

35R turbine wheel is 68mm, 3574 turbine wheel is 74mm, 74mm is larger than 68mm.
35R compressor, 74mm turbine, equals 3574. Hope that clears it all up :)

Achilles, people put T4 housings (or convert) on 35R's because it makes sense in some applications.

The only thing that makes it a T3 is the turbine housing. You can swap to a T4 turbine housing without touching the turbine wheel.



Sean, dont lie to us, 74mm is NOT larger than 68mm :lol:

Ha! If I sounded pissy it wasn't meant to, just wanted it to be clearer for the next person.

That is funny, considering every other Garrett turbo on the market numbering is based off the compressor size

GT3582R (aka GT35R, aka GT35/40R)= 82mm comp wheel
GT4088R (aka GT40R)= 88mm comp wheel
GT4294R/GT4202R (aka GT42R / GT42RS)= 94mm/102mm comp wheel

And the list goes on forever just like that

So as you can see a 3574 = 74mm turbine is as ass backward as you can get, literally

Hope that clears things up :)

Ahhhh yes..... but precision goes 6062, 6765 and 7682 etc... but that is a precision turbo and not a garrett turbo. Borg warner is even different still. At that point one must conclude a 3574 is also not bound by garrett nomenclature since it is not made by Garrett. I'm sure you'll cut me some slack since were all one big happy turbo family. ;)

This does fit but I found it to be rather a close fit on the cold side maybe 1/2 clearance with the rail. Also this manifold is a pain in that it uses M10 * 1.25 threaded on the turbine flange side., although it is relatively easy to find bolts for this size finding studs and nuts I have found to be nearly impossible (to use safety wire).

sean,
this 3574 is from garret spares? or from precision? i am confused.

i am planing to install the mani and the 3574 without removing the engine from the car. is it posible?
thanks

Ah...I see where the confusion is. It is not a Garrett turbo it is just numbered as if it were one. I think lots of people are confused by this.

The HKS cast manifold comes with a T4 divided flange. It would be best to get a T4 divided turbine housing to match.

Also the rotary engine creates alot of exhaust energy so it is ok to use a larger AR. like a .96, 1.0+. This is what I have heard from ATP.

Also the HKS T04Z starts life as a garret T04Z if anybody was wondring.

Achilles, yes it is possible to install it on the car without pulling the engine. But the HKS cast manifold wastegate flange I believ is a T-25. HKS discontinued the wastegate that we used to sell the was a direct bolt on. I sell the HKS racing wastegate with the kit now and I had to make an adapter fitting to use the new wastegate. The HKS manifold wastegate flange is rectangular. The HKS wastegate flange is square.

I bolt on the wastegate to the manifold and then put the manifold with wastegate attached onto the engine, then the turbo to the manifold. Make sure everything lines up including your downpipe before you tighten all the bolts.

Believe it or not I think you hit it on the head. At least once or twice a week I get emails of people saying I don't see this on Garrett's site or parts list. I then have to explain it's a hybrid we have made using garrett parts.