HTA GT35R vs normal GT35r. Questions?

[D Money]

I assume they're very new, but FP has a HTA GT35R that everyone is going crazy over. It apparently spools much faster and makes just as much power. Does anyone know anymore info on this? Can you get this turbo in a 1.06 housing, instead of a .82 GT35R?

I can't figure it out by the information listed on FP's site. It gives you a price if bought through them and an option to send your existing garrett turbo to them and upgrade it to the HTA compressor wheel for $450.

Link:

http://store.forcedperformance.net/m...de=NTGT3582HTA

any info would be absolutely great!

Thanks.

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[SubieStylez]

Im planning on this turbo or a GT30/40. I only hear good things too. Should be interesting.

[MartinSTi05]

Between Conversations with Geoff at Full Race and a gentleman at FP I have gleaned this information.
This turbo still uses standard GT35R center cartridges and exhasut housings.
Apparently they use a billet machined compressor wheel. According to Forced performance it has a lower rotary inertia than a standard GT35R wheel, and due to the freedom afforded by 5 axis CNC machining has a shape that is hard to duplicate with casting. According to FP the compressor will move more than 70 LBS/Min efficiently also. Additionally any standard GT35R Exhaust housing will fit. I plan to put a divided 1.06A/R housing on when I get mine, oughta be interesting... Also as listed on the website they provide a slightly different compressor housing which apparently has a surge porting configuration which better lends itself to laminar flow than a stadard GT35R housing.

[AdamBOMB_STi]

The HTA modification is only on the compressor side of the turbo. You can use whatever exhaust housing you want; .63, .82, or 1.06.

[D Money]

ok awesome information!

so I can run the 1.06 exhaust housing and just send them whole turbo to get the hta compressor wheel?

Does Full-race kits already come with this wheel, or no?

OT, but Adam, which exhaust housing do you run?

[AdamBOMB_STi]

Originally Posted by D Money

ok awesome information!

so I can run the 1.06 exhaust housing and just send them whole turbo to get the hta compressor wheel?

Does Full-race kits already come with this wheel, or no?

OT, but Adam, which exhaust housing do you run?

you'll probably have to send your turbo to FP after you recieve the full-race kit. to my knowledge FP is the only company that does this mod right now.

running the .82

[MartinSTi05]

Originally Posted by D Money

ok awesome information!

so I can run the 1.06 exhaust housing and just send them whole turbo to get the hta compressor wheel?

Does Full-race kits already come with this wheel, or no?

OT, but Adam, which exhaust housing do you run?

FR kits do not come standard with HTA compressors.

[modaddict]

no wonder it makes more power. it flow's more air.


duh.

*secret sauce compressor wheel*

[STi_Guy04]

Great thread D Money, I was actually reading and thinking about this the last 2 days,

I`am sending out my 35r this weekend, I`am not sure what to do though... It`ll be like 450 for the new compressor housing, and another 350ish for the 1.06 turbine housing,
so with shipping and other cost i`am looking at 1000 dollars...

what do you guys think sell the gt35r .82 and just buy a brand new one?

[tino]

hmm do they make such a wheel for a GT40R turbo?? or is it only the 35R for now??

[dan avoN7]

I'm running the HTA 35R 1.06 and have been happy with it. Spools a bit quicker than the standard 35R but has alot better response inbetween shifts.

Not sure if they are making a wheel for the 40R but I know they are coming out with a HTA37R and they already have a HTA FP Green which someone posted pictures of on nasioc.

[tino]

Originally Posted by dan avoN7

I'm running the HTA 35R 1.06 and have been happy with it. Spools a bit quicker than the standard 35R but has alot better response inbetween shifts.

Not sure if they are making a wheel for the 40R but I know they are coming out with a HTA37R and they already have a HTA FP Green which someone posted pictures of on nasioc.

Id be defintately keen on the 40R wheel.. I wonder if they will sell the wheel separately??

[D Money]

Originally Posted by dan avoN7

I'm running the HTA 35R 1.06 and have been happy with it. Spools a bit quicker than the standard 35R but has alot better response inbetween shifts.

Not sure if they are making a wheel for the 40R but I know they are coming out with a HTA37R and they already have a HTA FP Green which someone posted pictures of on nasioc.

My buddy! lol

so this is the turbo you just got. I thought so, I couldn't remember, though.

Well you have the best knowledge so far, considering you've ran both. Would you suggest piecing it together or just buying a kit like UR or Full-race and sending the turbo to FP for the HTA compressor wheel and housing?

I know with just buying the turbo you'd have to get the elbow welded on like most of those kits already have done to accomidate the i/c piping.

Bump for more testing and information! Seems like this is the new way to go, almost as beneficial as the twin scroll setups as far as spool is concerned. Well atleast the graphs show....

[bugeyes]

I have sent a few emails asking if I could buy the HTA comp wheel separately but never got an answer.
It's not feasible for me to ship my turbo all the way to the US and back to Australia again.

I'd like to buy just the wheel and have it fitted locally.

[tino]

Originally Posted by bugeyes

I have sent a few emails asking if I could buy the HTA comp wheel separately but never got an answer.
It's not feasible for me to ship my turbo all the way to the US and back to Australia again.

I'd like to buy just the wheel and have it fitted locally.

agreed mate.. since im over in AUS also..

[Innovative Tuning]

It's a wheel AND a compressor housing, but I'm guessing they won't sell it as parts. I've had a couple here and the difference is very dramatic when you hold a standard GT35R next to it.

[D Money]

Originally Posted by Innovative Tuning

It's a wheel AND a compressor housing, but I'm guessing they won't sell it as parts. I've had a couple here and the difference is very dramatic when you hold a standard GT35R next to it.

Agreed, but for those who plan on running full-race and UR kits, they will not have the elbow piece welded onto the turbo since it seems that the housing is replaced along with the compressor wheel.

If someone were to buy the turbo from FP directly for $1,699 would it even mate up to one of the known rotated kits made for a subaru. I'm not to familair wth it, that's why I ask.

[subalou1]

Originally Posted by D Money

Agreed, but for those who plan on running full-race and UR kits, they will not have the elbow piece welded onto the turbo since it seems that the housing is replaced along with the compressor wheel.

If someone were to buy the turbo from FP directly for $1,699 would it even mate up to one of the known rotated kits made for a subaru. I'm not to familair wth it, that's why I ask.

You could put a silicon elbow on the turbo, I have a UR kit and my compressor housing does not have the elbow welded on.

[MartinSTi05]

Originally Posted by D Money

Agreed, but for those who plan on running full-race and UR kits, they will not have the elbow piece welded onto the turbo since it seems that the housing is replaced along with the compressor wheel.

If someone were to buy the turbo from FP directly for $1,699 would it even mate up to one of the known rotated kits made for a subaru. I'm not to familair wth it, that's why I ask.

The hotsise obviously would mate up. Also the oil and water would be identical. The only question would be the compressor housing, and how similar it is . I personally dont think that there would be any significant fitment issues.

[D Money]

Originally Posted by MartinSTi05

The hotsise obviously would mate up. Also the oil and water would be identical. The only question would be the compressor housing, and how similar it is . I personally dont think that there would be any significant fitment issues.

Yeah, the compressor housing might be the issue although it seems like it could be fixed either way.

Originally Posted by subalou1

You could put a silicon elbow on the turbo, I have a UR kit and my compressor housing does not have the elbow welded on.

Yes, but when you run their intercooler kits it routes the piping in a different way so it all mates up accordingly. I was also thinking that about a silcone coupler off the turbo to mate with the piping or just get the elbow welded on.

[MartinSTi05]

Originally Posted by D Money

Yeah, the compressor housing might be the issue although it seems like it could be fixed either way.



Yes, but when you run their intercooler kits it routes the piping in a different way so it all mates up accordingly. I was also thinking that about a silcone coupler off the turbo to mate with the piping or just get the elbow welded on.

If you think about it, the compressor inlet has to be on the same centerline as a standard GT35R, because all the elements that locate it remain unchanged. Also, the inlet is still 4" like a standard 35R. The only way the inlet could vary is far away from the compressor face of the CHRA. Additionally, you can clock the turbo however you want, and the only difference could be the radius of the housing, which couldn't be too different because it is based of a standard 35R CHRA. I see this fitting any existing kit that mounts a standard 35R.

[SeventySTi]

Noob question. Is 1.06 better than .82? I mean what are the different?

[MartinSTi05]

A 1.06 AR exhaust housing will have better power potential at the expense of boost threshold and transient response, while the .82 AR turbine housing will have less power potential, but a lower boost threshold and faster transient response.
Think of a small AR as holding your finger over a garden hose; the volume of flow goes down and back pressure goes up, however the velocity of the water increases. Whereas an unrestricted hose will flow more total volume with less back pressure and less velocity.

[blowbyu24]

pretty excited for all you 35r guys, that 1.06 with the better spool will be nasty!!

[D Money]

Originally Posted by MartinSTi05

A 1.06 AR exhaust housing will have better power potential at the expense of boost threshold and transient response, while the .82 AR turbine housing will have less power potential, but a lower boost threshold and faster transient response.
Think of a small AR as holding your finger over a garden hose; the volume of flow goes down and back pressure goes up, however the velocity of the water increases. Whereas an unrestricted hose will flow more total volume with less back pressure and less velocity.

You seem like a very knowledgable individual, so I ask you this.

As a guestimate, how many rpms of spool will one sacrafice with the 1.06 housing over the .82 housing? Also, how much more can one expect to make with the 1.06 housing versus the .82 housing?

I know you can't give me exact numbers, but just a general estimate would be great! I pretty much know just by reading and reading, I just wanted to get another opinion.