View Poll Results: Which kit is best in your opinion?
Basic 35R turbo kit
5
3.57%
HTA35R turbo kit
58
41.43%
TwinScroll 35R turbo kit
13
9.29%
TwinScroll HTA35r turbo kit
64
45.71%
Voters: 140. You may not vote on this poll
Which 35R setup is the best? Three Different Shops, Three different answers.
Evolving Member
Joined: Apr 2004
Posts: 344
Likes: 0
From: san antonio
Until we see a twin scroll HTA35R or regular 35r like Evodan has put down some serious trap times then I would pick the single scroll HTA a la AMS and Buschur if your goal is street monster and weekend warrior drag car. But to get the full potential like we see in the recent Bushcur pump gas videos, you need to hand over a blank check to Mr. Buschur and expect to spend between 20-25k for the real deal.
I really want to see a car like Evodans built to it's full potential to see what it can really do at 35psi plus. He had great results with his TS 30r. To Evodan and the other person who said they didn't prefer the HTA with TS, why is that? It's only there to improve low and midrange torque so why would that hamper a 35r twin scroll setup, wouldn't it theoretically just make it even better with spool and torque? With the Buschur cars trapping so high and his RS HTA35 trapping 150+, besides it being more expensive what could be a negative? Is there something I'm missing.
I really want to see a car like Evodans built to it's full potential to see what it can really do at 35psi plus. He had great results with his TS 30r. To Evodan and the other person who said they didn't prefer the HTA with TS, why is that? It's only there to improve low and midrange torque so why would that hamper a 35r twin scroll setup, wouldn't it theoretically just make it even better with spool and torque? With the Buschur cars trapping so high and his RS HTA35 trapping 150+, besides it being more expensive what could be a negative? Is there something I'm missing.
Last edited by bolio; May 5, 2008 at 09:59 PM.
I completely agree. I'm only starting out with supporting mods to make sure I'm not short of any AIR, FUEL, or SPARK. Ported heads and double pumper fuel pumps, cams....etc can all come later. Not too many people on here have the money to go ***** out all at once, besides...what's the fun in that? hahaha
So many topics on HTA but no one really explained what an HTA turbo really is?? What are its mechanical differences compared to non HTA turbo.
Example, twin scroll is called that because it has 2 exhaust ports. Dual ball bearing turbos get their name for having the ball bearing setup... So what the hell is HTA?
Oh and to get back on topic:
Import Junky I agree with your thinking, I'd much rather reduce lag even if it still makes the same power.
Example, twin scroll is called that because it has 2 exhaust ports. Dual ball bearing turbos get their name for having the ball bearing setup... So what the hell is HTA?
Oh and to get back on topic:
Import Junky I agree with your thinking, I'd much rather reduce lag even if it still makes the same power.
Here's some info posted on Forced Performance's website. Now I'm sure David Buschur wouldn't let them post about him if it wasn't legit.
Our FP GT3582HTA turbocharger is very similar the to the standard GT3582R Garrett turbocharger in overall size and footprint, but that is where the similarities end and your new found power begins. It comes with a 4" inlet and 2.5" outlet anti-surge ported compressor housing. This new and improved style of anti-surge port provides a longer and more gentle bell mouth guide for the air all the way down to the inducer tips. The standard turbine housing is the T31 housing in 2.5" outlet for compact installation applications such as 4G63. Other turbine housings styles are available.
Repeated dyno testing and thousands of miles of street punishment have shown how much faster spooling the HTA is compared to the normal 35R. Midrange and bottom end torque which are usually dismal in regular .82 A/R GT35r kit cars are DRAMATICALLY improved with HTA compressor technology!
Repeated dyno testing and thousands of miles of street punishment have shown how much faster spooling the HTA is compared to the normal 35R. Midrange and bottom end torque which are usually dismal in regular .82 A/R GT35r kit cars are DRAMATICALLY improved with HTA compressor technology!
we will refit it with our 82mm HTA compressor wheel and advanced ported shroud cover and perform a CHRA balance after assembly to ensure PERFECT balance and max turbo RPM.
The dyno graph of David Buschurs 2.0l 4G63 EVO8 shows a test performed on the same car with ZERO changes other than the turbocharger swap. Both pulls are in the 38-40psi range. The regular 35R could not spool up as fast or hold boost quite as well as the HTA. At first we were stunned by the difference. So stunned that we put the Garrett GT3582R back on the test car to see if the power dropped back to pre-HTA levels. It did, power dropped down to exactly the same level as before. The HTA went back on and BAM! the power and spool came right back. This story repeated itself on car after car during testing.
If you always wanted a 35R on your car, but just could not stand the thought of all that lag - then you have found the answer to your troubles. At 4800rpm the FP3582HTA delivers a 50ft-lb torque increase over the standard Garrett 35R.
If you always wanted a 35R on your car, but just could not stand the thought of all that lag - then you have found the answer to your troubles. At 4800rpm the FP3582HTA delivers a 50ft-lb torque increase over the standard Garrett 35R.
Last edited by Import Junky; May 5, 2008 at 10:14 PM.
This was stated by AMS earlier in a thread when they decided to sell HTA's. There's also a dynograph on thier site to show the difference.
http://www.amsperformance.com/store/...oducts_id=1893
http://www.amsperformance.com/store/...oducts_id=1893
Martin has done some independent testing of the Forced Performance HTA35R and was very pleased with the results. Quicker spool and it made a little bit more peak power.
Last edited by Import Junky; May 5, 2008 at 10:26 PM.
For people wondering about which housing heres a few words from David Buschur, hope he doesn't mind posting this since he's already posted.
I haven't tested back to back on the .63 and .82 housings. All the housings I've tested over the last month were .82 or larger. I'd compare logs from different cars but that is never a good fair comparison. I will guess though based on what I have seen over the last month of extensive testing on the larger housings. I would have to guess the .63 on a 2 liter is going to make 20 psi around 200 rpm sooner.
I know the next question is going to be how much more power does the .82 make, unfortuneately I cannot answer that with any accuracy. Part of me says none, part of me says up to 20 whp.
I tested the 1.06 housing. The car made more top end power with less boost than it ever had before. BUT the midrange was not good, the losses in torque were not worth the trade off for ME.
I know the next question is going to be how much more power does the .82 make, unfortuneately I cannot answer that with any accuracy. Part of me says none, part of me says up to 20 whp.
I tested the 1.06 housing. The car made more top end power with less boost than it ever had before. BUT the midrange was not good, the losses in torque were not worth the trade off for ME.
The standard housing is the .63 5 bolt housing. It works extremely well and is what we most recommend.
Last edited by Import Junky; May 6, 2008 at 05:15 AM.
This is a post from Ted B
As you can see from my profile, I already have a T4 TS T4Z BB.
What size turbine housing you want depends on how much power you realistically intend to make. If you want to use 93 octane exclusively, the .84 might be good. For E85, methanol injection and such, a 1.00 would fare better. If you're going to use VP import, 45 psi, and take it out and beat on it at the track, you probably want a 1.15.
My first go-round was with a .70. It's a little too small for all out peak power, but it makes what my 35R single scroll did on pump at 25 psi, AND the difference is that with the TS, the car responds like it has an FP Green.
What size turbine housing you want depends on how much power you realistically intend to make. If you want to use 93 octane exclusively, the .84 might be good. For E85, methanol injection and such, a 1.00 would fare better. If you're going to use VP import, 45 psi, and take it out and beat on it at the track, you probably want a 1.15.
My first go-round was with a .70. It's a little too small for all out peak power, but it makes what my 35R single scroll did on pump at 25 psi, AND the difference is that with the TS, the car responds like it has an FP Green.
Heres a post from AMS on their thoughts of the .63 housing.
We use our .63 A/R housing that we tested to make as much HP as the .82 garrett housing but spool quicker. Its the best of both worlds.
ETS Twin Scroll HTA35r setup is more than a turbo kit. I would hang that **** on my walls or put it on my dining table (if I wasn't 19 and didn't live with my parents). I can not give you any hard facts as I know Tom just made one for a customer quite recently and I'm not sure it has been dyno'd. In theory, it should spool up a few hundred RPM's faster because of the Twin Scroll setup and then a few hundred RPM's faster because of the HTA'd turbo. There are some dyno pulls that show a GT35r vs HTA35r and the HTA has been shown to spool quicker and produce more top-end WHP.
I am a little crazy about waiting and I get home from school in a week and I couldn't wait the month for an HTA35r, so I just ordered the BoostLogic SC61 DBB Kit through ICS, which is on super sale right now. It is a gorgeous looking kit and if you know what a Supra is you know BoostLogic is awesome.
A turbo kit is a big decision, so you have to find what you want. If your going with a GT35r and you have the money there is no reason not to get the Twin Scroll HTA35r. There are no disadvantages to that setup except price. Happy Boosting!
I am a little crazy about waiting and I get home from school in a week and I couldn't wait the month for an HTA35r, so I just ordered the BoostLogic SC61 DBB Kit through ICS, which is on super sale right now. It is a gorgeous looking kit and if you know what a Supra is you know BoostLogic is awesome.
A turbo kit is a big decision, so you have to find what you want. If your going with a GT35r and you have the money there is no reason not to get the Twin Scroll HTA35r. There are no disadvantages to that setup except price. Happy Boosting!
yeah their kit is pretty nice too. equal length, ramhorn style, and it comes with everything basicly. need me to link you to it? one of the guy just recently introduce boostlogic into EVOM, and they said there going to start making more parts for the evo :thumbup