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500 rwhp goal: Which turbo???

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Old 02-26-02, 12:51 PM
  #51  
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Originally posted by Boostn7
Anthony(silver FD) from the T&R camp menaged to run 11.1 on stock turbos (non-seq), ported motor and Pettit "unlimited" ECU.....quite impressive!!! on the dyno he ripped 395(?) rwh with same setup...also witnessed that myself. Obviously those tiny turbos were screaming to ~19-20 and back down to 17-18psi !!!!!
My car made 350rwhp on 13psi and pump gas with non-sequentials, ported motor, and a Pettit ECU. I'm on the stock fuel system so I have tried higher boost yet. Actually, I spit an seal on the big end (175mph) a few weeks ago. I am about to get engine management, upgrade my fuel system, and rebuild my motor. I am hopeing to also be in the 390rwhp range on 17-18psi. Then maybe I'll be ready for a single turbo??
Old 02-27-02, 12:27 PM
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go supra with powerhouse raceing
Old 02-27-02, 04:42 PM
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Originally posted by zro_piston
...Also, what about the HKS T-51 Kai ball bearing?? Would it outperform the HKS/Garret GT3540?? I've heard many good things about the T-51, and this one is ball bearing, so lag would be less. But how do the two turbos compare? Thanks again!
-Pete
Really, the two turbo don't compare. Yes, the new T51 Kai BB will spool faster than the original T51...but not like the GT3540. The T51 BB is not a true dual ball bearing turbo like the Garrett unit, it has ball bearings on one side only (hot, I think) like the turbonetics units.

Here are a couple posts about the T51 from other members who have or have had this turbo on their cars.

Originally posted by Poweraxel
HAVING EXPERIENCE with this turbo on my car....
The car will not be streetable
The car wont be fun to drive in traffic

I suggest this turbo to only drag racers
Originally posted by rotaryextreme
The car is still streetable but it's not fast off the line unless you slip the clutch and get the RPM up there. For the boost pattern.

2k rpm: 0
3k rpm: 5 psi
4k rpm: 9 psi
5k rpm: 13 psi
above 5k: full boost in no time.

I have run 27 psi with the T51R kai turbo. When it's above 5k rpm, it will go to pretty much to any boost you want in less than a sec. My engine is mild street ported so it might spool up the turbo faster than a regular stock port motor.
I have the Garrett GT3540 unit...just not on my car yet, so ne real testing However, the guy I bought the turbo from showed me a video of this turbo on an RX3 drag car. This was a seriously ported and built motor, but nonetheless the boost patter was more like this.

2k rpm: 5 psi
3k rpm: full boost in no time.

But also, I know the T51 is capable of much higher boost levels. The Garrett units efficiency drops off after about 22-24 psi. Hope this helps.
Old 02-28-02, 06:56 PM
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GotBoostd7: thanks for the quotes and RPM/PSI estimates. By chance would anyone have RPM/PSI estimates for a T04R. And anyone know about the streetability on that turbo. Ball Bearing if ya have the info.
Old 02-28-02, 07:30 PM
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Thanks for your input GotBoostd7! Yeah, that GT3540 setup seems pretty nice. I plan on having an aggressive street port and I don't plan to run any more than 24 psi, even on race gas. Thanks for all your help! I think I shall go with the GT3540. I guess I'll use the HKS GT wastegate 60mm too. Now it's just time to find a manifold and downpipe maker....

-Pete
Old 02-28-02, 07:31 PM
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PM soulassasin. He's the only one I know of off hand that ran a T04R.
Old 02-28-02, 07:37 PM
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Originally posted by zro_piston
Thanks for your input GotBoostd7! Yeah, that GT3540 setup seems pretty nice. I plan on having an aggressive street port and I don't plan to run any more than 24 psi, even on race gas. Thanks for all your help! I think I shall go with the GT3540. I guess I'll use the HKS GT wastegate 60mm too. Now it's just time to find a manifold and downpipe maker....

-Pete
If you do really decide to go with the GT3540 please check out www.rpmperformancecentre.com.au The owners name is Tim Possingham and it's probably about the best deal you can get for these new Garrett units. I got mine for about $1600 shipped from Australia. (I'll post pics tonight when I get home) Expensive? Yes, but not compared to the US. Cheapest place I found in the US was Magnus and he wanted about $2k + shipping for the turbo. Also, Tim can make you a custom manifold too.
Old 02-28-02, 09:52 PM
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Who's Tim? And how much should a mani cost?
Old 02-28-02, 10:13 PM
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Originally posted by zro_piston
Who's Tim? And how much should a mani cost?
Tim is the owner of RPM Performance Centre. A stainless steel tubular manifold for an FD runs $780 AUD...or about $405 USD.
Old 02-28-02, 10:20 PM
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WOW!!! That's a damn good price! I love Aussies!
-Pete
Old 02-28-02, 10:26 PM
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To all this let me add some levity, humour, and suggestions

GT42

540 RWHP 24psi



two happy dudes below
Old 02-28-02, 10:37 PM
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the arm snagger

Last edited by magnus; 02-28-02 at 11:18 PM.
Old 02-28-02, 10:39 PM
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big damn hole

Last edited by magnus; 02-28-02 at 11:36 PM.
Old 02-28-02, 10:51 PM
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Wooooooodamn!!!!!

That GT42 is a ******* BEAST! Okay, who wants to buy my GT3540???

Old 02-28-02, 11:33 PM
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Ooooh Nice!

is that the 3540?

I thought it was the 35R

I feel a picture war!

we have that one on our talon,

http://www.magnusmotorsports.com/g-sus/purple3.jpg
http://www.magnusmotorsports.com/nicksengine

Ball bearing **** is the best!
Old 02-28-02, 11:41 PM
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Picture war huh....okay I'll give you what I got





That's all I have...for now Just got it today!!
Old 03-01-02, 02:52 PM
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Black680hp7 made 680 rwhp with a T66 Q with a 1.15 a/r @ 28 psi & C-16 fuel.

Here is the thread:
https://www.rx7club.com/forum/showth...threadid=38213
Old 03-01-02, 05:53 PM
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yup, thats the same turbo we have on the talon.

I maxed that thing out at 570 WHP on the Talon

IMHO its a wee bit small for a rotary, and that compressor is a 55lb/hr wheel

maxing out a turbo is rare, we got it to go to 11hp per lb, 10hp/lb is normally the max

But an awesome turbo nonetheless. It will be torquey as hell. And very fast boost response. On a rotary you want to go bigger compressor cause of the lower BSFC. I'm not sure if it can make the same power on a rotary, they like bigger exhaust housings.
Old 03-02-02, 10:08 AM
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Good gracious pete... lol... why didn't you tell me bout your new little project...


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