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Next ??? Best TURBO FOR ROADRACE

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Old 06-12-03, 10:41 PM
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Next ??? Best TURBO FOR ROADRACE

Hello Gents,'


Looks like the other thread went pretty well. Now I'm having second thoughts about what turbo to run. What would you guys suggest.

Quick spool, I got plenty of rubber 335/30/18 in rear. So please advice a good balance. This FC will be running Super Function Endless suspension and Braking system.

Thanks, Rishie
Old 06-12-03, 10:43 PM
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OH YA.

WIDEBODY FC. 13 BT.

PEace.
Old 06-12-03, 11:01 PM
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T51

http://www.mazdarotaryclub.com/forum...1&referrerid=1

See videos !

Last edited by RICE RACING; 06-12-03 at 11:05 PM.
Old 06-12-03, 11:56 PM
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Rishie, I am planning on 335-30-17s on 17x12 CCWs with a 5-3/4 backspace. Have you finished your body kit? Do you think the 335s will clear in my configuration? We need to get you(tripoint/?), me(tripoint/GTC), and the third guy(forget his name) with the FC2000/tripoint together for a photo. Maybe sevenstock? I am going to try a T66 Q trim, if it does not work, I will put it on my 97T Supra. Later, Carl
Old 06-13-03, 01:35 AM
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I'm happy with my roadrace car running a gt35/40bb. I have tried t78 and unless its a big open track its too laggy
Old 06-13-03, 05:28 AM
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if it's a pure track only, road course only car, I think you can get away with bigger than a GT35/40. Try the t51R or the T04R/S/X or you might be able to get away with the T78 depending on tuning and other characteristics of your car
Old 06-13-03, 11:40 AM
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There is a T51R KAI for sale on Supra forums for 700.00! Won't last! Check the for sale section, you must be registered to view that section I believe. the seller is well known on that forum, Carl
Now let's see who has ***** as big as Peters
Old 06-13-03, 02:54 PM
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My concern is that I won't be able to keep the 35/40 or larger turbo in peak efficiency range when exiting corners. Therefore I assumed I would need a smaller turbo.

Any thoughts???

Thanks, Rishie

Who has the Tripoint FC2K combination?? THat's what I am doing. i'd like to speak with this gent to ask who did the body work and how he molded it together.

Thanks, Rishie
Old 06-13-03, 03:19 PM
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Smaller is better IMO. John Eplie (sp?) has one of the fastest track FDs going and he runs the apexi kit. Big turbos are for bragging rights and dyno queens. On the track you're not going to run 20psi because your water temps will go through the roof in short order without a serious cooling system upgrade (ie custom fabricated griffin rad, sealed ect-even then I think 20 is extreme). At 15psi you're barely getting into the efficiency range of the turbos people are suggesting and sacraficing valuable low end that is necessary to boot the car out of corners.
Old 06-13-03, 04:16 PM
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Rishie, do you have the Tri-Point kit also, and if so are you sure you can fit 335's on 18's in there. I know what Carl plans on running will work since that is what Tri-Point told me if I recall correctly and is what I plan on running also. That was me with the fc2000/TPE widebody combo. I'll be at sevenstock but not with the 20b car as it is a long ways from being done. Guess I'll have to settle for the drive down in my TII vert conversion...if that is done.

Last edited by RX-Heven; 06-13-03 at 04:20 PM.
Old 06-13-03, 04:21 PM
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Smaller is better IMO. John Eplie (sp?) has one of the fastest track FDs going and he runs the apexi kit. Big turbos are for bragging rights and dyno queens. On the track you're not going to run 20psi because your water temps will go through the roof in short order without a serious cooling system upgrade (ie custom fabricated griffin rad, sealed ect-even then I think 20 is extreme). At 15psi you're barely getting into the efficiency range of the turbos people are suggesting and sacraficing valuable low end that is necessary to boot the car out of corners.
I think bigger (with limitations) is better imo. You honestly dont' need a turbo with low end power that spools at 3k on the racetrack considering you're always around 5-8000rpms anyways. It's therefore better to have a turbo with a lot of high end power and one with more power potential than a smaller one. Would I recommend someone get something monstrously huge? Probably not. But for pure track I would get something bigger than a GT35/40. BTW, Peter Farrel runs a T04S on his racecar and he's won lots of IMSA races with it
Old 06-13-03, 04:25 PM
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Rishie, I'm not sure of his name, I will go through my emails, and see if I can find it. He is in SF. I know he's doing a 20B, so I'd try that forum. He said it cost him 3500 just for the front flares, and moulding the FC2K. I am having the GTC done for a fraction of that by a friend, depending on how it comes out, I will see if he wants to do another when he is done with mine. Also that guys shop had the car for six months, mine should be 30 days start to finish. I'll take my T66 vs an RX6 at
T'hill in a heart beat, see ya when you get there
It's all about driving style, and the ability to put the power down. I run my Supra TT turbos in Parallel which means I get a 250RWHP bump from 4000-5000 rpm, with no power(160rwhp) below 4000 rpm at all, and a 7000 redline. I autocross this car regularly, and beat most of the FDs by a fair margin. If you can learn to drive so you are staying in the boost with a bigger turbo, you will be able to walk away from everyone on the straights, and stay with them in the turns. IMHO of course, Carl Byck
BTW I have a custom Griffin/AST set-up, and I am switching to an oil cooled turbo which will drop my water temps even further(195@ 20psi on a TO4S after 20 minutes on the track) Also the T66 should make a bit less heat, and more power at a given boost level than the TO4S. I have done alot of cooling mods, and they are required, but worth it, to make this all work.
Old 06-13-03, 04:28 PM
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Rishie, come to think of it, the guy that sold me my TPE kit had 18s on his car, he was limited to 295s due to the 18" wheels. He was running 18x12 Kinesis wheels out back, and it was tight.
Old 06-13-03, 04:30 PM
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Dave, please correct my story on your project if I have mis-stated it.
Old 06-13-03, 04:36 PM
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Im kinda partial to my t-66 dbb.

-Chris
Old 06-13-03, 04:52 PM
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CCarlisi,
I just ran at Mosport and Mont Tremblant with John Eppley (we are great friends with VERY similar cars and engine builders). My T78 at 11psi would pull John very slightly on every straightaway. One session of cat and mouse at Mosport had us both grinning ear to ear. Anyway, the T78 doesn't lag at all between 4200 and 8200 rpm, it just pulls like a freight train.
Old 06-13-03, 04:58 PM
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As a clarification, I am switching from a TO4S to a T66 Qtrim(thus the two turbos in my post) Carl
Old 06-13-03, 05:24 PM
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I have to second that bigger is better, to a point.

The T78 is perfect for track unless you are below 4-5k rpm in 2nd coming out of very low speed corners. Otherwise you should be in the fat part of the power curve everywhere on a raod course. Most huge turbos mentioned on the Forum provide full boost by 4-5k rpm with little or no lag issues shifting at the top of the power band, any such turbos should be fine for track and with lower backpressure the motor should be much more willing to accept the abuse.
Old 06-13-03, 05:26 PM
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I dug up my receipt and I found out I paid $1950 for the install of the front/ rear flares and the rear lip sploiler. That was labor only. Also, I had the TPE lower front bumper attached with dsuz fasteners (Like Chitos red 20b) since that was what I wanted originally. Since then I've gotten the fc2000 kit and it has yet to be installed. Since it has larger openings and eliminates the pop-up h-lights. Car is still unpainted.
Acually they had it for 7 months but that is 'mostly' my fault...
You also remember that guy with the beautiful silver vert couldn't run 335 (295's barely) on 18's with the TPE kit.
Old 06-14-03, 01:05 AM
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Jun, owns the silver vert, he cannot run larger than 295s due to the 18s, that is who sold me my kit. Carl
Old 06-14-03, 02:53 AM
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Here's Rishie's car. 335/30/18's.
Old 06-14-03, 02:58 PM
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I have the tires on there right now but am getting them built out some more, the wheels that is. They are a lil thin for what the tire is. I will run a 18,10 with a 285/30 front or 275/35.

I'm getting an extra set of Work Termist S1C wheels I had special ordered in offsets for the Tripoint Kit. So Carl if you need some 18's for a real good price for show or street let me know.

Who makes a 30 series 335 in 17" diameter?

Thanks, Rishie
Old 06-14-03, 03:00 PM
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I've taken measurements for total spacing and so forth. The tire should fit. I mean I have them on there right now. But the wheel is only a 10.5, soon to be a 12.

WE shall see,

Rishie
Old 06-14-03, 03:02 PM
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Things to look at:

Will run an event every 6 weeks at least. So that's maybe 10 a year. Should I get a turbo that can be rebuilt. All things considered what should I get.

Sounds like the 35/40 would work fine. We will definitely be in the higher rpm ranges. i haven't been to button or willow so i don't know them. But thunder and laguna, this thing should be in the higher rpms most of the time.

Thanks, Rishie
Old 06-14-03, 04:00 PM
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Rishie, I am about to order CCWs for around 1800.00 delivered, I want 10s in front and 12s in back. I am open to any ideas you have, as well as a better deal on wheels. I was thinking of the BBS 3 piece Grand Am wheels, but those are 2200.00. Nice thing on those is a 17x10 weighs 15lbs! Thats compared to around 22lbs on the CCW, I believe. I still think a bigger torbo will not disapoint, you will always be in boost on the roadcourse, and you will just walk away from 996TTs, and ZO6s with the bigger turbo. If you get a moment, call me on my cell at 707-696-2705, and we will talk wheels. Carl


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