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GT35/40 true potential (dyno sheets)

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Old Jul 9, 2003 | 07:50 PM
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From: lebanon
GT35/40 true potential (dyno sheets)

Want to know what this turbo can do ? What pressure ratios required to deliver what performance.

I have searched and not found any sheets over 420rwhp SAE ?

Are there any others that people have and not posted ? If you have them please give it up & list your set up as tested (as many parameters as you know), asking to finally establish fact from fiction.
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Old Jul 9, 2003 | 08:12 PM
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Would be nice to see... NO one has pushed one yet it seems. Im willing to bet that you'll need close to 30 psi to hit the 500hp mark with this turbo. (if possible at all)

I'll be setting one up in a 3rd gen later this summer and i'll be sure to post some results.

Until then there should be someone else who can test this turbo?

Last edited by enzo250; Jul 9, 2003 at 08:17 PM.
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Old Jul 10, 2003 | 03:08 AM
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You just had a yellow supra put down 563whp at the AutoSalon in Adelaide over the weekend.Thousands witnessed it. I'm not sure of all the details, I do know it ran stock block with the small .82 housing at 30lbs, Microtech MTX12, but I'm sure Hot4's will print the results.

-Sean
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Old Jul 10, 2003 | 05:27 AM
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From: lebanon
Originally posted by Zero R
You just had a yellow supra put down 563whp at the AutoSalon in Adelaide over the weekend.Thousands witnessed it. I'm not sure of all the details, I do know it ran stock block with the small .82 housing at 30lbs, Microtech MTX12, but I'm sure Hot4's will print the results.

-Sean
Bro thats nice power, but I should have been a bit more clear ? I would like to know what it will do on a rotary, in particular a 13B

There are claims here of 500rwhp @ 20psi or around that figure so thats what we hope to see someone post
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Old Jul 10, 2003 | 09:54 AM
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True it's not on a 13B, but 563whp on a .82 exhaust does show potential.

-Sean
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Old Jul 10, 2003 | 11:04 AM
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Originally posted by RICE RACING
Bro thats nice power, but I should have been a bit more clear ? I would like to know what it will do on a rotary, in particular a 13B

There are claims here of 500rwhp @ 20psi or around that figure so thats what we hope to see someone post
I don't think someone has said they made 500whp@20psi but I do think people have said that 500whp is attainable.

-Sean
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Old Jul 10, 2003 | 01:17 PM
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30 PSI on a stock 2J. I'm sure the engine was happy about that! Only in Australia. I see the you guys do the wildest ****... anyways.

I am a big fan of the 35/40 but 500hp on this turbine is not at ALL natural on a rotary... It is a fast spooler that makes REALLY nice power compared to the other turbines that spool just as fast. Just leave it at that.

I'm sure you can make 500 with it but why would you want to? Unsafe boost levels with lots of back pressure... Why? To say that I made 500 when I blew my engine on the dyno?

You might concider a T51R KAI BB and be done with it if 500+ is the end in mind for you.
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Old Jul 10, 2003 | 03:36 PM
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Here ya go Peter. This was at 20 psi. Now shaddup about it!





Last edited by Marshall; Jul 10, 2003 at 03:46 PM.
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Old Jul 10, 2003 | 03:50 PM
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Best post ever.
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Old Jul 10, 2003 | 03:51 PM
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imma have to call this one! lol
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Old Jul 10, 2003 | 04:20 PM
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Old Jul 10, 2003 | 04:53 PM
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I've posted this before. I put down 470 rwhp at 20 psi. I have the gt 35/40 with the 1.06 a/r. This was on a weak motor with questionable porting and tuning. The motor held together for a while untill it blew at 10 psi either from the negative timing split in my map or from a brittle 2ndary injector connector comming loose. At 15-16 psi I made 430 rwhp with the same motor. I have since rebuilt the motor myself, with much larger and cleaner ports, and have an excellent tuner. I didn't have a chance to get it on a dyno, but at 16 psi it felt like it was making 450 to the ground. I then unfortunately got a bad tank of gas, and broke all three seals on the front rotor. I rebuilt it again, porting the exhaust even larger. I just finished breaking in the new motor, and am going to have it tuned soon. This motor feels alot stronger already, and is pulling 15-16 inches of vacuum at idle where as the previous one only pulled about 13-14. I am confident that I will be able to make 500 rwhp at 20 psi with this setup.
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Old Jul 10, 2003 | 05:25 PM
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What are the temps in fort worth in december? Ask the dyno operator to do an SAE run next time. Good numbers though, best I've seen. assuming it was 40 ish degrees thats a solid 445rwhp SAE dyno. Good job, Carl
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Old Jul 10, 2003 | 05:33 PM
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Temps ranged from 32-57 that day, so assuming the clock on the dyno is right, it was in the 50s when you ran, so I'd say 455-460, again nice work, Carl
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Old Jul 10, 2003 | 05:35 PM
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Originally posted by in2twins
thats a solid 445rwhp SAE dyno. Good job
...I was going to say the same, though those are very nice numbers nonetheless.
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Old Jul 10, 2003 | 05:53 PM
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Originally posted by MaTT_FoULk
Best post ever.
Touche !

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Old Jul 10, 2003 | 07:01 PM
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Originally posted by Rotary Experiment Seven
I've posted this before. I put down 470 rwhp at 20 psi. I have the gt 35/40 with the 1.06 a/r. This was on a weak motor with questionable porting and tuning. The motor held together for a while untill it blew at 10 psi either from the negative timing split in my map or from a brittle 2ndary injector connector comming loose. At 15-16 psi I made 430 rwhp with the same motor. I have since rebuilt the motor myself, with much larger and cleaner ports, and have an excellent tuner. I didn't have a chance to get it on a dyno, but at 16 psi it felt like it was making 450 to the ground. I then unfortunately got a bad tank of gas, and broke all three seals on the front rotor. I rebuilt it again, porting the exhaust even larger. I just finished breaking in the new motor, and am going to have it tuned soon. This motor feels alot stronger already, and is pulling 15-16 inches of vacuum at idle where as the previous one only pulled about 13-14. I am confident that I will be able to make 500 rwhp at 20 psi with this setup.
damn, you blew a motor, rebuilt it blew it again, and rebuilt it again? man you must have a money tree in your backyard. how were the housings after you broke the three seals? any damage to the turbo on either the first or second time you blew the motor? were you able to reuse some of the gaskets and seals on your last rebuild, since (i assume) you hadn't used the motor all too long before it blew.
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Old Jul 10, 2003 | 07:25 PM
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So there we have it, 470hp on 20psi.

Do you believe yet what people have been saying for months??
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Old Jul 10, 2003 | 07:49 PM
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Originally posted by AJC13B
So there we have it, 470hp on 20psi.

Do you believe yet what people have been saying for months??
That is a good result Excellent result more like it ....... and a credit regarless of the engine problems (we all have them!)

MORE MORE MORE I am greedy !
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Old Jul 10, 2003 | 09:01 PM
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RE7, what computer do you have? Next time I'm up in FW I'm gonna have to take a look at your car and get a ride in it. I'll be picking up my 7 next week (As long as insurance isn't being a pain in the ***), and this is the kit I'm looking at. Who up there do you have tuning your car?

Blake
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Old Jul 10, 2003 | 10:22 PM
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Originally posted by infinitebass
RE7, what computer do you have? Next time I'm up in FW I'm gonna have to take a look at your car and get a ride in it. I'll be picking up my 7 next week (As long as insurance isn't being a pain in the ***), and this is the kit I'm looking at. Who up there do you have tuning your car?

Blake
Something tells me it's a A'PEXi PFC and Steve Kan. RE7, please feel free to correct me if I'm wrong.
I really don't see a reason why this turbo can't put down 500 rwhp. 500 at 20 psi or lower seems like a lost cause, but I don't think it should have any problems at 22+ psi.
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Old Jul 11, 2003 | 01:05 AM
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Originally posted by the_glass_man
I really don't see a reason why this turbo can't put down 500 rwhp. 500 at 20 psi or lower seems like a lost cause, but I don't think it should have any problems at 22+ psi.
Unless it chokes on the exhaust side. How big is a T3 flange anyways?
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Old Jul 11, 2003 | 07:21 AM
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Thats kinda what I was after in the last thread that got closed down, the sizing of the wheels on the papers I have would have a hard time getting near 450 rwhp let alone crossing 500.. The venerable to4b 60-1 looks to have better potential on paper than the gt 3540.. Unless the numbers I have are wrong, if so, who has them?
I have found through accidental comparison that the exhaust side of the turbo has more of effect on power on a rotary than does changes in the compressor side.
I found out my T04e is a 57 trim, which when compared to another guys S5 to4b hybrid is similar in compressor flow numbers, almost identical in fact, yet my exhaust side being 1.15 p-trim wheel is alot larger than the the s5 exhaust housing, the difference was 100 rwhp...Backpressure makes or breaks the turbo IMHO...Max
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Old Jul 12, 2003 | 06:06 AM
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Originally posted by infinitebass
RE7, what computer do you have? Next time I'm up in FW I'm gonna have to take a look at your car and get a ride in it. I'll be picking up my 7 next week (As long as insurance isn't being a pain in the ***), and this is the kit I'm looking at. Who up there do you have tuning your car?

Blake
Sure, stop on by the shop in Haltom City. You can find our phone number and address at www.GothamRacing.com .

I drove it back in NJ right after it dyno'd, and it was pretty damn fast to say the least. 4th gear was especially insane......I'll never forget the look on Ihor's face when I revved out first, and second, and third, and fourth, and then punched it in 5th. I don't think he thought I was going to let off. When I did at around 155 or so, she lit up the night sky on highway 287 with this huge, bright fireball .

One thing I will say---by seat of the pants driving, with the BNRs my R1 feels just as fast as Ihor's FD in first, second, and third gear. After that it's no contest, though.

Oh, and Samuel L. Jackson is 100% correct---Power FC and Kan.
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Old Jul 12, 2003 | 10:25 AM
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Originally posted by Maxthe7man
Thats kinda what I was after in the last thread that got closed down, the sizing of the wheels on the papers I have would have a hard time getting near 450 rwhp let alone crossing 500.. The venerable to4b 60-1 looks to have better potential on paper than the gt 3540.. Unless the numbers I have are wrong, if so, who has them?
I have found through accidental comparison that the exhaust side of the turbo has more of effect on power on a rotary than does changes in the compressor side.
I found out my T04e is a 57 trim, which when compared to another guys S5 to4b hybrid is similar in compressor flow numbers, almost identical in fact, yet my exhaust side being 1.15 p-trim wheel is alot larger than the the s5 exhaust housing, the difference was 100 rwhp...Backpressure makes or breaks the turbo IMHO...Max
Your numbers sound correct to me! 20psi for 470rwhp is sick. 15psi for 460rwhp on a TO4S/60-1 w/AR 1.00 P-trim is alot more likable to me. I'd like to hear some exhaust temps for the damn 35/40 rotary chokers. All 35/40 is is a TO4R compressor side w/ball bearings and an exhaust side made for a 2L piston motor, read way to f@cking small for a rotary. No wonder the damn thing spools so fast. I can't wait until some of you have to get these turbos rebuilt. Can you tell I really hate 35/40's? The only thing 35/40's are good for on a rotary is TWINS!!!!!!!!
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