Single Turbo RX-7's Questions about all aspects of single turbo setups.

10500 RPM's

Old 02-25-10, 12:39 PM
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Question 10500 RPM's

Hello , been doing a bit of road tuning and data logging , I saw a couple logs hitting 10.5K , anyone else running this kind of rpm on their single turbo?
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Old 02-25-10, 02:26 PM
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wow, have you ever dynoed the car? i'm just curious what power the motor is making up there. actually wondering if it tapers off really, but i suppose port has a lot to do with that.
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Old 02-25-10, 02:48 PM
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i hit 10,300 but not often. it redlines @ 10k
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Old 02-25-10, 11:55 PM
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On my old setup i would leave at 10,500. Many passes that way.
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Old 02-26-10, 12:25 AM
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I know of some little hmong feller that would take his car to around 12,500, or so he said. It was a peri-ported 13b in an FD, with a huge semi turbo. I am dont recall the brand of the turbo, I just remember that it was huge and that the car had an insanely high idle. This was around 5-6 years ago when I was in high school. The car had two tachometers on the dash, both went to 8K but when the first maxxed out the second one would start where the last one stopped, so at 8k on the first tach and 4.5k on the second tach he knew to shift. He showed me videos of the car and it would run in the upper 9's in 1/4 mile. He had also bragged how the car had much more in it than that and could run deep in to the low 9's. It WAS quite the car until he cut and hacked it up to put a 2JZ into it only to run upper 12's.
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Old 02-26-10, 12:34 AM
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Wait for it...........
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Old 02-26-10, 01:15 AM
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Hahahaha
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Old 02-26-10, 08:28 AM
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Originally Posted by red_ricer View Post
I know of some little hmong feller that would take his car to around 12,500, or so he said. It was a peri-ported 13b in an FD, with a huge semi turbo. I am dont recall the brand of the turbo, I just remember that it was huge and that the car had an insanely high idle. This was around 5-6 years ago when I was in high school. The car had two tachometers on the dash, both went to 8K but when the first maxxed out the second one would start where the last one stopped, so at 8k on the first tach and 4.5k on the second tach he knew to shift. He showed me videos of the car and it would run in the upper 9's in 1/4 mile. He had also bragged how the car had much more in it than that and could run deep in to the low 9's. It WAS quite the car until he cut and hacked it up to put a 2JZ into it only to run upper 12's.
...WOW...
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Old 02-26-10, 11:56 AM
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I remember RR saying something about the ststionary gears becoming the "new" weak point at that RPM , any thaughts on this?
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Old 02-26-10, 12:11 PM
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Originally Posted by Marcel Burkett View Post
I remember RR saying something about the ststionary gears becoming the "new" weak point at that RPM , any thaughts on this?
Im not sure on that, but I'd think tip clearance from shaft flex would be the first.

Well of course also the flywheel coming off and taking your feet with it. That'd be my first concern Scatter shield FTW.
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Old 02-26-10, 08:42 PM
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Cant really tell you what was done internally, I dont know other than the disassmbled engines. Actually I cant even tell you for sure at 100% that the car did rev to 12.5K, I never witnissed it personally in the driver or passenger seat, instead I am taking the guys word for it because of how modified the car was and I didn't see a reason for him to make something up about his car. Also the hole 2 tachs thing and how the car just freakin screamed in the videos. Overall the car was, I don't want to say rough, but it was rough around the edges. You could tell the car was used basically for one thing and that was to go, and go fast in a straight line. I do know, however, that the car did have a diaper on the bell housing and gearbox, and that the flywheel has come lose on the e-shaft and wrecked the threads, keyway, and input shaft of the tranny. Luckily, he never did have to "test" the diaper and the flywheel came lose at a lower rpm, the rear end has blown up, broken transmissions, driveshafts, axles, and yes engines. Some of the housings he had laying around looked newer on the outside but the sealing surface had massive amounts of chatter, large spots of chrome missing, and rotors had apex seals that were crimped into their slot (probrably from the rotor making contact with the housing). Since then the car has gone way down hill. It now has a 2JZ and the car is cut to all hell. He cut the K-frame right down the center to lower the engine and keep the center of gravity down. Wires are hanging all over, some junk radiator in it, and of all things that damn k-frame being in two pieces. I didn't think that something could make usable power that high but the car had a very unique exhaust note when being revved and he was happy with it. I guess that is all that matters.....
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Old 02-26-10, 08:50 PM
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ive gone as high as 11,5k between shifts a few times
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Old 02-26-10, 11:48 PM
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I have a datalog at 13,700RPM and 17.1:1 AFRs hahahaha
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Old 02-27-10, 12:36 AM
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^damn....
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Old 02-27-10, 05:55 AM
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Originally Posted by 13B-RX3 View Post
I have a datalog at 13,700RPM and 17.1:1 AFRs hahahaha
Yeah but that's probably all you have from that motor..
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Old 02-27-10, 03:15 PM
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Exactly. The iron split from the 17.1:1 AFR and the oil cause the tires to spin causing the 13,700 RPM!!!
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Old 02-27-10, 04:15 PM
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Marcel: What kind of port and turbo are you running? How does it feel up that high? Engine seems stressed or the power delivery falls off?
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Old 02-27-10, 11:39 PM
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Who is tuning it? Raymond?
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Old 03-01-10, 08:05 AM
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Originally Posted by BluRR View Post
Marcel: What kind of port and turbo are you running? How does it feel up that high? Engine seems stressed or the power delivery falls off?
Semi pp with a GT45R . There is no fall off in power it just keeps pulling!




Originally Posted by RoTaRyBoYz View Post
Who is tuning it? Raymond?
No , I am. I wil be on the Dyno next week , have to fix two oil leaks first.
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Old 03-02-10, 12:58 AM
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Originally Posted by Marcel Burkett View Post

No , I am. I wil be on the Dyno next week , have to fix two oil leaks first.
Breds, is not to say that I have no faith in your ability to tune, but why don't you bring in a tuner to do the job? You've spent all that money & time to build it, so why not have it tuned by a professional so you can get the most out of it. Not only that, you also get the peace of mind that it was tuned by someone who knows what he's doing.

I don't trust Raymond around a hi HP rotary, neither do I trust Prentis because somehow I think his DD dyno has the wrong correction factor because his numbers don't add up sometimes.

Good luck
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Old 03-03-10, 03:23 PM
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Originally Posted by RoTaRyBoYz View Post
Breds, is not to say that I have no faith in your ability to tune, but why don't you bring in a tuner to do the job? You've spent all that money & time to build it, so why not have it tuned by a professional so you can get the most out of it. Not only that, you also get the peace of mind that it was tuned by someone who knows what he's doing.

I don't trust Raymond around a hi HP rotary, neither do I trust Prentis because somehow I think his DD dyno has the wrong correction factor because his numbers don't add up sometimes.

Good luck
Shawn Ready will be with me .
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