RX-7 Single Turbo Dragged!
04-12-05, 12:06 AM
#1
RX-7 Single Turbo Dragged!
Sorry Joe, had to post it
My cobra against a 94 RX-7. The Mazda had a GR-63 single turbo, big street port, power fc, front mount, fuel system, full exhaust, etc. The first run was from a 3nd gear roll. I immidiately got a car on him as I heard him spooling, then slowly pulled a 2nd car length though 4th gear. I shut down because of traffic up ahead. We slowed down and waited for a clearning, and this time went from a 2nd gear punch. Same result, except this time I shot ahead and put even more distance on him as I slammed 3rd. I stayed on the gas into 5th. Seamed to have 2-3 cars on him at that point. We pulled over and talked for a bit. Apparently his boost controller was acting up and he was only getting about 12 psi boost. When he tried to switch it it dropped to 7 psi. I had to get some more gas as I was running below a 1/4 tank. He addjusted his boost controller to 16 psi and we went on the highway again. We had decided to do 3rd gear pulls, so we lined up again and went. I pulled ahead immediately as he spooled, but this time I gained ground a bit slower due to the higher boost he was running. By 4th I had a full car ahead when we shut down. The highway was begining to get a little crowded so we went to another road that was alot less cluttered. We did another 3rd gear punch. I waited for a sec and let him spool. As I heard his twin wastegates open I floored it and stayed side by side for a second, then managed to pull ahead through 4th gear. I decided to stay on it longer this time and wound out 4th and got a bit into 5th. I shut down at around 140. I had about 1 1/2 to 2 cars at this point, was hard to tell. Anyway, fun night and good races. Hope you have a safe trip home.
My cobra against a 94 RX-7. The Mazda had a GR-63 single turbo, big street port, power fc, front mount, fuel system, full exhaust, etc. The first run was from a 3nd gear roll. I immidiately got a car on him as I heard him spooling, then slowly pulled a 2nd car length though 4th gear. I shut down because of traffic up ahead. We slowed down and waited for a clearning, and this time went from a 2nd gear punch. Same result, except this time I shot ahead and put even more distance on him as I slammed 3rd. I stayed on the gas into 5th. Seamed to have 2-3 cars on him at that point. We pulled over and talked for a bit. Apparently his boost controller was acting up and he was only getting about 12 psi boost. When he tried to switch it it dropped to 7 psi. I had to get some more gas as I was running below a 1/4 tank. He addjusted his boost controller to 16 psi and we went on the highway again. We had decided to do 3rd gear pulls, so we lined up again and went. I pulled ahead immediately as he spooled, but this time I gained ground a bit slower due to the higher boost he was running. By 4th I had a full car ahead when we shut down. The highway was begining to get a little crowded so we went to another road that was alot less cluttered. We did another 3rd gear punch. I waited for a sec and let him spool. As I heard his twin wastegates open I floored it and stayed side by side for a second, then managed to pull ahead through 4th gear. I decided to stay on it longer this time and wound out 4th and got a bit into 5th. I shut down at around 140. I had about 1 1/2 to 2 cars at this point, was hard to tell. Anyway, fun night and good races. Hope you have a safe trip home.
04-12-05, 01:15 AM
#6
Eats, Sleeps, Dreams Rotary
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Well one thing for starters, he had to spool? He should have been brake boosting, 2nd you would probably have won regardless but maybe a car with 440 to the wheels would give you a better run. Good job regardless, the superchargers always get the jump.
04-12-05, 01:23 AM
#7
I forgot what the gearing is like in the rx-7 but I know its shorter than in my cobra. I was at about 3500 rpm in 3rd gear when we punched it. I let him spool up a few times before I hit it but it didn't seam to make a difference.
Last edited by IRPerformance; 04-12-05 at 01:27 AM.
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04-12-05, 08:07 AM
#9
Eats, Sleeps, Dreams Rotary
Originally Posted by Fatman0203
Well one thing for starters, he had to spool? He should have been brake boosting, 2nd you would probably have won regardless but maybe a car with 440 to the wheels would give you a better run. Good job regardless, the superchargers always get the jump.
04-12-05, 08:42 AM
#10
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Originally Posted by Fatman0203
Well one thing for starters, he had to spool? He should have been brake boosting, 2nd you would probably have won regardless but maybe a car with 440 to the wheels would give you a better run. Good job regardless, the superchargers always get the jump.
04-12-05, 09:33 AM
#12
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Good job Ihor. I would like to race you this week sometime as soon as I pick my car up from RP, I dyoned at 512 and 390 tq but numbers dont mean anything. Hit me up on the pm , I see you are local
04-12-05, 04:36 PM
#16
Eats, Sleeps, Dreams Rotary
Ihor, you car must be over 500rwhp by now...right? Since i dynoed at 380 I pulled on an 04 cobra that dynoed at 475rwhp.......But didn't pull on him a whole lot. Maybe 3-4 cars. Maybe because he had 2 friends in there and it was just me...No joke, the (modded) cobras are fast...Have you took yours to the drag yet?
Dave
P.S. Get out of our rotary forum you ******* trator!
Dave
P.S. Get out of our rotary forum you ******* trator!
Last edited by apneablue; 04-12-05 at 04:38 PM.
04-12-05, 05:54 PM
#17
I dunno. I changed my tune a little, but it was mostly in the mid range. Up top I actually took out some timing but leaned it out a tiny bit. I haven't been to a dyno since January when I put down the 496 and haven't done anything else to the car except brakes. I'm not an expert driver, but I feel I can speed shift this car pretty well. Alot of cobras are running around with poor tunes and alot of people can't drive. With your ball bearing 35/40 you should spool a bit faster than the gr63, so maybe you're not letting them jump on you initially. BTW, I'm mainly on here to waste time and contribute my knowledge from time to time
04-12-05, 08:12 PM
#19
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Im rather surprised you didnt pull him alot harder putting down those kinds of numbers. A guy I know has an 03 cobra that just put down around 500 whp, and Im probably going to have to race him this spring. His dyno sheet is absolutly incredible, theres hardly a curve, just a couple horizontal straight lines 
Looks like I might have a chance if I can get about 450 whp.
Looks like I might have a chance if I can get about 450 whp.
04-12-05, 08:13 PM
#20
Eats, Sleeps, Dreams Rotary
Originally Posted by Rotary Experiment Seven
......BTW, I'm mainly on here to waste time and contribute my knowledge from time to time
Tell him David Lee says hey.
04-12-05, 08:25 PM
#22
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Originally Posted by DelSlow
Im rather surprised you didnt pull him alot harder putting down those kinds of numbers. A guy I know has an 03 cobra that just put down around 500 whp, and Im probably going to have to race him this spring. His dyno sheet is absolutly incredible, theres hardly a curve, just a couple horizontal straight lines Looks like I might have a chance if I can get about 450 whp.
Looks like I might have a chance if I can get about 450 whp.
04-13-05, 12:44 AM
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Originally Posted by Rotary Experiment Seven
Sorry Joe, had to post it My cobra against a 94 RX-7. The Mazda had a GR-63 single turbo, big street port, power fc, front mount, fuel system, full exhaust, etc. The first run was from a 3nd gear roll. I immidiately got a car on him as I heard him spooling, then slowly pulled a 2nd car length though 4th gear. I shut down because of traffic up ahead. We slowed down and waited for a clearning, and this time went from a 2nd gear punch. Same result, except this time I shot ahead and put even more distance on him as I slammed 3rd. I stayed on the gas into 5th. Seamed to have 2-3 cars on him at that point. We pulled over and talked for a bit. Apparently his boost controller was acting up and he was only getting about 12 psi boost. When he tried to switch it it dropped to 7 psi. I had to get some more gas as I was running below a 1/4 tank. He addjusted his boost controller to 16 psi and we went on the highway again. We had decided to do 3rd gear pulls, so we lined up again and went. I pulled ahead immediately as he spooled, but this time I gained ground a bit slower due to the higher boost he was running. By 4th I had a full car ahead when we shut down. The highway was begining to get a little crowded so we went to another road that was alot less cluttered. We did another 3rd gear punch. I waited for a sec and let him spool. As I heard his twin wastegates open I floored it and stayed side by side for a second, then managed to pull ahead through 4th gear. I decided to stay on it longer this time and wound out 4th and got a bit into 5th. I shut down at around 140. I had about 1 1/2 to 2 cars at this point, was hard to tell. Anyway, fun night and good races. Hope you have a safe trip home.
My cobra against a 94 RX-7. The Mazda had a GR-63 single turbo, big street port, power fc, front mount, fuel system, full exhaust, etc. The first run was from a 3nd gear roll. I immidiately got a car on him as I heard him spooling, then slowly pulled a 2nd car length though 4th gear. I shut down because of traffic up ahead. We slowed down and waited for a clearning, and this time went from a 2nd gear punch. Same result, except this time I shot ahead and put even more distance on him as I slammed 3rd. I stayed on the gas into 5th. Seamed to have 2-3 cars on him at that point. We pulled over and talked for a bit. Apparently his boost controller was acting up and he was only getting about 12 psi boost. When he tried to switch it it dropped to 7 psi. I had to get some more gas as I was running below a 1/4 tank. He addjusted his boost controller to 16 psi and we went on the highway again. We had decided to do 3rd gear pulls, so we lined up again and went. I pulled ahead immediately as he spooled, but this time I gained ground a bit slower due to the higher boost he was running. By 4th I had a full car ahead when we shut down. The highway was begining to get a little crowded so we went to another road that was alot less cluttered. We did another 3rd gear punch. I waited for a sec and let him spool. As I heard his twin wastegates open I floored it and stayed side by side for a second, then managed to pull ahead through 4th gear. I decided to stay on it longer this time and wound out 4th and got a bit into 5th. I shut down at around 140. I had about 1 1/2 to 2 cars at this point, was hard to tell. Anyway, fun night and good races. Hope you have a safe trip home.
04-13-05, 12:47 AM
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Originally Posted by DrewS2k
take video ihor and call me i definately want to see this oh hey man my cuz got his ss out if you still want to run him. Call me or pm me drew