342 hp dyno & 11.19 @ 123.80 video
10-21-08, 09:29 AM
#127
^ Nope, shouldn't be a problem...I'm running my stock twins now @ 15 psi (non-seq) and I made 380 RWHP/315 RWTQ on a ported motor.
One thing I will say is that they've started to smoke a little bit from being pushed so hard, but that's ok...I'm planning on going single over the winter anyway.
One thing I will say is that they've started to smoke a little bit from being pushed so hard, but that's ok...I'm planning on going single over the winter anyway.
10-27-08, 02:02 AM
#128
Today I beat my best times, I ran a 11.16 ET @ 122.25mph with a 1.53 60ft!
My other 3 runs were good too..
11.20 ET 121.98 mph with a 1.56 60 ft
11.25 ET 121.62 mph with a 1.58 60 ft
11.32 ET 121.10 mph with a 1.55 60 ft
Last week my best was a 11.40 @ 121.00
This week I removed about 170 lbs! So all that weight loss got me down to 11.16 from a 11.40 last week which was my best time this year. I removed all the plastic panels/pieces in the car, the carpet, ABS, airbags, the 20lb greddy catback exhaust, radio, windshield wipers/motor, and a bunch of other little things, so the inside was all stripped down.
At the end of last year I ran 11.19 @ 123.80 with a 1.61 60ft. This year I put in 4.77 gears and added the 55lb rollbar, and got the 26" ET Streets instead of the 24.8" Hoosier drag radials. My best this year was 11.40 before I stripped out the interior and everything that made my car 170 lbs lighter which then helped me get down to 11.16. (same amount of boost as last year)
So I think my 4.77 gears are making my 1/4 mile times and mph worse rather than better, but the new gears and tires are helping me get better 60ft times and better 1/8 mile times. 3 of my runs today had better 1/8 mile times compared to my 1/8 mile time when I got the 11.19 last year.
My other 3 runs were good too..
11.20 ET 121.98 mph with a 1.56 60 ft
11.25 ET 121.62 mph with a 1.58 60 ft
11.32 ET 121.10 mph with a 1.55 60 ft
Last week my best was a 11.40 @ 121.00
This week I removed about 170 lbs! So all that weight loss got me down to 11.16 from a 11.40 last week which was my best time this year. I removed all the plastic panels/pieces in the car, the carpet, ABS, airbags, the 20lb greddy catback exhaust, radio, windshield wipers/motor, and a bunch of other little things, so the inside was all stripped down.
At the end of last year I ran 11.19 @ 123.80 with a 1.61 60ft. This year I put in 4.77 gears and added the 55lb rollbar, and got the 26" ET Streets instead of the 24.8" Hoosier drag radials. My best this year was 11.40 before I stripped out the interior and everything that made my car 170 lbs lighter which then helped me get down to 11.16. (same amount of boost as last year)
So I think my 4.77 gears are making my 1/4 mile times and mph worse rather than better, but the new gears and tires are helping me get better 60ft times and better 1/8 mile times. 3 of my runs today had better 1/8 mile times compared to my 1/8 mile time when I got the 11.19 last year.
Last edited by tom94RX-7; 10-27-08 at 02:07 AM.
11-20-08, 11:54 PM
#130
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an rx-7 that can handle such high boost with stock turbos and still hold such low horsepower and still be able to run quarter miles that low is very impressive, keep up the good work
11-21-08, 12:05 AM
#131
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those tires and your suspension setup must help alot. I have a T04z turbo pushing 425 @15 psi and I my fastest run was 12.7 @ 12.6psi, but I had stock susp and street tires. boost higher than that, i would just lose traction.
11-21-08, 02:10 AM
#132
The tires help alot, I don't know that the suspension really makes a big difference or not. But I'm sure I could still run 11's with street tires, maybe high 11's. My car doesn't lose traction at the track. (only in 1st gear on street tires on the street). I'm sure you would do much better with the ET streets and maybe some more practice.
11-21-08, 02:16 AM
#133
I'm gonna be putting on some full non-seq turbos, and putting my stock 4.10 gears back in, and then I think there will be a good chance I will finally get a 10.9 . I just recently put in 4.77 gears and they made my 1/4 mile times and mph worse. With a 55lb roll bar added and 4.77's, I could only do 11.40. Then my car lost about 170lbs and I did a 11.16. Last year my best was 11.19 without the roll bar and weight loss, and that was with smaller tires and a worse 60ft time.
11-22-08, 06:04 PM
#135
If you want to increase the output on the Twins under ultra high boost (IE Extreme Heat) you can use straight water injection into the turbos INTAKE.
The Air coming out of the Twins higher then 15psi is (don't have tests on this) over 250F so you can boil water at the 15psi. If you spray a SUPER FINE water mist into the turbos the extreme heat will turn the water into steam (And remove heat pre-IC). Water has a much higher density then air, so if you boil the water it releases its molecules into steam. This steam has a very high volume.
So you have just increased the output of the twins even thow the airflow out of the turbos really never changes
This is a idea that i have wanted to try sometime
The Air coming out of the Twins higher then 15psi is (don't have tests on this) over 250F so you can boil water at the 15psi. If you spray a SUPER FINE water mist into the turbos the extreme heat will turn the water into steam (And remove heat pre-IC). Water has a much higher density then air, so if you boil the water it releases its molecules into steam. This steam has a very high volume.
So you have just increased the output of the twins even thow the airflow out of the turbos really never changes
This is a idea that i have wanted to try sometime
11-24-08, 10:43 AM
#139
I can't afford to do a single turbo anytime soon, maybe someday.
Thanks for the idea about spraying water into the intake. I can't image intake air temps would be that high just from running a little more boost, my aits are low at the greddy elbow.
Not bnrs.
My 1/8th when I did 11.16 was 7.12 @ 94.54mph. Last year I was going a few mph faster at the 1.8th with the 4.10s, but with the 4.77s I am switching into 4th gear right before the 1.8th.
Thanks for the idea about spraying water into the intake. I can't image intake air temps would be that high just from running a little more boost, my aits are low at the greddy elbow.
Not bnrs.
My 1/8th when I did 11.16 was 7.12 @ 94.54mph. Last year I was going a few mph faster at the 1.8th with the 4.10s, but with the 4.77s I am switching into 4th gear right before the 1.8th.
11-25-08, 12:42 AM
#143
No. But I'm pretty sure no other RX7s with stock seq. twins and stock ported motor with 15 psi or less has come very close to 123 mph or 11.16 in the 1/4 mile, I think it's the additional boost for the most part that gives me these results.
11-27-08, 11:04 AM
#147
No offense, but maybe you should be running faster also, I dynoed at 343 and usually between 121-123.8 mph
I'm hoping to make more than 343 when I install my fulll non-seq turbos soon, and I'll be faster in the 1/4 mile of 123.8 last year cause my car is lighter now and adding the non-seq turbos (and I got the 4.10s back in now which are faster at the end of the track).
12-07-08, 11:23 PM
#150
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You are one hell of a driver!!
