342 hp dyno & 11.19 @ 123.80 video
11-10-07, 04:29 AM
#51
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awesome car and awesome track results, however the trap speed just doesn't add up!
I make 321 to the wheels and I trapped @ 111. My best friends half-bride t-78(439whp) traps @ 124. I am calling bullshit on the dyno, you have to be making atleast 390ish.
I made 321 on 11 lbs, on 19 lbs I would say that you would be around 390. Like I said, congrats you car is great it just doesn't add up!
Jackson
I make 321 to the wheels and I trapped @ 111. My best friends half-bride t-78(439whp) traps @ 124. I am calling bullshit on the dyno, you have to be making atleast 390ish.
I made 321 on 11 lbs, on 19 lbs I would say that you would be around 390. Like I said, congrats you car is great it just doesn't add up!
Jackson
11-10-07, 06:48 AM
#53
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11-10-07, 12:51 PM
#54
I also thought the hp from the dyno was a lot lower than I expected, I wish it was more, I was expecting something like 380 based on what every was saying about needing at least 400 hp to break into the 10s. People don't try to claim less hp haha. 3 pulls on the dyno I did 342, 339 with water/meth injection, and then 341 without the inj.
I should get to a scanner so I can upload the dyno printout and timeslips, will try to today. I ran my past best 11.28 @ 122 weeks before I went to the dyno, I turned up the boost the same amount on the dyno as I have at the track, a week after the dyno I was running consistent 11.29-11.32 in 4 runs (that shows the driver must be pretty good to run that consistent in 4 runs), and I had the 11.19 where I must have drove perfectly as best I could, although I was .03 slower than my best ever 60ft all day. I've been getting 120-122 mph all year, just this past time at the track I jumped up to 123 mph and my best that day was 123.93, the lowest in 5 runs was 122.48
I should get to a scanner so I can upload the dyno printout and timeslips, will try to today. I ran my past best 11.28 @ 122 weeks before I went to the dyno, I turned up the boost the same amount on the dyno as I have at the track, a week after the dyno I was running consistent 11.29-11.32 in 4 runs (that shows the driver must be pretty good to run that consistent in 4 runs), and I had the 11.19 where I must have drove perfectly as best I could, although I was .03 slower than my best ever 60ft all day. I've been getting 120-122 mph all year, just this past time at the track I jumped up to 123 mph and my best that day was 123.93, the lowest in 5 runs was 122.48
11-10-07, 12:56 PM
#55
It was real cold late last night, and I was holding 21 psi doing a lot of 4th gear pulls on a highway with no other cars out, pump gas without water/meth, no problems for me of course. It felt pretty good but I also had two other little people in the car (they wanted to go for a fun ride) so it would have felt faster without the extra weight.
11-10-07, 01:07 PM
#56
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nice im hoping that i will have around 350 to the wheels when i get my car dyno'd in march.. if i can break the 11's ill be happy! until next winter that is when ill do something else ha ha!
11-10-07, 03:00 PM
#57
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Congrats on the times/terminals. I do have a very strong feeling that those are not the stock twins though. I tried everything to get more than 20psi out of BNRs non-seq and it just wouldn't happen. I could run over 20psi midrange, but it always tailed off top end, if you can get the turbos to hold boost with the seq restrictions then it would suggest they are not the factory twins.
Power wise I'd say the numbers are a little low given your terminals. I figured with 440rwhp I was looking at 128-130mph (depending on flat shifting) , a mate was running 110mph with 260rwhp (no flat shifting). I didn't run mine when I had 360rwhp, but estimated 118-120 and at 400rwhp it felt like 122-124mph. This would tie in with you having somewhere in the region of 400rwhp.
FWIW my car always lost power with water injection switched on as well - the larger the jet the more power it lost.
No matter what the dyno says you are doing something right
Power wise I'd say the numbers are a little low given your terminals. I figured with 440rwhp I was looking at 128-130mph (depending on flat shifting) , a mate was running 110mph with 260rwhp (no flat shifting). I didn't run mine when I had 360rwhp, but estimated 118-120 and at 400rwhp it felt like 122-124mph. This would tie in with you having somewhere in the region of 400rwhp.
FWIW my car always lost power with water injection switched on as well - the larger the jet the more power it lost.
No matter what the dyno says you are doing something right
11-10-07, 04:45 PM
#59
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i believe they are stock! i have heard about people getting different turbines or something installed in there stock twins to get more power also.. dunno how true it is tho..
11-10-07, 05:00 PM
#60
Below is a link to a picture. I have never removed the turbos for any reason, and I bought the car with a blow off valve and exhaust, so I'm sure they are the factory turbos without any mods to them. I was running high 14s when I got the car and first started drag racing it, I was also getting bad starts. Then after lots of practice and some mods I made it into the 13s, then 12s, and then 11s. The primary turbo only makes 13 psi max, until the 2nd turbo kicks in.
http://czfitnessproducts.com/tom94RX-7/new.jpg
http://czfitnessproducts.com/tom94RX-7/new.jpg
11-12-07, 04:24 PM
#61
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Awesome driving skills for sure. Unless your drag set-up is the magic combo. I would say the dyno is wrong. Pretty easy solution. Do a few highway pulls w/ a FD w/ similiar Hp. figures on stockers. To bad your not closer. HEHE. G
11-12-07, 04:56 PM
#62
My hoosier tires do help some, they get great traction and are light and not too tall like the 26" MTs that slowed me down. I don't think the dyno is wrong, there was a bunch of other cars on the dyno the same day, a neon srt put down 420 hp and his best 1/4 mile is 11.3, they said the dyno was working normal. I don't have any friends with RX7s, if anyone around wants to get together let me know. thanks.
Did you go non-seq and notice a hp increase?
Did you go non-seq and notice a hp increase?
11-12-07, 06:15 PM
#63
Eats, Sleeps, Dreams Rotary
over 15PSI, they make more heat than power. You don't get substantial gains from pushing your turbos beyond their peak efficiency, in fact you usually lose power(which may be another factory in why his power seems low). If you really want to push 19PSI, get BNRs, and make 420+hp.
tom....i will say your rwhp doesnt make alot of sense though given your trap speed. 123mph is more like 400 i would guess. do u think there is soemthing up with the dyno u were on?
11-12-07, 07:59 PM
#64
No I don't think there is something up with the dyno I was on, the guys there said it was working accurately, and the owners of the other cars getting on the dyno didn't talk much about it. The SRT4 did 420 hp, and he said he made 430 last time he was on it like weeks before that, so maybe it was reading 10 hp lower or his car was just not setup as good this time for what ever reason, probably had something to do with his car and his tune, he was running way too rich. It might be interesting to get on a dyno somewhere else and see what the results would be, but I don't feel like spending the money just for that.
I'd rather get on the highway with a 400hp RX7 and see what happens!
I'd rather get on the highway with a 400hp RX7 and see what happens!
11-13-07, 01:27 AM
#65
Those dynos can be altered very easily if your strapped on too tight or too loose it will read differently. Great job on the times but the power doesnt make sence I hade a completely stock motor with completely stock twins and bolt ons along with a crappy intercooler and made 322@12 lbs. Good job whatever your doing. Ever weighed your car at the track?
Chris
Chris
11-13-07, 07:40 AM
#66
Eats, Sleeps, Dreams Rotary
No I don't think there is something up with the dyno I was on, the guys there said it was working accurately, and the owners of the other cars getting on the dyno didn't talk much about it. The SRT4 did 420 hp, and he said he made 430 last time he was on it like weeks before that, so maybe it was reading 10 hp lower or his car was just not setup as good this time for what ever reason, probably had something to do with his car and his tune, he was running way too rich. It might be interesting to get on a dyno somewhere else and see what the results would be, but I don't feel like spending the money just for that.
I'd rather get on the highway with a 400hp RX7 and see what happens!
I'd rather get on the highway with a 400hp RX7 and see what happens!
11-13-07, 11:25 AM
#67
Those dynos can be altered very easily if your strapped on too tight or too loose it will read differently. Great job on the times but the power doesnt make sence I hade a completely stock motor with completely stock twins and bolt ons along with a crappy intercooler and made 322@12 lbs. Good job whatever your doing. Ever weighed your car at the track?
Chris
Chris
11-18-07, 01:11 AM
#69
Stay tuned...
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Anthony
11-19-07, 11:20 PM
#70
Congrats on the times! When I had the stock twins I also ran the exact same time 11.1 but at 122MPH. I was making 386HP to the wheels. I think the dyno was reading lower for whatever reason but at least you know by the MPH the car is closer to the 380-395 HP range.
Anthony
Anthony
2nd this. I ran the same trap speed back when I was around 400whp. Man you are cutting good 60 footers! What tires are you running?
11-19-07, 11:52 PM
#71
Thanks. Just 225x50x16 Hoosier drag radials on the stock rear wheels
I do believe the driving can contribute to higher than normal trap speeds, it doesn't just depend on the amount of hp. If you shift gears slower or get a slower launch, that doesn't help get you a high trap speed. The faster you do everything the whole way down the track, the faster your trap speed will be at the end!
Anytime I ran below 11.42 and faster than 122 it was around 50-60 degrees out, so the colder weather did help some, I was probably making a few more hp at the track that day, indoor dyno doesn't have the same cold air, it also wasn't warm in there though. But I was also trying to run a little more boost when it was colder out compared to when my previous best was 11.42 @121 in the recent past.
I do believe the driving can contribute to higher than normal trap speeds, it doesn't just depend on the amount of hp. If you shift gears slower or get a slower launch, that doesn't help get you a high trap speed. The faster you do everything the whole way down the track, the faster your trap speed will be at the end!
Anytime I ran below 11.42 and faster than 122 it was around 50-60 degrees out, so the colder weather did help some, I was probably making a few more hp at the track that day, indoor dyno doesn't have the same cold air, it also wasn't warm in there though. But I was also trying to run a little more boost when it was colder out compared to when my previous best was 11.42 @121 in the recent past.
11-20-07, 06:41 PM
#73
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i was at 340 rwhp in my car running non seq, and well i ran a 11.9 at 115mph i was running drag radials mt... i didnt heat them up as good as i should of but still you got to be making more than 343 at the wheels man.. you sloughtered my time..
ohh and mine was at 15psi on stock ports
i think i can squeeze out an 11.7 with my car once shes 100% healty again and with a good launch!
ohh and mine was at 15psi on stock ports
i think i can squeeze out an 11.7 with my car once shes 100% healty again and with a good launch!
11-20-07, 08:46 PM
#74
If you had my tires instead of those 26" MTs you would have went at least 3 mph faster, that's what happened when I went to the Hoosiers after using the same tires as you, they are too tall and they slow you down (changes the gearing). With a good launch, tires like mine, and more boost you could do a lot better, I remember when I was doing the same time and mph as you.
11-20-07, 08:54 PM
#75
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honestly? thats pretty cool. ill give it a try next year when i get my car back 100%, i dunno about me pushing more boost tho.. im quite happy with 15psi.. i just need to launch better.. im just scared of breaking the rear..