Expected ET Time?
05-05-10, 04:50 PM
#1
Expected ET Time?
I'm pretty much a road coarse only guy but one of the mechanics is a drag guy. Anyway, I told him I'd come down one day when I have the car fully tuned. We were stalking about times and I said I should be able to do mid 11's or better going off what I've seen here. For some reason he's really doubtfull and gives me funny looks lol. He knows what power and making and has done a lot of work on my car.
Anyway, what can I expect out of my setup. This is what I got...
Large streeport
Precision Billet 6765 with a 1.0 divided a/r
M&W CDI
280 treadwear street tires (265)
OS Giken 1.5way LSD with stock 4.1 rear-end
stock tranny
I think thats all that matters. So obviously I've never been to the track so I'm not going to be doing the best times and will be taking it easy on the stock tranny (i have spares so not worried about that). Anyway, running my setup at 20-23 psi making 500 rwhp (conservative I think) on pump Sunoco 94 with water injection. What should I expect for a noob run and what could be done with a good driver.
thewird
Anyway, what can I expect out of my setup. This is what I got...
Large streeport
Precision Billet 6765 with a 1.0 divided a/r
M&W CDI
280 treadwear street tires (265)
OS Giken 1.5way LSD with stock 4.1 rear-end
stock tranny
I think thats all that matters. So obviously I've never been to the track so I'm not going to be doing the best times and will be taking it easy on the stock tranny (i have spares so not worried about that). Anyway, running my setup at 20-23 psi making 500 rwhp (conservative I think) on pump Sunoco 94 with water injection. What should I expect for a noob run and what could be done with a good driver.
thewird
05-05-10, 05:03 PM
#2
No Traction
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Im no expert, but i hit a 12.3 with under 300wrp on street tires(225s) .. 91 octane original stock motor and twins @11.5lbs of boost. And i had high intake temps on a 80F day.
You should be able to hit low 11s or high 10s once you can launch the car.
You should be able to hit low 11s or high 10s once you can launch the car.
05-05-10, 07:28 PM
#5
what kind of power did it make? I would say no mid 11's not that the car isnt capable but if you arent there to drive it hard its not going to happen. 60 foot is everything so you launch on radials soft out of the hole, there goes +1.
I have seen many 5-600+rwhp cars go 12's-13's but at 130+mph...
I have seen many 5-600+rwhp cars go 12's-13's but at 130+mph...
05-05-10, 08:01 PM
#6
ughhhh... get your tires nice and warm..start launching the car at 6ish see what it does. dont slip the clutch a **** ton....after the launch just bang some gears and youll be fine. my friend just started racing. he never rode in a turbo car or drove one. i just built him a 600whhp daily driver lol...he has no clue were to begin when he hits the gas lmao
05-05-10, 08:34 PM
#7
I guess I'll just go there and see what happens when the car is ready. I was just trying to see what I should expect since my buddy eyes me down lol. I'm not worried about banging through the gears, I do that a shiton at the track ^_^. I guess the only real deal is the launch since I never launch the car that way. I did launch the car once when I did a time attack restart and it went smooth enough. Shouldn't be a problem either meh.
I guess I'll leave it for the end of the season just in case I break anything serious, I'll have all winter to worry about it.
On a side note, if I have solid diff mounts, do I have to worry about any bracing?
thewird
I guess I'll leave it for the end of the season just in case I break anything serious, I'll have all winter to worry about it.
On a side note, if I have solid diff mounts, do I have to worry about any bracing?
thewird
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05-06-10, 06:07 AM
#11
Only gonna be running the street tires mentioned. Don't want to get serious into it, just go there once do a few runs and get my best time type of thing. I was considering bringing my Hoosier R6 slicks though. I guess that would help?
Sure, I'll update when I do it but have no eta yet. If anything maybe in June as long as I don't break my current transmission on some track days coming up. Which would mean I'd use up my spare tranny.
thewird
Sure, I'll update when I do it but have no eta yet. If anything maybe in June as long as I don't break my current transmission on some track days coming up. Which would mean I'd use up my spare tranny.
thewird
05-06-10, 08:39 AM
#12
pushing s##t up hill
as far as launching goes, id try holding up the handbrake and letting the clutch out a tiny bit to load up the driveline and squat the rear a tiny bit.
Then rev it to anywhere around 8g and just slip/drop handbrake and you will be fine, dont think anything would break in a hurry just as long as you don't do a clutch dump launch style
With that combo you have it should, should do a 11 sec time day in day out, but every car/driver is different , keep us updated
Then rev it to anywhere around 8g and just slip/drop handbrake and you will be fine, dont think anything would break in a hurry just as long as you don't do a clutch dump launch style
With that combo you have it should, should do a 11 sec time day in day out, but every car/driver is different , keep us updated
05-06-10, 10:31 PM
#15
Will work for horsepower
I have to agree ive seen 500hp on good street tires and high 11's or low 12's was what it does without et's and suspension.
Plus road race suspension defeats drag launches.
Dont mean to be a dick but i think with your set up thats good times!
Plus road race suspension defeats drag launches.
Dont mean to be a dick but i think with your set up thats good times!
05-07-10, 07:19 AM
#16
. Your not being a dick, I rather people be honest anyway about what to expect anyway.thewird
05-08-10, 02:17 AM
#19
Eats, Sleeps, Dreams Rotary
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True enough, I forgot to mention suspension in the first post. My rear springs are 1000 pounds (18k) so I guess thats pretty terrible for a launch but they are amazing for cornering . Your not being a dick, I rather people be honest anyway about what to expect anyway.
thewird
. Your not being a dick, I rather people be honest anyway about what to expect anyway.thewird
09-20-10, 01:59 AM
#20
Ok, so I finally ended up going and the funniest thing happened. So my first run I was thinking ok do a light launch at 4k using the clutch to go and such. I ended up doing a 12.3 with a 0.99x second reaction time. So then I thought to myself, great the car can do 11's easy if my reaction time isn't terrabad. So go again and rev up to 5k dropping the clutch, end up with a 12.8 and a 0.6xx reaction time. 3rd run, try 5.5k RPM and did even worse, 13.5 with a 0.3xx reaction time. And the final 4th run, 6k RPM and did a 13.6 with a 0.088 reaction time!
Ok, so I got my reaction time down but my ET got worse. Explanation is simple now that I thought about it. Basically when I drop the clutch car has no torque so the tires don't spin and it just drops down to idle almost (track was prepped) and then crawls and eventually builds boost and goes. When I did the first run, I actually used the clutch a little to go so the turbo was loaded a bit before the clutch was released.
Anyway, pretty satisfied with the my very first run since in my mind its an 11 considering the 1 second reaction time. I know the car can definitely do an 11.3 just based on that and most likely better if you read below.... I actually think 10's are within range once I fix my boost problem and ain't worried about burning the clutch to load up the turbo on a launch.
On a side note, my car was overboosting due to (finally diagnosed it as the wastegate failing) to 22-24 psi when I had it only tuned up to 19-20 psi. Because of this, it entered my "safe area" so it was running silly rich (10.2-10.5 AFR) and retarded timing of around 5-6 degrees. I highly doubt I was making more power despite the boost so I was probably in the ~450 rwhp range if I had to guess. It definitely didn't feel any faster then normal.
thewird
Ok, so I got my reaction time down but my ET got worse. Explanation is simple now that I thought about it. Basically when I drop the clutch car has no torque so the tires don't spin and it just drops down to idle almost (track was prepped) and then crawls and eventually builds boost and goes. When I did the first run, I actually used the clutch a little to go so the turbo was loaded a bit before the clutch was released.
Anyway, pretty satisfied with the my very first run since in my mind its an 11 considering the 1 second reaction time. I know the car can definitely do an 11.3 just based on that and most likely better if you read below.... I actually think 10's are within range once I fix my boost problem and ain't worried about burning the clutch to load up the turbo on a launch.
On a side note, my car was overboosting due to (finally diagnosed it as the wastegate failing) to 22-24 psi when I had it only tuned up to 19-20 psi. Because of this, it entered my "safe area" so it was running silly rich (10.2-10.5 AFR) and retarded timing of around 5-6 degrees. I highly doubt I was making more power despite the boost so I was probably in the ~450 rwhp range if I had to guess. It definitely didn't feel any faster then normal.
thewird
09-20-10, 02:09 AM
#21
Reaction time has nothing to do with your E/T. The clock starts when you actually leave the line and stops when you cross the traps. Doesnt matter if you cut a perfect light or sit there for 3 minutes, your E/T remains the same. What were your trap speeds? Thats a bit more indicative of what you car could be capable of.
09-20-10, 05:15 AM
#22
supra7
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Yea what he said ^^^^ just work on coming out of the hole with boost and no bog. Practice on the street until you get it down, then go to the track and it will be much easier
09-20-10, 08:08 AM
#24
May as welll just post this... Also, I was told later that having my lights up and my wing down (99 spec) is robing some mph. No idea how much though. And then they started talking about running skinny tires up front, etc etc. Mine is the one on the left, the one on the right was a stock RX-7.
Well, that is the weird thing cause on the street the tires spin when launched like that and 1st-2nd continue spinning until shifted into 3rd, and even 3rd might be a little twitchy depending on the road. At the track, my car just hops across the pavement in 1st-2nd, I was so confused lol.
thewird
thewird
09-20-10, 09:16 AM
#25
Work on your 60' times (launch), you can drop at least 2/10ths off that and your E/T. Other than that, your time isnt too bad at all for your trap speed. Id say you could go 11.7ish on steet tires darn near 10s with some E/T streets. Though I will say 118mph traps doesnt seem like a ~450WHP FD. Were you spinning alot in any gear other than 1st or did you have to ease off at all? I trapped ~113mph with stock twins at 13psi and a Pettit ECU, probably making just a tick over 300whp.