I just ran my MR2 in Englishtown

[Need2Speed]

Hey all I just ran my 2 at english town, and I surprised alot of people.. also this was my first time running on a track. I ran three cars, (1) a gutted out civic in which i ran a 13.5 (2) a stock 2002 corvette in which i messed up on my launch and he beat me by 1/10 of a sec. ran low 14's (3) a turbo charged civic, where i also messed up on my launch but still beat him and ran low 14's..
I expected to run low 13's and possibly high 12's but I kept on messing up my launch. Does anybody know what i can do to remedy this so next time at the track I can get into the 12's.

[JekylandHyde]

Low 14s to high 12s is a huge jump.

You are going to need at least 50 more horsepower at the wheels with near perfect driving.
(figure another 70-80HP out of the engine).

What were your 60' times?
What are your mods.

My entire track history with Hyde is here:
http://jekylandhyde.madpowaz.com/slips.htm

That may give you some idea of what it takes to get into the 12s ... and 11s.

[rollhard]

Originally Posted by JekylandHyde

Low 14s to high 12s is a huge jump.


That may give you some idea of what it takes to get into the 12s ... and 11s.

Its a huge jump, but not really if you F up your launch. In my eclipse i have gone from mid 12s to 15s! all from messing up on my launch. Thats when i first starting going to the track. A little bit of practice and the launches come more naturally. =)

[JekylandHyde]

Good point.

I just searched and his dyno thread claims he made 261 HP which should be enough to get in the 12s with proper driving.

His initial post in here is missing the crucial information: mph and 60' time.
They tell us a lot more about his car's potential than the actual ET number.

[rollhard]

261whp in a stock car with only intake and exhuast is insane. My car back in the day made 232whp with intake, exhaust, avcr, afc. Hey hyde, what tranny are you running on your car?

[JekylandHyde]

I have a recently rebuilt 93 LSD tranny, TRD motor mounts, SPEC stage 3 4-puck race clutch and a resurfaced OEM flywheel ... 255/16's BFG drag radials ... that is about it for getting power to the ground.

[rollhard]

yeah my 92 tranny died the last time i went to the track. im trying to find a reman 93 tranny for cheap or i might as well get a brand new one from toyota for $1700. i can still drive it but it wont shift passed 4k rpm. I have tried to run in the stock 14" wheels and ill tell you its the craziest feeling. you can pull some insane trap speeds. haha.

[JekylandHyde]

Rim size only affects trap speed by their weight ... the over diameter of rim+tire does affect trap speed.

A smaller overall diameter results in lower trap speeds, faster acceleration, but a lot less gearing.

Stock overall diamter is around 24" ... ideally for drag racing, you want to be around 26" or so. This is gives you more gearing and a higher mph.

I gained over 2 mph by switching from 24" to 26.5"

[rollhard]

Originally Posted by JekylandHyde

Rim size only affects trap speed by their weight ... the over diameter of rim+tire does affect trap speed.

A smaller overall diameter results in lower trap speeds, faster acceleration, but a lot less gearing.

Stock overall diamter is around 24" ... ideally for drag racing, you want to be around 26" or so. This is gives you more gearing and a higher mph.

I gained over 2 mph by switching from 24" to 26.5"

the stockers i have, have some gigantic bubble tires. but i see what you are saying. i have a set of the 14s, 15s, 16s, and 17s for my mr2 and i think im going to get rid of everything and get a set of 16x10 w/ 16x9s

[JekylandHyde]

I am using 255 drag radials on a 16X7 ... yes, you can use them on a rim that narrow

You are probably wise getting a 16X9 .. just be careful of fitment issues with big tires

[Need2Speed]

Yeah sorry for leaving that stuff out. right now I can only find the time slip with the vette.
r/t - .541
60'- 2.338
330 - 6.092
1/8 - 9.192
mph - 80.34
1000 - 11.845
1/4 - 14.111
mph - 99.44

off the launch at this run my friends said it looked like I stalled out and then went.

[JekylandHyde]

A few things...

*Your mph should be higher for 260 rwhp.
This could be because yo uare making good power on a small turbo.
260rwhp with a bigger turbo would have netted better mph & times.
Did you race at the same boost level you dynoed at?
What rpm were you shifting at?
You need to be trapping at least 104 mph to touch the 12s with perfect driving.

*Your 60' time needs improvement.
It sounds like you lagged off the line - probably need to launch at a higher rpm.
If you would hit a 1.9 - 2.0 in the 60' (which is a "good" MR2 launch), you would have run a 13.3-13.5 easily.

Compare yourself here:
http://www.mr2ownersclub.com/quartermile/

Look at cars with similar mph and great 60' times ... that will give you an idea of your potential.

[Need2Speed]

I have a limiter so i was shifting at 6k rpms. and yes i raced at the same boost that i dyno'd at..

[JekylandHyde]

Are you on the CT26 or the CT20b turbo?
If you were on the ct26 you were shifting late.

What kind of limiter are you refering to? (fuel, rpm ,mph or boost)

[Need2Speed]

rpm limiter
and i have the ct26 turbo..
if I was shifting too late then when should I have shifted?