13.1 seconds@ 114.6mph
Thread Starter
Safety Car
Joined: Nov 2005
Posts: 3,961
Likes: 573
From: Lompoc, CA. Santa Barbara County
13.1 seconds@ 114.6mph
After autocrossing this weekend, I drove my car to work today. It was a beautiful day driving out to SLC6. So after my meetings, I took one of my favorite roads to meausure the cars performance, since I still had the rear tires down to 34psi, the 40lb woofer box and the t-tops in my garage. My best run was 13.1 seconds @ 114.6mph, still fighting traction problems and the fi not pulling above 5000rpm like the Q-jet did. I think with even less air in the rear tires, and remaping my fi above 4500 rpm, maybe I'll finally get this sucker into the 12s. If that doesn't do it, I have that LT4 Hot Cam and Performer RPM Air Gap I'm installing real soon.
12 second club wanna be.
Bee Jay
12 second club wanna be.
Bee Jay
Le Mans Master
Joined: Nov 2008
Posts: 5,691
Likes: 12
From: columbus oh
After autocrossing this weekend, I drove my car to work today. It was a beautiful day driving out to SLC6. So after my meetings, I took one of my favorite roads to meausure the cars performance, since I still had the rear tires down to 34psi, the 40lb woofer box and the t-tops in my garage. My best run was 13.1 seconds @ 114.6mph, still fighting traction problems and the fi not pulling above 5000rpm like the Q-jet did. I think with even less air in the rear tires, and remaping my fi above 4500 rpm, maybe I'll finally get this sucker into the 12s. If that doesn't do it, I have that LT4 Hot Cam and Performer RPM Air Gap I'm installing real soon.
12 second club wanna be.
Bee Jay
12 second club wanna be.
Bee Jay
Burning Brakes
Joined: Jan 2006
Posts: 761
Likes: 0
From: san jose California
wow, thats pretty good BJ..
how much is your engine pushing? i ran a 13.2 last time i went to the track with cooper cobras and no hard launching.
i want to get into the 12s with all motor, but i need to beef up my diff before i blow it up (its been acting up lately)
you have a really good trap speed.. i think mine was something like 103.. but i only got one good run in that day.. ill have to wait till spring to see what Shirley can really do
how much is your engine pushing? i ran a 13.2 last time i went to the track with cooper cobras and no hard launching.
i want to get into the 12s with all motor, but i need to beef up my diff before i blow it up (its been acting up lately)
you have a really good trap speed.. i think mine was something like 103.. but i only got one good run in that day.. ill have to wait till spring to see what Shirley can really do
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Race Director
Joined: Dec 1999
Posts: 19,610
Likes: 778
From: Forked River NJ
Instructor
Joined: Feb 2006
Posts: 240
Likes: 0
From: Allentown PA
With that mph, it sounds like you might be experiencing some traction problems...lol... I'd bet the farm you'd be in the mid 12's with a set of drag radials, and a lot easier than installing another cam. Or try lowering your current air pressure to around 14-16 psi. What's your 60' ft. times?
Thread Starter
Safety Car
Joined: Nov 2005
Posts: 3,961
Likes: 573
From: Lompoc, CA. Santa Barbara County
Bee Jay
Race Director
Joined: Jan 2003
Posts: 15,176
Likes: 88
From: State of Confusion
'Optimized', with gears, converter, slicks, etc., 114 MPH translates to mid-11s:
Bee Jay, the speed-trap is 66' long (1/80th-mile), not 60' (not that it really matters, just for your knowledge)
Very-impressive, Bee Jay!
Bee Jay, the speed-trap is 66' long (1/80th-mile), not 60' (not that it really matters, just for your knowledge)
Very-impressive, Bee Jay!
Pro
Joined: Sep 2009
Posts: 629
Likes: 6
From: columbus ms
problem is the transmission. 700r4 is not a great drag racing transmission. 1st is way to low and the gap between it and 2nd is rather large and will put your motor out of it's sweet spot if your not carefull. ask me how i know. hint: got one in my 67 camaro. i have 4.11 gears in it also. i have heard the firehawk indy 500's have alot better traction than the bfg. may want to try a rear tire swap. do some research on those tires.
Thread Starter
Safety Car
Joined: Nov 2005
Posts: 3,961
Likes: 573
From: Lompoc, CA. Santa Barbara County
problem is the transmission. 700r4 is not a great drag racing transmission. 1st is way to low and the gap between it and 2nd is rather large and will put your motor out of it's sweet spot if your not carefull. ask me how i know. hint: got one in my 67 camaro. i have 4.11 gears in it also. i have heard the firehawk indy 500's have alot better traction than the bfg. may want to try a rear tire swap. do some research on those tires.
Bee Jay
Pro
Joined: Sep 2009
Posts: 629
Likes: 6
From: columbus ms
i don't personally have those indy 500 tires, but from what i have read they are going on my 71 vette. they are supposed to handle and grip better than any other 15 " tires for our cars. even the guys on the cobra site recommend them (road racers) over everything else. the mickey thompson s/r got good reviews also. from personal experience, those bfg's don't grip worth a crap. checkem out, sounds like you need more traction not hp.
Thread Starter
Safety Car
Joined: Nov 2005
Posts: 3,961
Likes: 573
From: Lompoc, CA. Santa Barbara County
i don't personally have those indy 500 tires, but from what i have read they are going on my 71 vette. they are supposed to handle and grip better than any other 15 " tires for our cars. even the guys on the cobra site recommend them (road racers) over everything else. the mickey thompson s/r got good reviews also. from personal experience, those bfg's don't grip worth a crap. checkem out, sounds like you need more traction not hp.
Bee Jay
Drifting
Joined: Apr 2002
Posts: 1,743
Likes: 37
From: Stockton Ca
Almost There!
Bee Jay: I can't help but think that a little less throttle and a little more bite and Your There!
I also agree that trans is not helping.
How much grinding was required to get 275/50/17 on the front?
Yours is the model for my 74, mostly. lol
R
I also agree that trans is not helping.
How much grinding was required to get 275/50/17 on the front?
Yours is the model for my 74, mostly. lol
R
Thread Starter
Safety Car
Joined: Nov 2005
Posts: 3,961
Likes: 573
From: Lompoc, CA. Santa Barbara County
Bee Jay
Race Director
Joined: Jan 2003
Posts: 15,176
Likes: 88
From: State of Confusion
stage as shallow-as-possible, to maximize your rollout, and inflate your front tires as high a possible (unless you are adamant about getting into the 12s 'as-is'), to reduce rolling-resistence
I'm thinking you'd need to run 660' in 8.2 or-quicker to run 12's in the 1/4-mile