Need help getting to running a 7.0 1/8th mile

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Need help getting to running a 7.0 1/8th mile

Post  85bigblockfox on January 2nd 2013, 3:53 pm

All right I found a class I want to run this year. Its the 7.0 class. My car is a 85 mustang with a 466 2443 trw pistons, c9 heads with cj valves also ported with roller rocker, stock rods( stress riser has been removed and shot peened), crank, solid roller .630 is the lift cant remember the duration vic intake 1050 dominator. c6 transmission with ati 3500 converter. 9in in the back with 3.70 gears and moser guts. On the chassis dyno it made 450 to the tire at 6500 still climbing and 422lf lbs. The car did weigh 3480 race ready. It ran 11.40s at 121-3 mph and 7.37 at 96mph with a 1.78 60ft. Im trying to get some weight out of it. Race seats, sound mat etc. I am real leary of spraying this motor because of the stock rods. But I put a cheater plate on it but havent used it. I know the car dont 60ft like it should and the converter is really tight. I have a 4.22 gear I could put in it to see if it would leave better. Or is a 50 shot or so the only way to get a 6.90 - 7.0 out of it without tearing it apart?
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Re: Need help getting to running a 7.0 1/8th mile

Post  bbf-falcon on January 2nd 2013, 4:15 pm

With a little tweeking it should'nt be too hard w/o nos imo. start out by eleminating weight.

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Re: Need help getting to running a 7.0 1/8th mile

Post  maverick on January 2nd 2013, 4:27 pm

Yep. Weight loss is cheap. The 60 ft. is pretty lazy, so ignoring the snug converter, I'd guess weight loss and gearing will get you there. Does this thing see any street duty?
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Re: Need help getting to running a 7.0 1/8th mile

Post  Tommyj466 on January 2nd 2013, 4:30 pm

I think you should get there with what you have pretty easily. I think there is a ton to be gained in 60 foot. Is it spinning? What convertor is in it? At 96 MPH in the 1/8, I think it should 60 in the 1.50's.

Like Rick said, get some more weight off of it, decent convertor, and the lower gear and you're there. IMO convertor and a good hook most important.

TJ
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Re: Need help getting to running a 7.0 1/8th mile

Post  richter69 on January 2nd 2013, 4:36 pm

put a good conv in it or stick the 4.22 gear in w what u got...........
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Re: Need help getting to running a 7.0 1/8th mile

Post  maverick on January 2nd 2013, 4:44 pm

If it was me, I'd keep in mind that good 7 sec. bracket cars tend to be REALLY consistent. That said, you'll probably be a little more consistent if you do it without the bottle. Less tuning, fewer variables......
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Re: Need help getting to running a 7.0 1/8th mile

Post  85bigblockfox on January 2nd 2013, 4:49 pm

It doesnt spin. Cant tell much but heres the video from 2010. Motor sat last year.

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Re: Need help getting to running a 7.0 1/8th mile

Post  BM2271 on January 2nd 2013, 4:57 pm

The converter is way too tight and not enough gear. Does it have a trans brake? Where are you planning on running? Around here if you cant be .030 or better on the .400 tree doesn't matter what the car can run.

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Re: Need help getting to running a 7.0 1/8th mile

Post  richter69 on January 2nd 2013, 7:28 pm

start it and do a burnout......
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Re: Need help getting to running a 7.0 1/8th mile

Post  71maverick on January 2nd 2013, 11:34 pm

I agree with all thats been said...gotta get it leaving harder..butn not so aggressive you cant hook consistant.. One other thing...and not all will agree here.. If you dont have much $ in your c6 start looking for a c4.. Itnis worth about .07 in the 1/8th.. Gotta watch for a bell and if you get to bigger power one day you will find some longevity issues...but what you are doing it would be fine and if you get close and need a little more it will work...jmo
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Re: Need help getting to running a 7.0 1/8th mile

Post  f250mike on January 2nd 2013, 11:36 pm

my pig of a truck went 7.10's with a 1.5x 60ft the last time out.
With some tweeking and maybe the recommended gear change you should be there.
We have similar engine builds. You have a much larger carb 850-vs-1150.
You are also around 400lbs lighter and not as boxy Smile
Oh and I use a transbrake. You didn't mention having one.
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Re: Need help getting to running a 7.0 1/8th mile

Post  cool40 on January 2nd 2013, 11:46 pm

put the gear in it and see what it does.100 mph should put you in the 6.80's and it's all about the 60' for 1/8 mile deal.
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Re: Need help getting to running a 7.0 1/8th mile

Post  69F100 on January 3rd 2013, 1:22 am

I would try the gear change if you already have the gears all it would cost is the gear oil and some rtv.If that don't get you there get a looser converter.

The 1st converter I had in mine was a 3500 and it was tight for my engine I keep it at 6500rpm also 1.60s to 1.58 was about the best I could get out of it 7.27 in the 1/8 went to the 4500 converter in it now and went to 1.42 60' times and 6.72 to 6.78 with the same 99.5mph in the 1/8 just couldn't get 100mph out of it in the 1/8 my truck is 3365 with me in it but I have a 4.88 gear with 31x10.5 w mt slicks.
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Re: Need help getting to running a 7.0 1/8th mile

Post  dfree383 on January 3rd 2013, 1:28 am

1) get as much weight out of the car as you can.
2) get a convertor built for it.
3) some more gear will work for 1/8 mile stuff
4) Get some slicks and start working on your suspension.
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Re: Need help getting to running a 7.0 1/8th mile

Post  85bigblockfox on January 3rd 2013, 9:03 am

I have slicks for this year. We ran a stock 302 with some nitrous same suspension when the bigblock was in there. The small block went 10.98 with 1.59 60ft. I dont have a transbreak. I will put the gears in and see what weight I can pull out. Going to order some strange 10 ways struts for the front. When the funds allow I will also put a tube k member in the car.
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Re: Need help getting to running a 7.0 1/8th mile

Post  richter69 on January 3rd 2013, 9:32 am

those slicks have been fast, should be worth at least 72.54 hp on your application.........
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Re: Need help getting to running a 7.0 1/8th mile

Post  85bigblockfox on January 3rd 2013, 9:41 am

richter69 wrote:those slicks have been fast, should be worth at least 72.54 hp on your application.........

LOL bolt ons
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Re: Need help getting to running a 7.0 1/8th mile

Post  the Coug on January 3rd 2013, 10:31 am

Hey just have Jon come overe and touch it it should do 7.0 easy Razz
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Re: Need help getting to running a 7.0 1/8th mile

Post  richter69 on January 3rd 2013, 11:30 am

I have touched it.......... cheers
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Re: Need help getting to running a 7.0 1/8th mile

Post  maverick on January 3rd 2013, 11:44 am

richter69 wrote:I have touched it.......... cheers

Didn't work. Shocked Laughing
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Re: Need help getting to running a 7.0 1/8th mile

Post  richter69 on January 3rd 2013, 12:04 pm

I may T bag it next............ Very Happy
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Re: Need help getting to running a 7.0 1/8th mile

Post  85bigblockfox on January 3rd 2013, 12:33 pm

richter69 wrote:I may T bag it next............ Very Happy

Whatever it takes as long as the hEro juice stays in the bag.
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Re: Need help getting to running a 7.0 1/8th mile

Post  PanaVet on January 3rd 2013, 2:06 pm

Will it be .500 or .400 tree? Throttle stop or mechanical stop. Also once you get it to 7.0, how do you plan to keep it there with weather changes?

6.0 and 7.0 have become very popular especially in AL. Some very tough racing indeed. Teen lights and dead on are the norm for the guys that go rounds.
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Re: Need help getting to running a 7.0 1/8th mile

Post  maverick on January 3rd 2013, 2:14 pm

PanaVet wrote:Will it be .500 or .400 tree? Throttle stop or mechanical stop. Also once you get it to 7.0, how do you plan to keep it there with weather changes?

6.0 and 7.0 have become very popular especially in AL. Some very tough racing indeed. Teen lights and dead on are the norm for the guys that go rounds.

So true. 6.0 and 7.0 cars are pretty well behaved on the track, so some can print time slips like Xerox.
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Re: Need help getting to running a 7.0 1/8th mile

Post  maverick on January 3rd 2013, 2:27 pm

85bigblockfox, you wouldn't happen to be in 'Bama, would you? If so, you've picked a fun class to race. Cool ..but you'll probably hafta trailer a lot of cars to get paid. Wink
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