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  #16 (permalink)  
Old 01-19-2013, 05:31 PM
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Get some tires that have traction. If a 23" is as tall as will fit, make sure its a sticky drag radial.
EG: P225-50-15 BFG drag radial. A normal street radial tire is all but useless at the track. They are made for long life not straight line traction.

A 8.5x 26x 15" M/T ET street Bias ply tire which is effective 25.5" tall will make a huge difference.
Its real hard to get a good track ET with a crap tire, reguardless of the gear ratio.

You will know you got it right when the front wheels go airborne on launch.
You got to get the weight back on the back tires to get a small tire to hook up. Weight transfer. But you do not want the rear suspension to squat on launch.

You can rev that engine a lot higher than 5500 rpm without fear of hurting it.
if thats is your self imposed rev limit port the camel backs and reinstall.
The 600VS carb is not doing it any favours. What is the exhaust system like?
Its all about total system air flow. Heads are only one component of the air flow chain.

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  #17 (permalink)  
Old 01-19-2013, 07:04 PM
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3.36 gears with 5500 rpm= speeds in gears of

1st=38,,2nd=57,,3rd=84,,4th=102,,5th=140

think about it? 0-60 requires 2 gear changes!!!in a car that light?
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Old 01-20-2013, 07:09 AM
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Quote:
Originally Posted by F-BIRD'88 View Post
Get some tires that have traction. If a 23" is as tall as will fit, make sure its a sticky drag radial.
EG: P225-50-15 BFG drag radial. A normal street radial tire is all but useless at the track. They are made for long life not straight line traction.

A 8.5x 26x 15" M/T ET street Bias ply tire which is effective 25.5" tall will make a huge difference.
Its real hard to get a good track ET with a crap tire, reguardless of the gear ratio.

You will know you got it right when the front wheels go airborne on launch.
You got to get the weight back on the back tires to get a small tire to hook up. Weight transfer. But you do not want the rear suspension to squat on launch.

You can rev that engine a lot higher than 5500 rpm without fear of hurting it.
if thats is your self imposed rev limit port the camel backs and reinstall.
The 600VS carb is not doing it any favours. What is the exhaust system like?
Its all about total system air flow. Heads are only one component of the air flow chain.
Thanks for that, on the strip last year 1st gear would not grip, so recently
boughts some toyos r888 super softs,took it down the road broke the rear diff
(ford atlas axle out of capri 3.08 gears) just putting a explorer axle under,the axle has:
3.73 gears at moment,but have got a set of 3.31 and 3.08 gears as well.shall
I stick with 3.08 then? More cam and better headers? I have only block huggers at moment?
I thought 5500rpm would be max on standard bottom end?
Thanks for your imput!
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Old 01-20-2013, 07:34 AM
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Have you ever considered an automatic? I would use a minimum of a solid flat tappet cam.If the engine is balanced,then 6500 rpm is usually safe.
I ran my small rod 454 to 7,000 rpm with no problems,what parts are in your bottom end? What parts are in your valve train?
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Old 01-20-2013, 08:09 AM
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Hi
I built motor with standard rods/bolts, 10.5" flywheel.480/480 cam
I used 210 procomp heads,hardened pushrods,stainless valves,and
springs to suit up to 550 lift hyd flat tappet cam.

I never tried it down the strip with the sticky tyres I ruined the diff
when I give it some gas!

Shall I use 3.08 gears in my 8.8?

I was hoping to get into the 11 secs with the car!

I was thinking I should be around 400 horsepower with the new heads.

Thanks again

Yes the motor was balanced!
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Old 01-20-2013, 08:29 AM
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400 hp will put a 2600 pound car into the mid 11s under ideal conditions. Street tires dont count for ideal conditions.The trap speed should go over 120 mph in a 2600 pound car with 400 hp
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Old 01-20-2013, 02:59 PM
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Quote:
Originally Posted by vinniekq2 View Post
3.36 gears with 5500 rpm= speeds in gears of

1st=38,,2nd=57,,3rd=84,,4th=102,,5th=140

think about it? 0-60 requires 2 gear changes!!!in a car that light?
See what you mean now!
Will stick to 3.08 gears now,thankyou
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