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Author Topic:   will this work
blade
Dirt Full Roller

Total posts: 34
posted February 16, 2004 06:35 PM  
new to dirt track racing. I have a 72 gto with bone stock 350 in it, 2bbl carb, turbo 350 tranny and posi 4.10 rear end. we will be racing a 3/8 high banked track. Will second gear in the tranny work? or will it rev to high? Can't afford much more! any ideas?

chad01j
Dirt Forum Racer

Total posts: 82
posted February 16, 2004 07:01 PM  
it depends on what size tire. is it a pontiac or chevy 350.

te33
Dirt Freak

Total posts: 237
posted February 16, 2004 09:17 PM  
second gear is 1.52x4.10=623,on a high banked 3/8ths,with a bone stock pontiac 350,i'd say no way.i wouldn't turn that pontiac past about 5-5500,and that gear will get you 7000.i would run a 373=567,or maybe a 356=541,depending on how fresh the motor is.as far as $,trade the 410's for the others,they will go like hotcakes.or go to the junk yard,those gears are real common in trucks.

racer17j
Dirt Forum Champ
Total posts: 5390
posted February 16, 2004 09:50 PM  
Sell the Goat to a restorer and build a Chevy!!!!

25JHenry
Dirt Full Roller

Total posts: 73
posted February 17, 2004 01:36 PM  
I'd run what I had he first week. If I was running out of rev's I'd change the gear. You want to get off the corners quick as possible. I started with a 2.41 gear with a turbo 350in 1st gear 2.53= 6.09. With a stock Chevy motor. 3/8 mile medium banked clay track. I couldn't run with them coming off turns 2 and 4. Like racer17j said, I think you'll be close with what you have. Check your tire roll. If the motor blows, it wasn't gonna last long anyway. I'd find a Chevy 350 and build it. If the money is tight check northernautoparts.com you can get a complete motor kit pistons and all for $175.00. I'm satisfied with my kit. The claimer at our track is $500.

racerguy500
Dirt Maniac

Total posts: 168
posted February 17, 2004 05:48 PM  
With a stock Pontiac engine you are gonna blow it on the first or second lap, can't turn them that high, raced them for years and 5000 is the highest you want to go. They have a very heavy bottom end and don't like rpm without mods being made. Good luck.

blade
Dirt Full Roller

Total posts: 34
posted February 17, 2004 06:23 PM  
the motor is a 350 chevy and our tracks tire rule is 205 70 or 75 series tires any other ideas? thanks

racer17j
Dirt Forum Champ
Total posts: 5390
posted February 17, 2004 09:34 PM  
you can have a good motor that will hold up for pretty reasonablre price. i have less then 500 in mine now that i have went to hyper flat tops and recon rods just get yourself a good cam and valve springs some good rod bolts and a re ring kit and have at it cost you about $250 to have a motor that will hold up to 6500 all day long just run 205/75/15 on the rear

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