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Author Topic:   Help!!!! Need some advice
DRogers
Dirt Roller

Total posts: 6
posted April 07, 2004 09:25 AM  
Hey guys this girl needs some help. We run pure stock and we need some advice. Our car does good in turns but they pull away in the straight stretch. we bought the car already set up so some stuff I dont know for sure. Its 350 bored 30 over, 350 heads been shaved, Holly 500 2 barrell carb, 2 speed power glide running in low gear, 373 gears, 2 inch offset wheels with street tires, 1000# spring driverside front, 1200# spring passenger side front, rear springs I have know idea what they are and the cam is hopped up and was special made is all I know.Can someone tell me what we need to do or try

77k
Dirt Maniac

Total posts: 174
posted April 07, 2004 11:13 AM  
what size track and how big of tires? can you weld up rear end and is it?

racer17j
Dirt Forum Champ
Total posts: 5390
posted April 07, 2004 01:13 PM  
Is it possible to have so much cam that everyone runs away from you down the straight away? just wondering im having the same prob,Thanks for any help

DRogers
Dirt Roller

Total posts: 6
posted April 07, 2004 04:20 PM  
quote:
Originally posted by 77k:
what size track and how big of tires? can you weld up rear end and is it?

3/8 size track and the tire size is
Right rear 27560R15
Right Front 27560R15
Left Front 24560R15
Right Rear 25560R15

Yes the rear end is welded and we run with all 350's no strokers or 400 allowed.

Scoot
Dirt Forum Champ
Total posts: 517
posted April 07, 2004 04:40 PM  
Whats the rpm's when you run down the straights?

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Scoot
Smith Racing Team
870-365-5989

racer17j
Dirt Forum Champ
Total posts: 5390
posted April 07, 2004 07:13 PM  
If you know the specs on your cam, look it up and see where peak power is. Also, note what your rpm is coming off the corner. I have had a situation where the cam we selected, didn't make it's peak horsepower until I was halfway down the straight, then it would slam you back in the seat. You may need to change it for a cam that makes it's power ealier in the rpm range.

77k
Dirt Maniac

Total posts: 174
posted April 08, 2004 12:35 AM  
sounds like you should plenty of gear if not too much.It don't hurt to re adjust valves,**** timing 32/36 degrees at full advance,**** float level and jet size.It could be the cam or how it was degreed in.Does not hurt to **** plug wires and make sure it is hitting on all 8.

77k
Dirt Maniac

Total posts: 174
posted April 08, 2004 12:39 AM  
P.S. make sure the carb is open ALL the way when pedel is to the metal,I have seen them get out of adjustment.

Raz_900
Dirt Forum Champ
Total posts: 635
posted April 08, 2004 01:45 PM  
275/60's should be about a 86"-87" rollout. A 'glide in low is 1.82 (most common, 1.76 isn't all that different anyway). 1.82 x 3.73 = 6.8 effective gear. That's pretty steep on smallish tires. We tried 6.20's with 86"-87" tires once and were spinning 6200 with a blown headgasket. It prolly would have gone up around 7000 without the engine troubles. Yer probably over revving the thing so bad the valve springs are floating, module's missing and the 2bbl carb isn't doing you any favors at 7 grand either.

Watch the tach and see what it's spinning. I'd start looking for a 3.43 gear too.

kyuss71
Dirt Roller

Total posts: 20
posted April 08, 2004 09:45 PM  
Could this be a bias problem? if there is excessive weight transfer on entry, it could cause the rear to be light on exit letting the motor rev prematurly because of no hook up with too much weight still on the front on exit. Is the car good in the corners or does it just feel good?

PURESTOCK 46
Dirt Full Roller

Total posts: 40
posted April 08, 2004 10:13 PM  
IM WITH RAZ, SOUNDS LIKE TOO MUCH GEAR. HAD THE SAME PROBLEM ONCE. COULD KEEP UP IN THE CORNERS AND COMING OUT, BUT GET BLOWN AWAY HALFWAY DOWN THE STRAIGHT. CHANGED THE GEARS AND WON THE FEATURE THE NEXT WEEK.

DRogers
Dirt Roller

Total posts: 6
posted April 09, 2004 09:37 AM  
Ok if we switch up the tires like racer17j suggested and you start out on a tacky track do you keep the same when it becomes dry slick or do you do something different?

racer17j
Dirt Forum Champ
Total posts: 5390
posted April 09, 2004 03:31 PM  
I agree with Raz, switch your gears and you should be good to go. Running a powerglide you'll want 3.42's.

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