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Author Topic:   are these good exhaust manifolds
sandhillbandit
Dirt Full Roller

Total posts: 43
posted July 20, 2003 07:49 PM  
the cast # is 14093654 RH 8 are these a good set to run in a stock class they cam off an old 350 that was in a van. thanx in advance.

pit_boss
Dirt Forum Racer

Total posts: 80
posted July 20, 2003 08:12 PM  
I had them on my motor also,they have the bigger outlet on them so I figured they were better. I had read some place that they were a good set to use.just figured on stock exhaust bigger is better. good luck..Jim

Hutch5375
Dirt Maniac

Total posts: 123
posted July 20, 2003 09:15 PM  
I've got a slight problem with my exhaust manifolds. The motor I was using was a 305 and the passenger side manifold does not work with my new 350. Can anyone point me in a direction for a new set? What's everyone use for exhaust from the manifold back?

racer17j
Dirt Forum Champ
Total posts: 5390
posted July 20, 2003 10:51 PM  
I think your talking about the 305 manifolds they have a differant bolt pattern on that side,if you've switched to a 350 you'll want the bigger outlets anyway. youcan get them off a chevy truck. good luck...Jim

BGA
Dirt Forum Racer

Total posts: 78
posted July 21, 2003 11:47 PM  
an easier way is to use a crayola cran(sp), the wax type. Just run a stripe dowm the exhaust pipe and where ever the crayon stops melting is where the pipes should be cut at. Thats how I have done mine for years and it seems to work great.
Bruce

pit_boss
Dirt Forum Racer

Total posts: 80
posted July 23, 2003 08:58 PM  
BGA,on the length of the pipe were is a good starting length, our car is x braced and are limited on length and to go under the x gets to close to the ground. thanks....Jim

iowa_dirt_track_girl
Dirt Freak

Total posts: 461
posted August 11, 2003 10:04 PM  
well on how far you need to run them according to brezinski you need to run nuthin smaller then 2 1/4 inch pipe and no shorter then 56 inches we run them to the side of the car under the x brace and it works fine and we have found on the dyno it does add about 7 horse power and the curve stayes more flat hope that helps you out

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you never know how fast you are going when your in the lead, until you blow the announcers hat off!!!

Hutch5375
Dirt Maniac

Total posts: 123
posted August 12, 2003 08:16 PM  
On the passenger side exhaust manifold the rear bolt hole is spaced different on a 305, kind of odd, but JB weld works great.

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