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DUAL PLANE VS SINGLE PLANE INTAKE:
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cutlass389
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Joined: 29 Apr 2006
Posts: 268
Location: NC
8544.62 points


1978 Oldsmobile Cutlass

PostPosted: Wed Sep 20, 2006 5:57 am    Post subject: Reply with quote

Two tenths is significant but not a deal breaker IMO. If you have a clutch or some decent stall and shifting that high, the amount of time that you are in the mid-range is low by comparison, therefore a dual-plane should not be of any benefit and quite possibly a detriment. Make sure you keep up on those valvesprings Very Happy
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jeep_406
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Joined: 12 Sep 2002
Posts: 1661
Location: Tewksbury, Mass 01876
53123.48 points


1972 Chevrolet Nova

PostPosted: Wed Sep 20, 2006 8:49 am    Post subject: Reply with quote

I figure two tenths is a lot to lose through the mufflers.
As far as the valve train, the engine is coming out for inspection this winter. It will have about 250 runs on it and about 3500 miles.
When the weather turns, I'll do a leak down test and then pull it apart.
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cutlass389
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Joined: 29 Apr 2006
Posts: 268
Location: NC
8544.62 points


1978 Oldsmobile Cutlass

PostPosted: Thu Sep 21, 2006 8:39 pm    Post subject: Mufflers Reply with quote

I don't know what mufflers you're runnin' now but I am growing fond of my Dynomax bullets in 2.5". They're straight through, light weight, and actually muffle somewhat-especially with some sort of piping out of them. Theoretically they shouldn't absorb any power whatsoever and since mine are over the axle, anything less than 1/2 throttle is downright mellow.
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junkyarddog
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Joined: 07 Apr 2003
Posts: 88

1268.42 points


1982 Oldsmobile Cutlass

PostPosted: Fri Sep 22, 2006 8:19 am    Post subject: mufflers Reply with quote

The bullet style dynomaxs are good but regular chamber style are not. I have learned on those type no matter how big inlet/outlet the inside passages are only 2". What is person of having then?
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