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Re: 383man #720246
06/11/10 08:30 AM
06/11/10 08:30 AM
Joined: Sep 2004
Posts: 22,873
Chicken coop
dustergirl340 Offline
Chicken Little
dustergirl340  Offline
Chicken Little

Joined: Sep 2004
Posts: 22,873
Chicken coop
Quote:

Quote:

I have never uncapped mine but I have 3" pipes with the Dyno-Max Ultra-Flow mufflers that are straight thru so I really dont think uncapping my 63 would help much at all. Ron




I guess it's the thought that counts???

Wayne




Never know for sure unless you try.

Re: 383man [Re: Dodgem] #720247
06/11/10 09:07 AM
06/11/10 09:07 AM
Joined: Feb 2005
Posts: 5,221
Branson, Mo.
J
joedust451 Offline OP
super gas
joedust451  Offline OP
super gas
J

Joined: Feb 2005
Posts: 5,221
Branson, Mo.
Quote:

Quote:

Run it the way it is first, rejet it richer and leaner, if needed at the track




Yea don't go all crazy on jets you are already up from stock rich will slow it down. Next move might be something in the 850 CFM area. with that small exhaust I would look at 4 to 5 tenths in the 1/8





I'm thinking of leaving the jetting too as a starting point, but 4-5 tenths in the 1/8 , i don't see this car having 7.6s-7.7s in it, thats wishful thinking, i think there might be another 2 tenths or so in the 1/4, but thats it, & NO 850, A 650dp is plenty fine for what i'm doing.


75 Duster, 451 10.87 @ 123.58 NA 97 Z28 6sp., 12.01 @ 115 on a 100 shot 71 Swinger. 360 magnum. 12.58 @ 105 78 cutlass, 469 BBC. 12.70 @ 108 on street tires. http://www.youtube.com/watch?v=Z2kqNmMfheU
Re: Gains from un-corked exhaust? [Re: joedust451] #720248
06/11/10 12:06 PM
06/11/10 12:06 PM
Joined: Oct 2003
Posts: 11,688
W. Kentucky
justinp61 Offline
I Live Here
justinp61  Offline
I Live Here

Joined: Oct 2003
Posts: 11,688
W. Kentucky
My Dart picked up .2 in the 1/8 on back to back runs, it had 2 1/2" with Flowmaster 40s and turn downs at the axle.

Re: Gains from un-corked exhaust? [Re: justinp61] #720249
06/11/10 01:16 PM
06/11/10 01:16 PM
Joined: Feb 2005
Posts: 5,221
Branson, Mo.
J
joedust451 Offline OP
super gas
joedust451  Offline OP
super gas
J

Joined: Feb 2005
Posts: 5,221
Branson, Mo.
Have any of you noticed an "increase" in your RPMs after dropping the exhaust? Maybe that is the reason i can only manage 5200 in mine.

Justin, whats your combo, & did you run extentions, or was that just at the collector??


75 Duster, 451 10.87 @ 123.58 NA 97 Z28 6sp., 12.01 @ 115 on a 100 shot 71 Swinger. 360 magnum. 12.58 @ 105 78 cutlass, 469 BBC. 12.70 @ 108 on street tires. http://www.youtube.com/watch?v=Z2kqNmMfheU
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