Stock hp exhaust manifolds, b body, anyone running in
#1083912
09/27/11 09:19 PM
09/27/11 09:19 PM
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Joined: Feb 2003
Posts: 1,572
wisconSIN
Blown61
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OP
pro stock
Joined: Feb 2003
Posts: 1,572
wisconSIN
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Re: Stock hp exhaust manifolds, b body, anyone running in
[Re: Blown61]
#1083913
09/27/11 10:01 PM
09/27/11 10:01 PM
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Joined: Oct 2004
Posts: 731
NY
XXHEMI
super stock
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super stock
Joined: Oct 2004
Posts: 731
NY
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Yes 10.71@130mph with an automatic and 10.81@131mph stick
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Re: Stock hp exhaust manifolds, b body, anyone running in
[Re: XXHEMI]
#1083917
09/27/11 10:21 PM
09/27/11 10:21 PM
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Joined: Feb 2003
Posts: 1,572
wisconSIN
Blown61
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OP
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Quote:
This red car here is a 505ci with 906 heads done by Dwyane Porter. It has stock six pack intake and exhaust manifolds. 14 to 1 compression and a big roller that I don't have the spec on but either Dwayne or Mike from HP motors could steer you in the right direction. The car has it's complete original suspension run on a six inch bias ply and weighs 3900 with driver. My son has put about three hundred and fifty passes on it and every year it get FASTER!
Damn that is impresive. What size exhaust pipes off the manifolds??
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Re: Stock hp exhaust manifolds, b body, anyone running in
[Re: Blown61]
#1083919
09/27/11 10:31 PM
09/27/11 10:31 PM
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Joined: Oct 2004
Posts: 731
NY
XXHEMI
super stock
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super stock
Joined: Oct 2004
Posts: 731
NY
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Quote:
Quote:
This red car here is a 505ci with 906 heads done by Dwyane Porter. It has stock six pack intake and exhaust manifolds. 14 to 1 compression and a big roller that I don't have the spec on but either Dwayne or Mike from HP motors could steer you in the right direction. The car has it's complete original suspension run on a six inch bias ply and weighs 3900 with driver. My son has put about three hundred and fifty passes on it and every year it get FASTER!
Damn that is impresive. What size exhaust pipes off the manifolds??
2 1/2 tti x pipes with ultra flows all the way out to the back
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Re: Stock hp exhaust manifolds, b body, anyone running in
[Re: XXHEMI]
#1083920
09/27/11 10:32 PM
09/27/11 10:32 PM
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Joined: Feb 2003
Posts: 1,572
wisconSIN
Blown61
OP
pro stock
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OP
pro stock
Joined: Feb 2003
Posts: 1,572
wisconSIN
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Quote:
Quote:
Quote:
This red car here is a 505ci with 906 heads done by Dwyane Porter. It has stock six pack intake and exhaust manifolds. 14 to 1 compression and a big roller that I don't have the spec on but either Dwayne or Mike from HP motors could steer you in the right direction. The car has it's complete original suspension run on a six inch bias ply and weighs 3900 with driver. My son has put about three hundred and fifty passes on it and every year it get FASTER!
Damn that is impresive. What size exhaust pipes off the manifolds??
2 1/2 tti x pipes with ultra flows all the way out to the back
Thanks for the info 
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Re: Stock hp exhaust manifolds, b body, anyone running in
[Re: XXHEMI]
#1083922
09/27/11 11:00 PM
09/27/11 11:00 PM
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Joined: Feb 2003
Posts: 1,572
wisconSIN
Blown61
OP
pro stock
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OP
pro stock
Joined: Feb 2003
Posts: 1,572
wisconSIN
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Quote:
Quote:
Quote:
This red car here is a 505ci with 906 heads done by Dwyane Porter. It has stock six pack intake and exhaust manifolds. 14 to 1 compression and a big roller that I don't have the spec on but either Dwayne or Mike from HP motors could steer you in the right direction. The car has it's complete original suspension run on a six inch bias ply and weighs 3900 with driver. My son has put about three hundred and fifty passes on it and every year it get FASTER!
Damn that is impresive. What size exhaust pipes off the manifolds??
2 1/2 tti x pipes with ultra flows all the way out to the back
Why didn't you go with the 3" exhaust with that big of a motta?
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Re: Stock hp exhaust manifolds, b body, anyone running in
[Re: XXHEMI]
#1083924
09/27/11 11:08 PM
09/27/11 11:08 PM
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Joined: Feb 2003
Posts: 1,572
wisconSIN
Blown61
OP
pro stock
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OP
pro stock
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Quote:
Car was built for FAST rules. Exhaust must be the same size the car was delivered with.
Ah thanks.
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Re: Stock hp exhaust manifolds, b body, anyone running in
[Re: mosweethemi]
#1083926
09/28/11 10:32 AM
09/28/11 10:32 AM
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Joined: May 2005
Posts: 6,446
NJ-USA
HPMike
master
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master
Joined: May 2005
Posts: 6,446
NJ-USA
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Quote:
Hey On my 1970 six pack Road Runner I run stock exhaust manifolds and a H pipe with 3" and 40,s flowmaster all the way. Works great!Did any Mopars come with 2.1/2 exhaust? All of my big block cars I had was only 2.1/4 on them. Also my 1968 Hemi Road Runner 
FAST rules allow 2.5" all the way out, but you are correct. Hemi headpipes were 2.5" though.
MB
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Re: Stock hp exhaust manifolds, b body, anyone running in
[Re: HPMike]
#1083927
09/28/11 11:38 AM
09/28/11 11:38 AM
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Joined: Jan 2003
Posts: 9,876
Weddington, N.C.
Streetwize
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master
Joined: Jan 2003
Posts: 9,876
Weddington, N.C.
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 Word to the guys who insist you HAVE to have 2" Primary headers and dual 3" exhausts One Major 'trick' to running manifolds is you pretty much have to isolate the intake and exhaust events as much as possible (often by both reducing overlap and a late opening intake....i.e., very similar to an injected motor), so in a larger sense you intentionally lose/forfeit the overlap 'scavenging effect' so now you really have to make that intake runner work hard and breathe deep 'on its own'. The Exhaust really HAS to go out of the cylinder regardless and a restrictive manifold certainly adds resistence to the crank and to the opposing power stroke, but the high compression offsets that some as well by increasing the exhaust pressure and velocity.
Last edited by Streetwize; 09/28/11 02:50 PM.
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