Re: Exhaust Size
[Re: TOMRR]
#2405142
11/17/17 07:46 PM
11/17/17 07:46 PM
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Joined: Aug 2003
Posts: 43,292 Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,292
Bend,OR USA
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I have a 1969 Dart that had a 440 in it with 2.5 inch exhaust out of the 2.0 inch primary pipe Hooker fenderwell headers with a 3.5 inch collector headers to a set of old Corvair type Turbo muffs and then to a set of pipes that exited in front of the rear tires, That car ran 12.23 at 109.4 MPH through that exhaust, it ran 11.39 at 117.7 MPH with it removed The next pump gas street race car I built had a 3.0 exhaust system on it from the same h Hooker headers off of the Dart to a set of rear mounted(behind the rear end) Magnaflow oval 14x3.0x7 inch long muffs with no tips or tail pipes(they where mounted at the rear bumper ) That car ran 7.01 ET at 95.4 MPH with that exhaust system on the car and ran 6.98 at 95.6 MPH with it off I would and do use three inch now for any of my half way serious street cars My next street racer will have 3.5 or 4.0 inch on it
Last edited by Cab_Burge; 11/17/17 07:48 PM.
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: Exhaust Size
[Re: 71birdJ68]
#2405267
11/18/17 01:23 AM
11/18/17 01:23 AM
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Joined: Aug 2003
Posts: 43,292 Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,292
Bend,OR USA
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So, I take it this is pretty stock with 400 hp? Really a stock system would be fine.But a 2 1/5 would be all you will need with an H pipe.I have a 528 with a 2 1/5 stock system with resonators, and it is good enough for the street. The mufflers are Hemi mufflers that flow better than stock. Have you ever ran your car without the current system with no other changes? The reason I ask is that I didn't "feel" the .9 ET and 8 MPH increase in my old Dart by removing the exhaust system and I have a ton of time in race cars That car weighed around 3500 Lbs. with me in it so do the Google on how much HP that old stock stroke stock bore 440 motor made, it was not a rocket ship even back then
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: Exhaust Size
[Re: Cab_Burge]
#2405277
11/18/17 01:45 AM
11/18/17 01:45 AM
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Joined: Nov 2003
Posts: 36,041 Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
Joined: Nov 2003
Posts: 36,041
Lincoln Nebraska
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3" (with mandrel bends) from end to end would give the highest nth degree of performance but would need creative work to keep it down to a loud roar. Dyna max Hemi muffs up front & glasspacks alongside the rear leafs & maybe helmholts resonators or other tricks. My take: a very quiet restricted system & cable (preferred) or vacuum cutouts right at the collectors so I can TOTALLY control the noise factor, I ain't in high school & when the money is in the hands of a neutral 3rd party then I can let er rip & 10 seconds later the money will be in MY hands.
live every 24 hour block of time like it's your last day on earth
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Re: Exhaust Size
[Re: TOMRR]
#2405357
11/18/17 10:02 AM
11/18/17 10:02 AM
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Joined: Sep 2007
Posts: 14,889 up yours
Supercuda
About to go away
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About to go away
Joined: Sep 2007
Posts: 14,889
up yours
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2 1/2 is fine for a street car.
Cab is in the narrow mindset of "everyone is a drag racer and every question is drag racing related, money is no object" group.
They say there are no such thing as a stupid question. They say there is always the exception that proves the rule. Don't be the exception.
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Re: Exhaust Size
[Re: Supercuda]
#2405947
11/19/17 03:15 PM
11/19/17 03:15 PM
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Joined: Aug 2003
Posts: 43,292 Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,292
Bend,OR USA
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2 1/2 is fine for a street car.
Cab is in the narrow mindset of "everyone is a drag racer and every question is drag racing related, money is no object" group.
Not exactly, my mind set is do it right once and don't look back My intent for my half way serious street cars is to be able to show most other hot rodders my taillights when needed
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: Exhaust Size
[Re: TOMRR]
#2405949
11/19/17 03:23 PM
11/19/17 03:23 PM
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Joined: Dec 2007
Posts: 18,157 Mass
DAYCLONA
I Live Here
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I Live Here
Joined: Dec 2007
Posts: 18,157
Mass
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I have a HP440, 400HP 500 Torque and the exhaust that is on car now is h-pipe and tail pipe are 2 1/4 . Should I upgrade to a 2 1/2 or even 3 ".
Thanks Tom C. Your fine with what you have, don't fall victim to the "size matters" crowd when it comes to exhaust systems, if you were pushing 1000 Hp, then yes, but with your combo, your more than adequate, unless your mufflers are very restrictive? what type/brand mufflers are you running?
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Re: Exhaust Size
[Re: DAYCLONA]
#2406060
11/19/17 08:53 PM
11/19/17 08:53 PM
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Joined: Jan 2003
Posts: 1,014 LEE, MASS
TOMRR
OP
super stock
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OP
super stock
Joined: Jan 2003
Posts: 1,014
LEE, MASS
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I have a HP440, 400HP 500 Torque and the exhaust that is on car now is h-pipe and tail pipe are 2 1/4 . Should I upgrade to a 2 1/2 or even 3 ".
Thanks Tom C. Your fine with what you have, don't fall victim to the "size matters" crowd when it comes to exhaust systems, if you were pushing 1000 Hp, then yes, but with your combo, your more than adequate, unless your mufflers are very restrictive? what type/brand mufflers are you running? Dynomax Ultra Flow Welded
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