Re: What now for this b1 exhaust port
[Re: kevinlc]
#2511946
06/22/18 11:03 PM
06/22/18 11:03 PM
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Joined: Aug 2011
Posts: 2,853 Pattison Texas
CSK
master
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master
Joined: Aug 2011
Posts: 2,853
Pattison Texas
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That converts to @28 intake 389.5, Ex @ 28 264.6,, Take it to the track & see what it runs.
Last edited by csk; 06/22/18 11:05 PM.
1968 Charger COLD A/C Hilborn EFI 512ci 9.7 compression, Stealth heads, 4.10 gear A518 ODtrans 4100lb,10.93 full street car trim 2020 T/A 392 Stock 11.79 @ 114.5
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Re: What now for this b1 exhaust port
[Re: kevinlc]
#2511956
06/22/18 11:17 PM
06/22/18 11:17 PM
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Joined: Sep 2015
Posts: 1,096 Australia
ozymaxwedge
super stock
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super stock
Joined: Sep 2015
Posts: 1,096
Australia
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Im no head guru but my maxed out SR's flow 368 @ .750 lift . Yours should be better or capable of being better.
1963 Plymouth Max Wedge 1971 Barracuda
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Re: What now for this b1 exhaust port
[Re: kevinlc]
#2511976
06/22/18 11:41 PM
06/22/18 11:41 PM
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Joined: Sep 2014
Posts: 4,457 Washington
madscientist
master
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master
Joined: Sep 2014
Posts: 4,457
Washington
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Don't worry about the exhaust.
Don't kill yourself over flow numbers. If the valve job is correct and the port work wasn't done with a body grinder you'll be fine.
Just because you think it won't make it true. Horsepower is KING. To dispute this is stupid. C. Alston
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Re: What now for this b1 exhaust port
[Re: Twostick]
#2511988
06/23/18 12:07 AM
06/23/18 12:07 AM
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Joined: Sep 2014
Posts: 4,457 Washington
madscientist
master
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master
Joined: Sep 2014
Posts: 4,457
Washington
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Who flows heads at 25"?
Kevin Many do. That's why I said don't get ate up over flow numbers. It's not like Barton is stupid.
Just because you think it won't make it true. Horsepower is KING. To dispute this is stupid. C. Alston
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Re: What now for this b1 exhaust port
[Re: kevinlc]
#2511996
06/23/18 12:26 AM
06/23/18 12:26 AM
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Joined: Feb 2005
Posts: 20,160 PA.
pittsburghracer
"Little"John
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"Little"John
Joined: Feb 2005
Posts: 20,160
PA.
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Local mopar racer. Says it’s makes more realistic numbers. Didn’t know this till I picked them up. Anyway, this motor should make more power buts it’s not. The 68 dart only runs 9.90 at 137 mph at 3100 lbs That’s pathetic. Something wrong big time with that combo.
1970 Duster Edelbrock headed 408 5.984@112.52 422 Indy headed small block 5.982@112.56 mph 9.42@138.27
Livin and lovin life one day at a time
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Re: What now for this b1 exhaust port
[Re: kevinlc]
#2512079
06/23/18 10:32 AM
06/23/18 10:32 AM
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Joined: Jan 2003
Posts: 14,492 So. Burlington, Vt.
fast68plymouth
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 14,492
So. Burlington, Vt.
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I doubt a 451 with B1 heads in a 3100lb car needs the heads to be any “bigger”(more porting).
I’m not sure if this is still the case, but SuperFlow used to have their flow benches calibrated at 25”, so some shops used that as the test pressure.
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123 Dealer for Comp Cams/Indy Heads
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Re: What now for this b1 exhaust port
[Re: kevinlc]
#2512097
06/23/18 11:30 AM
06/23/18 11:30 AM
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Joined: Jan 2003
Posts: 15,439 Val-haul-ass... eventually
BradH
Taking time off to work on my car
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Taking time off to work on my car
Joined: Jan 2003
Posts: 15,439
Val-haul-ass... eventually
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Had my standard b1’s race ported by Barton many years ago and flowed them a few days ago. The exhaust only flows 250 cfm at 550 lift at 25”. Valve size is 1.785. No gain from 550 to 800 lift. 2.300 intake maxes out at 368 cfm at .700 lift at 25”. This is an all out race motor with a roller cam. Is there more flow to be gained? This 451 race motor only made 794 hp at 7300 and 599 tq at 6300. What should I do? Start by putting a 4.25"-stroke crank in it to make better use of those big ports.
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Re: What now for this b1 exhaust port
[Re: kevinlc]
#2512284
06/23/18 07:45 PM
06/23/18 07:45 PM
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Joined: Mar 2006
Posts: 9,826 MI, usa
dvw
master
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master
Joined: Mar 2006
Posts: 9,826
MI, usa
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I think the converter is the issue. I run way more stall speed and less cam in my 572, 6100 flash stall. That is a lot of cam for a small motor. With the right converter that thing should run pretty decent. I'm sure with that cam and heads it would be even better on a 528/540 short block. Doug
Last edited by dvw; 06/23/18 09:39 PM.
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Re: What now for this b1 exhaust port
[Re: kevinlc]
#2512314
06/23/18 09:19 PM
06/23/18 09:19 PM
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Joined: Jan 2003
Posts: 14,492 So. Burlington, Vt.
fast68plymouth
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 14,492
So. Burlington, Vt.
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Yes and dynoed it also Max hp is 794 at 7300 Tq is 599 at 6300 Motor makes peak tq at 6300........ and you have a 5500 converter. That’s the first thing I’d be addressing.
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123 Dealer for Comp Cams/Indy Heads
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