Re: et p/u from porting heads?
[Re: rbkt65]
#1573378
02/03/14 11:40 AM
02/03/14 11:40 AM
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Joined: Nov 2004
Posts: 3,544 Syracuse,NY
CompWedgeEngines
master
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master
Joined: Nov 2004
Posts: 3,544
Syracuse,NY
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Quote:
pro comp on 540 wedge and new they flowed 292 on intake. motor apart to be freshened and Gary opened ports to max wedge size and had them flowed again. now flow 345 on same bench as Hughes has. what et pickup would we expect? also the guy said his carb may not be big enough. he has alcohol 1050 dominator. don't know if it really flows 1050 or not. thanks in advance rick
The real answer is.....who knows ? There simply is not enough information here to say. It SHOULD pick up on a motor that size fairly well, but we dont have enough information on flow numbers, C/R, camshaft, RPMs, car weight, converter etc. Its not directly JUST related tot he CFM increase. Where the increases are made in the flow curve etc. If other changes are made whent he car is put back on the track, then its all moot anyways.
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Re: et p/u from porting heads?
[Re: rbkt65]
#1573380
02/04/14 12:44 AM
02/04/14 12:44 AM
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Joined: Jan 2003
Posts: 10,011 Frostbitefalls MN (Rocky&Bullw...
gregsdart
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I Live Here
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Frostbitefalls MN (Rocky&Bullw...
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You didn't say what ET the car is currently running, but the rest of the specs say it ought to be worth at least 80 hp, Based on being head restricted and having high compression.
8..603 156 mph best, 2905 lbs 549, indy 572-13, alky
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Re: et p/u from porting heads?
[Re: viperblue72]
#1573383
02/04/14 02:12 AM
02/04/14 02:12 AM
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Joined: Jun 2003
Posts: 52,972 Romeo MI
MR_P_BODY
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Master
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Romeo MI
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Quote:
I would guess anywhere from 75 to 100 horsepower. I don't know what that's worth in e.t. at the level you are at. It's pretty rare to not see a significant gain from head porting in my experience.
I really doubt that kind of power unless he goes bigger on other parts to keep it all in line... just the port work might be 60-70hp
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Re: et p/u from porting heads?
[Re: rbkt65]
#1573384
02/04/14 09:23 AM
02/04/14 09:23 AM
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Joined: Jan 2003
Posts: 10,011 Frostbitefalls MN (Rocky&Bullw...
gregsdart
I Live Here
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I Live Here
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Quote:
sorry again, best of 9.43, just under 140 mph
I am betting on 9.20 or better. That 540 with only 292 cfm was trying to breath through a straw. The percentage of flow increase based on what the motor would really like is very big. Now if it was a 451, it might only see 40 hp. The other thing is the intake had to change to match the bigger port, or I assume so. Another thing is cam. Not many cams are optimized for a choked motor like it was before head porting. If the cam was off the shelf, then that would be true.
8..603 156 mph best, 2905 lbs 549, indy 572-13, alky
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Re: et p/u from porting heads?
[Re: rbkt65]
#1573389
02/04/14 06:05 PM
02/04/14 06:05 PM
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Joined: Nov 2004
Posts: 2,119 sc
tjmarcus1
top fuel
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top fuel
Joined: Nov 2004
Posts: 2,119
sc
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Quote:
sorry should have included that info-3k w/driver,4.10 gears,690 flat tappet,5500 conv,shifts at 6800,14.9 comp ratio. thanks again rick
You shift a 540 with a .590 lift flat tappet cam [prob. not a true .590] at 6800? sounds a little high?
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Re: et p/u from porting heads?
[Re: Challenger 1]
#1573391
02/04/14 07:00 PM
02/04/14 07:00 PM
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Joined: Jun 2003
Posts: 9,225 Charleston
sixpackgut
Drag Week Mod Champion
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Drag Week Mod Champion
Joined: Jun 2003
Posts: 9,225
Charleston
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in my experience, fuel injection guys always pick up because they have their car tuned after the work is done. Carb guys put the carb back on the engine, take it out and runs the same then complain that they spent money on porting that didn't help
Last edited by sixpackgut; 02/04/14 07:01 PM.
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Re: et p/u from porting heads?
[Re: fishy340]
#1573393
02/06/14 09:28 AM
02/06/14 09:28 AM
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Joined: Jan 2003
Posts: 32,394
Quicktree
I Win
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I Win
Joined: Jan 2003
Posts: 32,394
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Quote:
A few yrs ago i had my sb eddie heads done and saw 0 in return for $ 2600 worth of work done to 2300 dollar heads.I got jacked by Barton on that.
did you change cam,converter etc?
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