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et p/u from porting heads? #1573374 02/02/14 10:55 PM 02/02/14 10:55 PM
Joined: Nov 2003 Posts: 893 illinois R rbkt65 OP super stock
rbkt65 OP super stock R Joined: Nov 2003 Posts: 893 illinois	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

Re: et p/u from porting heads? [Re: rbkt65] #1573375 02/03/14 01:18 AM 02/03/14 01:18 AM
Joined: Aug 2003 Posts: 43,176 Bend,OR USA C Cab_Burge I Win
Cab_Burge I Win C Joined: Aug 2003 Posts: 43,176 Bend,OR USA	With no other changes except improving the cylinder head flow you can expect between 2.0 to 2.25 HP per CFM increase, usually I have seen those kinds of improvements with cylinder head flow improvements Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)

Re: et p/u from porting heads? [Re: rbkt65] #1573376 02/03/14 02:33 AM 02/03/14 02:33 AM
Joined: Jan 2003 Posts: 6,591 Canton, Ohio S Sport440 master
Sport440 master S Joined: Jan 2003 Posts: 6,591 Canton, Ohio	Like Cab states, you could see a Potential of 2 to 2.2 or so HP per CFM gain. It doesnt mean you will see all of that, it will depend on your overall combo. Your 540 could use the extra flow for sure IMO. Ill guess a tenth or so, without even knowing your complete combo.

Re: et p/u from porting heads? [Re: Sport440] #1573377 02/03/14 02:43 AM 02/03/14 02:43 AM
Joined: Feb 2005 Posts: 20,174 PA. pittsburghracer "Little"John
pittsburghracer "Little"John Joined: Feb 2005 Posts: 20,174 PA.	Something to keep in mind on head flow numbers. If you are looking at the big number 700 plus lift and you are only running a 550 lift cam don't get crazy ideas and figure above and beyond your actual cam lift minus valve lash and pushrod deflection. 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

Re: et p/u from porting heads? [Re: rbkt65] #1573378 02/03/14 11:40 AM 02/03/14 11:40 AM
Joined: Nov 2004 Posts: 3,544 Syracuse,NY CompWedgeEngines master
CompWedgeEngines master Joined: Nov 2004 Posts: 3,544 Syracuse,NY	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. RIP Monte Smith Your work is a reflection of yourself, autograph it with quality. WD for Diamond Pistons,Sidewinder cylinder heads, Wiseco, K1 rods and cranks,BAM lifters, Morel lifters, Molnar Technologies, Harland Sharp, Pro Gear, Cometic, King Engine Bearings and many others.

Re: et p/u from porting heads? [Re: CompWedgeEngines] #1573379 02/04/14 12:33 AM 02/04/14 12:33 AM
Joined: Nov 2003 Posts: 893 illinois R rbkt65 OP super stock
rbkt65 OP super stock R Joined: Nov 2003 Posts: 893 illinois	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

Re: et p/u from porting heads? [Re: rbkt65] #1573380 02/04/14 12:44 AM 02/04/14 12:44 AM
Joined: Jan 2003 Posts: 9,999 Frostbitefalls MN (Rocky&Bullw... gregsdart master
gregsdart master Joined: Jan 2003 Posts: 9,999 Frostbitefalls MN (Rocky&Bullw...	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

Re: et p/u from porting heads? [Re: gregsdart] #1573381 02/04/14 01:19 AM 02/04/14 01:19 AM
Joined: Nov 2003 Posts: 893 illinois R rbkt65 OP super stock
rbkt65 OP super stock R Joined: Nov 2003 Posts: 893 illinois	sorry again, best of 9.43, just under 140 mph

Re: et p/u from porting heads? [Re: rbkt65] #1573382 02/04/14 01:25 AM 02/04/14 01:25 AM
Joined: Aug 2006 Posts: 2,141 junction city oregon V viperblue72 top fuel
viperblue72 top fuel V Joined: Aug 2006 Posts: 2,141 junction city oregon	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.

Re: et p/u from porting heads? [Re: viperblue72] #1573383 02/04/14 02:12 AM 02/04/14 02:12 AM
Joined: Jun 2003 Posts: 52,972 Romeo MI MR_P_BODY Master
MR_P_BODY Master Joined: Jun 2003 Posts: 52,972 Romeo MI	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

Re: et p/u from porting heads? [Re: rbkt65] #1573384 02/04/14 09:23 AM 02/04/14 09:23 AM
Joined: Jan 2003 Posts: 9,999 Frostbitefalls MN (Rocky&Bullw... gregsdart master
gregsdart master Joined: Jan 2003 Posts: 9,999 Frostbitefalls MN (Rocky&Bullw...	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

Re: et p/u from porting heads? [Re: rbkt65] #1573385 02/04/14 11:44 AM 02/04/14 11:44 AM
Joined: Jun 2010 Posts: 3,112 LONG ISLAND fishy340 master
fishy340 master Joined: Jun 2010 Posts: 3,112 LONG ISLAND	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.

Re: et p/u from porting heads? [Re: fishy340] #1573386 02/04/14 04:03 PM 02/04/14 04:03 PM
Joined: Aug 2003 Posts: 43,176 Bend,OR USA C Cab_Burge I Win
Cab_Burge I Win C Joined: Aug 2003 Posts: 43,176 Bend,OR USA	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. I've learn the hard way(more than once )that when a major change like yours occurs there is usually a reason for the no pick up in performance Traction, igntion and fuel supply problems come to my mind immediatily Did you have the heads flow tested before and after on a impartial bench ? Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)

Re: et p/u from porting heads? [Re: Cab_Burge] #1573387 02/04/14 04:54 PM 02/04/14 04:54 PM
Joined: Jun 2010 Posts: 3,112 LONG ISLAND fishy340 master
fishy340 master Joined: Jun 2010 Posts: 3,112 LONG ISLAND	I usually look at mph and there was Zilch,nada, nothing increased.I didnt even go faster with my pockets 2600 lighter

Re: et p/u from porting heads? [Re: fishy340] #1573388 02/04/14 05:24 PM 02/04/14 05:24 PM
Joined: Jul 2004 Posts: 19,317 State of confusion T Thumperdart I Live Here
Thumperdart I Live Here T Joined: Jul 2004 Posts: 19,317 State of confusion	I know for me that when I went from Vicroy fully ported 906`s and a solid 590-605 Isky cam to my home ported rpm`s and a .680-.660 solid roller, it picked up from 10.48 to 9.79 and it`s not sorted out yet either............. 72 Dart 470 n/a BB stroker street car `THUMPER`...Check me out on FB Dominic Thumper for videos and lots of carb pics......760-900-3895.....

Re: et p/u from porting heads? [Re: rbkt65] #1573389 02/04/14 06:05 PM 02/04/14 06:05 PM
Joined: Nov 2004 Posts: 2,119 sc T tjmarcus1 top fuel
tjmarcus1 top fuel T Joined: Nov 2004 Posts: 2,119 sc	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?

Re: et p/u from porting heads? [Re: rbkt65] #1573390 02/04/14 06:48 PM 02/04/14 06:48 PM
Joined: Feb 2005 Posts: 28,312 Cincinnati, Ohio Challenger 1 Too Many Posts
Challenger 1 Too Many Posts Joined: Feb 2005 Posts: 28,312 Cincinnati, Ohio	IMO not much at all with no other changes, maybe even go slower. I have had heads ported and didn't make much gain with that alone in ET or MPH.

Re: et p/u from porting heads? [Re: Challenger 1] #1573391 02/04/14 07:00 PM 02/04/14 07:00 PM
Joined: Jun 2003 Posts: 9,225 Charleston S sixpackgut Drag Week Mod Champion
sixpackgut Drag Week Mod Champion S Joined: Jun 2003 Posts: 9,225 Charleston	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. Gen 3 power 6.22@110, 9.85@135 Follow @g3hemiswap on instagram performance only racing, CRT, ultimate converter, superior design concepts, ThumperCarbs

Re: et p/u from porting heads? [Re: sixpackgut] #1573392 02/06/14 08:47 AM 02/06/14 08:47 AM
Joined: Feb 2005 Posts: 846 Long Island, NY Cudafied super stock
Cudafied super stock Joined: Feb 2005 Posts: 846 Long Island, NY	I went from 10.0's @ 133 to 9.50's @ 140. I had out of the box SR heads on my 499 and opened them up to max wedge size and worked on the runner and bowl. Between the extra port volume and the 40 cfm increase from .500 to .700 lift it really woke it up. I'm sure if I had a better head it would pick up more.

Re: et p/u from porting heads? [Re: fishy340] #1573393 02/06/14 09:28 AM 02/06/14 09:28 AM
Joined: Jan 2003 Posts: 32,394 Q Quicktree I Win
Quicktree I Win Q Joined: Jan 2003 Posts: 32,394	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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