This is topic MOST POWER FROM GT40 IRONS? in forum Tech Talk at Northern California Ford Owners  .


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Posted by jaejae (Member # 7958) on :
 
just curious but what was the most power gt40 heads are capable of..no porting no custom cams or n20..im still thinkn bout the edelbrock e street heads for 937$..but i would like to know if the underdog gt40 irons can still pull good number..thanks JAE
 
Posted by Notch1320 (Member # 2647) on :
 
Depends on what number you have in mind? I have seen stock unported, stock valve size GT-40's in the 10.30's in an N/A configuration... and I am sure others have gone quicker.

[ July 06, 2009, 04:14 AM: Message edited by: Notch1320 ]
 
Posted by Blind (Member # 3052) on :
 
I'd hope you could get 280rwhp+ with them, I made 249hp/296tq at the wheels on a dynojet with e7's on my healthy stock motor from the throttle body to the oil pan.

I know of a guy in socal with a ported set that made 304rwhp with gt40's on a street car 94/95gt..
 
Posted by turbo50 (Member # 6700) on :
 
GT40s have been in the 9s with boost.

Iam sure they were not stock GT40s but none the less....
 
Posted by blown95svt (Member # 8893) on :
 
a couple guys on corral with 94/95 cobras (gt40s and cobra intake) stock motors with a custom cam and s trim with 15lbs hitting 550 through an auto
 
Posted by jaejae (Member # 7958) on :
 
quote:
Originally posted by Blind:
I'd hope you could get 280rwhp+ with them, I made 249hp/296tq at the wheels on a dynojet with e7's on my healthy stock motor from the throttle body to the oil pan.

I know of a guy in socal with a ported set that made 304rwhp with gt40's on a street car 94/95gt..
and do you know how much that port work would cost?..thats a pretty good number from gt40 irons
 
Posted by turbo50 (Member # 6700) on :
 
quote:
Originally posted by jaejae:
quote:
Originally posted by Blind:
I'd hope you could get 280rwhp+ with them, I made 249hp/296tq at the wheels on a dynojet with e7's on my healthy stock motor from the throttle body to the oil pan.

I know of a guy in socal with a ported set that made 304rwhp with gt40's on a street car 94/95gt..
and do you know how much that port work would cost?..thats a pretty good number from gt40 irons
I dont think it would be cost effective.
 
Posted by Eddie510- (Member # 2354) on :
 
quote:
Originally posted by jaejae:
quote:
Originally posted by Blind:
I'd hope you could get 280rwhp+ with them, I made 249hp/296tq at the wheels on a dynojet with e7's on my healthy stock motor from the throttle body to the oil pan.

I know of a guy in socal with a ported set that made 304rwhp with gt40's on a street car 94/95gt..
and do you know how much that port work would cost?..thats a pretty good number from gt40 irons
depends if u want to do a complete job. 5 too 600 bucks but this quote i got from a very bad ass shop in newark that do very good work
 
Posted by Blind (Member # 3052) on :
 
quote:
Originally posted by turbo50:
quote:
Originally posted by jaejae:
quote:
Originally posted by Blind:
I'd hope you could get 280rwhp+ with them, I made 249hp/296tq at the wheels on a dynojet with e7's on my healthy stock motor from the throttle body to the oil pan.

I know of a guy in socal with a ported set that made 304rwhp with gt40's on a street car 94/95gt..
and do you know how much that port work would cost?..thats a pretty good number from gt40 irons
I dont think it would be cost effective.
+1, the guy did the port work himself, if you were to pay for the work, I'd say sell the gt40's and get a set of aluminum heads, cheaper in the long run.
 
Posted by wilit (Member # 3367) on :
 
quote:
Originally posted by Eddie510-:
depends if u want to do a complete job. 5 too 600 bucks but this quote i got from a very bad ass shop in newark that do very good work
$600 for port work + $300 for heads and you're still $300 lower than a new set of Edelbrocks or Trickflows. [patriot]

[ July 06, 2009, 09:18 PM: Message edited by: wilit ]
 
Posted by 2Foxes2Five0Coupes (Member # 9154) on :
 
Just get you some aluminum heads J. They will keep you lookin icey when you skatin. More power potential with aluminum less weight 2 but you already knowin.
 
Posted by Stan G (Member # 6226) on :
 
Blind " I made 249hp/296tq"

How the hell did you do that ?

Those are awfully good numbers !
 
Posted by turbo50 (Member # 6700) on :
 
quote:
Originally posted by wilit:
quote:
Originally posted by Eddie510-:
depends if u want to do a complete job. 5 too 600 bucks but this quote i got from a very bad ass shop in newark that do very good work
$600 for port work + $300 for heads and you're still $300 lower than a new set of Edelbrocks or Trickflows. [patriot]
A good valve job will cost you at least $400.
 
Posted by Blind (Member # 3052) on :
 
quote:
Originally posted by Stan G:
Blind " I made 249hp/296tq"

How the hell did you do that ?

Those are awfully good numbers !
http://i40.photobucket.com/albums/e237/blindbatts/mustang/89dyno2.jpg

stock `87 motor, stock tb/intake/rockers/e7s/cam/etc, but with `89 MAF harness and A9L ecu, no a/c, no p/s, pullies, electric fan, 3g alt, stock airbox and tube with k&n filter but no air silencer, pro-m 19lb MAF, timing at 14*btdc base, long tubes, dr. gas o/r x-pipe, dynomax superturbo catback

the car ran a 13.1 @ 104mph with a 1.71 60' in that trim

my buddy 'coupester' on corral ran 12.95 or something with his stock e7 car, and made 245rwhp / 320rwtq, his had a good 3 angle valve job done on the heads though, mine are untouched ~100k mile heads...
 
Posted by 87TURBO (Member # 9257) on :
 
gt40 heads non ported, e cam,explore or cobra non poted intake,small turbo 12psi 500+rw 550+tq fursure! y spent 1100 on aluminum heads if the stock block only holds 500rw! i seen gt40 heads for only $300 used and eplore intake for $250 if u are in a buget is the way two go cheap and fast
 
Posted by BlowN67 (Member # 4229) on :
 
an i got both forsale too gt40 irons an explorer intake lmk
 
Posted by 87TURBO (Member # 9257) on :
 
quote:
Originally posted by BlowN67:
an i got both forsale too gt40 irons an explorer intake lmk
i already have extra set! but thats a good set up
 
Posted by Duncan Motors (Member # 7045) on :
 
clean out the exaust bump does a lot for these and the e7 heads , this will cost 150 bucks, by me. if u want the heads 100 percent rebuilt, take them to frams machine shop, an when he breaks down the heads an inspects them for what they need he will tell u a price<price unknown for the state of there condition>. for an additional 300 bucks while the heads are broken down by him ,he will send them to me , then i fully clean up an bowl blend behind the vavles, cut out the bumps in the exaust an smooth an partially reshape out the exaust runner <they suck stock> port match the intake to whatever intake gasket your runnin.this is about the best there gonna get for the money, before your like i should have bought after market heads. when im done with the heads i send them back to frams machine shop an then he does his thing reassmbling.call if interested been doin it for years with great results. 707 297 0868
 
Posted by HaulinAss Motorsports (Member # 541) on :
 
quote:
Originally posted by Notch1320:
Depends on what number you have in mind? I have seen stock unported, stock valve size GT-40's in the 10.30's in an N/A configuration... and I am sure others have gone quicker.
You must be referring to Stock Eliminator Cars. There would be NO other way to have a stock valved,unported GT40 running 10 anyting any other way NA. Those guys have THOUSANDS into their combos to make a stock head do anything, and most of it is in the cam/shortblock but still an untouched head those numbers are damn near unatainable

I had a BADASS set of Panhandle Peformance GT40 Heads that were worked as far as humanly possible and they still only had 280 flow numbers. They did have stock valve size. These were ran on a stock eliminator car where they had to utilize stock casting,vlave size etc....
 
Posted by Notch1320 (Member # 2647) on :
 
Yes, Stock Eliminator cars. There are several GT-40 headed cars, and a handfull of E7 cars in Stock Eliminator that run some very impressive numbers. Evan Smith (93 Cobra)is in the 10.80 range, and quicker at race weight. Stripped down without the added weight, stock seats, and other heavy required stock items can return some extremely low numbers. Low 10's are very possible! These cars retain stock lift camshafts as well. Look at the NMRA Factory Stock guys. they have quite a few different rules, but the class champion for the last few years runs an E7 headed combo, and has been destroying the GT40 headed cars, along with the 2V and 4V cars. Learning to pull every ounce of power out of something is not cheap, and can be frustrating, but it can be done.
 
Posted by HaulinAss Motorsports (Member # 541) on :
 
quote:
Originally posted by Notch1320:
Yes, Stock Eliminator cars. There are several GT-40 headed cars, and a handfull of E7 cars in Stock Eliminator that run some very impressive numbers. Evan Smith (93 Cobra)is in the 10.80 range, and quicker at race weight. Stripped down without the added weight, stock seats, and other heavy required stock items can return some extremely low numbers. Low 10's are very possible! These cars retain stock lift camshafts as well. Look at the NMRA Factory Stock guys. they have quite a few different rules, but the class champion for the last few years runs an E7 headed combo, and has been destroying the GT40 headed cars, along with the 2V and 4V cars. Learning to pull every ounce of power out of something is not cheap, and can be frustrating, but it can be done.
Yeah years back I had a buddy that ran stock elim truck. with a 360 Mopar and 5k pound truck with all factory offered parts that thing would dip into the 11's occasionaly . Thoe guys have some ideas that if they were adapated to whats available, could make some seriouly amazing power.
 
Posted by Notch1320 (Member # 2647) on :
 
My car will be in the 11.70-.80 range by the end of the year. E7TE's!!!!
 




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