Ported Stock Heads...

FivepointOH · 03-10-2001, 05:46 PM

How much hp will ported stock heads(homeade ported) make? I was considering porting my stock heads and buying a cobra or trickflow intake.... how much hp gain would I see over ported vs non ported stock heads? What kind of power/ 1/4 times are you guys with ported stock heads making? N/A not blown or juiced...

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92 AOD GT, K&N, ram air, pulleys, 2 ch. flowmasters, 4:10's, shift kit, 1 5/8 mac longtubes and offroad hpipe 14.249 @ 97.34 mph before the headers and hpipe

84_GT350 · 03-11-2001, 01:00 AM

I've seen articles that said you can get 30hp or so out of stock heads...but that was a professional port job. I'd say you could look for 15 or 20 at most.

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1984 1/2 GT350 (#842 Hatchback w/ T-tops), 302HO, Comp cams Xtreme Energy cam, Carter 625cfm carb, Weiand Stealth intake, MSD distributor, MSD coil, FMS 9mm wires, 1 5/8" MAC unequal shorties, 2 1/2" MAC Prochamber H-pipe, Flowmaster 2 chambers, KYBs, 16"x8" 4 lug Cobra Rs, Falken 245/45ZR16s

buddha · 03-11-2001, 01:14 AM

Back when my car was still NA, I had the stock heads with a little exhuast porting. With these heads, 3.73's, 19lb injectors,GT-40, stick, and a set of slicks, the car went a best of 12.80 @ 105. The car is a full weight LX.

FivepointOH · 03-12-2001, 12:55 PM

ttt....come on there has to be more guys running ported stock heads out there... how do you guys like them? Did you do them yourself? Is it a noticeable increase(I keep hearing it's worth 20hp at least and it's basically free with just time...)

------------------
92 AOD GT, K&N, ram air, pulleys, 2 ch. flowmasters, 4:10's, shift kit, 1 5/8 mac longtubes and offroad hpipe 14.249 @ 97.34 mph before the headers and hpipe

Jaydee · 03-12-2001, 03:46 PM

Had mine 5 years ago by a friend who was pretty experienced at it. Cleand up both the intake and exhaust sides (nothing severe)15 to 20hp sounds about right. 13.89@100.25 was my best after the mods below but there is probably another two or three tenths left with a more aggresive launch and power shifting - tried hard not to kaboom the T5.

------------------
1965 K code coupe - numbers matching - restoration ongoing. 1987 LX notch, 5 spd, stock heads (minor porting) and intake, 65mmTB, 3.55's, ram air, pulleys, shorty's, 2.5" exhaust with cats 13.89@100.25

Jaydee · 03-12-2001, 03:47 PM

Had mine done 5 years ago by a friend who was pretty experienced at head work. Cleaned up both the intake and exhaust sides (nothing severe) and 15 to 20hp sounds about right. 13.89@100.25 was my best after the mods below but there is probably another two or three tenths left with a more aggresive launch and power shifting - tried hard not to kaboom the T5.

------------------
1965 K code coupe - numbers matching - restoration ongoing. 1987 LX notch, 5 spd, stock heads (minor porting) and intake, 65mmTB, 3.55's, ram air, pulleys, shorty's, 2.5" exhaust with cats 13.89@100.25

03-10-2001, 05:46 PM	#1
FivepointOH Registered Member Join Date: Jan 1999 Location: Sugar Land, Tx USA Posts: 478	Ported Stock Heads... How much hp will ported stock heads(homeade ported) make? I was considering porting my stock heads and buying a cobra or trickflow intake.... how much hp gain would I see over ported vs non ported stock heads? What kind of power/ 1/4 times are you guys with ported stock heads making? N/A not blown or juiced... ------------------ 92 AOD GT, K&N, ram air, pulleys, 2 ch. flowmasters, 4:10's, shift kit, 1 5/8 mac longtubes and offroad hpipe 14.249 @ 97.34 mph before the headers and hpipe

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03-11-2001, 01:00 AM	#2
84_GT350 Registered Member Join Date: Apr 1999 Location: Overland Park, KS, USA Posts: 1,631	I've seen articles that said you can get 30hp or so out of stock heads...but that was a professional port job. I'd say you could look for 15 or 20 at most. ------------------ 1984 1/2 GT350 (#842 Hatchback w/ T-tops), 302HO, Comp cams Xtreme Energy cam, Carter 625cfm carb, Weiand Stealth intake, MSD distributor, MSD coil, FMS 9mm wires, 1 5/8" MAC unequal shorties, 2 1/2" MAC Prochamber H-pipe, Flowmaster 2 chambers, KYBs, 16"x8" 4 lug Cobra Rs, Falken 245/45ZR16s

03-11-2001, 01:14 AM	#3
buddha Registered Member Join Date: Feb 2000 Location: Washington, MO Posts: 327	Back when my car was still NA, I had the stock heads with a little exhuast porting. With these heads, 3.73's, 19lb injectors,GT-40, stick, and a set of slicks, the car went a best of 12.80 @ 105. The car is a full weight LX.

03-12-2001, 12:55 PM	#4
FivepointOH Registered Member Join Date: Jan 1999 Location: Sugar Land, Tx USA Posts: 478	ttt....come on there has to be more guys running ported stock heads out there... how do you guys like them? Did you do them yourself? Is it a noticeable increase(I keep hearing it's worth 20hp at least and it's basically free with just time...) ------------------ 92 AOD GT, K&N, ram air, pulleys, 2 ch. flowmasters, 4:10's, shift kit, 1 5/8 mac longtubes and offroad hpipe 14.249 @ 97.34 mph before the headers and hpipe

03-12-2001, 03:46 PM	#5
Jaydee Registered Member Join Date: Sep 2000 Location: Conn. Posts: 220	Had mine 5 years ago by a friend who was pretty experienced at it. Cleand up both the intake and exhaust sides (nothing severe)15 to 20hp sounds about right. 13.89@100.25 was my best after the mods below but there is probably another two or three tenths left with a more aggresive launch and power shifting - tried hard not to kaboom the T5. ------------------ 1965 K code coupe - numbers matching - restoration ongoing. 1987 LX notch, 5 spd, stock heads (minor porting) and intake, 65mmTB, 3.55's, ram air, pulleys, shorty's, 2.5" exhaust with cats 13.89@100.25

03-12-2001, 03:47 PM	#6
Jaydee Registered Member Join Date: Sep 2000 Location: Conn. Posts: 220	Had mine done 5 years ago by a friend who was pretty experienced at head work. Cleaned up both the intake and exhaust sides (nothing severe) and 15 to 20hp sounds about right. 13.89@100.25 was my best after the mods below but there is probably another two or three tenths left with a more aggresive launch and power shifting - tried hard not to kaboom the T5. ------------------ 1965 K code coupe - numbers matching - restoration ongoing. 1987 LX notch, 5 spd, stock heads (minor porting) and intake, 65mmTB, 3.55's, ram air, pulleys, shorty's, 2.5" exhaust with cats 13.89@100.25