Porting Stock Heads?

Whoapony94 · 04-08-2002, 11:22 AM

I am looking for a cheap way to do something about my restrictive stock heads heads. I am debating buying a used set and trying to open and smooth out exhaust ports at home with a Dremel. What would be a good set to look for? I hear about Explorer heads. What year car should I look for or casting number? What else would I need to do? Probably a 3 angle valve job and decking or something? Any rocker recommendations? Would they help? Any ideas or help would be great.

Dark_5.0 · 04-08-2002, 12:24 PM

Porting your stock heads is a good idea if you are going to do it yourself but, I would go with the Explorer heads they flow way better than your stock E7's.

I bought my E7's already ported and polished....So lets see...

Ported and polished E7's $220.00

3 angle valve job, high $190.00
performance valve springs
Teflon seals and milled
20 thousanths

I feel I got a good deal on my heads for a total or $410.00.....but the GT-40 heads that come stock on the explorers have way more potential and untouched they will flow a little better than my tricked out stock E7's.

Good luck,

Whoapony94 · 04-08-2002, 12:38 PM

So what year Explorer should I look for, do you know the casting number? Do I have to do anything or buy anything special to put them on my stock motor?

fast88 · 04-08-2002, 09:28 PM

You can buy the gt-40p heads that comeon the explorers for $639 a pair thats with .600 lift springs and manley valves and drilled for smog since the explorers don't run the thermactor pipe across the back of the head.

tireburner163 · 04-08-2002, 10:22 PM

Explorer's come with GT-40P heads. They flow good for the money, but you'll need special headers.

fiveohpatrol · 04-08-2002, 11:09 PM

summit has brand new assembled GT40-P's for $539.00.

as stated by 4-banger boy

, you will need a different set of headers that run about $200.

But if you want to port your stock heads, I'd highly suggest NOT using a dremel. You'll be porting for about a week straight that way.
When I did mine, I used a high speed die grinder with a carbide bit and I still put in about 11-12 hours of porting. Its worth it though, i like the look on peoples faces after I whoop their car and tell them its got stock heads

good luck,
-Drew

Whoapony94 · 04-09-2002, 06:47 AM

Fast88 you said drilled for smog? So I wouldn't be able to just buy a pair of GT-40P's and throw them on my car without doing that? And who makes these headers for the GT-40's? Anyone else have a better idea? I am really trying to build a budget street racer/rice cooker

04-08-2002, 11:22 AM	#1
Whoapony94 Registered Member Join Date: Mar 2002 Location: Virginia Beach, Va Posts: 20	Porting Stock Heads? I am looking for a cheap way to do something about my restrictive stock heads heads. I am debating buying a used set and trying to open and smooth out exhaust ports at home with a Dremel. What would be a good set to look for? I hear about Explorer heads. What year car should I look for or casting number? What else would I need to do? Probably a 3 angle valve job and decking or something? Any rocker recommendations? Would they help? Any ideas or help would be great. __________________ '94 GT Conv. Current Mods -K&N Perf Inj Kit -Mac Underdrive Pulleys -2 Chamber Flows -3.55 Gears

04-08-2002, 12:24 PM	#2
Dark_5.0 Registered Member Join Date: Apr 2001 Location: Staging lane Posts: 4,337	Porting your stock heads is a good idea if you are going to do it yourself but, I would go with the Explorer heads they flow way better than your stock E7's. I bought my E7's already ported and polished....So lets see... Ported and polished E7's $220.00 3 angle valve job, high $190.00 performance valve springs Teflon seals and milled 20 thousanths I feel I got a good deal on my heads for a total or $410.00.....but the GT-40 heads that come stock on the explorers have way more potential and untouched they will flow a little better than my tricked out stock E7's. Good luck, __________________ 92' LX-Big brakes, Lots and lots of suspension, GT40X heads, Ported cobra intake, stock cam, Vortech SC trim. 00' Lightning-Stock 88'CRX-13 second ego killer

04-08-2002, 12:38 PM	#3
Whoapony94 Registered Member Join Date: Mar 2002 Location: Virginia Beach, Va Posts: 20	So what year Explorer should I look for, do you know the casting number? Do I have to do anything or buy anything special to put them on my stock motor? __________________ '94 GT Conv. Current Mods -K&N Perf Inj Kit -Mac Underdrive Pulleys -2 Chamber Flows -3.55 Gears

04-08-2002, 09:28 PM	#4
fast88 Registered Member Join Date: Mar 2002 Location: Rockingham,N.C. Posts: 80	gt40-p You can buy the gt-40p heads that comeon the explorers for $639 a pair thats with .600 lift springs and manley valves and drilled for smog since the explorers don't run the thermactor pipe across the back of the head. __________________ 88 Notchback orig. 4 cylinder car with a efi v8 swap from a wrecked 89 5.0 hatch,edelbrock performer rpm's 190/160,typhoon intake,comp cams 1.6 rockers,65mm tb and spacer,pa performance c4 w/ 3000 stall,3.73's auburn pro, 31 spline mosers,mac off road h-pipe,1 5/8 shorties ,and 2 1/2 pro dumps,kirban fpr,190 lph walbrp. SOON TO BE BLOWN!

04-08-2002, 10:22 PM	#5
tireburner163 It's a lot like a race car Join Date: Aug 2000 Location: Meridian, MS Posts: 4,130	Explorer's come with GT-40P heads. They flow good for the money, but you'll need special headers. __________________ 1987 Buick T-type 1998 HD Electra Elide

04-08-2002, 11:09 PM	#6
fiveohpatrol I'd rather be basketweaving Join Date: Feb 2000 Location: Indianapolis Posts: 2,551	summit has brand new assembled GT40-P's for $539.00. as stated by 4-banger boy , you will need a different set of headers that run about $200. But if you want to port your stock heads, I'd highly suggest NOT using a dremel. You'll be porting for about a week straight that way. When I did mine, I used a high speed die grinder with a carbide bit and I still put in about 11-12 hours of porting. Its worth it though, i like the look on peoples faces after I whoop their car and tell them its got stock heads good luck, -Drew __________________ NMRA O/C 9516 NA pumpgas stickshift 347 10.65@125.6, 6.73@100, 1.41 60ft

04-09-2002, 06:47 AM	#7
Whoapony94 Registered Member Join Date: Mar 2002 Location: Virginia Beach, Va Posts: 20	Fast88 you said drilled for smog? So I wouldn't be able to just buy a pair of GT-40P's and throw them on my car without doing that? And who makes these headers for the GT-40's? Anyone else have a better idea? I am really trying to build a budget street racer/rice cooker __________________ '94 GT Conv. Current Mods -K&N Perf Inj Kit -Mac Underdrive Pulleys -2 Chamber Flows -3.55 Gears

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