GT to Cobra

Dave Maple · 11-07-2002, 10:54 PM

Can anyone tell me if it is possible to put '98' dual overhead cam heads on my '98' GT?

tireburner163 · 11-07-2002, 11:06 PM

The Deuce · 11-08-2002, 01:31 AM

You can get the same flow rate (ok, really close) with ported heads. I don't really know why you would want the extra valves.

Snakeman · 11-08-2002, 11:22 PM

AFAIK, the cast iron block in the GT is the same design as the aluminum block in the cobra of that year. the heads will fit, but you may need the exhaust and intake from the cobra also, as well as the different tensioners for the camshaft drive chain...

Dave Maple · 11-10-2002, 12:16 AM

Thanks for the response.

vetteeatr · 11-14-2002, 06:50 PM

Ok so it is or isnt?

If it is I would be changing the exhaust and morethen liekly the intake to a higher performance one anyway along with the heads.

So really could i take GT motor blocks basically and ptu 4 valve technology stuff on it?

WIll the aluminum block hold up better to power or the GT?

THanks

ylw99vert · 11-15-2002, 12:05 PM

It will fit, but you gonna be spending alot of money getting the rest of your accesories to line up and work correct.

Some of the mod shootout guys were running the cast block with the 4V heads, but they had serious cash into the cars.

Mustang92 · 11-15-2002, 02:54 PM

Okay let's clear up some confusion here. For starters yes you can put 4v heads on a 2v block. There is some modifications that have to be done but not impossible. As for why would you want 4v's if you hadn't noticed there are 11 second bolt-on Cobras out there no 2V has done it and never will with just bolt-ons.

You'll need more than heads and intake to make a 4v motor. 4V motors rev to 7K RPM all day long and a stock 2v rotating assembly will not handle that. Plus you will lose compression with the stock 2v pistons and 4v heads.

Roughly speaking you'll need: heads, intake, inlet tube, 24lb injectors, MAF, pistons, crank, timing chains, timing chain covers, radiator crossover tube, radiator hose, EEC recalibrated, alternator, accessory brackets, exhaust manifolds...

Bill

Dark_5.0 · 11-15-2002, 03:01 PM

The manifolds from my Cobra will be for sale in a couple weeks if anyone is interested. 9,000 miles on them

Later,

11-07-2002, 10:54 PM	#1
Dave Maple Registered Member Join Date: May 2002 Location: Indiana Posts: 17	GT to Cobra Can anyone tell me if it is possible to put '98' dual overhead cam heads on my '98' GT?

11-07-2002, 11:06 PM	#2
tireburner163 It's a lot like a race car Join Date: Aug 2000 Location: Meridian, MS Posts: 4,130	No __________________ 1987 Buick T-type 1998 HD Electra Elide

11-08-2002, 01:31 AM	#3
The Deuce Registered Member Join Date: Apr 2002 Location: Atlanta, GA Posts: 2,325	You can get the same flow rate (ok, really close) with ported heads. I don't really know why you would want the extra valves. __________________ 1997 Mustang GT "The Freak" - 13.80 @ 101.70, 2.07 60' 1995 Honda VFR750 - not much @ really fast (actual data pending.) 1964.5 Mustang 289 Rice Haters Club Member #13

11-08-2002, 11:22 PM	#4
Snakeman Registered Member Join Date: Apr 1999 Location: Grass Valley, CA, USA Posts: 1,389	AFAIK, the cast iron block in the GT is the same design as the aluminum block in the cobra of that year. the heads will fit, but you may need the exhaust and intake from the cobra also, as well as the different tensioners for the camshaft drive chain... __________________ LX ~vs~ Camaro

11-14-2002, 06:50 PM	#6
vetteeatr Registered Member Join Date: Apr 2001 Location: Olney, Illinois, USA Posts: 212	Ok so it is or isnt? If it is I would be changing the exhaust and morethen liekly the intake to a higher performance one anyway along with the heads. So really could i take GT motor blocks basically and ptu 4 valve technology stuff on it? WIll the aluminum block hold up better to power or the GT? THanks __________________ !988 GT World Windsor Sr.'s, Harland sharpe rockers, 3.73 gears, pulleys, no ac, hurst shifter, 10:1 pistons, BBK full length headers and H-pipe with flows. Under extensive work for porting and fly cutting to accept my new cam and to match my soon to have systemax intake DROOL Best E.T. 13.20 with edelbrock RPM intake and 70mm TB

11-10-2002, 12:16 AM	#5
Dave Maple Registered Member Join Date: May 2002 Location: Indiana Posts: 17	Thanks for the response.

11-15-2002, 12:05 PM	#7
ylw99vert Registered Member Join Date: Sep 2002 Location: St. Louis Posts: 16	It will fit, but you gonna be spending alot of money getting the rest of your accesories to line up and work correct. Some of the mod shootout guys were running the cast block with the 4V heads, but they had serious cash into the cars. __________________ Just another blown 4V 4.6 GT

11-15-2002, 02:54 PM	#8
Mustang92 Drag Racer! Join Date: Nov 1999 Location: Lake Worth, FL USA Posts: 757	Okay let's clear up some confusion here. For starters yes you can put 4v heads on a 2v block. There is some modifications that have to be done but not impossible. As for why would you want 4v's if you hadn't noticed there are 11 second bolt-on Cobras out there no 2V has done it and never will with just bolt-ons. You'll need more than heads and intake to make a 4v motor. 4V motors rev to 7K RPM all day long and a stock 2v rotating assembly will not handle that. Plus you will lose compression with the stock 2v pistons and 4v heads. Roughly speaking you'll need: heads, intake, inlet tube, 24lb injectors, MAF, pistons, crank, timing chains, timing chain covers, radiator crossover tube, radiator hose, EEC recalibrated, alternator, accessory brackets, exhaust manifolds... Bill __________________ 2000 GT VRS O/R X, Dynomax Bullets, Steeda Pulleys, Pro-M 80MM, 4.30s, UPR Pro Series Suspension, UPR Tubular K-member, MAC Longtubes, Bullitt Intake, TKO, VT Engine Stage 1 NA Cams, SCT Tune. 285 RWHP/296 RWTQ 11.97 @ 113.20 M/M 100, 7085 www.uprproducts.com www.ponyexpressperformance.com www.modulardepot.com

11-15-2002, 03:01 PM	#9
Dark_5.0 Registered Member Join Date: Apr 2001 Location: Staging lane Posts: 4,337	The manifolds from my Cobra will be for sale in a couple weeks if anyone is interested. 9,000 miles on them Later, __________________ 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

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