new heads or rework old ones?

stangbang · 02-17-2004, 03:20 PM

I have a 347 stroker with holley heads.These heads were fine on my motor before I stroked it ,but I think that I might get more power from something bigger.These heads have 1.90 intake valves.Should I have them reworked with bigger valves,or should I just get new ones like the afr 185's? Is it even possible to put bigger valves in the holley's?

Dark_5.0 · 02-17-2004, 03:55 PM

If it were me I would go with the AFR 185's and sell the Holleys. The AFR's would probably make substantially more power.

PWR_RYD93 · 02-18-2004, 10:16 AM

I agree, sell the Holleys and buy some AFR185's. The difference in price will be less than you would invest in larger valves, cutting the valve seats, blending the bowls to the seats, porting runners, etc. The Holley heads are very good heads, just a bit too small for 347 cid. You should easily be able to sell them for $750-800. Your motor will scream with a set of 185's if you have the right supporting parts (intake, cam, T.B., MAF, exhaust, etc.).

02-17-2004, 03:20 PM	#1
stangbang Registered Member Join Date: Oct 1999 Location: brunswick,ohio Posts: 135	new heads or rework old ones? I have a 347 stroker with holley heads.These heads were fine on my motor before I stroked it ,but I think that I might get more power from something bigger.These heads have 1.90 intake valves.Should I have them reworked with bigger valves,or should I just get new ones like the afr 185's? Is it even possible to put bigger valves in the holley's?

02-17-2004, 03:55 PM	#2
Dark_5.0 Registered Member Join Date: Apr 2001 Location: Staging lane Posts: 4,337	If it were me I would go with the AFR 185's and sell the Holleys. The AFR's would probably make substantially more power. __________________ 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

02-18-2004, 10:16 AM	#3
PWR_RYD93 Registered Member Join Date: Sep 1998 Location: IL Posts: 1,155	I agree, sell the Holleys and buy some AFR185's. The difference in price will be less than you would invest in larger valves, cutting the valve seats, blending the bowls to the seats, porting runners, etc. The Holley heads are very good heads, just a bit too small for 347 cid. You should easily be able to sell them for $750-800. Your motor will scream with a set of 185's if you have the right supporting parts (intake, cam, T.B., MAF, exhaust, etc.). __________________ Craig Supercharged 93 GT "I drive way too fast to worry about cholesterol!" Then I went to the doctor.... whoa 312! Hello Lipitor

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Help I need heads!!	SmokinStangGT	Windsor Power	18	05-04-2003 10:05 PM
New FRP Heads for 96 - 98 4.6	surfbeast	Modular Madness	9	11-21-2002 07:02 PM
will 99-2002 cams out of the pi heads fit in the 96-98 stock heads	slow98	Modular Madness	6	10-25-2002 04:28 PM
GT-40 heads	5.0 Pony	Windsor Power	1	09-10-2002 10:26 PM
Which heads are beter?	patman	Classic Mustangs	3	12-02-1999 03:42 AM