331 and GT40P Heads

coffey_5.0 · February 6th, 2009, 11:53 AM

I have a stock 302 block I am looking at putting a 331 kit in. I currently have GT40P heads, so will these work at all with the kit? I know there is better, but cash flows is always an issue.

95StangMX · February 6th, 2009, 12:25 PM

if cash flow is an issue you might want to rethink stroking it cause you are going to need to spend a lot more on supporting mods...and why 331 and not 347 if you are going to do it might as well go 347

coffey_5.0 · February 6th, 2009, 12:41 PM

What other supporting mods would i need?

93mustank · February 6th, 2009, 12:45 PM

302 parts make 302 power

Smirnoff · February 6th, 2009, 12:50 PM

Fuel system, block machining, maf and throttle body upgrades. The list goes on

93hatch · February 6th, 2009, 12:52 PM

fuck that car prob would barely get any faster for the 2k you spend on the stroker kit if you dont get better heads

95StangMX · February 6th, 2009, 01:02 PM

yeah thats what I am saying with those heads its not worth doing the stroker. I would spend the stroker money on better heads then stroke it later

93hatch · February 6th, 2009, 01:03 PM

Originally Posted by 95StangMX

yeah thats what I am saying with those heads its not worth doing the stroker. I would spend the stroker money on better heads then stroke it later

agreed nizzle, better heads ran on the 302 for now, then just swap them onto the 347

coffey_5.0 · February 6th, 2009, 01:21 PM

The thing is i need a new pistons on it now, the old ones have some knicks om to of them. So i was going to replace the whole rotating assembly, but i cant seem to find a stock kit. All i have found were upgrades, and i didnt want to go that far just yet.

2002BLGT · February 6th, 2009, 01:24 PM

Originally Posted by coffey_5.0

The thing is i need a new pistons on it now, the old ones have some knicks om to of them. So i was going to replace the whole rotating assembly, but i cant seem to find a stock kit. All i have found were upgrades, and i didnt want to go that far just yet.

how bad are the knicks , post up pics ? even if its just pistons , get pistons and a better set of heads will be faster than running a 331 on those heads

93hatch · February 6th, 2009, 01:46 PM

get a junkyard shortblock

coffey_5.0 · February 6th, 2009, 01:49 PM

here is one side, but the other side has about the same amount on the rear piston.

93hatch · February 6th, 2009, 01:54 PM

sand it down and drive the bitch

grnstang · February 6th, 2009, 02:08 PM

how much would you pay for my 62,000 mi 302 rotating assembly? Never sprayed or blown, best i have ran is in my sig, just a bolt on car

2002BLGT · February 6th, 2009, 02:08 PM

Originally Posted by coffey_5.0

here is one side, but the other side has about the same amount on the rear piston.

what made the pits in it ? drop a valve ?

r.barn · February 6th, 2009, 02:25 PM

Stroker kits are a waste unless you are going to throw big H/C/I on to feed it.

95StangMX · February 6th, 2009, 02:36 PM

I dont think you realize the amount of money that stroker kit is going to cost in the end and you are gonna run like crap constricted by those heads. Replace the pistons, no need for a full rotating assembly swap unless your crank is damaged. I would do new pistons and rings, maybe rods if needed... just enough to get it back in decent shape and spend the stroker money on some good heads. then later do the rebuild and the stroker kit....

86er · February 6th, 2009, 02:42 PM

Originally Posted by 2002BLGT

what made the pits in it ? drop a valve ?

more than likely a lot of detonation in there.

February 6th, 2009, 11:53 AM	#1
coffey_5.0 Newbie 1990 Mustang GT Join Date: Jul 2007 Location: Augusta, GA Posts: 32 iTrader: 0 reviews	331 and GT40P Heads I have a stock 302 block I am looking at putting a 331 kit in. I currently have GT40P heads, so will these work at all with the kit? I know there is better, but cash flows is always an issue.

February 6th, 2009, 12:25 PM	#2
95StangMX MM Fanatic 95 Mustang GT depends how many people are pushing Join Date: Oct 2007 Location: Playa del Carmen, Mexico Posts: 3,243 iTrader: 0 reviews	if cash flow is an issue you might want to rethink stroking it cause you are going to need to spend a lot more on supporting mods...and why 331 and not 347 if you are going to do it might as well go 347 __________________ People should think about boarding up their glass house before starting a rock fight!

February 6th, 2009, 12:45 PM	#4
93mustank Banned Join Date: Aug 2008 Location: Phoenix,AZ Posts: 3,014 iTrader: 1 reviews	302 parts make 302 power __________________ PeteAndersonRacing.com

February 6th, 2009, 12:52 PM	#6
93hatch Banned 1992 Lx 11.39@119.24 Join Date: Jan 2008 Location: Az Posts: 11,644 iTrader: 0 reviews	fuck that car prob would barely get any faster for the 2k you spend on the stroker kit if you dont get better heads __________________ [QUOTE=93mustank;2577445]We speed tested my right arm for quickness in shifts... So he could design the cam for proper shift recovery.[/QUOTE]

February 6th, 2009, 01:02 PM	#7
95StangMX MM Fanatic 95 Mustang GT depends how many people are pushing Join Date: Oct 2007 Location: Playa del Carmen, Mexico Posts: 3,243 iTrader: 0 reviews	yeah thats what I am saying with those heads its not worth doing the stroker. I would spend the stroker money on better heads then stroke it later __________________ People should think about boarding up their glass house before starting a rock fight!

February 6th, 2009, 12:41 PM	#3
coffey_5.0 Newbie 1990 Mustang GT Join Date: Jul 2007 Location: Augusta, GA Posts: 32 iTrader: 0 reviews	What other supporting mods would i need?

February 6th, 2009, 12:50 PM	#5
Smirnoff Enthusiast 1982 GT t-top no proof of purchase Join Date: May 2008 Location: N.E.PA Posts: 717 iTrader: 0 reviews	Fuel system, block machining, maf and throttle body upgrades. The list goes on

February 6th, 2009, 01:21 PM	#9
coffey_5.0 Newbie 1990 Mustang GT Join Date: Jul 2007 Location: Augusta, GA Posts: 32 iTrader: 0 reviews	The thing is i need a new pistons on it now, the old ones have some knicks om to of them. So i was going to replace the whole rotating assembly, but i cant seem to find a stock kit. All i have found were upgrades, and i didnt want to go that far just yet.

February 6th, 2009, 01:46 PM	#11
93hatch Banned 1992 Lx 11.39@119.24 Join Date: Jan 2008 Location: Az Posts: 11,644 iTrader: 0 reviews	get a junkyard shortblock __________________ [QUOTE=93mustank;2577445]We speed tested my right arm for quickness in shifts... So he could design the cam for proper shift recovery.[/QUOTE]

February 6th, 2009, 01:49 PM	#12
coffey_5.0 Newbie 1990 Mustang GT Join Date: Jul 2007 Location: Augusta, GA Posts: 32 iTrader: 0 reviews	here is one side, but the other side has about the same amount on the rear piston. Attached Thumbnails

February 6th, 2009, 01:54 PM	#13
93hatch Banned 1992 Lx 11.39@119.24 Join Date: Jan 2008 Location: Az Posts: 11,644 iTrader: 0 reviews	sand it down and drive the bitch __________________ [QUOTE=93mustank;2577445]We speed tested my right arm for quickness in shifts... So he could design the cam for proper shift recovery.[/QUOTE]

February 6th, 2009, 02:08 PM	#14
grnstang Hardcore Enthusiast 91 LX 13.7@101 Join Date: Oct 2008 Location: Norwalk OH Posts: 1,426 iTrader: 1 reviews	how much would you pay for my 62,000 mi 302 rotating assembly? Never sprayed or blown, best i have ran is in my sig, just a bolt on car __________________

February 6th, 2009, 02:25 PM	#16
r.barn Regular 1989 LX Vert - 1993 Notch Fast Join Date: May 2008 Location: Houston Posts: 398 iTrader: 0 reviews	Stroker kits are a waste unless you are going to throw big H/C/I on to feed it. __________________ The last President elected in anger of previous President was ....... Jimmy Carter God Help Us

February 6th, 2009, 02:36 PM	#17
95StangMX MM Fanatic 95 Mustang GT depends how many people are pushing Join Date: Oct 2007 Location: Playa del Carmen, Mexico Posts: 3,243 iTrader: 0 reviews	I dont think you realize the amount of money that stroker kit is going to cost in the end and you are gonna run like crap constricted by those heads. Replace the pistons, no need for a full rotating assembly swap unless your crank is damaged. I would do new pistons and rings, maybe rods if needed... just enough to get it back in decent shape and spend the stroker money on some good heads. then later do the rebuild and the stroker kit.... __________________ People should think about boarding up their glass house before starting a rock fight!

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