gt 40 heads

[95gtdrop]

i have an opportunity to buy some gt40 heads. non p. i want to put them on my 95gt. i already have a t-moss ported cobra upper/lower intake. i want to run just a mild cam ( E-cam, comp, or trick flow) how much work should i have done to these heads? i dont plan on changing anythiong on the lower end of things like pistons or crank. just a basic HC swap. and i also will be putting on bassani equal length headers.
thanks

 

[LAFENATU]

Depends on what you are looking for.

At the very least, I would take them to a machine shop and see how the valve seals are and install a set of springs that can support a cam. The Trick Flow valve spring upgrade for stock Ford cast iron heads is the best deal, hands down.

 

[95gtdrop]

Would u be asking to much if I wanted to get 300hp outta that setup?

 

[97 king cobra]

A few people have made 300rwhp w/ the cobra/explorer h/i and a decent cam but port work is a must. Also you would need a 5 spd to get the max hp out of the engine, good custom tune, nice weather, etc..... There is a reason why only a handful of people have made that number when thousands have a similar setup.

Id say 280-285rwhp is what u could expect w/ some decent porting.

 

[LAFENATU]

Would u be asking to much if I wanted to get 300hp outta that setup?

I made 281 with fully ported GT40's with my 92 LX. Here was my setup..

K&N Panel filter
75mm MAF
70mm TB
GT40 Tubular Intake
Fully Ported GT40 heads
BBK Shorty Headers
Mac Prochamber
Flowmaster 2-chamber Catback
Cobra 1.7 Roller Rockers
Crane 2031 Cam
3.73's
T5

 

[95gtdrop]

Ok nice. I have a 5 speed.
70mm tb
ported cobra intake
bassani equal length headers
bassani x pipe
355 gears
and plan on a good cam and a custom tune afterwards.
Maybe 24lb injectors? And adustable fpr?

 

[Win]

Ok nice. I have a 5 speed.
70mm tb
ported cobra intake
bassani equal length headers
bassani x pipe
355 gears
and plan on a good cam and a custom tune afterwards.
Maybe 24lb injectors? And adustable fpr?

You would def want to go 24lb and get a tune to max out your HP

 

[95gtdrop]

Ok for sure. How much can the stock lower end hold up to?
I don't really plan on racing it. It's my weekend warrior. Buy I like to take it on longer drives. It might see the drag strip 2 times a year if that.

 

[auto_x5.0]

I've heard the stock lower end holding up to close to 500hp...correct me if Im wrong though.

 

[Win]

If your just doing GT40's you should be fine with a stock block.

 

[95gtdrop]

Ok cool I think imma get em then, and port the shit outta them.

 

[95gtdrop]

Wht roller rockers do you all reccomend?

 

[Win]

Wht roller rockers do you all reccomend?

Make your spring choice and rocker choice when you choose your cam.

 

[95gtdrop]

Cool thanks

 

[CVictor]

Mine were milled as far as they could go pretty much, 331, NOT ported (former factory stock car), made 340/370 (100 octane), 35* timing.

I'd think you could get close to 300hp

 

[97 king cobra]

Mine were milled as far as they could go pretty much, 331, NOT ported (former factory stock car), made 340/370 (100 octane), 35* timing.

I'd think you could get close to 300hp

How did that factory stock car run? Those cars are crazy going high 10's low 11's on pretty much a 3200lb cobra, stock style suspension!

 

[CVictor]

Mine were milled as far as they could go pretty much, 331, NOT ported (former factory stock car), made 340/370 (100 octane), 35* timing.

I'd think you could get close to 300hp

How did that factory stock car run? Those cars are crazy going high 10's low 11's on pretty much a 3200lb cobra, stock style suspension!

Yes they are! I couldn't do it, too many restrictions. The former owner ran an 11.8 with a proshifted trans, 306, unported gt40 heads. This was years ago, nowadays they are much faster. The car now has more cubes, faceplated trans, coilovers and tubular K member, bunch of goodies that FS doesn't allow.