GT40P heads Reply #15 – June 10, 2012, 01:02:38 AM I honestly can't even remember if I truly checked to see if everything would fit or not. The valves ARE bigger than those of E7 heads. However, if you have a drill, a random big-enough valve (just get a chevy 2.02 valve from the store), and some adhesive-backed sandpaper, it's so unbelievably easy to cut eyebrows in your pistons *just* big enough to not affect balance, but make sure there is enough room.I am FINNNNALLY about to get the red car back out on the road, being spoiled with the black XR7 has led me to really drag ass on the few final steps. But I will be able to compare it, now with effectively a full GT40 setup, to when it had only an E7 setup. Whether you're comparing them to stock Mustang E7 heads, or especially stock Tbird/Cougar E6 heads, they are 100% worth buying, be sure you of course get the matching upper and lower intake, but power and torque overall jump up throughout the RPM range, and when it really winds up, the flow works for you and sends the motor wanting to go to redline and beyond. Quote Selected
GT40P heads Reply #16 – June 10, 2012, 03:21:36 AM Quote from: ZondaC12;391909I honestly can't even remember if I truly checked to see if everything would fit or not. The valves ARE bigger than those of E7 heads. However, if you have a drill, a random big-enough valve (just get a chevy 2.02 valve from the store), and some adhesive-backed sandpaper, it's so unbelievably easy to cut eyebrows in your pistons *just* big enough to not affect balance, but make sure there is enough room.I am FINNNNALLY about to get the red car back out on the road, being spoiled with the black XR7 has led me to really drag ass on the few final steps. But I will be able to compare it, now with effectively a full GT40 setup, to when it had only an E7 setup. Whether you're comparing them to stock Mustang E7 heads, or especially stock Tbird/Cougar E6 heads, they are 100% worth buying, be sure you of course get the matching upper and lower intake, but power and torque overall jump up throughout the RPM range, and when it really winds up, the flow works for you and sends the motor wanting to go to redline and beyond. XD...Does that mean i should consider performance spring and retainers..Man i cant wait till i get enough funds.. Quote Selected
GT40P heads Reply #17 – June 10, 2012, 10:54:53 AM You need new springs if those on the P heads are stock. Worth it. Quote Selected
GT40P heads Reply #18 – June 13, 2012, 10:54:37 PM The springs in the heads are for the cam in my car. You will have to change the springs for the specific ones that are recommended for the cam you're going to use. Quote Selected
GT40P heads Reply #19 – June 16, 2012, 09:14:51 PM Quote from: thunderjet302;392268The springs in the heads are for the cam in my car. You will have to change the springs for the specific ones that are recommended for the cam you're going to use.How much shipped to CA? Quote Selected
GT40P heads Reply #20 – June 18, 2012, 04:08:23 PM Quote from: INFAMOUSAPA;392499How much shipped to CA? PM me your zip and I'll let you know. Quote Selected
GT40P heads Reply #22 – July 06, 2012, 09:56:24 PM I cant beleave these arent sold yet! Quote Selected
GT40P heads Reply #25 – July 14, 2012, 07:12:52 PM I'd love to get the from ya Lou, but I don't think that 302 I have would handle them and the cam I have. How big of lift can those springs handle?? I have a .588 lift cam not doing anything. Quote Selected
GT40P heads Reply #26 – July 27, 2012, 12:15:10 AM A .588 lift cam would be too much. The springs are supposed to be good to .550 lift. I was just under that with my cam at .533 lift. With a .588 lift cam I would swap out the springs in the heads. Quote Selected
GT40P heads Reply #27 – July 29, 2012, 07:50:52 PM I was mistaken on the lift. I found the cam card and it's a .544 lift w/ 240/246 Dur @.50 lift. Duration at .006 is spec'd @ 284/296 :D Quote Selected
GT40P heads Reply #28 – July 30, 2012, 10:37:37 PM I think that the cam duration might be too much for the springs. My cam is only 210*I/215*E at .050. With the higher lift and more duration the cam might be too much for the springs. At any rate the springs are used so I would change them . Quote Selected
GT40P heads Reply #29 – October 05, 2012, 10:27:21 PM These are still in my garage if anyone wants them . Quote Selected
Topic: GT40P heads (Read 2360 times)
previous topic - next topic
