installing GT 40 heads

surfsup · 06-05-2006, 09:04 PM

I’m going to install my S V O GT 40 heads, the only thing is the block is an 86, and the heads I took off are E5, will I have to notch my pistons for these heads to work? And if I do can I put one notch across the valve area on the piston, or do I need to put four separate notches like the stock piston?

Dark Knight · 06-06-2006, 09:23 AM

Depends on the cam. Check the clearance while it's apart. And no, you dont need all four notches, there are four so that the pistons can go on either side of the engine...

surfsup · 06-06-2006, 10:41 PM

I'm going to install an e cam with the heads, not sure on which rockers, i was thinking about using 1.7 to increase the size of the cam.

Coupe50h · 06-13-2006, 06:43 PM

what are "svo gt-40" heads? valve size, iron?

Well, I would not run an e-cam with an 86 block, the pistons will probaly hit, or it would be so close....well, at least check it, if it will hit just have them notched, you can do it with the pistons in the holes i believe.
later

surfsup · 06-14-2006, 01:48 PM

Aluminum 1.94 and 1.64 I believe there Y303 castings

06-05-2006, 09:04 PM	#1
surfsup Registered Member Join Date: Sep 2004 Location: jersey Posts: 147	installing GT 40 heads I’m going to install my S V O GT 40 heads, the only thing is the block is an 86, and the heads I took off are E5, will I have to notch my pistons for these heads to work? And if I do can I put one notch across the valve area on the piston, or do I need to put four separate notches like the stock piston?

06-06-2006, 09:23 AM	#2
Dark Knight Registered Member Join Date: Oct 1998 Location: Az Posts: 854	Re: installing GT 40 heads Depends on the cam. Check the clearance while it's apart. And no, you dont need all four notches, there are four so that the pistons can go on either side of the engine... __________________ 84 convt,roller 302,AFR's, performer 3.55's, underdrives BBK shorties stock cam, 1.7's 13.58@102.84 and a '68 stang .. project 8 sec street car... 557 big block + N20 :-) http://members.cox.net/darkknight302/68nwrear.jpg

06-06-2006, 10:41 PM	#3
surfsup Registered Member Join Date: Sep 2004 Location: jersey Posts: 147	Re: installing GT 40 heads I'm going to install an e cam with the heads, not sure on which rockers, i was thinking about using 1.7 to increase the size of the cam.

06-13-2006, 06:43 PM	#4
Coupe50h Registered Member Join Date: Aug 2002 Location: SanAntonio, Tx Posts: 957	Re: installing GT 40 heads what are "svo gt-40" heads? valve size, iron? Well, I would not run an e-cam with an 86 block, the pistons will probaly hit, or it would be so close....well, at least check it, if it will hit just have them notched, you can do it with the pistons in the holes i believe. later __________________ X-Texas highway patrol ssp 1990 coupe - exploder Gt-40 iron heads, Explorer intake, 19 lber's. E-cam. crane 1.7 rollers. 190fp. 75mm maf. 65mm tb, tubular subframe connectors, mac cai, Asp crank pulley, T-5, king cobra clutch, flowtech 1-5/8 unequals, mac X-pipe Frpp driveshaft, lakewood Lca's. race weight 3,160 12.69 @ 107.35, 1.71 60' 26x8.5 drag's 3.90 gear 13.20 @ 106.91 - 235/60/15 firestones 2.3 60' 3.27 gear

06-14-2006, 01:48 PM	#5
surfsup Registered Member Join Date: Sep 2004 Location: jersey Posts: 147	Re: installing GT 40 heads Aluminum 1.94 and 1.64 I believe there Y303 castings

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