GT40P heads and 1.7 rockers ? - Page 2

tmoss · 10-02-2006, 10:41 PM

GT40P chambers are smaller than E7s. GT40 chambers are larger than GT40P.

Ninety5five0 · 10-03-2006, 10:37 AM

1979bruiser, i'm looking for the size of the bolt that screws into the head that holds the rocker, i think its 5/16, i looked up rockers for an explorer ( year with P head ) and it said 5/16 bolt, so i'm guessing thats what it is.

tmoss · 10-03-2006, 12:21 PM

yes, you can use stock pedistals on the P heads, so it should be 5/16"

1979bruiser · 10-03-2006, 06:18 PM

yup-yup.....sho is.

Ninety5five0 · 10-03-2006, 06:32 PM

So i go up to summit today and ask for 1.6 rockers, and i'm on the way home and they gave me 1.7's. I'm pretty sceptical about using these, but i dont want to make another trip back to summit.
I'm cofused on how to check if they'll clear or not.
Anyone have the same heads and cam as me ?

GT40P heads, Trickflow stage1 cam.

1989GT · 10-04-2006, 07:38 AM

Do a search for checking piston to valve clearance, there's a couple different ways to do it.

Ninety5five0 · 10-04-2006, 11:52 AM

I found a good site taht explains it in 2 different ways.

10-02-2006, 10:41 PM	#21
tmoss Registered Member Join Date: Mar 2003 Location: Saint Louis, MO Posts: 634	Re: GT40P heads and 1.7 rockers ? GT40P chambers are smaller than E7s. GT40 chambers are larger than GT40P. __________________ Tom (Torque) Moss 88Gt 5spd Vert, FLowmaster Catbacks, stock cam advanced 4° @ 108.5° ICL, NMRA prepped GT40P heads 1.85/1.55 valves and 1.7 rockers, MAC P headers Jet-Hot coated, 97 Exlporer intake (ported lower), TB and injectors. 277RWHP/330RWTQ (SAE). http://www.fastlanecars.com/

10-03-2006, 10:37 AM	#22
Ninety5five0 Registered Member Join Date: Sep 2006 Posts: 11	Re: GT40P heads and 1.7 rockers ? 1979bruiser, i'm looking for the size of the bolt that screws into the head that holds the rocker, i think its 5/16, i looked up rockers for an explorer ( year with P head ) and it said 5/16 bolt, so i'm guessing thats what it is.

10-03-2006, 12:21 PM	#23
tmoss Registered Member Join Date: Mar 2003 Location: Saint Louis, MO Posts: 634	Re: GT40P heads and 1.7 rockers ? yes, you can use stock pedistals on the P heads, so it should be 5/16" __________________ Tom (Torque) Moss 88Gt 5spd Vert, FLowmaster Catbacks, stock cam advanced 4° @ 108.5° ICL, NMRA prepped GT40P heads 1.85/1.55 valves and 1.7 rockers, MAC P headers Jet-Hot coated, 97 Exlporer intake (ported lower), TB and injectors. 277RWHP/330RWTQ (SAE). http://www.fastlanecars.com/

10-03-2006, 06:18 PM	#24
1979bruiser Registered Member Join Date: Aug 2006 Location: budds creek md Posts: 100	Re: GT40P heads and 1.7 rockers ? yup-yup.....sho is.

10-03-2006, 06:32 PM	#25
Ninety5five0 Registered Member Join Date: Sep 2006 Posts: 11	Re: GT40P heads and 1.7 rockers ? So i go up to summit today and ask for 1.6 rockers, and i'm on the way home and they gave me 1.7's. I'm pretty sceptical about using these, but i dont want to make another trip back to summit. I'm cofused on how to check if they'll clear or not. Anyone have the same heads and cam as me ? GT40P heads, Trickflow stage1 cam.

10-04-2006, 07:38 AM	#26
1989GT Registered Member Join Date: Apr 1999 Location: Cincinnati,OH Posts: 1,511	Re: GT40P heads and 1.7 rockers ? Do a search for checking piston to valve clearance, there's a couple different ways to do it. __________________ 89GT,Pro-Bullet 306, H/C/I and a bunch of other stuff. Sold 00GT, Vortech S-Trim, Steeda Boost Pipe, C&L intake, Mac off-road H-pipe, Flowmasters, B&M Ripper shifter, Eibach Sportline springs, Koni Struts/shocks, MM full length subframe connectors, Cobra brakes, 3.73's. My Car Domain Page

10-04-2006, 11:52 AM	#27
Ninety5five0 Registered Member Join Date: Sep 2006 Posts: 11	Re: GT40P heads and 1.7 rockers ? I found a good site taht explains it in 2 different ways.