| FAQ |
| Members List |
| Social Groups |
| Calendar |
| Search |
| Today's Posts |
|
#1
01-24-2012, 10:09 PM
|
||||
|
||||
Under The Covers - stock height
Busy choosing parts for a 400ci rebuild for my Firebird.
I want to keep the mill "simple looking", not necessarily 100% factory correct, just simple. I definitely want stock height valve covers & I need some advise on what can & cannot fit under them. I plan on using comp #1451 1.5 roller tip rockers with ARP #135-7101 BB Chevy rocker studs (7/16 & 1.75" long). Valve spring install height will be just at 1.600" with stock length Ferrea valves. Will I get away with these? Will I be able to use polylocks at all? The ARP polylocks #300-8242 are 1.2" length, are there shorter ones that'll work? Thanks
__________________
69 Pontiac Firebird 400 convertible - project 69 Pontiac GTO 400 - sold 70 Buick Skylark 350 custom - project 72 Pontiac GTO 455 - sold |
|
#2
01-24-2012, 10:19 PM
|
|||
|
|||
|
I run stock cover with 660 valve lift with 1.65 H&S full roller rockers with thick valve gaskets.Tom
|
|
#3
01-24-2012, 10:26 PM
|
||||
|
||||
|
Thick gaskets (5/16") will allow most anything suitable for a street car to fit under stock valve covers.
__________________
1966 GTO 1969 Lemans Convertible- F.A.S.T. legal family cruiser. 12.59 on G70-14 Polyglas tires. 1.78 60' 1969 Bonneville Safari- cross country family cruiser. . 1979 Trans Am 400, 4-speed, 4 wheel disc. View from the drivers seat racing down Atco Raceway- http://www.youtube.com/watch?v=GhYDMdOEC7A Ride along in the other lane-http://www.youtube.com/watch?v=mIzgpLtF_uw |
|
#4
01-25-2012, 07:35 AM
|
|||
|
|||
|
I run stock height covers with 1.5 roller rockers and stock length Ferrea valves and don't need a thicker gasket.
__________________
 73 firebird 455 6x-4 heads 350 turbo 3.73 gears 1/8 7.65 @ 90.95 1/4 11.96 @ 112.60 new best in 1/8th 7.57@91 mph(4-13-12) |
|
#5
01-26-2012, 07:32 PM
|
||||
|
||||
|
Thanks guys, thats very helpful info
__________________
69 Pontiac Firebird 400 convertible - project 69 Pontiac GTO 400 - sold 70 Buick Skylark 350 custom - project 72 Pontiac GTO 455 - sold |
|
#6
01-27-2012, 10:07 AM
|
||||
|
||||
If I have a lift issuse as that is the deal to woory about on the pushrod tip end. I use the Felpro #1627.
|
|
#7
01-27-2012, 12:44 PM
|
||||
|
||||
|
6X-4s 5.09 valves(so a little longer) and HS rockers with stock repop chrome valve covers no problems.
__________________
Skip Fix 1978 Trans Am original owner 10.99 @ 124 pump gas 455 E heads, NO Bird ever! 1981 Black SE Trans Am stockish 6X 400ci, turbo 301 on a stand 1965 GTO 4 barrel 3 speed project 2004 GTO Pulse Red stock motor computer tune 13.43@103.4 1964 Impala SS 409/470ci 600 HP stroker project 1979 Camaro IAII Edelbrock head 500" 695 HP 10.33@132 3595lbs |
|
#8
01-27-2012, 01:41 PM
|
||||
|
||||
|
Quote:
I was told by a dealer that the 1.900" rocker studs are too long for stock covers & that polylocks also wouldnt work, hence my questions. Dont all HS roller rockers come with polylocks? So if they work im sure I can use polylocks with comp roller tips? Thanks for the advice
__________________
69 Pontiac Firebird 400 convertible - project 69 Pontiac GTO 400 - sold 70 Buick Skylark 350 custom - project 72 Pontiac GTO 455 - sold |
| Reply |
|
|
The PY Online Forums is the largest online gathering of Pontiac enthusiasts anywhere in the world. Founded in 1991, it was also the first online forum for people to gather and talk about their Pontiacs. Since then, it has become the mecca of Pontiac technical data and knowledge that no other place can surpass.
Linear Mode
