Rockers?
Le Mans Master
Joined: Jun 2006
Posts: 5,642
Likes: 5
From: One day you're a Comet...the next day you're dust... Arkansas
Racer
Joined: Sep 2005
Posts: 271
Likes: 0
From: New Freedom PA
More Valve train Help Needed
Yes you should change your valve springs
(no one seems to have noticed that has been said allready!!)
The stock springs are about all that is stopping you from revving past 5,850 rpm. Change the springs and youre good for 1.6:1 RRs and also more revs. You can reuse the stock springs if ya like, after all, you own the car.
(no one seems to have noticed that has been said allready!!)
The stock springs are about all that is stopping you from revving past 5,850 rpm. Change the springs and youre good for 1.6:1 RRs and also more revs. You can reuse the stock springs if ya like, after all, you own the car.
1.rocker arms(roller tip or aluminum)?
2. brand(pro-form , harland sharp , edelbrock , crane , comp-cams)?
3. ratio(1.52 or1.6)?
4. will all this fit under my stock valve covers?
5. rocker adjustment (zero lash or 1/4 turn)? no guess here please
awaiting all you expert opinions
DESERT
Race Director
Joined: Jan 2002
Posts: 12,261
Likes: 85
From: O'Fallon Missouri
3. 1.6 ratio
4. No, not without cutting/grinding.
5. With stock hydraulic lifters you can go anywhere from 1/4 to a full turn past zero lash, I go 1/2 turn.
Le Mans Master
Joined: Jun 2006
Posts: 5,642
Likes: 5
From: One day you're a Comet...the next day you're dust... Arkansas
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Le Mans Master
Joined: Mar 2000
Posts: 8,950
Likes: 4
From: Lafayette LA
Yesterady I ordered a set of Comp 1.6 Pro Mags from Thunder Racing. Thunder is a Corvette forum supporting vendor, and they will meet Jegs price. The Thunder staff also has more experience with LT1 specific parts, and could give better tech advice on your valve springs.
Race Director
Joined: Jan 2002
Posts: 12,261
Likes: 85
From: O'Fallon Missouri
Melting Slicks
Joined: Apr 2003
Posts: 2,150
Likes: 6
From: NS
I did lots of research before going with LT4 springs and GMPP 1.6RR. If you run LT-1 springs with 1.6RR you are at the ragged edge of coil binding them. We measured the height my LT-1 springs would bind and we were well into the "unsafe" zone.
LT-4 springs were a perfect match. Slightly more seat pressure, about the same nose pressure, and a good margin before coil bind. So buy yourself a set of LT-4 springs with new shims, retainers and locks.
LT4 Kits - GM Part #s
12495494 - Springs (16 pack)
12495492 - Retainers (16 pack)
12495503 - Locks (32 pack)
10212809 - Shims (10 pack)
Racer
Joined: Sep 2005
Posts: 271
Likes: 0
From: New Freedom PA
Thank You
I did lots of research before going with LT4 springs and GMPP 1.6RR. If you run LT-1 springs with 1.6RR you are at the ragged edge of coil binding them. We measured the height my LT-1 springs would bind and we were well into the "unsafe" zone.
LT-4 springs were a perfect match. Slightly more seat pressure, about the same nose pressure, and a good margin before coil bind. So buy yourself a set of LT-4 springs with new shims, retainers and locks.
LT4 Kits - GM Part #s
12495494 - Springs (16 pack)
12495492 - Retainers (16 pack)
12495503 - Locks (32 pack)
10212809 - Shims (10 pack)
Desert
