1990 corvette question 1.6 rockers
Thread Starter
Instructor
Joined: Jan 2009
Posts: 123
Likes: 0
From: Lake Ariel PA
1990 corvette question 1.6 rockers
How much power would I obtain by changing the roller rockers to 1.6 on a stock engine. The engine was just rebuilt. Also what rockers would i use and do i need to change the valve covers?
Melting Slicks
Joined: Apr 2007
Posts: 2,678
Likes: 1
From: Atlanta Georgia
i dont know about the power you would obtain, but with the LT1 engine you can use the stock valve covers if you brake off some tabs. But if it was me i would just get new valve covers to be safe.
Pro
Joined: Jan 2004
Posts: 503
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From: Forney Texas
90Indy
Pro
Joined: Oct 2008
Posts: 706
Likes: 265
From: Jyväskylä, FINLAND
I used Scorpion's rockers and I did cut the drib tabs off. I also changed springs at the same time.
Check this thread:
http://forums.corvetteforum.com/c4-t...clearance.html
And here is my post, in which are my pictures of rockers installed and drib tabs cut off:
http://forums.corvetteforum.com/1567995257-post15.html
Drifting
Joined: Oct 2006
Posts: 1,934
Likes: 3
From: Citrus Heights California
I did this mod a while ago. First; I did a search on the web and found a lot of info. I found dyno slips that showed about 10 to 15 hp gain with 1.6 RRs on an otherwise stock L98.
I installed a Comp Pro Magnum kit with new push rods. They're quieter than the stock stamped 1.5 RRs. You can use your stock valve covers with a little modification or you can buy the tall aftermarket valve covers.
I installed a Comp Pro Magnum kit with new push rods. They're quieter than the stock stamped 1.5 RRs. You can use your stock valve covers with a little modification or you can buy the tall aftermarket valve covers.
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Team Owner
Joined: Sep 2001
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From: Athens AL
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Clearing the hood isnt the issue, clearing the other stuff in there is the bugger. Wiper motor might need to come out every time or even be repositioned, then theres the pain of some of the taller ones not letting you get to bolts.
You just re-use the stock cover, but you take a dremel to the guts inside so they'll clear. Sand and paint it and youre good to go.
They should provide between 10-15hp, which you wont feel, but it will show.
You just re-use the stock cover, but you take a dremel to the guts inside so they'll clear. Sand and paint it and youre good to go.
They should provide between 10-15hp, which you wont feel, but it will show.