I pickup some 1.6 rockers today at LKQ. (Page 1/1)
hercimer01 MAY 27, 01:59 AM
They came from a 1994 Pontiac Grand Am.



It has the black plastic valve covers and you see them through the oil filler neck.
The newer 3100s have different rocker arms in them and the valve covers are aluminum.



They are stamped not billet.




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Project Genisis Lo Budget 3800SC swap
12.840@104.8 MPH Intense-Racing 1.9 rockers, 3" exhaust, 3.4 pulley, ZZP tune and 18 year old tires.

88 Coupe under construction SOLD

88 formula 3.4L 4t60 swap SOLD

88GT resurrection in progress.

Patrick MAY 27, 02:12 AM

A little late now... but it would've been best to have kept the balls with their original rocker.
hercimer01 MAY 27, 02:19 AM
I wondered about that.
sourmash MAY 27, 09:06 AM
So, I'm assuming these can be used with the stock 2.8 and 3.4 push rod engines? Any other mods that should be used with them, like springs?
Patrick MAY 27, 01:20 PM

quote
Originally posted by sourmash:

Any other mods that should be used with them, like springs?



I installed roller-tip 1.6 rockers on my Formula. No other valve train components are required to be changed as long as the factory cam has been retained.

However, I would strongly advise the exhaust manifolds at least be ported to get rid of the ridiculous metal restrictions left in place by Pontiac. The exhaust cross-over pipe could be modified and improved as well. It's all about flow.
hercimer01 MAY 27, 11:37 PM
I do plan on porting the manifolds. I was told there is a 30% restriction in them to keep them quiet.
Patrick MAY 28, 12:26 AM

quote
Originally posted by hercimer01:

I was told there is a 30% restriction in them to keep them quiet.



I suspect they were made that way simply to keep production costs down... but yes, it certainly changes the tone of the factory exhaust (for the better) when the manifolds are ported.

If you haven't already seen This thread, you might wish to give it a peek. I describe a few procedures that you might find helpful with the job you're about to do. I also posted a few videos there with good quality audio which demonstrate what the exhaust system sounds like with ported manifolds and 1.6 rockers.
hercimer01 MAY 28, 10:42 PM
1963 VW beetle exhaust manifold gaskets fit like a charm BTW.
cvxjet MAY 29, 01:41 PM
I have the 3.4 F-body long block conversion in my 85.......What is the rocker ratio on that engine?
hercimer01 MAY 29, 04:12 PM
Same heads as the 2.8L ,1.5:1