The Cal-look Lounge

Hello
I'm changing the heads on the 2332, that's going to my fiat. I have some new comp eliminator heads with 48x40 valves that are equipped with double springs that I know nothing about - they came with those heads. I wonder if my pushrods - manton 3/8 x 0.035'' - will be strong enough or should I buy the 0.058'' ones? The cam is SCAT c65 and  lets say that I'm planning to use a 1.5 pauter rockers.

The other question is what rockers should I use? I have 2 sets at my disposal - 1.4 scats and 1.5 pauters?
Engine spec is: 94x84 with a lightened flywheel, balanced etc, scat c65 cam, comp eliminators 48x40, 48 IDAs with short manifolds. I'll think about the exhaust when I will be sure about final engine spec

You can see those springs here:
(http://img40.imageshack.us/img40/3219/20110417857small.jpg)
(http://img535.imageshack.us/img535/8986/20110417855small.jpg)

The C65 is for a stock ratio rocker arm.

Hmm quoting the scat's page "GRINDS FOR 1.25:1 & 1.40:1 ROCKERS"
So I'm confused now. Not sure if I want to open this engine but maybe... what cam would work good there?

That's interesting, when I ran a C 65 years ago, Scat stated it was for stock ratios only. Unless they changed it, it was very close to an Engle 140. I hope they did change it, I hated that cam.

Ok but what about the pushrods?

Hi, by the looks of it your heads have the K800 springs ( the stripe ) you will Pretzel the thin wall pushrods instantly with those springs. I would at the minimum use the thick wall cro-moly or better yet go for the dual taper ones (even less flex )
I agree with John, ditch that cam and go with a proper ratio rocker cam, 86C, FK87, or FK89 perhaps.
For the rockers I would choose the ones that give you the final lift you want and best geometry, the only way to know that is to trial assemble the top end with the 2 rocker assemblys and see which one will work the best.
Remember that the older Scat rockers listed as 1.4 ratio actually lift to 1.5 or better.

Cheers, K-Roc,

I ran the 0.035" Manton's for a couple years and then started to notice some slight bending on a couple pushrods, as I increased HP from 131 to 169 to 180.  Switched to 0.058"-wall and no more problems.

Then I had to swap to different valve adjusters temporarily, which required using the old 0.035's again (it's all that I had availalble at the time) and sure enough a couple more pushrods bent!!  I've stayed with 0.058" Manton's since then with no problems...

thanks!
I have one fk89 on the shelf so maybe I should use it? Taking the engine apart is not a problem now.

Ok so I followed your advice and changed the cam for fk89. At the same time we swapped the crank for a scat pro-comp and put some longer rods in. We'll see what will come out of it. Fiat weights ~600kg so it should be fast.
Trial assembly for deck height measurements:
(http://img38.imageshack.us/img38/5489/20110423867small.jpg)

That cam will work very well with those heads. However, do yourself a favor and make sure you don't run into coil bind. I have the same combo and the Pauter rockers lift closer to a 1.6 ratio which is good because it really wakes the heads up. This will put your lift in the .640-.670" range. You will need 1.800" installed height. You'll also need piston notches around .200" deep

Thanks, I'll check it out. What is your engine spec and how much power does it produce?
[EDIT] ok I saw your page.

Checked the cam timing etc. and the specs came out like this.
Cam lift 0.395
Lift at valve .595 with Pauter 1.5 and 0.555 with Scat 1.4s so I will go with the Pauter ones.
With the gear on the cam at 0 got the intake to spec with the cam card but the exhaust was 2 degrees off- can't remember which way though.

Wished for a bit more lift, but at least no coil bind issues :)