Thread: roller rocker help

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ok, thanks tech. When I get the reading I'll repost.

Ok, so here it is: as explained by "tech", I did the measurements with the feeler guage and came up with a strange reading-60 mm from piston tdc to deck height. Now I've been told 350s usually have between 10 and 15. My question: what did I do wrong or what is going on? HELP!!

Originally Posted by CJ 613

Ok, so here it is: as explained by "tech", I did the measurements with the feeler guage and came up with a strange reading-60 mm from piston tdc to deck height. Now I've been told 350s usually have between 10 and 15. My question: what did I do wrong or what is going on? HELP!!

You didn't have the piston at top dead center. The measurement should be somewhere between zero and 0.045". What's with the mm? Get a set of feeler gauges that reads in thousandths of an inch. Wadda you, a foreigner?

I brought each piston on each 4 corners of the block to TDC. I was "told" that they were in MM (the feelers) and that was the reading. As I said-, Ize jes nawt too dang edjamacayted on this heer fast motr billdin stuuufff. TRial and error right?

With your intake combo, single plane intake and 750 Holley on a 350, you should be trying to make power in the 2000 plus RPM range, 2.02 heads will complement this combo, 1.94s are not RPM heads. Also, you need at least 3.73 gears and a 2000 stall for this combo to run good. As is, stock converter and small heads, this intake and carb is going to kill all bottom end torque, sure, it looks cool, but an edelbrock performer intake and smaller carb will give more low end power.

tranny is a rebuilt 3speed manual with a lot of low end torque and 3:73 rears.

also did away with the 1.94 s for a set of 2.02 aluminum heads with 64cc runners... and as always...thanks for the input...its always greatly appreciated

64 CC and flat tops should give you at least 10:1 compression, nice, aluminum heads, manual trans and 3.73, nice combo. With a good cam, you should have 400 HP no problem. I think Comp cams advertised 400 HP with their 292 cam with your combo.

thats what I was looking for-thanks! Now lets hope I don't screw it up putting it all together.

ok lets try this again-the reading (AMERICAN) is .023 below deck height. Tech, is there anyway to run all these specs on your dyno?

.023 is normal for a stock block. To get the proper quench (distance between the top of the piston and the surface of the head you want to use a head gasket that is no more than .022 inch thick and no less than .012. That will give you a quench of between .035-.045 which is ideal for controlling detonation. You can push it to .048 if you have to, but it would be better to stay with the .035-.045 parameter which is ideal. Quench is very important thing to consider when building a performance engine. I'm sure techinspector1 will confirm this.

Thanks a lot Rum. The info everyone is so willing to share makes this build much easier and enjoyable. BTW, love the coupe!!!