My new motor is in my car and i will hopefully get it running running tonight. I just wanted to see what type of numbers you think i will get from this motor. Its in a everyday driver which will be raced on weekends periodically.
350 ci
vortec heads w/ lt1 springs
flattop pistons 10.0-1
tappet cam .453"intake .480exhaust 216int, 228 exh 112 lsa 1.5 rockers
performer rpm intake
600 cfm edelbrock performer
stock hei with taylor wires
1.5" headers into true dual exhaust

im now kicking myself for not going with a beefer cam but i predrilled the heads to accept 1.6 rockers which i will install later on. i also have a selection of carbs to experiment with including a 650 and 750. Im open to hear opinions.
thanks

 

Should give in the mid-high 300s of HP. The headers are going to be the first limit to it output; the carb the second (too small). You'll probably do best with the 650, the 750 would be better if you had a slightly longer duration cam, to optimize the motor for higher RPM operation, to take advantage of the heads' flow.

Otherwise, a good combo.

Watch out for the height of the valve guides. On those heads, the retainer will smack into the top of the guide, at somewhere between .460" and .480" of lift, on stock ones; you're right there, so there's a definite risk. http://www.chevelles.com/cgi-bin/for.../4/22338.html? do a search on the page for the word "measured".

 

Id say your probably putting out about 350hp. All in all it sounds like a good combo as long as you have the gears and trans setup to match it. And as RB said I would worry about the guides unless you have already modified them.

 

thanks guys,
those numbers are exactly what i was aiming for. I got it running staying late at the shop. Just need to readjust the valves and set the timing and should be good to go. im stoked about this motor and i think its going to be almost a perfect combo for power and streetability AND on a college kids budget.
I really shouldn't say anything till the motor is fully broken in, and thanks for the info.

 

I'll add to that. The 600cfm carb, 1 1/2" headers, and the cam will compliment each other nicely, to give you some added bottom end, at the expense of some top end HP.
Especially if your gearing is a bit on the tall side and if you have a stock converter. If the carb is jetted correctly, and you spend some time with getting the right power valve in there, and the timing is right, your fuel consumption should be very easy to live with.

 

There is no power valve in an edelbrock/

 

LOL duh LOL

 

'Scuse me... power piston.