SBC top end build input???

[patmckinneyracing]

I have nothing but good things to say about summits 1103 camshaft. Problem is people will judge a camshaft they use and then assume all cams from that company are the same when in reality it's the person not matching up their drivetrain components. I have suggested this cam to several members on this board who were very happy with this cam when it was all said and done.

Reason I'm going bigger is cause I've ran this cam for 5 years now and want to get something a little bigger and have a larger stall with an overdrive trans. I ran a 14 flat at the strip with a stock stall th350 and 3.73 rear end with summits cam. Food for thought.

 

[RITTER]

Oh, I wasn't putting the Summit cam down. I was just saying I was talked out of getting one.

 

[patmckinneyracing]

I know you weren't putting them down RITTER. I was just referencing the people who talked you out of it.

 

[MD13ailey]

my guess would be about 350-365hp.

 

[SScamino]

pat, I ran a car with the exact cam the 1103 and stock 882s it was OK. but not 385 horsepower, so you must have a hell of a port man haha what was your trap speed?, anyways.041 are great heads! I never said anything bad about them at all. and saying they make more power than what most people think, its already been proven a million times that newer designs are better, Ive had 416s 882s 993s and currently 062 vortecs that I picked up for 150.00 got the manifold free and reused my carb and wow. 041s with port work are gonna be the same with a voodoo 268! your going to have fun with it. But people also dont realise that its kinda hard to make 400hp with any factory heads that have port work, thats including vortecs.

 

[patmckinneyracing]

No the heads I got off ebay were already ported and had larger valves. I don't remember the trap speed as I raced the thing back in 07 or 08' .

I've had guys sit there and tell me that with flat top pistons and my 882 heads I would have an 8.2 or 8.3 CR. Yeah BS I've spoken with 4 engine builders who input the data into their dyno simulators and came up with 9.4 CR with flat tops and no valve reliefs and 9.1 with 4cc valve reliefs. It wouldn't take a whole lot of port work with the larger valves to make an 882 head flow just as good as other mentioned heads. No they may not be anywhere near the capabilities of aftermarket vortecs, but IMO they are a respectable head when not cheaply built.

 

[SScamino]

Thats dead on, who told you that with flat tops it would be 8.2 lol thats factory!!!!!!

 

[patmckinneyracing]

Had 13 guys tell me that over on teamchevelle.com forum

 

[crash]

LOL yeah, 8.2 is a little on the low side. Just google compression ratio calculator and plug in your numbers, you will end up with right around 9.1:1

Head gaskets will make a difference though as some have smaller or larger bores, and different compressed thickness.

 

[patmckinneyracing]

It should be right around 9.2 just because the heads are probably 74 cc after being cleaned and what not. It's a standard bore 350 and the head gasket I will be using is from a felpro gasket rebuild kit. The engine builders pretty much knew the exact thickness the second I told them that. I figured keeping the compression between 9 to 9.5:1 keeps it streetable so that it can run with the shitty quality gas we have at the pump now.

Sorry RITTER for taking your post in another direction.