Recent content by DARTH V8R

Full competition VJ's with angles and seat widths chosen to maximize high-lift flow on a race car reduce low- and midrange performance in realistic street-cam lift ranges. Also you want a fairly thick margin on a STREET engine. 30°/45°/60°. As per the OP's original post.

So have you used the 50° seat on a LA p-car head? Or just what you read in the LS forums? Local machine shop here wanted a grand to go external to internal balance. Don't see how 30° are for tractors. ASK the pure stock drag guys about it.

convo started

Seems like you want the easy way out. Break it off, you risk it cracking more, or the metal there might be porous and you break off a bigger chunk. Anyways, your engine, your money. Do what you want.

Reread post #3

Well I guess your right if your talking aftermarket heads. The OP is using stock P-car heads. Just a 30* cut with no porting will yield significant gains in the below .400" area.

Drill a 1/8"th hole where the crack ends, and call it a day.

50*? Yikes.. you running .700" lift solid rollers? I'm taking up to .500"ish lift. 30* seems to outflow big time any other angle up to .350", where the majority of cylinder filling takes place. 70 throat and your set IMO.

^^ To internally balance a 360, won't that cost a ton of $$$.. mallory metal etc. I heard 30* seats are the hot seat up on the intakes.

Well now. I also cc'd some 3671587 smog heads, they were around 71.5cc on average. Interesting that the 80's heads (well at least in your case) chambers are larger.

Can't tell from the pic, but you have a spark plug screwed in and seated?

78cc? That's a lot lol. My 915 'J' heads spec'ed at 70cc. Those heads off an 80's 360?

Yeah .011 is the deck clearance. 383/440 cam will be a huge problem lol. Sorry I shoulda posted a link with it. 340 cam: http://www.compperformancegroupstores.com/store/merchant.mvc?Screen=PROD&Store_Code=CC&Product_Code=20-309-4&Category_Code=LACAMHFMM

Looks like the Falaise gap of WWII fame. You can march 30000 men between it. For the love of God set the gap to .017". Yah think?

4.30's and a TH200R. Now ur talking..