Rise of the Phoenix

iTrader: (27)

Thanks Martin. Phil had originally stated that I could go the 59cc route and by doing that, I'd have .050 intake clearance. I decided I'd like a little bit more room and told him I want no less than .060 clearance, so that's when he suggested I go with 60cc or 60.5cc.

I may end up e-mailing him back and seeing if I can change it to 63cc and run the .040 gaskets.

JakeFusion

iTrader: (7)

Martin, one question. When the person ended up running less compression and tighter quench, what was their DCR? Before and after.

Rise of the Phoenix

iTrader: (27)

Good question. I assume my DCR would be difference depending on which way I go???

Martin, I remember you posting up somewhere what DCR this cam likes, could you post that up. Jake Fusion had figured out what my DCR would be going the 60.55cc and OE gasket route. I'd like to see where that stands with what you recommend.

Sales@Tick

iTrader: (3)

I would have to ask him. He had a motor that was built by TSP with PRC 247cc heads on it with one of their custom cams. We were discussing compression of his new build and head gaskets came up. I told him my thoughts on the .040" Cometics for a build like his and he agreed with me along with mentioning what he found losing compression and gaining quench. Raising or lowering quench adds or lowers static compression along with dynamic compression. Only cam timing affects dynamic compression and not static compression. He was using the same camshaft in both set-ups as well. I believe he had a .060" gasket on one motor with 3.2cc flat tops and then went to a .040" gasket and 8.0cc dished pistons on the next. Lost a tenth of compression, but gained .020" quench area and picked up power.
The LS1 Stage 2 Torquemax cam and just about every other build I spec out utilize 8.8-9.0 DCR. It will generate 8.2:1 DCR with a stock compression LS1 motor@67.7cc roughly. With a stock 243 head@64.7cc on a LS1 it can generate roughly 8.5:1 and with a .040" gasket you get nearly 11:1 static compression and 8.64:1 dynamic. Most cams with similar duration figures as the SNS Stage 2 can't generate this much dynamic. This is another reason IMO it makes as much torque as it does down low and across the power curve. With a 62-63cc head you have a DCR that would take other cams 11.25-11.5:1 static to generate.

Rise of the Phoenix

iTrader: (27)

Based on Jake Fusion's numbers, with the 60.5cc heads and OE gaskets, I'll be at 11.25:1 SCR and 8:9:1 DCR. Does that look ok to you?

Sales@Tick

iTrader: (3)

That is perfect. I always like to see 8.8-9.0:1 for 93 pump gas.

Rise of the Phoenix

iTrader: (27)

Awesome. Can't wait to get these bad boys. I'll create a new thread with TONS of pics once I get them. Phil said I should have them in 2 to 3 weeks.

maxpower_454

iTrader: (7)

For some reason Phil likes the OEM gaskets and I'm not sure why. I went against his recommendation on stock gasket and 60cc chambers and went with 62cc and .040" gasket which would be basically the same clearance and CR but increased quench for the exact reasons Martin mentioned.

Sales@Tick

iTrader: (3)

I like your style!

maxpower_454

iTrader: (7)

Thanks! if I had to do it over again I would have got my parts from you guys. AI's email only policy is driving me nuts!!! Their heads make great power from what I've seen but their response time is terrible for customer service.

I can't do anything about the past but you've definitely earned my future business!

Sales@Tick

iTrader: (3)

Wow! Thanks for the kind words!