DRC With 408, please help me figure this out!
04-19-2006, 12:21 PM
#21
Interesting, I just got off the phone with Brian @ TSP and he said they would not run anything over 11.5:1 with that cam in our heat.
With a .051 cosmetic head gasket (when torqued 0.045), 64cc heads, -8 diamond pistons I should be right at 11.25:1. He said I should be fine and with the 90/90 should put down around 530-550 with full timing on an N/a tune. That makes me feel a bit better.
When ordering, I tried to make sure I don't lose the drivability of the car and want to retain the "fun" in it. If I want to get nuts with it, I can just drop the timing, throw some race gas in it and throw the happy gas on it.
Thanks for the help guys.
With a .051 cosmetic head gasket (when torqued 0.045), 64cc heads, -8 diamond pistons I should be right at 11.25:1. He said I should be fine and with the 90/90 should put down around 530-550 with full timing on an N/a tune. That makes me feel a bit better.
When ordering, I tried to make sure I don't lose the drivability of the car and want to retain the "fun" in it. If I want to get nuts with it, I can just drop the timing, throw some race gas in it and throw the happy gas on it.
Thanks for the help guys.
04-19-2006, 08:58 PM
#22
Originally Posted by JakeFusion
Actually, I'll just assume it's 297 at .006" intake and is on a 112 ICL. The ABDC is 80.5 degrees in such a scenario.
As for as 11.1:1, -8cc pistons with 64cc heads on a 408 is more like 11.4-11.5:1 with a .040" Cometic.
The DCR is barely 8.0:1 with such a low SCR and would result in less than stellar power. Mill the heads .030" down to 59cc to get over 12.0:1 SCR and the DCR up around 8.4:1. That's a big cam and can take a lot of compression easily. It'd still be pump gas friendly and would make a lot more power everywhere.
Also, look here for a description for choosing the optimal cam I wrote a little while ago: https://ls1tech.com/forums/showpost....61&postcount=3
As for as 11.1:1, -8cc pistons with 64cc heads on a 408 is more like 11.4-11.5:1 with a .040" Cometic.
The DCR is barely 8.0:1 with such a low SCR and would result in less than stellar power. Mill the heads .030" down to 59cc to get over 12.0:1 SCR and the DCR up around 8.4:1. That's a big cam and can take a lot of compression easily. It'd still be pump gas friendly and would make a lot more power everywhere.
Also, look here for a description for choosing the optimal cam I wrote a little while ago: https://ls1tech.com/forums/showpost....61&postcount=3
That cannot be correct. I have no idea what I'm doin wrong 
