If you put a certain amount of lift in an engine with a big valve, it's going to hit the piston. I'm sticking to my guns on this one.
Kurt
I invite you to explain your logic.
If you put a certain amount of lift in an engine with a big valve, it's going to hit the piston. I'm sticking to my guns on this one.
Kurt
I agree total lift is not the determining factor. Ridiculously high lift might require a more aggressive ramp rate to keep it off of the piston, but the major point here is that more important than lift specs are duration and then LSA/LCA. You're right about the non-stock heads and cam Nik, but I was actually just bringing to light that at some amount of lift, the lift figure does matter. The motor is non-interference, from everything I've been told. That being the case, there is a given lift below which there will never be PTV contact and above which it becomes a possibility.
Cool, but wouldn't it be kinda nice to know a peak lift number below which you can say with certainty that someone will never have a problem? I mean, if it takes .540" that's a pretty big deal, because there are lots of 302 cams that do not go that high. I guess it would still be complicated by other things like head milling, gasket thickness, flat top vs. factory notched pistons, etc... Ok maybe it's not such a great idea... I'd still kinda like to know, though.
So the shop may have a barely used set of 185cc or something. They're suppossed to be bigger than the 165cc but I'm either gonna buy those and slap them on my 302 or use the funds for a 331-ish size DD motor.
Two thoughts:
Get the Big Heads milled like mofo to help my 302ci??
If I get the 331-ish bottom end, my fully ported/milled Gt40p's will have to be used regarding low funds.
Sorry, no Dyno sheet's as of yet. Just finished putting it together a couple of months back. Going by my "Seat-o-the-pants" meter right now. It's definitely a strong runner though. Really rev happy and pulls like gangbusters above 3,000RPM.My Gt40p are already .030 so I'm kinda use to it and the throttle response is Amazing
Gearbanger is your dyno sheet posted, like to see your powerband??!!!
I'd build the 331 and keep the gt40s for a fun potent dd.
It'll be more powerful than a 302 of course, but not nearly as powerful as it could be with better heads and intake.I know I've really thought about that. They're heavily ported along with the ported Cobra intake as well. Main reason my Ecam is thriving now. What about this,
331+my Gt40p+ Cobra