the bible says to respect our elders...doesn't say anything about having to like them

 

Interference engines with rubber bands has to be one of the most stupid automotive ideas ever foisted on the public.

Many manufacturers now have gone away from rubber band drive interference engines. Either more a more reliable drive or stick to non-interference for the cheaper cars.

 

sorry. *goes back to cage*

 

LMAO just kidding...for the record

 

i'm just kidding too...i'm still on the prowl.

but in all seriousness i only know the 444 gas/diesel thing to be rumor. probably just people who didnt know what they were talking about going off of the same cid.

 

the head design on our trucks make the piston/valve clearances soo close that the valves can hit the piston rather easily. being as these things dont have compression chambers on the heads the valves are super close. this is why there is only one aftermarket cam i have found for these that wont have the valves contacting the pistons, but it does come very very close. this cam is a half stage cam. if you look at the outlaw stage 1 cam you have to have the pistons cut for valve reliefs with just that small cam. so you can imagine sticking the stage 3 cam in you would have to have some major valve reliefs machined into the pistons!!! so i would say yes the valves WILL hit the piston if something goes a little bit wrong.

Also the intake valves/valve seats on our heads arent great either. any of us could probably pull our intake and exhaust valves and see a HUGE difference in wear between the 2 since the exhaust valves are made of different metal they hardly show any wear over time, but the intakes will get very very thin before we get to the 300,000-400,000 miles that we plan to drive our trucks. this is why when i pull my heads i will be getting 32 hardened exhaust valve seats and putting all exhaust valves in my heads. the valves are all the same size @ i wanna say something like 1.56", but have different valve angles which is the reason for getting all the exhaust valve seats.

 

if your building and engine that requires a HUGE cam odds are you are going to put lower compression pistons in it, making the piston farther from the head. can someone explaine to me why you need massive lift in a forced induction motor anyway?

I have heard alot of Cat guys just chuck em in a lathe and take material off the face of the piston and leave the bowl area alone. but they keep the stock cam so its irrelevant.

Diesel Rod

 

the reason for more lift is the same reason 12v cummins guys put a 24v cummins head on their trucks. also why the 6.0 was built with dual intake/exhaust valves. the heads can only flow so much air in stock form. yes you can cram air in with a big charger, but simple things such as porting the heads or larger cams help out quite a bit. i'm not talking like its going to make the same effect as a larger turbo, but it will help larger turbos give you more power b/c you arent trying to cram all that air into a smaller area and the valves stay open longer to let more air in/out. i haven't done anything with heads/cams in these trucks, but i would bet they would help us out