Being that the Camper Special kit was a gift, that cam is what I got. I do appreciate the numbers. The word back from the type 4 folks was 7.5 to 8.0 for the CR and our new friend at Reynolds machine said 8.0 was what he thought for the numbers on that cam. So it is reassuring that everyone is on the same page. Incidentally, we are only in Jackson in the Summers and that may change in the next few years. Is there any reason to go lower than 8.0:1? Like if we moved to Arizona or something? Not saying that we would choose AZ or TX or anything, but that's pretty much the opposite of Jackson WY...and I'm curious if different ambient conditions would play a roll in choosing a combustion ratio? Do you have a write up on that already here somewhere? I know you drive all over in all conditions so would I also be able to do the same? I know everything is a compromise... but what are the vagabonds to do about CR?Amskeptic wrote: ↑Sat Dec 08, 2018 11:25 am
You camshaft will diminish vacuum at low speeds/idle.
Fuel injection does not like that. Cold idle does not like that. Take off from stop lights does not like that. Emissions tests do not like that. High elevation engines do not like that.
A loaded Vanagon at high elevation NEEDS TORQUE low down so you can launch from a stop light or start on a hill at 7,700 feet.
If that is your chosen camshaft, you will need a little more compression than stock, like 8.0:1.
You will need higher idle timing, but you cannot have more upper end advance, so you need a distributor that can hit you with 12-14* centrifugal at IDLE but not exceed 28*-32* centrifugal at 3,400 rpm (the 28* is the limit at sea level, 32* the limit at 7,000 ft)
Am I done?
Yes.
Colin
The project is having a little winter nap right now as we busted out a 24 hour drive in our Subaru to Illinois. Molly's Mom is having some health issues and could use the help around the house so we figured we would extend the time on both sides of our holiday visit to help out as much as possible. I thought I would make the time to start a post for the van build when we were in San Luis Obispo but got caught up in Thanksgiving Family stuff and going to the climbing gym as much as possible. I'm also probably a little embarrassed that the build isn't stock.
Thanks again Colin,
Cheers,
Tim