jspurl3
Full Member
Awesome!
Yeehawbouree!
That IS a roller-cam motor though, correct?
Guess I should go back through to make sure, bit wanted to throw that in real quick into the discussion.
Congrats on the instantaneous fireup!
Are those heat-wrapped shorty headers? Wasn't really sure, but that's what it looked like.
Paul
It is not a roller cam...
That's why I brought it up. It was mentioned in your other thread, first by Broncobowhser in post #7 and then in more detail by Tirewater in the last post which did not get a response, about properly breaking in a camshaft. Not the engine over an extended period, but the cam only in it's first half hour of life.
Maybe you know this already and we just didn't see it in the vid, but you NEVER, NEVER just fire up a new flat-tappet cam and let it idle even for a minute. You don't let it crank for an extended period while you figure out why it's not starting (in your case it fired right up obviously), or let it idle while you dial in timing or mixture screws or anything like that for the first (at least) 20 minutes.
You need to fire it up, immediately rev it to at least 2500 rpm and leave it there for at least 20 minutes. This is always done with a non-roller type camshaft to let the oil splash and drip on the lobes. They're not lubricated by the normal pressurized oil, but gather their oil from the surrounding meelee inside a running engine. Once the mating surfaces between the lobes and lifter bases have worn in together, then you can idle all you want.
I generally use 30 minutes, in three 10 minute intervals, to let the engine heat up and cool down. Some say 20 minutes, some say 30. Some say 2000 rpm, some say 3000. But those details are up to the individual as long as it never idles during that time.
During this process, if you need to check something or fix a leak or let off the throttle for whatever reason, you need to shut it down and not fire it up again until you can raise the rpm to that same 2500-3000 for the duration of the 20-30 total minutes.
Not doing this will more often than not end up with a camshaft that won't last 10,000 miles. In some cases, it won't last the first 1000 miles before one or more of the lobes go flat.
Setting static timing is pretty important to getting it started, but one little balancing "dance" to perform is checking, and if necessary re-adjusting the timing either while the engine is running at those elevated rpm levels (it's easier with more than one person), or with the engine shut down completely.
And advancing the timing sometimes even more than you would normally helps to keep the exhaust temperatures down. This is especially helpful with nice expensive ceramic, chrome or other painted header or manifold finishes.
Good luck. Sorry if you knew all that already, but I didn't see where you said anything about it and wanted to make sure your cam had as much of a head start as it could get.
Paul
With the right motor then, that could be an excellent performance combination. Even with the overdrive.
My vote is to the wait-and-see category.
Paul
Here you go Crush...
https://www.youtube.com/watch?v=wEE-sZDZ0WE
Paul, I have 32" tires with 4:11 rear end.
The TKO 600 also comes with different options for the overdrive. I chose the higher of the two options. The lower 5th option was 0.64:1
1st - 2.87:1
2nd - 1.89:1
3rd - 1.28:1
4th -1.00:1
5th - 0.82:1