Hey Guys,
Quick question... my Coan converter should be here in the morning so I'll have all my stuff to do my cam/converter/oilpan swaperoo... my buddy whose shop we're going to do it at(cam break in+horses+neighborhood association=no good) Anyway, buddy is going to help me and he told me to pass it by you guys how the Ultradyne's were built. Its a SBC276/286H12 from Spring of 2003 before Harold went to Lunati. It says to be installed on a 106 ICL, which would be 6 degrees advanced. Does this cam have 4* built into it therefore only needing to be advanced 2*, or is it ground straight up and needing 6* advanced because the initial 4 degrees aren't built into the grind??
Thank you in Advance!

Steve, my UD 288/296F7 from the same time period had 1 1/2 built in. Degreed @ 105 1/2 when installed at first.

Useing Pat DCR program (Thanks Pat graemlins/waving.gif ) I went with 103+- 1/2, insteed of the 101 which it called for.

Forget about what is built into the cam, measure the closing event, or use the quick and dirty method. DO NOT ASSUME - Measure. MOST cams have 2 ground in them and the pins are +2. MEASURE!

My first ud cam was 110 lsa and 104 icl. Installed it at +4 degree keyway when degreeing. My cam now a lunati 276/284, 110 lsa, 104icl is installed using 2 degree retarded position to get it degreed to specs

The UD cams had 2º built into them. At least that's what Harold said. That way you could use the +4 timing set marks to get 6º advance. The best bet, though is to degree the cam and make sure it is where is should be.

Now Im starting to get a little worried. I have the same cam as Blumont. I was confused so I installed it dot to dot. Did I make a mistake?

MaTt

MaTt,

If the cam is already in and you want to check, use my 'Quick-n-Dirty' method......
Take off the driver's side valve cover, turn the engine to TDC. If Nr 1 cylinder has both valves on the seat, turn the engine over again.
Both valves should be OFF the seat at TDC, and Nr 6's valves should both be ON the seat.
Using something like a Machinist's 6" Steel Rule, measure from the spring seat to the top of the retainer, 1st on intake, then on exhaust.
The intake retainer should be .030" to .060" CLOSER to the head than the exhaust retainer. If it measures anywhere in that range, it is in the engine just fine, and will run good.
If the exhaust retainer is closer to the head, the cam is retarded, and you need to advance it.
Always recheck after moving the cam.....
This system has worked for over 20 years.

UDHarold