Thumper - I didn't take it that way at all man! I've picked up a good deal of info and knowledge from your carb threads! You should be happy tho - this thing had a 650dp on it early in its life LOL (gotta use what ya got!)...and now I'm looking to convert the 850 over to screw in bleeds...

B5 Bee - That's exactly how I look at it. I'm green at this I admit but I've learned way more from my failures than I have reading to the n'th degree about a subject.

Cab - Oh I love learning from others. I pick something up everyday from members here. I appreciate those that do offer genuine knowledge without being snarky. Didn't really intend for this to blow up into a cam degreeing thread but I definitely opened the door up to it.

Who hasn't been where you are unless they never took an engine apart and re assembled it.........I've done some stupid stuff that makes me laugh today. Keep at it cos I may be asking you for advice down the road............

Thumper - Haha I don't know about that man you are a pretty sharp cat!

Dewayne - the kid was asleep so I couldn't warm the engine up for the compression test tonight. I went ahead and did a cold test however. Came up with 155 psi cranking pressure.

155......okay, not too bad.

I'd say knowing that.......the cam isn't "way too big", and since the speed picked up, and the fact you already have a 9.5" converter......go ahead and get it loosened up.

The cam you're running is designed so you can really play with the lash.......from .015-.030.

If you go to the track again before you get the converter done, try loosening the last to around .030(if you're not close to that already) and see if it picks up in the 60'.

KDY - you said you want to learn. Why don't you take the advice of several people and check the centerline. If it's dead nuts move to the converter. If not, put it where it belongs or advance it 2 degrees from recommended. THEN check your cranking compression. Then take it down the track.

Then you'll have learned something.

I assume you checked TDC of your damper against the piston true TDC location? How much spark are you running?

Thank you sir.

The lash is at .022 right now - think that's the suggested lash on the cam card. I hadn't really thought about playing with the lash so that's a great suggestion for me to try out. Cheap one to!

As far as loosening it up do you think 4800 is about right? I feel confident that PTC can get me something that will flash that high and still have some street manners

If the converter is loosened too much it will lose efficiency.

With the amount of torque your motor would be making, if they loosen up that 9.5" converter so it flashes more than about 43-4500...... I think it'll just slip all the way down the track.

You should discuss it with them, but I think they'll tell you the same thing.

you did not post the centerline of the old and new camshafts. But with just 9.5 static compression, the increased duration killed a lot of dynamic compression. You most likely lost a lot of torque on the low end and that is why the converter is not stalling at the same level. Run a compression check with the throttle blades open and see what the static compression is, if its under 140psi, you might try advancing the new cam to get some of the dynamic compression back.

Thanks Fast! I will talk with PTC soon. I appreciate your help with this.

I don't think your TC tightened, I think you lost a bunch of mid-range torque. You might want to add more rear gear to get it back. This assumes that your cam swap netted you more power up high. Sometimes a bigger cam is worse for performance than a smaller cam. I've made that mistake a few times. If the cam is too large then you lose bottom end torque but you don't pick up any top end power. Then you go slower.

Andy - I briefly thought about going to a 4.56 but honestly I like the streetablitily the 4.10s afford me.

With zero tuning the new cam ran within 0.16 mph of the old cams best and that's at a difference of 2200 DA. I think it's making 20-25 more horses based on online calculators. I know these aren't exactly the gospel but it gives some direction at least.

The new cam is better, you just need to play with it more then one night to find what it's going to like. 1st is making sure it don't spin and is on a track equal to the track you ran you old best with. Then you need to dial in the carb for the new cam. Squrters, jets pump cams ect. Make sure the timing is happy and then if it's still soft down low add a little stall.

I run 4.10's and love em even w/the baby 28's on the car now w/enuff tq to shred em at will in all gears. 56's would not help hookin issues if you have em either..........just my opinion...........1.33 60 last time out foot brakin at 2500 and never went higher because I got the boot.........