Cascade Crew

blue89 · Posted: Sun Apr 17, 2011 8:49 pm Post subject: BBC cam boogie

Alrighty, so my swap meet dial indicator turned out pretty handy and explained the weak power at the dyno. I need some help interpreting the data. The angles were measured at the crank, hope that is okay.

exhaust
0.000 215 btdc
0.010 204 btdc
0.010 0 tdc
0.000 7 atdc

intake
0.000 17 btdc
0.010 7 atdc
0.010 213 atdc
0.000 219 atdc
and .208" lift at pushrod at int and exh.

What I figured was at .010:
exh duration, 204*
int duration 208*
no overlap

at .000
exh duration 222*
int duration 236*
24* overlap
with a heathly .332" lift at valve with stock 1.6:1 rockers.

Please comment. I've never dialed a cam before so I hope this all makes sense.

chevymad · Posted: Sun Apr 17, 2011 9:28 pm Post subject:

Umm.. tiny? Laughing

blue89 · Posted: Mon Apr 18, 2011 6:28 am Post subject:

Oh ya, tiny... so I just might get a lot more power at the next dyno. Just might.

IROCDave · Posted: Mon Apr 18, 2011 5:55 pm Post subject:

What you need is a set of 3.5 - 1 ratio rockers Very Happy

chevymad · Posted: Mon Apr 18, 2011 6:46 pm Post subject:

Are you sure stock rockers are 1.6? I thought they were 1.7.. but may just be confused with the 396 I had. Someone had tried to copy a 375hp (same as 425hp except no holley) on it.

blue89 · Posted: Mon Apr 18, 2011 8:35 pm Post subject:

Rockers are 1.64 by my measurements.

And my cam is tiny. 204/206 exh/int duration? 155 lobe separation? Muahaha, next dyno adventure will result in much more power. According to Wallace racing and my 0.000 measurements:

iansane · Posted: Mon Apr 18, 2011 8:37 pm Post subject:

I like where this is going. Twisted Evil

91RSVert · Posted: Tue Apr 19, 2011 4:04 am Post subject:

blue89 · Posted: Tue Apr 19, 2011 10:29 am Post subject:

I may not wait till next year to dyno... we will see when I get the cam. With a baby coming and the wife income gone for a bit I may need to hold off. But at least I can get a cam. Any opinions on solid versus hydraulic?

Research research research. I'm trolling though the chevelle stuff trying to find a setup similar.

*damn auto spell phones...

blue89 · Posted: Sat Apr 30, 2011 1:39 pm Post subject:

Me being my regular friendly self landed me a free torker cam and lifter set from a guy at work. Anyone have an opinion of it? It's huge compared to my stock one. I think I'll try it just to see what happens. I need to put on my new timing chain cover anyway. They recommended the torker 2 intake but my rectangle port performer rpm air gap should be very comparable.

83Z28BlackBetty · Posted: Sat Apr 30, 2011 2:48 pm Post subject:

I say run it dude! It can't be any worse than what you have now and it was FREE!

~JAKE

rjmcgee · The Hammer Joined: 08 Jan 2004 Posts: 2328

I thought Edelcrock was still making 40 year old grinds. Cam tech has come a long way, might be leaving quite a bit of power on the table to save a couple hundred bucks.

aaron_sK · Posted: Sat Apr 30, 2011 3:28 pm Post subject:

chevymad · Posted: Sat Apr 30, 2011 3:54 pm Post subject:

Quasi-Traction · Posted: Wed May 04, 2011 9:11 pm Post subject:

Twilightoptics · Posted: Wed May 04, 2011 11:16 pm Post subject:

Yeah no.

Get something modern.

Solid if you want a little more and don't mind setting lash on a semi regular basis.

Damnit, spend the extra money and get offset EDM lifters.

chevymad · Posted: Thu May 05, 2011 6:26 am Post subject:

Crower makes something similar for hydraulics now too. They have a lifter with a small machined flat on the side that oils the lobe as it spins. But I think solid's are in my future as well.

Twilightoptics · Posted: Thu May 05, 2011 9:38 am Post subject:

On the side?

That seems dumb.

EDM lifters have the hole on the bottom where it contacts the lobe itself. There is a center hole and an offset hole option. Harold said DO NOT get the center hole. Get the offset hole.

chevymad · Posted: Thu May 05, 2011 5:10 pm Post subject:

Can't put a hole in the bottom of a hydraulic for obvious reasons. Cam lobes run within about 0.030 of the lifter side, so squirting oil directly on the lobe that way will help alot. As you say though.. not like putting it right between the parts. My boss ordered a 454 for his boat from S&J .. it actually came with the crower type lifter. I'd say it looked like a quality piece.. but we actually had to replace one because it stuck down! LOL

Twilightoptics · Posted: Thu May 05, 2011 7:14 pm Post subject:

I don't see why they couldn't put a port on the bottom. It's still a controlled oil leak either way. Just put it on the other side of the valve on the lifter.