Thanks Jim, yes I'll bet it is snappy with the 12 to 1 compression. Unfortunately its a whole 'nother animal with 2 1/2 points less and iron heads and pump gas with those lobe profiles. What octane fuel do you need to run the compression you have? I'm running 11.7 to 1 in another engine with alum. heads and it'll run fine on the street with 92 octane but have been made aware it needs more with high rpm at the track. And the DCR in that engine is 8.55.
Dave for the most part I've been running 50/50 mix of C-12 and pump gas. I did run it with mostly pump gas at one point in the season, and was getting a little pinging. Didn't like that so I've kept it at least 50/50 ever since. I don't drive the car all that much, so it's not that big of an issue for me. Jim
Speaking of iron heads and compression, Street Rep is running 11:1 with irons and a custom cam to help bleed off a little of the cylinder pressure. He hasn't run anything but pump gas. Ran a 10.98 at Cecil. In video of Gessler goes 10.98, Steet Rep was in the other lane Steve
290-08hl 112 LCA I swapped this cam in place of the Hemi Killer cam I had, along with some stage 2 heads and Wildcat intake for the SP-1. I can't believe how much smoother this thing idles than with the Hemi-Killer. It will actually idle at 675 RPM in gear. Crisper throttle response and more low-end torque are what I notice so far. Supposedly from only 3* less duration at .050. I haven't done any tuning yet, and have only driven to the muffler shop and back to get the exhaust refit for the new headers. So, I can't say how the performance has changed, and won't know what change is from the heads or the cam anyway. I think it will work well when I get the port fuel injection along with A/C working. It doesn't sound as "mean" either. I didn't expect that much difference in drivability.
I forgot, My cam was actually a custom grind using the standard intake lobe parameters for the exhaust too. Being I have Stage 2 heads, we figured it didn't need all the extra duration on the exhaust. I s'pose that helped the idle a little bit. 10.25:1 compression.
Seems to be a very popular cam.... Iron heads SP1 10.39 to 1 950 cfm carb made 547hp on the dyno and ran 11.57@116 on the track....in a good light GS that is set up for the track low 11's should'nt be a problem.
ARGG. lost cam card for the 290-08h cam. Just had it last month. Anyone have the criticals for degreeing this cam? I'd really appricate it I have the degreeing tools all set up but no cam card. sigh. thanks Nate
Jim and George, I owe you both a 6er of beer. You both I assume will be at BPG in aug? -nate now to figure out why 4 degrees advanced (with coyles timing chain set) give me a center at 96 degrees. yes i did it twice. ou: I can see why this can take all day!
I changed the break-in oil this morning and did a quick video from my digital camera (located on the ground in what appears to be a lot of dying moss) after I got mine warmed up: http://youtube.com/watch?v=z8mty8suFsI
Jim, I'm finally getting this thing running. I'm working on getting a tune, I have an ignition table set up with it all in 31* at 3100 rpm at WOT and it starts and idles at about 15* timing. What would I have to gain getting the ignition timing at 25* initial? Thanks, nate
My brakes have been fine, sometimes I can have a little problem before it gets completely warmed up, during rough idle, but I don't have a choke. I do agree, this is probably as big as you can go and maintain enough vacuum for power brakes. It is right on the edge. I do love the cam though. Great lope at idle, good power throughout, and at WOT it kicks ass. On the street, I run a puny 750 QJ and the torque and snappiness is superb. If I put on a larger carb, I do get more top end, but I lose the nice idle and tend to have a little more problem around town with response (seat of pants does not seem to have as much snap or kick). Of course that could just be my inability to get it set right. I am no skilled mechanic.
I just got my second put in (lost the intake lobe/lifter on #6 :ball: anyways..) and running two days ago. I'm going on a 500 mile road trip to Vegas in the car after work today, going to check the mpgs vs. the C118 cam I had before. The laptop will be out and making the ignition and fuel adjustments on the fly as needed :TU: Hopefully this cam does better, I greased it up I think better, greased the bottom of the lifters before installation, and followed it up by pouring a bottle of 20w-50 Valvoline VR1 oil over the whole cam before installing the intake. And of course the standard cam break in procedures when the engine went back into the car.
