What cam are you running?

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cjh said:
Your right......on another forum I'm on, you can click on the pic, and it goes bigger.......hhhmmmmmm.

108* LSA
Inlet 35-71
Ex 40-76
Overlap is 75*

0.340" Lobe lift for both.

Duration @ 0.050" is In 242* and Ex 246*

Tappets set @ 0.022" Hot.
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basically the same cam i have but with 4* less intake duration
 
I run a very old (vintage) Racer Brown cam 520 lift with 254 duration. 108 LSA. 904 auto. Putting car back together. Not a street car by any means though. I had a small Isky cam but not sure if they still offer /6 cams...
 
I was really looking at the .440 lift 260 duration 110° separation cam Comp has even if I got those specs ground somewhere else but wasn't sure how street able it would be. I have non power breaks, nothing needing vacuum (The carb is a holley 6299 with mechanical secondaries) so the separation is fine for me. I read that with a slant you can go up to 280° duration but I would imagine that is extreme for a driver. Dusterkrazy is that on a shaved head or stock height?
 
cjh and moparkid you both are running .520 for a valve lift if I got the math right (lobe lift × 1.5 rocker ratio)?
 
I just finished my new 170 engine. Bored and hone .060 with a block plate. TRW forged piston, with valve relieves added. Deck cut .010 to clean up. Head milled to 37 cc chambers. Shim head gasket. Calculated CR is 11.56 to 1. MP valves 1.70 intake, and 1.44 exhaust. MP dual springs with damper, and aluminum retainers. Crane keepers. Crane 3/8 pushrods. NOS rocker arms and shaft. MP cam .528 lift and 284 duration, 76 degrees over lap. Cloyes double roller timing set. Rotating assy is balanced, and full groove mains. MP windage tray and baffled oil pan. Intake will be a Clifford intake with a nitrous fogger (from my other engine). Carb will start with a Holley 465 that I am running now, with plans to go bigger. Not sure what headers, Yet. Might use Clifford shorties, or Aussiespeed long tube, if I can correct some issues. Ign is a fixed advance stock distributor, with a MSD 6a.
 
MoparChic71 said:
I was really looking at the .440 lift 260 duration 110° separation cam Comp has even if I got those specs ground somewhere else but wasn't sure how street able it would be. I have non power breaks, nothing needing vacuum (The carb is a holley 6299 with mechanical secondaries) so the separation is fine for me. I read that with a slant you can go up to 280° duration but I would imagine that is extreme for a driver. Dusterkrazy is that on a shaved head or stock height?
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the biggest comp cam acts like a stocker lol... and have OCG grind it is thats what you want, comp nitrides their cams which dont play well with the oil pump gears

MoparChic71 said:
cjh and moparkid you both are running .520 for a valve lift if I got the math right (lobe lift × 1.5 rocker ratio)?
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slants are a 1.35-1.45 ratio, i got .470 valve lift after .024 lash
 
.470 kid your car is an auto or stick? I did find a .473 valve lift (@ 1.5) 256° duration cam for the slant from Howards Cams but I've never heard of them. If I go custom grind I really have no idea what to aim for. I have a stock 904 and 7.25" rear with 2.76 gears (my whole rear axle is yellow for some reason not the same yellow as my car either and has all sorts of factory marks on it...is there a limited slip 7.25"?) I'm getting confused with all the options and variables.
 
MoparChic71 said:
.470 kid your car is an auto or stick? I did find a .473 valve lift (@ 1.5) 256° duration cam for the slant from Howards Cams but I've never heard of them. If I go custom grind I really have no idea what to aim for. I have a stock 904 and 7.25" rear with 2.76 gears (my whole rear axle is yellow for some reason not the same yellow as my car either and has all sorts of factory marks on it...is there a limited slip 7.25"?) I'm getting confused with all the options and variables.
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i think a gave a cam recomendation earlier, i dont remember the specifics of your build anymore. Howards make a good stick. As far as the 7.25 i would ditch it for a 8.25, you can find them with 3.21's often enough in the 70's a bodies and have LBP.
 
im running a 2001 vintage comp cams 264s. not to impressed by it. at least not until i got some boost to help it along. there was a noticeable difference in power just not what i was looking for.

hyper pac, holley 390, short headers. didnt up the compression because i was going turbo.
 
MoparChic71 said:
Charrlie_s love it! any pics?
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No, I am tech challenged, as far as putting up pics. Actually just looks like a blue slant six engine.
There is a you tube video, that has both my 66 Valiant and my 66 Cuda in it.
[ame="http://www.youtube.com/watch?v=se4n19Frn2A"]Slant Six Mason Dixon Spring 2012 720p - YouTube[/ame]
 
I definitely want an 8.75 rear I just have to find one that hasn't been laying around in new england lol! I went to my machinist today and he suggested that I call up Isky (the guy that started the company over 60 years ago is still there!) He also said all cams are nitride hardened (the black color on the cam) so it's not only a Comp thing and that I should go with a 225° to
230° duration at .50 and the highest lift the duration will allow. I also learned that its the duration (and overlap) that affects idle quality and not the lift. I'm still taking everyone's suggestions and informantion
 
MoparChic71 said:
I definitely want an 8.75 rear I just have to find one that hasn't been laying around in new england lol! I went to my machinist today and he suggested that I call up Isky (the guy that started the company over 60 years ago is still there!) He also said all cams are nitride hardened (the black color on the cam) so it's not only a Comp thing and that I should go with a 225° to
230° duration at .50 and the highest lift the duration will allow. I also learned that its the duration (and overlap) that affects idle quality and not the lift. I'm still taking everyone's suggestions and informantion
Click to expand...

I dont know of anyone who runs an isky but yea they used to get with it back in the day. And i agree with that duration and lift specs for a fun street car, maybe a little high for a daily but im sure it could be tuned easily.

Comp is the only one ive ever heard about eating oil pump gears, but will have to call around on some stuff.
 
MoparChic71 said:
I definitely want an 8.75 rear I just have to find one that hasn't been laying around in new england lol! I went to my machinist today and he suggested that I call up Isky (the guy that started the company over 60 years ago is still there!) He also said all cams are nitride hardened (the black color on the cam) so it's not only a Comp thing and that I should go with a 225° to
230° duration at .50 and the highest lift the duration will allow. I also learned that its the duration (and overlap) that affects idle quality and not the lift. I'm still taking everyone's suggestions and informantion
Click to expand...

Yes, the overlap is what gives that cool "cammy" sound. Kind of a bummer since I am running a blower and need to use a cam with very little overlap. Hence, no "rumpity rump" for me. I will have to be content with that whine.
 
LTOP I would take a blown six over a Lopez cam anyday. Lol! Do you actually drive the car around town (can you?) I can imagine it at a car show and how much attention it gets. :)
 
MoparChic71 said:
LTOP I would take a blown six over a Lopez cam anyday. Lol! Do you actually drive the car around town (can you?) I can imagine it at a car show and how much attention it gets. :)
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Well, Moparchick, at this point the engine is currently being built on the stand while I try to get the car through DEQ ( smog emissions) with the stock engine. Once it passes, I get can get 2 years of smoggy-free use out of the car, or even apply for lifetime plates.
I have not yet settled on a cam, but am leaning toward having OCG grind one for me with around 470 lift, 220 @ .050 duration and 114 valve separation. The car is an orange 77 Volare. I can't wait to see that Hilborn injector scoop sticking through the hood!
 
I have a Delta, they did a cam to my specs.
.236/.230 duration, 106 LSA, installed ICL at 100 degrees (6 deg advanced). .340/.322 lobe lift.

Don't forget the slant has a long stroke and crappy ports so you can get away with a bigger (duration) cam than other motors.

And the rocker ratio does suck - on mine it is 1.436 I played with pushrod length and found that the factory length actually produced the most lift (.488 at 0 lash) even though geometrically they are too short depending on who you believe.

However mine has yet to run (still sitting on the stand with the car in the body shop) so its kind of theoretical...
 
i found a list of factory cam. but only these two for the slant 6.
1, 268 degree .460 lift P4286679
2. 276 degree .490 lift P4286681
they look like a daily driver to me. but i dont know if they are still current.
 
Thanks for helping sry it took so long to post again. I am still trying to decide. I think the 276 .490 cam sounds pretty good but can you run it with a stock automatic without having problems as a dd? I do want it to sound like it has a cam but nothing to crazy. Being a Gemini I can't ever make up my mind. :/
 
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