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Old 04-14-2013, 04:31 PM
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Should I still lock out the Distributor

I am in the process of replacing a comp thumpr cam with "2" different cams. I bought the Isky 270H on a recommendation of a board member. But i found a crane cam p/n 10017 that looked like it would be a good choice also. I know its childish, but i really like the lope at idle. So I was looking for a cam that would better suit my compression ratio and have that lope we all like. The Crane cam is 218/218 106 LSA. I noticed summit made the same cam for half the price. At 75 bucks i didn't feel like i was loosing much if it wasn't the one for me.

Now on to my question. Right now with the Comp Mutha thumpr, 235/249 @ 50, 107 LSA cam i have now, i have the dizzy locked out 36* total timing. With this smaller cam, Should i keep it locked out?

Edit: here is the Cam in question.
http://www.summitracing.com/parts/sum-1785/overview/

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Last edited by Slammedsi; 04-14-2013 at 04:32 PM. Reason: added info.
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Old 04-14-2013, 05:08 PM
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Everybody likes the lope at idle.
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Old 04-14-2013, 06:05 PM
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The smaller cams will probabily not need full locked out timing.

More like 22-26deg at idle and 36deg at max advance. ( a 10-12deg advance curve)

Just stick the Isky cam in it. Degree it in on a 104 in C/L.
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Old 04-14-2013, 06:22 PM
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Quote:
Originally Posted by spinn View Post
Everybody likes the lope at idle.
I know a lot of different people catch flack for stating they want a cam that lopes. I.E. Not looking for the performance aspect of it.
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Old 04-14-2013, 06:54 PM
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If you want the cam to lope,then build the rest of the engine to match a decent cam?
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Old 04-14-2013, 07:20 PM
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Originally Posted by vinniekq2 View Post
If you want the cam to lope,then build the rest of the engine to match a decent cam?
that's the plan with a short block i have set aside. Progress wont start till later on that motor. Thanks for the advice Fbird. Most likely will.
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Old 04-14-2013, 07:57 PM
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Quote:
Originally Posted by F-BIRD'88 View Post
The smaller cams will probabily not need full locked out timing.

More like 22-26deg at idle and 36deg at max advance. ( a 10-12deg advance curve)

Just stick the Isky cam in it. Degree it in on a 104 in C/L.
Fbird, What would happen if i try keeping it locked out at 36* on the smaller cam?
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Old 04-14-2013, 08:13 PM
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Quote:
Originally Posted by Slammedsi View Post
Fbird, What would happen if i try keeping it locked out at 36* on the smaller cam?
You will upset the Space-time continuum
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Old 04-14-2013, 08:35 PM
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You will upset the Space-time continuum
I just spit beer all over my computer.. Thanks haha
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Old 04-15-2013, 05:35 AM
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Quote:
Originally Posted by spinn View Post
Everybody likes the lope at idle.
Nope. I like a smooth idle. That means the tune is correct.
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Old 04-15-2013, 09:36 AM
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Even though you chose a cam with more overlap, you can still tune it.

Not sure, what this guy is communicating.
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Old 04-15-2013, 09:51 AM
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Originally Posted by F-BIRD'88 View Post
You will upset the Space-time continuum
and destroy your engine...
If that matters at all.
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Old 04-15-2013, 09:57 AM
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This cam , 218/218 106 LSA , locked out with 36 degrees timing will destroy itself?

AP, Tell me more.

The original post , had a big cam. Decided he liked the idle sound, but wanted something more reasonable. I respect that.

I don't understand why not just retime it. I took this as a what if question.

Last edited by spinn; 04-15-2013 at 10:02 AM.
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Old 04-15-2013, 10:16 AM
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Quote:
Originally Posted by spinn View Post
This cam , 218/218 106 LSA , locked out with 36 degrees timing will destroy itself?

AP, Tell me more.

The original post , had a big cam. Decided he liked the idle sound, but wanted something more reasonable. I respect that.

I don't understand why not just retime it. I took this as a what if question.
too much advance will cause detonation, and will cause the weakest link to fail- could be a head gasket, piston ring, piston, bearing, rod, a multitude of things.

Lets try it and find out- its not my engine.
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Old 04-15-2013, 10:22 AM
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Too much load at too much advance causes detonation.

The advance alone is not going to do it.

Im at a disadvantage, I don't know what this is do you?

I believe the best timing advice was given in post 3. On what will happen if he left it 36. the hypothetical question. I don't see destruction.

Last edited by spinn; 04-15-2013 at 10:29 AM.
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