Miss above 4000 rpm

[CowtownCobra]

Originally Posted by Dirty Harry

I had a miss that was driving me nuts, trying to find. I, too, had the long oval air cleaner.

I had a problem with one of those oval Cobra air cleaners years ago. Caused a higher RPM miss because it didn't breath worth a darn. Replaced it with a K&N and never looked back.

[Texasdoc]

I just bought a K&N. It has been sitting in a box on my floor for a week...

[jhv48]

I agree to check the rev limiter chip in the msd box before you mess with anything else.
Too big of a coincidence that the motor cuts out right at 4000 rpm.

[Texasdoc]

Yep. That's first on my list. Only I mounted the box so I can't get to the limiter easily. Gotta find a tiny screwdriver and a small mirror. Only need to stop working long enough to check it. Flu season ROCKS!

[Texasdoc]

Originally Posted by STEVE-O

Whats your rev limiter set for in the 6AL? I would hope it would be higher that 4K but worth checking if you havent already.

Ding, ding, ding, we have a winner! - Hopefully.

The rev limiter was set at 4500. I remember (now..) that I had set it low so I wouldn't over-rev it during the first few hundred miles. I haven't gotten to test it yet since I didn't get home from work until after 10pm. I set it for 6k. Since this is my first ever engine build, I'm not sure what my redline should be.

I did check the dizzy center post and installed the K&N air cleaner. No burn marks on the underside of the air cleaner. Now to set the timing back like it was and hopefully get a drive in tomorrow to test it.

Thanks to all!

[kinsey]

6 grand is probably about right for rpm for amildly built motor. you can go higher if you have the right parts-ask your engine builder. how tal is you filter element you should check and see how close your filter lid is to the carb.

[Texasdoc]

Originally Posted by kinsey

you can go higher if you have the right parts-ask your engine builder.

Unfortunately, that's me. This is my first engine build. I will try 6k and see how it does. I'm going to the dyno in two weeks.

[Dwight]

drive it without the air cleaner.
We had a friend with a 351W with a 8" S&H air cleaner with a paper filter and mess wire support. Motor would not rev pass 4300 till we removed the cleaner. Then it would go to 6000.

[Texasdoc]

SOLVED! It was the rev limiter. Runs smoothly and pulls up to the 6k mark. Scheduled for a carb tune next.

THANKS for all the support!