BBR's 83GT - 552 BBF version 3.0 (at least)

[BBR]

sounds good! someone needs to get their cameraman a zoom lens

I also forgot to take my son's GoPro with me!

[JWS4621]

I actually was lucky to remember to record this time. Figured he would be more worried about the launch not that I did a great job with that either. Very amateur video guy, using my cell phone.

[DanStokes]

You might get some tips from Russell. He's a real pro at using his cell phone cam!

Dan

[hauen]

If you hadn't mentioned there was a problem I'd have never guessed. Sounds pretty damned good from here.

[BBR]

Thanks!

Here's what I am learning after consulting with some super smart dudes. My carb has the old style bar boosters:

The Holley book by Mike Urich & Bill Fisher published by HP Books (© 1994, 1987) says the annular booster uses a jet 4 or 5 sizes smaller than the bar booster. That is consistent with what I have noticed but compounding that is that fact that no two engines want the same jet size and the difference from one engine to another can be that much or more. Give it whatever jet it wants and expect its appetite to change if you change anything in the intake or exhaust or cam or ….

So I need to forget about numbers and just jet it where it runs right.

[BBR]

It warmed up enough this afternoon that I was able to pull the carb off and have a look. Pulled the carb apart and did see some sizable aluminum bits stuck in the gasket material that were not there before. I guess I did not get some of the passages I tapped either in the main body or in the metering block as clean as I should have. I'm betting that when the air filter sucked down it may have cleaned out the offending passage much like the trick DF did on the Roadkill episode with the Bronco and Suburban. I am also going to switch to press on jet extensions as the carb guys say the screw in ones have an adverse effect on flow.

I might see if I can borrow JWS4621's bore camera and take a look down the intake runners to see if I can see any gasket material out of place or obvious signs of oil suckage. Got to love technology!

[milner351]

"borescope" worth it's weight in gold! Hope you can get that and see if / where those gaskets moved.

Are your block or heads milled? I wonder if there's a geometry problem with the intake and head no longer being parallel?

[BBR]

I doubt there is a problem with them, because I figure there would be more evidence of them leaking. It's definitely worth a looky while the carb is off though.

Carb is definitely 100% clean inside and out now.

[milner351]

Very well - you did a lot of surgery on that big fuel mixer - it's no wonder a few chips got through...

[BBR]

Yeah and it would not take much cloggage in an air bleed to really jack up the afr.

[milner351]

very very true, fly shit or pepper would do it!

[BBR]

Scoped it at lunch. No visible signs of gasket horkage. Whoo hoo.

I also picked up some 11/32 brass tubing to make push-on jet extensions. $2.79 at the local hobby shop.

[DanStokes]

Costco has a flexible borescope for $149+/-. Worth doing? I've been - um - scoping it out but was trying to resist as I have a reputation for buying tools I really don't need.

Dan

[Bob Holmes]

Dan, the problem with a bore scope...is that you don't need it until you really need it.

[BBR]

I wish I had one, but I just borrow Jonathan's (JWS4621) whenever I need one. They are super handy for car stuff as well as home improvements. Mush easier to use than a flashlight and mirrors!

This one is really called an "inspection camera". Color lcd screen, etc. Very handy.