just curious. Whats SJ at IS opinion running Q16
when on the hose. Rest of the ring lands?


C23 comes to mind.

quote:

Originally posted by TD3550:
just curious. Whats SJ at IS opinion running Q16
when on the hose. Rest of the ring lands?


C23 comes to mind.

Q 16 is alright up to around 350 - 375hp. A lot of people using it for more power supposedly.

We won't too finicky. Sooty.

This lost ring seal, oil burns faster than fuel.

Nitrous grim reaper.

Just needs a piston though, no biggy.

First off sorry to hear you hurt your good bullet, 36* is a lot of timing. On my alcohol 23* head SBC N/A I only run 28*. I have spent a lot of time on the dyno and track and think most people are running more timing than needed.
If I remember right the HP difference between 28* and 38* was not much but it made more power at 28* and it is a safer tune up. One other little thing when you are running too much timing you can get away with it being a little fat on the tune up. But it is not optimum.
What can cause it? Too much timing, Too lean, Detonation. If in fact it was safe tune up before I would look for clogged fuel to that cylinder.

My 421 abc has max hp at 31 degrees.

The OP's base timing was 36 minus 11.

Our base timing is 28-30 degrees 23 427. 350 hp nitrous.

quote:

Originally posted by TD3550:
just curious. Whats SJ at IS opinion running Q16
when on the hose. Rest of the ring lands?


C23 comes to mind.

Yea...Q16 was ok for finish line spray usage! Once we went to spray 32 jets and bigger...should have went back to C16 or 23. Motor cane to me with a C16 Carb...I bolted on my known good Q carb...should have phoned a friend (Steve Johnson).

quote:

Originally posted by OhiomafiaWireGuy:

quote:

Originally posted by TD3550:
just curious. Whats SJ at IS opinion running Q16
when on the hose. Rest of the ring lands?


C23 comes to mind.

Yea...Q16 was ok for finish line spray usage! Once we went to spray 32 jets and bigger...should have went back to C16 or 23. Motor cane to me with a C16 Carb...I bolted on my known good Q carb...should have phoned a friend (Steve Johnson).

Do you monitor pan vac? If you don't talk with Steve about the idea.

You can see the detonation in the ring seal, it'll chatter the rings.

quote:

Originally posted by Curly1:
First off sorry to hear you hurt your good bullet, 36* is a lot of timing. On my alcohol 23* head SBC N/A I only run 28*. I have spent a lot of time on the dyno and track and think most people are running more timing than needed.
If I remember right the HP difference between 28* and 38* was not much but it made more power at 28* and it is a safer tune up. One other little thing when you are running too much timing you can get away with it being a little fat on the tune up. But it is not optimum.
What can cause it? Too much timing, Too lean, Detonation. If in fact it was safe tune up before I would look for clogged fuel to that cylinder.

Yea, I pulled the NOS system apart and found no dirt...

Motor came with a dyno sheet that said it was ran on C-16 and 36* timing. Shame on us, but never played with timing. I have never owned a small block that wanted any less than 35*..alky, gas, 23* or 15*. However, why I’m finding is that a 37 nitrous jet changes everything. Should have pulled base timing and went from there. Confusing thing is my AFR was 12.8:1 the pass before and that pass. Only thing that was abnormal this run was vacuum was down 3” when it was staged..dropped to another 2” at the 330 and then went positive when I clicked it off. Looking at the plugs...timing wasn’t too far off...no signs of detonation on any other cylinder.

My 23 degree combo likes 36 base. And due to a fuel issue I have two pistons on the shelf that look worse. The cylinders were not damaged. I dissolved the aluminum with acid, threw a hone on it and replaced the pistons in frame.

quote:

Originally posted by Mike Rietow:

quote:

Originally posted by OhiomafiaWireGuy:

quote:

Originally posted by TD3550:
just curious. Whats SJ at IS opinion running Q16
when on the hose. Rest of the ring lands?


C23 comes to mind.

Yea...Q16 was ok for finish line spray usage! Once we went to spray 32 jets and bigger...should have went back to C16 or 23. Motor cane to me with a C16 Carb...I bolted on my known good Q carb...should have phoned a friend (Steve Johnson).

Do you monitor pan vac? If you don't talk with Steve about the idea.

You can see the detonation in the ring seal, it'll chatter the rings.

I do...and that’s the first thing I look at after a run. This pass...the vacuum was down before the spray came on. The pass before this, vacuum was normal the entire run.