Recent content by Matt DeCicco

I just installed my 383/496 last year with a brand new power master that was sitting on the shelf for 10 years. It worked good for a few months and then started doing what yours is doing. One day it just gave out. I'll list the following steps to fix the problem. Step 1. Throw out power...

I should mention that it didn't do it out of the box, and the valve cover bolt was too long.. it must have taken 6 or so times before it finally broke through. Other than that the heads have been great, they even installed 10° locks and retainers for me.

Promax confirmed it is a bolt hole that is just a little too far. I have installed studs and sealed the one that was in water jacket, problem solved.

Initially I thought that was due to a bad alternator. The voltage was spiking up randomly, I changed it along with the voltage regulator That's what I wasn't sure of.. I'm not too familiar with how the water passages layout. I'm sending in a picture to promax so they can come up with what they...

They are promax heads. I'm going to call in the morning to see if they can give me any insight. I stuck a piece of wire in the hole, and it seems like it does not bottom out like the other holes. It's strange that it didn't do it before, I'm hoping the hole just got drilled and tapped a little...

I have a 383 with aluminium heads. The motor was recently done and running good. I was on the highway and the car started to smoke and burn oil so I pulled off and noticed the pcv hose fell off. I re attached the hose but the car was still running funny.. I just loosened a valve cover bolt and...

Tank is vented with a couple of lines bent like a candy cane, I have a holley black pump, but not the larger regulator they recommend with it. I do have the regulator but have not plumbed it in. I know my pressure is good at wot but the volume may not be there

This is great info, I appreciate the help! I agree with the accelerator pump duration.. I have 31 squirters and I went up a size to see if it would help, but didn't do much. It leans out when I hit the throttle for a second. The cams are whatever came on the carb, maybe I'll pick up a set to...

A/f is wideband. Cruising at 3k it's around 13. When I get on it, it leans out for a sec but stays steady around 14.5-15. if I'm in a high gear around 2,500-3k, say 3rd, and get on it without downshifting, it leans out and will backfire through carb. I think maybe going up a jet on the...

I have a newly built 496 stroker, when I get on it hard, the rear main leaks near passenger side. My vac is around 6-7hg (the needle flutters) do you think this pcv would work? I think maybe I have to much pressure with the low vacuum and it's getting past the rear main.

I just did a 383/496. I got Pro max heads, if you call them direct they will set it up for roller and 10° lock and retainer. These heads flow 295cfm and for a few hundred more they'll CNC them to get even more!

The only vacuum lines are vac advance and pcv, I sprayed around intake to check and all was good. I did a compression test today 190 on every cylinder, initial timing 17° and about 40 all in by 3,000. Plugs look good and air fuel ratio is good. The car runs good, I'm just thrown off by the...

Ok, so I replaced one spring in the distributor to a stiffer one and this seems to have eliminated my problem on the highway. I also have an air fuel guage connected. My vacuum is low and the needle fluctuates at idle between 6-7 HG, also when I increase rpm the vacuum increases as well...

Ok here is my update. I put in a holley black pump, fuel pressure is good while driving, 950 proform carb, nothing helped. I set initial timing to 13° with vac advance and put one stiffer spring in the distributor and it is much better. I can now go on the highway ok, but it feels a little...