I have my fresh 440 on the road, it runs good in town but at higher rpms it gets hesitant, but if i take it on the free way and the rpms go up around 65 MPH i get a repeating back fire in the passenger side does it every second or so I even got the Flap in the manifold that opens and closes Tack welded open position thinking it was opening and closing causing back fire cause my driver side doesn't have that flap but the side that has the back fire did but didn't fix the problem.( i run true duel exhaust) and if i go WOT the car sputters acts like its missing or something and makes all kinds of noise it starts doing it soon as i hit 60, gets worse at 65 and does it even at 75 MPH not been higher than that, I think the mechanical part of the timing is off I done research on bending them tabs in the dizzy, But i was wondering what do they set the PRO BILLET Distributor from 440 source mechanical timing at from factory? I dont have a RPM gauge so i cant really take it to 4000 RPM to see what the total timing is, I am running a 440 whiplash cam with 14 degrees BTDC, my car has the push button A727 trans and 4.29 gears
I been messing with air idle screws and the secondary air flap on the carb, and none of that's fixed it.
Any thoughts Or did i give enough information?
I just found this he talked to Pro Comp i guess the 440 source dizzy is Pro Comp PC8007 8000 series dizzy. Does the 29-30 degree mechanical advanced out of the box sound right? if that's right, lets say its 30 + my 14 degree BTDC = 44 degrees total? can that cause my cars symptoms? I am suppsed to be around 35 or 36 total right?
PS: I looked everywhere cant find contact info for pro billet on a site that has the distributor, every site is all off-road suspension parts maybe that's the same phone number?
"OK, here is a follow up. The procomp distrib from 440source is the procomp pc 8007. I finally got a hold of someone at procomp. There is a spring kit you can buy for $6 plus shipping that will have heavier springs to reduce the advance. the thing comes out of the box with 29-30 degree of advance!, I guess for race set ups. The "bending of the tab" thing is not recommended. I have the springs ordered and when I get the kit installed I will report back on how it goes but the whole idea is to help get a smother idle after warmed up with a pretty stout cam which is hard enough to do but with tweaking I hope can be close. It's all part of the "dialing in" process right? lol Wish I had some racers next door lol. Anyway their distribs are not made in china! lmao at least not on the 3rd shift, 1st maybe!"
I been messing with air idle screws and the secondary air flap on the carb, and none of that's fixed it.
Any thoughts Or did i give enough information?
I just found this he talked to Pro Comp i guess the 440 source dizzy is Pro Comp PC8007 8000 series dizzy. Does the 29-30 degree mechanical advanced out of the box sound right? if that's right, lets say its 30 + my 14 degree BTDC = 44 degrees total? can that cause my cars symptoms? I am suppsed to be around 35 or 36 total right?
PS: I looked everywhere cant find contact info for pro billet on a site that has the distributor, every site is all off-road suspension parts maybe that's the same phone number?
"OK, here is a follow up. The procomp distrib from 440source is the procomp pc 8007. I finally got a hold of someone at procomp. There is a spring kit you can buy for $6 plus shipping that will have heavier springs to reduce the advance. the thing comes out of the box with 29-30 degree of advance!, I guess for race set ups. The "bending of the tab" thing is not recommended. I have the springs ordered and when I get the kit installed I will report back on how it goes but the whole idea is to help get a smother idle after warmed up with a pretty stout cam which is hard enough to do but with tweaking I hope can be close. It's all part of the "dialing in" process right? lol Wish I had some racers next door lol. Anyway their distribs are not made in china! lmao at least not on the 3rd shift, 1st maybe!"
