I got them, just checked what length pushrod I will need, looks like a stock 7.5" will give me about ~ .35 preload
72 360 Cam Install - Mopar Engine Beating Me
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I got them, just checked what length pushrod I will need, looks like a stock 7.5" will give me about ~ .35 preload
Good, I was tryin to light a fire under your butt. lol
he had the money as soon as he gave me the price, LOL I'm ready to get this thing on the road
returned from Hot August Nights and a trip to the Summit store for the right length pushrods, installed and fired the motor today, have a list of issues to deal with then will get it tuned out best I can to see what it will do. I have a few questions that I can't seem to find a clear answer to, hopefully someone here knows.
I pulled number 1 plug again to double check TDC, all good, while I had the plug out I stuck my scope down the hole, read part# 4007042 on the piston, didn't find any clear info on what that piston may be, does anybody have any info for what it might be, top of piston has two dish/reliefs.
I read numerous posts on static/idle timing with people using as much as 20 degrees, I plan on setting my all in at 34 degrees around 2600 - 2800 and see where that leaves my static, is there something else to look at. distributer is stock electronic style.
I pulled number 1 plug again to double check TDC, all good, while I had the plug out I stuck my scope down the hole, read part# 4007042 on the piston, didn't find any clear info on what that piston may be, does anybody have any info for what it might be, top of piston has two dish/reliefs.
I read numerous posts on static/idle timing with people using as much as 20 degrees, I plan on setting my all in at 34 degrees around 2600 - 2800 and see where that leaves my static, is there something else to look at. distributer is stock electronic style.
That's a factory Chrysler part number for a stock piston.
I found one place that showed it was a discontinued Mopar piston, another that showed it was a 30K oversized forged 11.5, internet sucks sometimes
How to Hot Rod Small-block Mopar Engines
that's what I found in the link above, but what RRR indicated in the link below, guess I won't ever know for sure, not tearing the motor apart unless I have to.
P4007042 - Genuine Mopar PISTON PK-PISTON PKG .030
I mainly went by your description and the fact that I know a Chrysler part number when I see one. You identified it as a dished piston. Maybe the dome is on the other side?
maybe my description is incorrect, in the link below on page 33 is what the top of the piston looks like as far as I can tell, the article states "domed high compression piston", it also appeared to have the noted plug relief. Now Im even more curious, gonna have to put the scope in again and take a photo. LOL
How to Hot Rod Small-block Mopar Engines
Ok, so the picture I see on page 33 has three different pistons. By the part number's description the piston you have should look like the one on the far left. Is that correct? If it is, that's the high compression domed pistons.
What you should have should look close to this.
ICON Premium Forged Pistons IC743-040
The "dish" you describe might be where the dome transitions into the valve reliefs. Does the piston above resemble what you have?
ICON Premium Forged Pistons IC743-040
The "dish" you describe might be where the dome transitions into the valve reliefs. Does the piston above resemble what you have?
in the picture on page 33 with the 3 pistons the top of my piston looks like the top left, this also makes me more curious about the motor overall, got to deal with a couple of leaking steel freeze plugs before I can get on the road, headers gotta come off to get to them. uggg
Thanks for the info guys, my quest continues.
Ive just used the term "dished" to describe a cut or something for the valve reliefs, the piston does somewhat resemble the on in the link you included, but more closely in the link I shared as shown on page 33, when I saw the small round plug spot I just thought it was an anomaly, as stated, curiosity has the better of me, I'm gonna drop the scope down inside again.
Yeah, those are the old TRW pistons they made for MP years ago. Good pistons. Some say too heavy, but I ran a lot of them and never had trouble. They're hard to tear up.
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took it off the jackstands today and backed it out of the garage, gotta find the brake fluid leak (should be easy but it hasn't been yet) and a few more minor nuisance issues then back on the road.
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