Still there, my MK-1 eyeball says .150.
My home inspection of Speedmaster heads
- Thread starter 318willrun
- Start date
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Still there, my MK-1 eyeball says .150.
Got to have a boss for the bolts. LOL the original heads were designed for production and not for performance. Kind of like the exhaust bolts threaded into water jackets. What were they thinking? You can cast a boss in there but at a cost and complexity.
Was just wondering how much it was reduced. Making it straight would likely require breaking through, epoxy and tubing the holes.
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It takes about 20 minutes max to tube all 4 head bolt holes. I’ll post up the needed tubing sizes when I get mine. [ATTACH
yellow rose
Overnight Sensation
IIRC (I may be thinking about BBM heads I did back in 2013) there is a bolt boss that hangs down into the port. I ground it out of there, but there was a bulge in the port where the oil feed gallery comes between the ports and I didn't screw with it much. My butt puckered with thoughts of a small fracture developing after 50 runs or something and filling the cylinder full of oil.
I know God hates a coward but that made me a bit queasy so I let it be!
PBR,
I'm really considering doing an all out porting job on these myself, safe to say I'm not using all this stuff on a 4x4 318 beater........um, I do have another vehicle though!
I'd definately be sticking to sound theories and what works on the SB head layout, tubing is something I am a little apprehensive about but am reading up on, watching some videos. I'm game! Thanks!
I'm really considering doing an all out porting job on these myself, safe to say I'm not using all this stuff on a 4x4 318 beater........um, I do have another vehicle though!
I'd definately be sticking to sound theories and what works on the SB head layout, tubing is something I am a little apprehensive about but am reading up on, watching some videos. I'm game! Thanks!
What kind of compression numbers do you think we will get? My 70 318 is supposed to have around 9:1 although that's just a number Ma Mopar came up with. I ran some numbers on the Desktop Dyno which can be a bit skewed, but with 340 manifolds and a Hughes Rattler cam I traded for, I came up with 380 horse and 460 lb/ft of torque. I used the head flow numbers found in another thread. (somewhere) I hope I bookmarked them.
j par
Well-hung Member
When I check clearance for my 273 rockers I used a piece of .030 welding wire to slip between there.. once I could get that to clear I felt comfortable..
j par
Well-hung Member
Wouldn't it be funny if all this time YR was actually Jpar's wife posting things from magazines, internet & such. No wonder YR gets the best of Jpar and lives in his headHe'll get his cheesebooger when she gets good and ready to cook him one!
Well you certainly weren't saving the show with that first comment that I quoted...Great stuff being posted....Thanks All !!!
..
j par
Well-hung Member
I noticed a lot of the chips that people are finding are "mostly" on the CNC'ed heads... Which to me makes sense as they were regular heads and sent to a machine shop probably by the pallet load...
You two! I would like to meet up for a beer sometime. I have some good homebrew. LOLWell you certainly weren't saving the show with that first comment that I quoted...
Just sayin' Sorry to get off kilter here. Note the cooler in the trunk of my Swinger.
j par
Well-hung Member
The federal government revoked my drinking license! They said the world Supply was getting low and I had to stop years ago LOL.. if I was going to fall off the wagon I'd burn me a doober first..
Keep Oregon green!!..
j par
Well-hung Member
We have an a body group here in town that meets once a month at the local pizza shop and we had a picture like that with probably a couple dozen of us. Lol it was in my opinion the Federation of white people LOL.. there was such a lack of diversity it made me almost uncomfortable...
Been known to do that too. Been decades though!The federal government revoked my drinking license! They said the world Supply was getting low and I had to stop years ago LOL.. if I was going to fall off the wagon I'd burn me a doober first..
Keep Oregon green!!..
Bring a lot of A&W !!! I don't drink a drop of alcohol... LOLThe federal government revoked my drinking license! They said the world Supply was getting low and I had to stop years ago LOL.. if I was going to fall off the wagon I'd burn me a doober first..
Keep Oregon green!!..
Prejudice? IF you want to count colors, get a pencil and tablet and walk around your car
You guys need a cheeseburger? 
j par
Well-hung Member
You can't swing a cat without hitting a weed shop around here... What a era in time to quit...
...Electric lettuce! LOL I had to take a picture of their spinning sign it was the most blunt I've ever seen so far... (Excuse the pun..)..
j par
Well-hung Member
Another you're officially back comment..Prejudice? IF you want to count colors, get a pencil and tablet and walk around your car
Looks like you're out to start the Facebook drama that you accuse me of..
I guess as long as I put a
that's different...
2/3 back. Keep the record straight.Another you're officially back comment..
Looks like you're out to start the Facebook drama that you accuse me of..
I guess as long as I put a
j par
Well-hung Member
@fishmens67 not the Red X!...
Oh man my feelers oh man I think I'm going to get all upset and jump up and down! A direct hit to my feelers...
Oh man my feelers oh man I think I'm going to get all upset and jump up and down! A direct hit to my feelers...
Just to say, we all want to be liked and accepted here. The red X is kind of a slap in the face. We can all disagree but the dreaded red X is too much "in your face". It's all a matter of respect for your fellow Mopar friends. You can disagree but you don't need to be all over them about it. Just my take. Just sayin'
j par
Well-hung Member
Oh man I wanted to hit the disagree button so bad I can taste it...lol...
the only way it gets me a little is when someone just out of the blue has a red X on an old thread and don't even explain themselves it's like what????..
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