Is it wrong to have to grind the piston for valve clearance?

-
At a glance, it looks good. As long as the valves have adequate clearance you should be golden. The head mismatch thing is a bit troubling, but I'm clueless as to how the port flow characteristics compare between the two.
 
looks fine. We used to cut, mill, grind new pistons all the time at a shop I worked at. We did big buck engines too. I was sanding away on some Boss 429 pistons to get them right. Milled the domes on some sbc also to decrease compression for pump gas. The real way check is to have the head on, cam in, rockers on, and crank the engine with a soft spring on the valves to check for clearance. He seems to know what he's doing.
 
I'd say short block is good to go,assuming he'll check valve clearance on assemble.As said before your heads are what make the power,if they aren't right everything else is wasted.My opinion is sell the one's you have and find a good matched set in your price range.Good luck
 
myasylum said:
And thats suppose to mean what? I'm looking for an honest opinion here.
Click to expand...

If you read my 1st longwinded post you see my 'honest opinion'.

Basically if he did all of the things I mentioned it's fine and he clearanced what he thought was necessary and all should be well.


Next time pick a shop you have real faith in and a machinist you can trust cause after you asked him 101 questions on how may have screwed up, he's probably thinking you're a pain in the ... and might send you somewhere else next time not wanting to deal with someone who questions his work basing it upon lil to no idea of how things work/go together.

Not bashing you, it's just that I work at a machine shop part time and deal with customers like this and they always end up embarrassed and red in the face after I remind them why they brought to me in the first place.

I'm about helping people 100%, know that.

My comment was referring to how much clearance he gave the intake valve which I hope in the best interest of flow, knowing how quench domes can have the air crashing into it, prohibiting a lil. fwiw

Don't be paranoid, it's all good.

good luck
Justin
 

also, the 71 head is 66cc's the 79 head is 61cc's! we did some machining and got them up to 64cc's. he thinks that the 2cc difference on the 2 sides should be o.k.
"should be"?
 
You must log in or register to reply here.
-
Back
Top Bottom