ok i am lost Help on compression ratio goal PLEASE

[jayb]

Fabulous customer service, Barry, which of course you are known for.   

[ScotiaFE]

Fabulous customer service, Barry, which of course you are known for.   

X2 Barry. Bravo Zulu!

Question though. If he already has the SRP's .005" above the deck and he changes to another off the shelf piston which I was looking around
and most are showing a 1.330" comp height. Will this not put him .010" above the deck and thus causing even more grief. just thinking out loud.

[My427stang]

Or he can just send the (carefully packaged!) pistons and rods here and let me remove them.
He's gonna pay for some shipping either way - an extra few pounds won't matter much.

There you go!  Best for all involved IMHO

[fe66comet]

I do not blame anyone, it is what it is. I appreciate  Barry helping me out, most people it is 30 days and that is it, it has been nearly three years. Now I am into finishing the engine up and when I took a look at the piston specifications they did not add up. I thought I was missing something so that is why I asked. My memory is so bad I forgot what rings and rods I used, the rods are full floaters and rings are standard gapped. I have done some other engines since starting on my FE and they kind of melt together. The rods are a plus I forgot about but I will upgrade the rings while I have it apart. Some Zero Gap street rings come to mind as a possibility. Eventually I am going to send my heads to Barry for the chamber and port work but for now I would like to just get the thing together. Barry has always been good to me so I would send others to him, I have already and would continue to do so regardless. I am certainly not done with building FE engines and actually am looking at getting the N-600 truck I discussed earlier, I will continue to deal with all the folks on the forum. If they can deal with my cranky butt LOL.

[My427stang]

Fabulous customer service, Barry, which of course you are known for.   

X2 Barry. Bravo Zulu!

Question though. If he already has the SRP's .005" above the deck and he changes to another off the shelf piston which I was looking around
and most are showing a 1.330" comp height. Will this not put him .010" above the deck and thus causing even more grief. just thinking out loud.

I thought he was .020 deep...

[bn69stang]

WOW ...  Awesome  Barry , that is above and beyond on customer service .. Bud

[ScotiaFE]

Fabulous customer service, Barry, which of course you are known for.   

X2 Barry. Bravo Zulu!

Question though. If he already has the SRP's .005" above the deck and he changes to another off the shelf piston which I was looking around
and most are showing a 1.330" comp height. Will this not put him .010" above the deck and thus causing even more grief. just thinking out loud.

I thought he was .020 deep...

I used a feeler gauge and a stainless strait edge, it has a .005 pop up on one side, the other is slightly lower on the smaller area by the reliefs total volume when I filled the entire piston was 28 cc with a 17 cc dish. I measured the piston with a syringe, slow but extremely accurate. So I am guessing it is made up like a Probe as I thought. So where does that put me now?

I may be thinking old school pop up. Above the deck.
I'm not sure where the .005 pop up is, but if it is above the deck a 1.330 comp distance won't help.
Like I said a pic would help a lot.

[My427stang]

I agree and see why you thought that, I am just as confused LOL

but to be .005 above he'd have to have a 10.145 deck height, that is pretty short...I think we are losing something in translation and/or measurement

In addition, I think he is claiming its a 17cc dish but he also measured the volume of the ring land above the piston, the calculators account for that, so my hunch is really he is just under 10:1. 

On top of that he said he thinks maybe it was originally spec'd for 10:1, all that makes sense with Probe dimensions, not sure where the SRP part number came in though.  Too confusing      time to get some real measurements

[fe66comet]

At the top it was a tiny over if not level at the top, at the bottom it was far below. Total volume to the top of the first ring measured -28. The small area that was up was about 1/4 or less of the total piston top just above the reliefs. I suspect that the pistons are for supercharged applications? The pins and walls are definitely thick with double locks and such. When Barry get's. Them I am sure he knows what the intended application is? The .02 1 calculated by subtracting the block deck height from the crank, rod and piston specifications. That is when my brain had a miss fire and I could not figure out why nothing added up. I thought it was just me being goofy.

[fe66comet]

Spiro locks are not a big deal, I get em with a sharp pen knife, it gets right behind them and walks them right out. Kenny Santfort taught me that trick when I worked for him. I have been around the block a few times, even had to push my ride home LOL.