Cool beans thanks for the info, now to the real interesting part. This will be a DD type with lite duty as a work and tow. I wanna run it on "CHEAP" gas in Cali 87 is the lowest octane and 89 med, and 91 the highest at 99% of the local gas stations. I dont want a pinger and aint trying to set a land speed record so. I looked at Summit and the 395 P is in stock and the price is great. Oddly the STL-H304P30 Speed Pro ZH304P30 - Speed-Pro Hypereutectic Pistons - summitracing.com
is 21.39 a psiton where the STL-H395P30 Speed Pro ZH304P40 - Speed-Pro Hypereutectic Pistons - summitracing.com
is only 11.39 and I cannot see a bit of difference in the two by looking at the info they list. Am I missing something.

Also I'm wondering what the basis Comp ratio is on the 1.75 pin height pistons. I'm using C4AE 6090G ported/polished at home but the look pretty darn good.

I had/have much mo better plans for the 1UB than this ole slick's mule. I love the ole girl too much to put a beat in her. Going to look around for a shorty 68 or ? for the 414 build.

 

Bob, I will do some math tomorrow and guess at some compressions. The H395Ps are frequently cheaper because they are supposedly 360 pistons and noone usually wants them. The H304P is an okay truck piston, it has the same 1.759 hieght as the H395P does, but it has a dish in the top. A dish in and of it self isn't always bad, but the H304P's dish, according to the books, is 3& 1/2 inches in diameter, which means you aren't getting much for quench. Why are you looking for pistons from Summit ? Can't your machinist get pistons ? Or he the character who got you the 381P/1139s ? Keith Black's KB150 is a step head D-cup which would be excellent in a truck, and the silvolite 1131 and 1116 would do very well also. The reason that I wouldn't automatically use the H395Ps is because they'll sit .031 down the hole, and when paired with the felpro blue headgaskets most guys use ( .041thick ) the resulting quench of .072 is too loose. To get good quench, you could mill the block decks .030 but once you tighten up the quench the flattops will give you something like 10 to 1, maybe a little more. In a DD truck that gets occasional tow duty, thats too much for gasoline. DinosaurFan, on the old work 'puter

 

Just ordered the 395P off summit seconds ago so it is what it is... , now hopefully the machinist hasn't gotten the other 381P and started balancing over the weekend LOL. No the machinist can get them and no he didn't get the 381P's for me. That was Larry's Performance in Montebello CA The whole .030 piston thing has been a real PIA frankly. No one seems to have anything decent "in stock"
Why not summit ? Going beyond basic for this thing just seems a waste 35.00+ a piston for a run around truck is just BS IMO.. I'd like to have a good peppy truck but don't need a beast by any means. Hopefully the 395's will chirp it up just enough. With the 343941 cam "I think" the reliefs will be a good thing vs the flat top as the lift is quite a bit more than stock cam. Fingers crossed

 

Red, from doing some quick math, if you use the H395Ps and the felpro 1020s you'll end up with 9.1 to 1 compression. This is by no means too much, but with the .071 quench distance, it is going to ping like there is no tomorrow. When the quench gets to be more than .060, it just doesn't do much anymore. I like to see it no bigger than .050, and would consider .025~.030 to be about perfect. You could get some of the thinner steel shim gaskets- like most FEs had from the factory, .017 thick, and give your self 9.5 to 1 compression and have .047 quench clearance. That would be spunky and shouldn't ping. Whats up with the grandmother cam though ?!.......You could easily step up to the '801 cam ( 222/234@ 050). I have that one in a 2wd with an auto tranny and 3.5 axle gears.....it tows trailers and does just fine. DinosaurFan, on the old cast off work 'puter

 

The block was decked about 7 k and the heads were surfaced as well. So there should be less than what were thinking. The original gaskets were steal shims so ? I dont wanna deal with them leaking but...I'll be mocking things up before the stuff gets to outa hand. The old 352 runs on 87 and doesn't ping at all. The original pistons were flat tops and the replacements had the valve reliefs so ? One thing this engine aint is some street strip motor, It's for a truck so we'll see where things end up when we get it on the stand and start measuring.

The cam came highly recommended here and other places as a dual use cam, ok performance, good low end, and just fine for towing.

 

Red, good plan on the mockup and measure things. If your block was shaved .007, the H395Ps will still be sitting .023 down the hole......with .041 thick felpros on top will still give .064 clearance, too much for effective quench. If you ran the single thickness shims at .017 plus .023 would give you .040 quench, very good. There is no reason to fear the steel shim gaskets, they work just fine. I still think your cam is too small, but its your truck, not mine. When you want to build something using the 1UB crank, I'll recommend the Cam Dynamics 238/248@050/589/616 stick that is in my 421.......that one is kinda raspy, the '801 is still a *****cat. Keep us posted how things go. DinosaurFan, on work's old unwanted and cast off 'puter

I should add that the 352 had very tall pistons, and a very good quench distance, and thats a very big part of why it didn't have ping problem even with enough compression and its flattops.....

 

LOL... 4 of the 8 pistons arrived today in a box with a really cool hat and a magazine so I can order more BS!! Two of the pistons say Made in U.S.A. and 2 say simply INDIA inside LMAO!!! and they ain't half as pretty. I weighed them on our ink scale USA comes in at .854994/.85100kg and the cow brand comes in at .834900kg +/- .00035kg between the two. I can only imagine what is still on the way LOL...

My real concern here is the metallurgy scenario between the two. USA/INDIA I assume they have to be close enough right ?

 

Oh boy. You might wanna chime Barry R or search the archives. He might be able to supply the metallurgy difference info. I remember reading something about those now being made in India. Looks like they got production going after all this time. Least you got a nice hat outta the deal??

 

Well I decided to send them back and get the KB1131's which I just realized have a pin height of 1.88 which seems a bit much really. But in looking at the math I think that is a **** up now. Crap am I .097 above deck now ? This is really starting to **** me off.

 

RedBob, you did the right thing sending the others back. At the shop I'm with we return a distressing number of piston sets. As soon as a set comes in it gets measured and weighed. If the slugs vary by more than a few grams and 2 or 3 tenthousandths, we write SCRAP/JUNK all over the box in big black marker and send them back. Happens more now than it used too...and my memory and charts tell me the silvolite 1131s are 1.76 tall....you should be fine. DinosaurFan, on an old 'puter work threw out

 

1131 are 1.88 dont know for sure but that is what summit has listed. On that note I just got a set of L2291 .030 for 125.80 + tax THANKS GLENN!!!! I ****ING OWE YOU 1 BROTHER!!

 

Well good I'm glad they had them. But be sure they are as advertised when you get them. They should be forged too!! Anything TRW with a "L" prefix is forged. If they are that's a helluva good price!!! And save and print out the page with the numbers from their site to double check them. Egge has been ok by me in the past for parts and service. Good luck!!!

 

Bob, summit is wrong, no big surprise there........ the 1131s are 1.76 tall. But you'll be fine with L2291Fs. This really shouldn't be so time consuming or difficult, have you considered dealing anyone other than Summit ? They are far from the best in my book. There are lots of guys who are familiair with FEs and this shouldn't be that big of a deal. DF

 

OK i don't know if these are forged or not, no idea how you would tell. What I think is they are is repops of the forged pistons, Egge casts their own according to the online (About Us).
Anyone know how to tell a forged from cast ? i dont see the 2291 imprinted/cast into the piston any where. Still need to verify the pin height with the originals but..
For the price and to know they are "AMERICAN MADE" I'm way good, an American has a job and a FE will be on the road soon!! $149.34 to the door step/. Not to bad IMO 24 hr turn around.. Pretty Damn good IMO!!!

Thanks Glenn!!

 

Forged would be smooth inside. On the cast slug it's a bit rough inside and you'd see some sort of parting line from the sand cast. Can you take a pic of the inside??

Wow that's pretty fast service!!! And yep US made. Bring em to work Mon and see what they weigh.