340 Pistons - Moparts Forums

Register Log In Moparts Forums Unlawfl's Race & Engine Tech 340 Pistons

Print Thread

Page 2 of 2

1

2

Re: 340 Pistons [Re: 1Fast340] #2407486 11/22/17 05:02 PM 11/22/17 05:02 PM
Joined: Jan 2003 Posts: 16,376 D dogdays I Live Here
dogdays I Live Here D Joined: Jan 2003 Posts: 16,376	I get it. The custom piston is your best chance then. RaceTech as mentioned above has a good reputation. Diamond is another. Did you know that people are making billet pistons nowadays? Another option. I just finished rewatching the Stieg Larsson Millenium trilogy. I saw the Swedish version first and it ruined the American version for me. An American film company getting ready to shoot the second book now with a different actress as Lisbeth. My conclusion? You Swedes are crazy! And how about the Swedes who are into American cars? Double crazy. Everything you buy is twice the price! We are having our national holiday Thanksgiving tomorrow. Traditional main dish is roast turkey. So every year the President has a ceremony in which he pardons a live turkey. The turkey is thus saved from the axe and lives out its days in the Washington DC zoo. Happy Thanksgiving! R.

Re: 340 Pistons [Re: 1Fast340] #2407535 11/22/17 07:01 PM 11/22/17 07:01 PM
Joined: Jul 2009 Posts: 413 Norway (old world) Oyvind Mopar mopar
Oyvind Mopar mopar Joined: Jul 2009 Posts: 413 Norway (old world)	If you have a forged crank, you can weld up the old balancing drilled holes, no need for mallory metal then.

Re: 340 Pistons [Re: fast68plymouth] #2408372 11/24/17 06:46 PM 11/24/17 06:46 PM
Joined: Feb 2007 Posts: 2,578 sweden 1 1Fast340 OP master
1Fast340 OP master 1 Joined: Feb 2007 Posts: 2,578 sweden	Originally Posted By fast68plymouth My old 340 had the trw flat top pistons in it at first. 889g piston and pin. This was around 1992, and there were no off the shelf light weight pistons for it back then, or Eagle rods. I had Ross make me some custom pistons with the "max weight removal" option, and set up for .927 pins. I also got some 75g tool steel pins from PPP, and bushed some 360 rods down to fit the .927 pins(removed balance pads, completely polished entire rod, resized with ARP bolts). The new piston/pin combo was 525g(450g piston/75g pin.......about 3/4 of a pound lighter than the trw's......each). I probably still have the balance card somewhere...... Iirc the bobweight was about 1850g. A lot of weight had to come out of the crank on that one. Thats a whole lot lighter,i bet that crank and block loved having a whole lot less weight punishing it!

Re: 340 Pistons [Re: dogdays] #2408375 11/24/17 06:53 PM 11/24/17 06:53 PM
Joined: Feb 2007 Posts: 2,578 sweden 1 1Fast340 OP master
1Fast340 OP master 1 Joined: Feb 2007 Posts: 2,578 sweden	Originally Posted By dogdays I get it. The custom piston is your best chance then. RaceTech as mentioned above has a good reputation. Diamond is another. Did you know that people are making billet pistons nowadays? Another option. I just finished rewatching the Stieg Larsson Millenium trilogy. I saw the Swedish version first and it ruined the American version for me. An American film company getting ready to shoot the second book now with a different actress as Lisbeth. My conclusion? You Swedes are crazy! And how about the Swedes who are into American cars? Double crazy. Everything you buy is twice the price! We are having our national holiday Thanksgiving tomorrow. Traditional main dish is roast turkey. So every year the President has a ceremony in which he pardons a live turkey. The turkey is thus saved from the axe and lives out its days in the Washington DC zoo. Happy Thanksgiving! R. Sometimes remakes of things ruins the whole thing and sometimes they are a whole lot better:) Sure there is a whole lot of crazy going on around here,but i also wouldnt want to live anywhere else,its a fantastic place to live regardless of some of the stupidness going on:) I hope you all had a nice thanksgiving! We will see where this goes but nice to see that there are a few options for the stock stroke option.

Re: 340 Pistons [Re: Oyvind Mopar] #2408376 11/24/17 06:56 PM 11/24/17 06:56 PM
Joined: Feb 2007 Posts: 2,578 sweden 1 1Fast340 OP master
1Fast340 OP master 1 Joined: Feb 2007 Posts: 2,578 sweden	Originally Posted By Oyvind Mopar If you have a forged crank, you can weld up the old balancing drilled holes, no need for mallory metal then. I did not think about that option,there are certainly a bunch of extra holes in that crank that could be welded up. That poor crank looks like it has gone thru a metal butchery with all its holes,a slug of heavy metal and places where a piece of a counterweight have been cut of,if it could talk.... Last edited by 1Fast340; 11/24/17 06:56 PM.

Re: 340 Pistons [Re: 1Fast340] #2408450 11/24/17 10:17 PM 11/24/17 10:17 PM
Joined: Aug 2003 Posts: 43,882 Bend,OR USA C Cab_Burge I Win
Cab_Burge I Win C Joined: Aug 2003 Posts: 43,882 Bend,OR USA	The NHRA blueprint specs. on the "stock" 1968 to 1971 340 called for between .015 to .030 positive deck height depending on which head gasket you used, that calculated out to be 11.25 to 1 compression with 63.?(CRS now) head CC We had Ross make us some NHRA acceptable replacement legal pistons and then back cut the rings and so on Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)

Page 2 of 2

1

2

Moderated by Al_Alguire, Hotwheelsjr, moparts, not_a_charger, RangerDan440, tboomer

Hop To

Powered by UBB.threads™ PHP Forum Software 7.7.1