1 fast z Posted October 26, 2005 Share Posted October 26, 2005 Ok, so I am in the very final stages of the stroker build. Everything else is completed, ie. balencing, cleaning, boring, honing, checking clearences, fitting bearings, yada, yada, yada. Pretty much all that was left to do was lighten the pistons, and balence them when I was completed. Well, here is some of the work I did. I have went to a 3mm larger bore (89mm). The stock piston and pin has a mass of 535 grams, and this is for the early dished series. My piston with the larger bore, has a mass of 404 grams. this is including the wrist pins BTW. My piston without the wrist pin, has a mass of 320 grams. I maintained all of the critical thicknesses as well, ie. .200" dome, .185" under the ring land, .090" side skirts, etc. I am really excited to see how "rapy" this motor is going to be, with 12-1 compression, 6 ITB's, lightened flywheel, pistons, harmonic balencer, etc. Cant wait to drop her in, which should be next week. The wrist pins are H-11 Tool Steel, .090" wall. The pics dont really do the finish justice, the finish came out really smooth, but looks like scratches in the pics. http://www.bandmzcars.com/pistonlighteningpics007.jpg Quote Link to comment Share on other sites More sharing options...
Dnaught14 Posted October 27, 2005 Share Posted October 27, 2005 looks cool, i'll be curious to see what it does for the performance of the engine. When you crunch out all the numbers your losing 1.73 total pounds of piston which is .28 pounds per piston. Looks cool. Hope they have some durability, that would be cool. Quote Link to comment Share on other sites More sharing options...
Sparks280zt Posted October 27, 2005 Share Posted October 27, 2005 pretty intrested to see if you can get into the 12s! werent u in the 13s on your old motor that you cooked at MSA? Quote Link to comment Share on other sites More sharing options...
1 fast z Posted October 27, 2005 Author Share Posted October 27, 2005 Yea, I hit 13.9 with the stock short block, yea, should be able to hit 12's. Quote Link to comment Share on other sites More sharing options...
dapiper Posted October 27, 2005 Share Posted October 27, 2005 Are those Arias? Quote Link to comment Share on other sites More sharing options...
POSTM Posted October 27, 2005 Share Posted October 27, 2005 Looks nice, but I think you could go a lot further. I was friends with old guy that used to race formula V (1200cc VW motor). When he lightened his stock pistons there was like ¼ of the piston left (those square corners on the under side were rounded off), and look at the Dodge Neon OE pins they are tapered inside and they felt a lot lighter to me. The formula V’s were always built after a race though. Let us know how they work out, pretty interesting. Quote Link to comment Share on other sites More sharing options...
clarkspeed Posted October 28, 2005 Share Posted October 28, 2005 That looks nice! I'm in the early stages of preparing a stroker race motor. Did you use a diesel crank? What did you do to prep it? I was thinking about saving some weight there also. Quote Link to comment Share on other sites More sharing options...
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