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nascar type pistons and 13.1 on pump gas, is it possible????
http://www.woodsbuggy.com/phpBB3/viewtopic.php?f=3&t=13197		 Page 1 of 1
Author:  ridenrace6 [ Fri Feb 17, 2012 6:40 pm ]
Post subject:  nascar type pistons and 13.1 on pump gas, is it possible????
anybody ever run these super sqish pistons

http://www.aircooled.net/new-bin/viewpr ... d2=EPS0014
Author:  gasman [ Fri Feb 17, 2012 8:28 pm ]
Post subject:  Re: nascar type pistons and 13.1 on pump gas, is it possible????
I'm no rocket scientist but I call b.s.,how can changing the piston make 93 octane ignite right at 13:1 compression.answer for this question please,somebody enlighten my dumb ass,lol.Chad :mrgreen:
Author:  MadMike [ Fri Feb 17, 2012 8:54 pm ]
Post subject:  Re: nascar type pistons and 13.1 on pump gas, is it possible????
Me thinks you are smarter than yous think Gasman
Author:  hyde [ Fri Feb 17, 2012 9:51 pm ]
Post subject:  Re: nascar type pistons and 13.1 on pump gas, is it possible????
NO i have not but i make my own. And dont tell people you can run 13.1 on 93.
Author:  Aaron Creech [ Fri Feb 17, 2012 11:30 pm ]
Post subject:  Re: nascar type pistons and 13.1 on pump gas, is it possible????
It can and has been done by many. Its not as easy as just slapping the pistons in though. The chambers in the heads have to be modified to match the pistons and the cam needs to be ground on a different lobe center if memory serves me. For the costs involved you could buy ALOT of race gas to run a high compression conventional setup.
Author:  Baddvw [ Sat Feb 18, 2012 9:29 am ]
Post subject:  Re: nascar type pistons and 13.1 on pump gas, is it possible????
I'd rather stick with my current setup, I believe in what I run on now and it works just fine for me, why do people want to run the high compression anyways? I know it is extra free torque, but in my eyes, I'd rather have the reliability than the other way around, I have plenty of power like it is with the lower compression (11.5:1) I know I'd like to go for bigger, badder, better on the engine size, 2500 to a 2920, but believes that I should stick with the mild compression IMO......
Author:  gasman [ Sat Feb 18, 2012 1:17 pm ]
Post subject:  Re: nascar type pistons and 13.1 on pump gas, is it possible????
I know you can run this compression ratio on as low as 87,but that's in a motor with knock sensers and variable timing,ecu's,direct injected,motorcycles running computers turning 10,000 plus rpms,special intakes and cylinder heads that twist the fuel or mist it combined with electronics. what I was getting out of the article is buy these pistons and run low octane fuel at 13:1 in your buggy.I'm probably wrong but this is going to be hard to do on a n/a air cooled vw.just don't see how you could retard the timing enough or would want to try this,especially on a big stroked motor.motorcycles have been running this and higher ratios for years and Jaguar,BMW,Ferrari,all run these ratios as far back as early 80's.but they all did it with knock sensors and ecu's with some type of direct injection.I don't see a vw with dual 40's running 87 octane at 13:1 with just a new set of pistons.Chad :mrgreen:
Author:  hpfreak [ Sat Feb 18, 2012 5:46 pm ]
Post subject:  Re: nascar type pistons and 13.1 on pump gas, is it possible????
can anyone find any pics of the face of these pistons? from what im reading it just has a small dish in the middle and it supposedly creates a faster burn. a faster burn would magnify a detonation problem. only way possible would be with computer timing and an EGR valve or some kind of water injection to keep the cylinders really cool.
Author:  davehix [ Sun Feb 19, 2012 12:22 am ]
Post subject:  Re: nascar type pistons and 13.1 on pump gas, is it possible????
There was alot of post on the samba and shopforum about these but never any pics :roll:
Author:  Aaron Creech [ Sun Feb 19, 2012 1:17 am ]
Post subject:  Re: nascar type pistons and 13.1 on pump gas, is it possible????
You won't see a picture of them because when you purchase the from John @ aircooled.net you sign a non disclosure agreement.
Author:  ridenrace6 [ Sun Feb 19, 2012 2:57 am ]
Post subject:  Re: nascar type pistons and 13.1 on pump gas, is it possible????
check out also


http://www.lnengineering.com/type1.html


and here is plenty of reading


http://www.theoldone.com/articles/The_Soft_Head_1999/

http://www.nrhsperformance.com/tech_squish.shtml

http://www.thesamba.com/vw/forum/viewto ... er+squishy

http://www.thesamba.com/vw/forum/viewto ... er+squishy

http://www.thesamba.com/vw/forum/viewto ... hy&start=0

http://www.thesamba.com/vw/forum/viewto ... er+squishy

http://www.thesamba.com/vw/forum/viewto ... er+squishy
Author:  ridenrace6 [ Sun Feb 19, 2012 4:13 am ]
Post subject:  Re: nascar type pistons and 13.1 on pump gas, is it possible????
from my many years of reading and being in and around garages, mechanics, racers, and race shops,and of internet searches and readings for the past several years, my best guess at the design of sqishy pistons is that it is flat and raised around the outside all the way in to the edge of the conbustion chamber and then have dish in the center to match the combustion chamber, or my 2nd besst guess would be raised around the outside and a round dish in the center with a raised center (kinda like a soup bowl with a half a grapfuit sittimg in the soup bowl rounded part up) if that makes any sense :?
Author:  vwimplant [ Sun Feb 19, 2012 9:41 am ]
Post subject:  Re: nascar type pistons and 13.1 on pump gas, is it possible????
CYLINDER PSI controled with the cam will play major part. Example 2 engines both running 11:1, one with 140psi the other at 170psi, one will run on cheeper gas than the other.
Author:  vwtravis [ Sat Mar 03, 2012 12:26 am ]
Post subject:  Re: nascar type pistons and 13.1 on pump gas, is it possible????
Compression is where it's at!
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