924Board.org

augidog · Joined: 03 Mar 2003 Posts: 1360 Location: New Jersey

Does the 924 have a good squish area and optimized quench?
I say no on the squish and yes on the quench. But im just guessing.
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1978 924 95 mile daily driver.
Audi TB/POR174M/High Flow Cat/2.25" exhaust
I knew that positive thinking thing wouldn't work.

Ozzie · Posted: Thu Oct 19, 2006 12:38 pm Post subject:

I'll have some of what your using.
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Porsche 924 1984 (UK import) NA
Its AUTO and its BLACK
Montego Black on black/red
Engineer of Electro/Mechanical Systems Maintenance

augidog · Joined: 03 Mar 2003 Posts: 1360 Location: New Jersey

Vince Ponz · Joined: 02 Nov 2002 Posts: 3581 Location: Florida

Save your money. Get your hands on Euro pistons and put them in for a 15hp gain. Get it running right and you will be happy. I don't think we can make our cars that much better with what we have.
As you know I have done everything except putting in a turbo.
hey, I could be wrong.
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"Never let them see you sweat"
77.5 924 modified track car
79 931 Euro stock
88 924S SE
87 911 Targa stock

-nick · Joined: 16 Nov 2002 Posts: 2699 Location: Cambridge, MA

I don't think the n/a engines have *any* squish area. It's been a while since I had one open, but from Chrenan's pic -

You can see that the pistons are pretty far recessed into the cylinders. With the flat head, you would need a piston with a 60cc+ dish to get any squish with a reasonable CR.
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1980 931S
15psi boost, MS-II, EDIS, 951 IC, custom intake, Ford 5.0L throttle body, Forge BOV, WB o2, G31 w/LSD, 964 wheels, 968 rear sway, Bilsteins, 200# Welt. springs. A laptop, and a partridge in a pear tree.
1991 964 C4 Cabriolet

924guy · Posted: Fri Oct 20, 2006 1:02 am Post subject:

that reminds me, i need to start working out again, getting too much squish, and not enough quench..

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Eric
78 924
82 931 SE "smokey"
99' VehiCross
Y2K Honda Insight
http://www.cardomain.com/id/924Guy
Performance by Pasha

endwrench · Joined: 07 Dec 2002 Posts: 1631 Location: Victor, Montana

Nick is correct. I only chimed in to say squish and quench are the same thing. It is the area where the piston and the head surface come close together. Good quench is usually considered under .040". The NA piston sits a full .260" from the head!

Todd
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'79 924NA. Rebuilt 9.5:1, MSDS header, Mega Squirt Injection, MJLJ-EDIS Ignition, 1.6L Whipple Charger and Intercooler, 10lbs Boost, 944 Trans, Custom HD Clutch.
"simsport" said....superchargers are better than turbos its official!....

Joes924Racer · Posted: Sat Oct 21, 2006 2:10 pm Post subject:

So thats why we can deck the block
about .040 or.050 right tod
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1979 porsche 924 Na
1980 porsche Turbo 931GT Replica
Have u ever driven a turbo.

endwrench · Joined: 07 Dec 2002 Posts: 1631 Location: Victor, Montana