$375 Engine Pinning In Minnesota
Senior Member
Joined: May 2002
Posts: 22,465
From: California
[quote name='BDC' date='Jun 2 2005, 11:59 AM']Like we chatted about on AIM Greg, I'd like to know the difference in engine knock chamber pressures vs. that of a very high horsepower engine producing high chamber pressures. It seems to me that for anything under several hundred horsepower, this might not be useful. From what I understand, the necessity for pinning an engine in this manner is to prevent rotor housing to iron housing deflection. Anybody happen to have any experience with 500+hp setpus that produced actual deflection not from engine knock?
The cars 've tuned so far haven't ever exhibited this but I have seen busted dowel lands as low as ~300's rwhp due to engine knock.
B
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http://avstop.com/AC/FlightTraingHan...etonation.html
detonation is in the neighborhood of 4000psi, normal combustion is 250-350psi. this is why i keep saying that it doesnt matter what you do to make the motor stronger, if it detonates its still gonna break.
normal combustion is a burn, detonation is an explosion
The cars 've tuned so far haven't ever exhibited this but I have seen busted dowel lands as low as ~300's rwhp due to engine knock.
B
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http://avstop.com/AC/FlightTraingHan...etonation.html
detonation is in the neighborhood of 4000psi, normal combustion is 250-350psi. this is why i keep saying that it doesnt matter what you do to make the motor stronger, if it detonates its still gonna break.
normal combustion is a burn, detonation is an explosion
Senior Member
Joined: Mar 2002
Posts: 126
Hey thought this was gone, sorry I am located in Chicago, we have it all set up on CNC for both 20B and 13B's used to use a drill plate and a HUGE radial drill. I'm not a too big a fan of dowelling but the studs I like.
Thread Starter
Senior Member
Joined: Dec 2003
Posts: 500
From: Minneapolis,MN
[quote name='banzaitoyota' date='Jun 8 2005, 05:48 AM']What Class of Fit are you using
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Define Class of fit
Clearences are same as stock for the dowels, no smaller than 1.5 mm for the wall of the pocket the dowel lands in.
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Define Class of fit
Clearences are same as stock for the dowels, no smaller than 1.5 mm for the wall of the pocket the dowel lands in.
Super Moderator
Joined: Jul 2002
Posts: 5,181
From: My BIG ol TURBO-DIESEL
[quote name='GMON' date='Jun 8 2005, 12:11 PM']Define Class of fit
Clearences are same as stock for the dowels, no smaller than 1.5 mm for the wall of the pocket the dowel lands in.
[/quote]
Class of Fit: Standard provided for eight classes of fit ranging from loose to heavy force or shrink fits
Also: See MAchinery's handbook page 605 (version 24)
Clearences are same as stock for the dowels, no smaller than 1.5 mm for the wall of the pocket the dowel lands in.
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Class of Fit: Standard provided for eight classes of fit ranging from loose to heavy force or shrink fits
Also: See MAchinery's handbook page 605 (version 24)
Thread Starter
Senior Member
Joined: Dec 2003
Posts: 500
From: Minneapolis,MN
[quote name='rootbeerdragon' date='Jun 11 2005, 09:49 PM']
Whooooo!!! GMON where abouts are you in Minnesota?? I'm in Brooklyn Park, i barly ever see a Rx7 around here
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In uptown by lake Calhoon. Shoot me a pm sometime.
Whooooo!!! GMON where abouts are you in Minnesota?? I'm in Brooklyn Park, i barly ever see a Rx7 around here
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In uptown by lake Calhoon. Shoot me a pm sometime.
