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Posted by: Demick Jul 16 2004, 08:48 AM

I've found a bunch of surprises while tearing down my engine, but none as big as what I found last night. I'm not even sure what prompted me to measure the cylinder diameter, but when I did I got quite a surprise. 96mm P&C's which means I've had a 2.056 motor all this time and never knew it! I feel bad that I've been running in stock engine classes for autocross for all these years - but then again, most of the people running probably don't know for sure the internals of their motors either. Mine was rebuilt over 20 years ago (that's 5 owners ago!).

So this really screws up my rebuilding plans. I had planned to do a stock rebuild using the higher compression euro pistons. I had thought that this rebuild would give me about 10hp over what I had before (5hp for the euro pistons, and another 5hp due to a fresh engine). But now I'm thinking maybe I should build the engine a little more agressively. Continue with 96mm pistons, but go higher on the compression like somewhere around 8.5:1 (my engine had dished pistons and probably a fairly stock compression ratio since I always ran regular gas with no problems). Maybe a little head work to get the engine to breathe a little better...... Hmmm..... Basically build the engine to the limit of what I can run with the stock d-jet F.I.

Decisions, Decisions. Luckily I haven't bought any hard parts yet.....

Demick


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Posted by: Bleyseng Jul 16 2004, 08:58 AM

8.5to1 is a good start for the compression ratio. Head work is where the hp is in these motors. I have dyno'd my 2056cc at 95hp which is about 115hp. If you can live with a crummy idle go to a better cam maybe one Jake has.

Geoff

Posted by: scotty Jul 16 2004, 09:40 AM

Very nice caliper you have there...

Posted by: jkeyzer Jul 16 2004, 09:45 AM

Uh oh, 2056... Britain is going to tackle you for your Autocross trophy now, huh.

Posted by: Britain Smith Jul 16 2004, 10:05 AM

Hmmmm...

Posted by: joes Jul 16 2004, 10:19 AM

I did 2056 w/ Djet web cam #73, kerry hunter and a regular valve job got 100hp on the dyno. Attached is the chart

Posted by: SLITS Jul 16 2004, 10:29 AM

You can have one too - Just three easy payments of $49.99 - Call today - our operators are standing by. If you call now, you will also receive a free.....................,

Posted by: newdeal2 Jul 16 2004, 02:38 PM

I have a webcam 73 grind NEW in the classifieds if anyone wants it. If it doesn't sell soon I am sending it back.

Peter

Posted by: swood Jul 16 2004, 03:55 PM

Yeah, and if anyone wants a set of Web-Cam performance lifters to go with it I've got a set for 100bucks, never used. I went Ceramic with my #73
.

Posted by: mistro Jul 16 2004, 10:55 PM

Demick. OT but did you have a write up on a third brake light under the roll bar? I tried to search for it and couldn't find it. Thanks. Rgds, Michael

Posted by: Demick Jul 16 2004, 11:01 PM

Michael

Just click the "Website" link at the bottom of any of my posts. That will take you to my website which has links to all of the different write-ups that I have done.

Demick

Posted by: mistro Jul 16 2004, 11:03 PM

Thank you.