Terry,
The Carbs were at wide open throttle. I have no idea what the cranking rpm
were. It doesn't have much compression as you can turn the flywheel over by
hand when lying under the car. I'll let you all know what it is like when I
get my new High Comp head on.
Thanks
Trev
-----Original Message-----
From: Terry Rudd [mailto:[EMAIL PROTECTED]]
Sent: Thursday, 15 March 2001 23:44
To: [EMAIL PROTECTED]
Subject: RE: compression
Trev,
My first impressions are that 115 psi with the 76 cam is a tad low but I
don't know the S2 L20B engine that well. The 200B engine in stock form will
blow 170 psi and I've seen them blow 135-140 psi with the 76 cam. The crank
speed only has to be down 50 rpm to make the difference and whether or not
the reading was taken with wot. Compression pressure is specified at a crank
rpm of 350 rpm @ wot on most Nissan L engines if not all of them (I should
never say all, invariably I'm wrong (:-
TR
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED]]On Behalf Of Pooley, Trevor
Sent: Thursday, 15 March 2001 2:30
To: '[EMAIL PROTECTED]'
Subject: RE: compression
Pele, Terry, Bruce.
Just to illustrate what Terry said I have a series 2 bluebird with a wade 76
cam (quite a big cam). The engine is in OK STD condition but with the cam my
cranking compression ratio is only 110-115psi. My cam is advanced 8 deg.
Terry does this sound reasonable for cranking psi given my setup.
I really need to deck my head for some compression or get a peanut head on
the car!
Bruce you mentioned to me that Brad's car had to much compression and ran on
a bit. Do you know the cranking psi.
Regards
Trev
-----Original Message-----
From: Terry Rudd [mailto:[EMAIL PROTECTED]]
Sent: Wednesday, 7 March 2001 21:30
To: [EMAIL PROTECTED]
Subject: RE: compression
Pele,
Most L series NA engines have 170-180 psi @ 350 rpm (crank with wot), the
lower figure is for 8.5:1 engines, upper figure for 9.5:1 with factory CAM
and factory specs for min CP is ~160 psi. Change to a wilder a camshaft and
all this goes out the window as the CP will decrease markedly at crank rpm,
usually somewhere between 10-15%.
regards
Terry
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED]]On Behalf Of
[EMAIL PROTECTED]
Sent: Wednesday, 7 March 2001 7:19
To: [EMAIL PROTECTED]
Subject: Re: compression
Gday
Yeah im preety dumb but i new that, but im talking about figures, when they
do that guage thing and the bloke says 120 etc.. Whats the point(number)
where
the engine is rooted. Also has the list been working for everyone else, i
got
no meassages yesterday or today until about 1 hour ago then they all strt
flooding through from the past 2 days.
Pele.
Andy Nielsen wrote:
> Barbara,
>
> If the engine has just been reconditioned I would expect very good
> compression in all cylinders. If the engine is in fair/good condition I
> would expect good/fair compression in each cylinder. If the rings in a
> cylinder are shot, I would expect crap compression in that cylinder. If a
> piston has a hole in it, you will have no compression in that cylinder.
>
> Hope this helps,
> Andy.
>
> P.S. Sorry. I couldn't help myself.
>
> >From: [EMAIL PROTECTED]
> >Reply-To: [EMAIL PROTECTED]
> >To: [EMAIL PROTECTED]
> >Subject: compression
> >Date: Tue, 06 Mar 2001 14:46:34 +1100
> >
> >Gday
> >
> >What sort of compression should you get on each cylinder with an L series
> >engine?
> >
> >Pele.
> >
>
> _________________________________________________________________________
> Get Your Private, Free E-mail from MSN Hotmail at http://www.hotmail.com.
>
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