According to www.geocities.com/olddat, the R16 in the Roadster is 9:1
CR and the H20 is 8.2:1 CR. What I'm wondering is, with the lower CR,
is performance much lower? Would I want to up the CR in the H20 to 9:1
to have comparable performance to the R16 per cc of swept displacement?
Could I do that by using U20 pistons with an H20 crankshaft, or would
I need to go with U20 crank/rods/pistons with a machined nose on the
U20 crankshaft?
--- James M Koken <james.m.koken@gte.net> wrote:
> I'm using the dished pistons. (forklift) Adding more volume to each
> compression stroke with the 2000 crank. Didn't want compression to
> get too
> high. Gas is expensive enough around here as it is. I'll check the
> PSI
> after the motor is broken in.
> Mike Koken
> Colo. Springs
> ----- Original Message -----
> From: "Adam Bradley" <ambradley@yahoo.com>
> To: "Greg Hare" <ghare@bellsouth.net>;
> <datsun-roadsters@autox.team.net>
> Sent: Sunday, March 31, 2002 12:37 PM
> Subject: RE: SR20 engine swap
>
>
> > It lives in many trucks in other parts of the world. In the US it
> was
> > originally forklift only. Its block is identical to a five-main
> R16 so
> > its crankshaft/pistons/rods can be implanted or an H20 block can be
> > dropped in a Roadster. From what I've been told the stock R16
> camshaft
> > is too mild and should be reground if stroking an R16 this way.
> >
> > I have an "R20" question. H20 pistons are dished and the
> compression
> > ratio is lower than an R16. Does a dished H20 perform much better
> than
> > a domed R16? Can I use domed or flattop U20 pistons with an H20
> > crankshaft?
> >
> > --- Greg Hare <ghare@bellsouth.net> wrote:
> > > Ok - well, hit me with some more info - what's an H20 live in -
> isn't
> > > that a forklift motor?
> > >
> > >
> > > -----Original Message-----
> > > From: owner-datsun-roadsters@autox.team.net
> > > [mailto:owner-datsun-roadsters@autox.team.net] On Behalf Of
> > > SLBESQ@aol.com
> > > Sent: Sunday, March 31, 2002 1:31 PM
> > > To: lahtinen_marko@yahoo.com.au; datsun-roadsters@autox.team.net
> > > Subject: Re: SR20 engine swap
> > >
> > > In a message dated 3/31/02 2:57:45 AM Pacific Standard Time,
> > > lahtinen_marko@yahoo.com.au writes:
> > >
> > >
> > > > It may not be for everyone but don't overlook the
> > > > option of a H20 swap into the roadster. A fair bit of
> > > > power, can be tweaked for more power, bolts straight
> > > > in, and it looks just like the R16 so can be made to
> > > > look as close to a roadster engine as you want to.
> > > >
> > > > Just a thought
> > > >
> > > > Marko
> > > > Sydney
> > > > 1964 1500 with R16
> > > >
> > >
> > > hear hear!
> > > s
> > > 67.5MIZU
> > >
> > > /// datsun-roadsters@autox.team.net mailing list
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> > > /// http://www.team.net/cgi-bin/majorcool
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> > >
> > > /// datsun-roadsters@autox.team.net mailing list
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> > >
> >
> >
> > =====
> > Thanks,
> >
> > Adam Bradley
> > '70 Datsun 1600 Roadster SPL311-28181
> > '66 Datsun PL411 sedan PL411-022447
> > http://www.picturetrail.com/abend
> > Yahoo! Greetings - send holiday greetings for Easter, Passover
> >
> > /// datsun-roadsters@autox.team.net mailing list
> > /// Send admin requests to majordomo@autox.team.net or go to
> > /// http://www.team.net/cgi-bin/majorcool
> > /// Send list postings to datsun-roadsters@autox.team.net
> >
>
=====
Thanks,
Adam Bradley
'70 Datsun 1600 Roadster SPL311-28181
'66 Datsun PL411 sedan PL411-022447
http://www.picturetrail.com/abend
Yahoo! Greetings - send holiday greetings for Easter, Passover
/// datsun-roadsters@autox.team.net mailing list
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