bennjamin wrote:
Hey everyone....a aussie with questions for the bike engine build guys.
Recently acquired a honda S600 (600cc 4 cyl , RWD) with ideas of a replacement engine from a much newer bike.
The car sits as a bare clean shell on the chassis with drivetrain and engine inside.
What I was wondering is would it be possible to use the standard gearbox and drivetrain via some sort of adapter to a similar size (physically) motor ? The gearbox is a 4 speed that runs to 11000rpm and reverse. It tops out at 160km/h but could be changed with a different FD.
IF it could work how would this alter the power delivery of say a performance bike motor ?
IF it helps anyone the standard engine is about 19 inches long and 23 inches wide (all connected bits) for comparison to something else...R1 or similar.
Many thanks Ben
Hey Ben- I've just built an N600 BEC, and for awhile ran a T5 tranny inline (gave me overdrive and reverse).. this offered me 30 forward gears (and 6 in reverse!) and I could choose to shift via the bike's box OR the T5.. In the short time I had this setup, I found that the bike motor (VFR800) did much better performance wise if I shifted through the bike's tranny, as the T5 ratios were too broad, and the T5 first gear was so low it was useless.. the T5 was "ok," but in hindsight it was not worth the effort to include, and it was really nice to take that weight out of the car).. I ended up removing the T5 and it's 70+ lbs and just linking directly from the bike motor to the rear diff (you'll likely find you need your diff ratio somewhere around 3.0 as a happy medium for the car/ top end).. As already stated, I think your 600 has a funky chain drive pseudo-IRS.. you'll likely want to yank that (you're way past keeping it stock anyway, right
), and work in a different rear end of your choice..
Based on my experience I'll offer this too: Using a Guibo (rubber donut) is virtually mandatory for a street driven BEC- it will eliminate the BANG!!! shifting, and it will also get rid of that weird driveline oscillation effect that you're likely to encounter in a BEC at cruising speed.. I had mine setup without one for a time, and it was unpleasant for both me and the bike's transmission.. retro fitted a BMW sourced Guibo inline, and I've been happy ever since.. Also, if you must have reverse, just pony up now and get a FNR box (about $1200-$1500 US) and design it into your driveline..
Your S600 is a very cool little car, soon to be made much cooler with modern HP.. Please keep us posted on your progress, and include lots of pictures (we love pictures
)
--ccrunner
_________________
Dean
1972 Honda N600 Restomod "ccrunner's N600 VFR800 repower"
1963 Volvo P1800 Restomod
http://locostusa.com/forums/viewtopic.php?f=36&t=163091959 Berkeley SE492 Restomod...
viewtopic.php?f=36&t=19397"ccrunner's 1960 MGA coupe Restomod" found on MGExp.com