Engine Number Question

danbrisbane

Hi, would anyone know what the following motor would be:

ZDM851W4B*000579*

Think bike is base model 1989 851 we think. Also any idea of RWHP roughly say?
cheers

dudlington

Engine is Ducati 851 S3 , roughly 75 RWHP................if you are lucky.

danbrisbane

dudlington wroteEngine is Ducati 851 S3 , roughly 75 RWHP................if you are lucky.

cheers sir, 75s gunna be a long lap lol.

brad black

mine had 90 on the old dynojet i used to use.

griff851

75hp is for the 750 F1 crowd. We're talking Superbike here buddy. 😄 Says so on the side. 😁

dudlington

Can someone post a dyno chart of an 851 S3 in STANDARD form ???.

Bridgland

Shamelessly stolen from Brad's own site. Second set of charts might be what you are looking for (as long as Brad confirms it is standard)

http://www.bikeboy.org/ducati_comp.html

dudlington

brad black wrotemine had 90 on the old dynojet i used to use.

Standard or ????

Mr.R

No charts but...
My "Guesstimate" has always been around 87 rwbhp for a standard 851.
With the '92 851 knocking out around 90 rwbhp.
I very much doubt that I'm very far off the mark here.

Steve R

stiglarsenDK

851s3 92 spits out...

Here from my 92 851 s3 (This year it had larger valves , like a 93 888 I recall)
Chart is from first owner, bike std but w open cans, w chip for that. Still sits like when dynoed in US

danbrisbane

thanks gents, getting 110 from stock 996 so will see how she goes - cheers

brad black

90hp with open airbox lid and slip on mufflers, either std with the baffle pulled or termi. actually, std mufflers made much the same power on my bike.

well, 89hp. i have 3 variants of dynojet graphing software, and each give a different result for the same runs. std mufflers made maybe 1/2 less peak, but have a midrange hole though.

first graph here: http://www.bikeboy.org/851workinpro2.html

i never had an airbox lid to try on it for an "totally all std" run on the 851, but on my 888 an open lid made 2 to 3 more hp consistantly through the rpm range and at peak on an otherwise std bike (std mufflers) and 1 to 2 hp difference when it had slip on open mufflers fitted.

so i would say, on the dyno i used to use (upgraded 150 from memory) an all std bike would have had 86 or so, and 90 with open mufflers and airbox lid and eprom.

as a comparison a 900ss was 72 - 74, so they had about 15hp or 20% more peak power than a 900ss.

the new dynojet 250 that business now uses might be low 80 comparatively at a guess.