RichieC
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| posted on 15/11/05 at 01:47 PM |
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Aprilia RSV Engine
Ill soon be on the look out for a bike engine and Im almost dead set on a carbed R1.
However, having had a look at Colibrimans selection, I am considering an RSV twin.
Ive had a search about and although its been thought about, Im not sure if anyone has actually gone through with it.
Ive riden an RSV and fell in love with the soundtrack but Im not sure how well suited to a BEC theyd be.
I understand they have pretty good ratios and that theyre also dry sumped both of which will make them suitabel, but id be interested to know how the
performance would compare to an R1 as I appreciate theyre down on outright horsepower (not the be all and end all I know) when compared.
Reliability of the early models asside, does anyone have an update on anyone using one?
Thanks and rgds
Rich
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froggy
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| posted on 15/11/05 at 02:07 PM |
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im using a tl 1000 engine in my reliant kitten which is mid mounted just started mocking up at the moment . check what the primary reduction ratio is
for the rsv as it will be higher than most 4cyl bike engines making the gearing even lower and more of a pain to cruise than the r1 engines etc
.stuart taylor has done it and it worked well .not sure about dry sump etc as the cornering forces work a bit different on a twinas its a bit like
doing a wheelie when its cornering fitted to a car . i think theres a torque advantage over the 4 cyl engines but they have a bigger rev range and
better gearing on the whole but i like the sound too so apart from the gearing im sticking with the twin
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RichieC
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| posted on 15/11/05 at 02:35 PM |
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Plugged the following into the excel sheet and its a bit dissapointing:
* Primary 60/31 (1.935)
* 1st 35/14 (2.5)
* 2nd 28/16 (1.75)
* 3rd 26/19 (1.368)
* 4th 24/22 (1.091)
* 5th 22/23 (0.957)
* 6th 23/27 (0.852)
Comes out with a top speed of just under 110 compared to the R1 at just under 120 (205/50/15) with a redline of 10k assumed (think this is about
right)
Bit of a shame that 
Rich
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jimgiblett
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| posted on 15/11/05 at 04:02 PM |
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What diff is that with.
I'm running a 3.38 with 185-60-14s with an R1 and it hits the limiter at approx 130mph.
With a 3.38 and 205-50-15 and the ratios you quote top speed is 120.7 at 10k.
The issue though will be more in relation to being a pioneer with this engine in a car.
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G.Man
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| posted on 15/11/05 at 04:54 PM |
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Would be very surprised if RSV maxxed out at 10k rpm...
But with all that torque, a 3.38 diff would be the way to go, and lovely engine note....
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jambojeef
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| posted on 15/11/05 at 05:11 PM |
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A great sounding bike but slightly lower red-line than you had though thought Rich(See http://www.bikez.com/motorcycles/aprilia_rsv_mille_1999.php)
/>
(Pop ups suck on this site but its pretty informative)
9300rpm I think? Looks like you're on the hunt for a 3.14 - along with everyone else!
Geoff
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G.Man
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| posted on 15/11/05 at 05:46 PM |
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9300 is max power, wont be max rpm tho...
if it is, get a duke...
Opinions are like backsides..
Everyone has one, nobody wants to hear it and only other peoples stink!
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G.Man
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| posted on 15/11/05 at 05:50 PM |
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redline is 12,000 on the RSV-R but maybe less on bog standard RSV
10,700 on rsv mille
[Edited on 15/11/05 by G.Man]
Opinions are like backsides..
Everyone has one, nobody wants to hear it and only other peoples stink!
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RichieC
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| posted on 15/11/05 at 05:57 PM |
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Ok I wasnt far wrong  at 10.7k it will do 116 mph vs 122 of the R1 (195/50/15 and me 3.62 diff).
Id have to be pretty sure about the servicing of an Aprilia too as Id not be happy if it was like a Ducati service interval and what actually gets
done (desmo screws etc - gulp).
Worth investigating though as an alternative. Cant help thinking that the R1s are popular for good reason
Cheers
Richie
[Edited on 15/11/05 by RichieC]
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G.Man
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| posted on 15/11/05 at 06:22 PM |
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aprilia's need attention to valve clearences more than dukes, every 4000m if I am not mistaken, dukes are not as bad as people think, well mine
wasnt...
Opinions are like backsides..
Everyone has one, nobody wants to hear it and only other peoples stink!
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pathfinder
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 posted on 15/11/05 at 06:33 PM |
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I’m putting one in a velocity, I was a little concerned that it wouldn’t be up to the job but speaking to a few owners it seems that a free flowing
exhaust and chip works wonders on this engine. I got a stolen recovered bike with all the kit on it for £900 the only downer is that I don’t have any
engine numbers (was purchased from a reputable dealer). Wasn’t going to post pictures because progress is slow, but shall post a few later, The prop
should be here in the week and I hope to have the manifold and stainless engine cradle done before xmas. I would advise seeing the engine run before
you buy as the ecu’s are notoriously bad on these bikes, it may not be as punchy as an R1 but the sound more than makes up for it in my opinion!
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froggy
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| posted on 15/11/05 at 06:57 PM |
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richie c if you havent bought an engine yet have a look at the tl 1000 engine .mine was my own road bike til it got written off and made 118bhp at the
wheel not sure what the rsv makes but the tl is plentifull and cheap to buy but like everyone else said its the gearing that lets them down.my car is
on ten inch wheels so you can imagine how low mine will be geared and i dont think you will have a long lived engine if you have to rev a twin that
hard all the time. im trying to use a chain drive system to cancel out the primary reduction so the engine delivers direct drive to the diff which (if
it works) put me on par with most other bec with my little wheels but maybe not handling. but it does have a roof windows and a heater!
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tks
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| posted on 15/11/05 at 08:19 PM |
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JUST GO FOR IT
just do it,
an lower diff is what you wil need..... or just bigger tyres.
i think i go the bigger tyres route because it increases also the ride high and an bit more high is never wrong...
Tks
p.s. the day we need to go fast (if we already cant with our engine) we always can swap it for another one...
my reason was that i like VFR eninge, technolgie (SEQ. injection) and i like the bloody noise it makes...
also it would be cheaper on fuel since fuel prices are raising with the hour.. and i like trips...
The above comments are always meant to be from the above persons perspective.
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Winston Todge
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| posted on 15/11/05 at 10:18 PM |
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Hey Rich,
I went through all this and came up with no good reason not to go for it except that there is less experience and hence less readily available help on
hand during the build (some people prefer this!?), the parts and servicing is a little more expensive than an R1, it's not tried and tested like
the R1 and therefore a gamble in my opinion for the type of car I'm building (reliable and practical... Don't laugh...) and also this
photo...
Also check out my 'Engines' section in 'Design' on my website... Not entirely finished yet but a few figures and things...
http://www.mnrvortxr1.co.uk/designenginepgone.htm
Mate, go for it! It would be an awesome motor no matter what... Might give SP motor a little look see though. A few people I've heard of have
great success grass tracking twin motored versions of these!
Chris.
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RichieC
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| posted on 15/11/05 at 10:43 PM |
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Hi mate,
Yeh, similar reason is putting me off, you dont want to be the first and realise its a nail
The big inline 4s are proven more so than the Aprilia, but Im certainly keeping my options open. Id be interested to hear about the ease of fitting
one (ie position of drive etc) and just the plain logistics of squeezing one under the bonnet.
I know where theres a will theres a way, so Im keeping an open mind - I just drool when I think of my mates with blueflame pipe mm mm
Diff wise, after the faff Ive gone through finding a 3.62 LSD - Im not swapping it
Keep the thoughts coming
Rgds
Rich
[Edited on 15/11/05 by RichieC]
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