If i keep the car and get some cash from somewhere, i'm thinking of swapping R1 Bec to a CEC but not sure what will be most appropriate.

Got a 3.14 diff at the moment and quaife reverse which i wont need if i change, same for the engine.

Any ideas folks? Was thinking v8 but too heavy really.
Toyota 4age
ford lump
etc

cheers

With that tall diff what you need is a Rover V8, ideally 4.0 or even 4.6. Don't bother with fuel injection, a Weber 500 on an Edelbrock manifold will do nicely

John

you want a pinto

or I'll sell you my 2.8 v6

as the engine is a large part of the cost,#

why not just sell the car and buy a whole new one?

or better still swap with me

I think your MNR chassis is not wide enough for a CEC, there is no room for the gearbox and bellhousing IIRC.

Steve

quote:

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Originally posted by mr henderson
With that tall diff what you need is a Rover V8, ideally 4.0 or even 4.6. Don't bother with fuel injection, a Weber 500 on an Edelbrock manifold will do nicely

John

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when i went to collect my kit there was a red mnr with a v8 in it.

i've got a landy conversion with a rebuilt rover v8 in it that is still on my driveway doing nothing.

just not sure i'd use it enough either way.

if i sell it then i can see me getting a 3 series cab or z4 as i want the open top but need boot space for golf clubs as i travel to comps alot.
argh, stuck in thought

Out of interest, what's the problem with the bike engine?

Cheers,
James

I am sure the Red MNR with the V8 is a totally different chassis around the tunnel area.

Steve

Yep, most BEC MNR's have a very skinny tunnel.

Mine was constructed around the gearbox and theres only a feeler gauge worth of space round it.

I bought an alli RS200 bellhousing and thats too wide....

Steve

Early MNR chassies were built for BEC and CEC separately. The BEC chassies had a narrower tunnel at the front so you could have wider foot wells. The CEC chassis had a wider mouth to the tunnel so you could fit the bell housing and gearbox in. You may not be able to swap from BEC to CEC.

Why do you want to? It would be a lot of trouble and for what? A CEC 7 isn't going to be exactly civilised.

it just doesnt seem to give the drive and power i was expecting especially once i've looked at the youtube other mnr's and other r1 or bec's giving it some throttle..............

richard H,

IYour comments on the oomph, is this following on from your woodbridge day?

The reason I ask is that your BEC should not be topping out at 90, with a 3.14 diff it should be geared for 140 ish (assuming 15 inch wheels). my ZX9r BEC tops out at 115 ish and it will very quickly hit the limiter in 6th (on a track officer).

thats what i thought it should do, about 130 ish i had in mind but it needs to go into a higher gear really quickly and i'm in 6th at 70 mph pulling 7k revs plus.

i had an r1 as a biker and just thought the extra 200kilos was the reason for slowness.

not really having driven it far or long (500 miles since built) not sure what i was expecting. now i know.

might have to drive it a bit harder over a short distance just to see what happens.

got detling on saturdy so might poke around others cars too

richardh, can I ask at what revs were you changing gear?

7k at 70mph in 6th is about right.
I have 5VY R1 in mine and it is the same. I have 3.38:1 diff and 15" wheels.
I can't understand when you say you top out at 90mph if you do 70mph at 7K it is normally around 1k/rpm for every 10 mph so you should be doing 125mph if your redline is 12.5k.
Can you give us some more info as something doesn't add up. Have you had your engine properly setup? Is your foot flat to the floor at 90mph and it will not rev anymore?
I too think you will struggle to get a car engine and gearbox in the chassis.

I notice from your earlier post that you have a Koso dash, Is this properly setup? are you sure it is not reading 90mph and you are actually going at warp speed?

[Edited on 9/4/09 by stuart_g]

i seem to change gear about the 7k revs mark each time. cant recall exact speeds but hitting 11500 revs doesnt give me too much top end.

15 inch wheels on 15 / 18 psi

i know the quaife reduces top end a bit.

i'll take it out in a bit and see whats what

I agree it sounds like a setup issue.

If you find you have to shift to 6th by 70mph, and you're doing about 7krpm then, that means you're upshifting about 7-8krpm. So assuming you're not changing up for the sake of it, it sounds like a classic case of running too rich (perhaps too lean will have similar symptoms)?

When I replaced the racing can on my fireblade engined car with a more restrictive but quieter can, it obviously ran richer and just would not rev past about 7500rpm. Once I had it on the rollers and go the carbs tunes I was laughing all the way to 11750rpm

7000rpm the engine will only just be coming on song!

[Edited on 9/4/09 by gingerprince]

so it sounds like its running weak / rich.

best i take it to tts or similar to get it sorted if the intention is to keep it.

must admit it is fun if the road isnt gridlocked- bec clutches in traffic are a real pain in the ar5e.

maybe a mnr screen might be a good mod as dont like using the lid too often and sunglasses are not safe at all

Are you saying it wont rev past 7000 in any gear?

As you mention 70mph at 7000rpm , in top, that should take you on to 120mph at least (with a long enough road and a heavy enough foot) on the track of course

BEC to CEC avoid!

are you 100% sure the diff is 3.14?

defo 3.38 is the choice. i was meaning it sounds more like a 3.62 or higher if it tops out at 90. R1 Does not have the correct torque and gearing for 3.14. busa's and things usually use 3.14

much as I would love to say go CEC and chuck a real engine in it

I would ACTUALLY say, an R1 should go pretty well and would give my CEC a good run for its money under normal circumstances, so there must be something wrong.

Definitely get it on the rolling road, as you would have to do that anyway with any alternative engine anyway!

My ZX9r has less power than your R1, i also run a 3.62 diff with 17" wheels and it will brease 120mph, set up and wrong diff sounds like your problem, i went CEC to BEC and the difference is massive when it comes to pure excellerative fun.

just been for a blat (hardly)
koso dash is set for 4 stroke, 8 pistons.

in first it got to about 56-60 before needing to go into 2nd gear. (it seemed to splutter - revs no more than 8k)

2nd got about 70-73mph same 8k revs and some hesitancy

3rd got to 80 mph (non main road) at same revs etc

4th gear got to 90 (non main road) at a push

5th and 6th and best i got on the stretch of (non main road) was 98mph

Now this dash has multiple settings
ie 2 stroke , 1/2/3/4 pistons
4 stroke, 1/2/3/4/5/6/8/10/12 pistons

Cant seem to find if the 2000 R1 runs at 360 degree or 720 degree, which makes a difference!

I've played with settings but am at limit of guess work now.

Felt like it was running weak

cocked up a bit - its a 3.38 diff

not too up on bike engines - more of a v8 guy.

How do i do the needle thingy or is it just best to leave it to the pro's

cheers for help all

quote:

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Originally posted by roadrunner
My ZX9r has less power than your R1, i also run a 3.62 diff with 17" wheels and it will brease 120mph, set up and wrong diff sounds like your problem, i went CEC to BEC and the difference is massive when it comes to pure excellerative fun.

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Hi Richard, which day you going to Detling?
Steve (Amalyos ) & I should be there, prob on
Monday. He would be worth a chat to

GeorgeM

quote:

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Originally posted by NS Dev

quote:

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Originally posted by roadrunner
My ZX9r has less power than your R1, i also run a 3.62 diff with 17" wheels and it will brease 120mph, set up and wrong diff sounds like your problem, i went CEC to BEC and the difference is massive when it comes to pure excellerative fun.

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all depends on the "CE" used in the "CEC" LOL

With my lowly CEC I have no idea what it will do at the top end, as with only sunglasses on I can't see a bloody thing at 120mph, and I still have a gear to go!

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