Technical Change Cinq to Carbs and different dizzy

[nav001]

Lo All,
Has anyone here seen the Cinq sporting on carbs and a dizzy that does not require an ECU used?

I am building a Cinq for use in Autotesting and I am trying to take as much pieces out of the car and to get as much power out of the car for as little money as possible.

Also any tips on cheap mods that work would also be most appreciated

Thanks in advance

Nav001

 

[rallycinq]

If you are using the 1108 engine, then find an Uno FIRE and use the dizzy from that, if you are 899ing it, a 127 should hold the bits.

Having said that, autotesting and carbs can be a problem, particularly on J turns. The electronics don'y weigh too much and they are at the right end of the car.

Construct a fuel cell in place of the 'baby changing unit', and remove the tank. Sort out the handbrake, change the rear glass to perspex, but watch the spec.

Cheers

D

 

[arseofbox]

If you are using the 1108 engine, then find an Uno FIRE and use the dizzy from that, if you are 899ing it, a 127 should hold the bits.

Doesnt the dizzy need a drive from a camshaft? (sorry, but I only know about the 2L TC in my garage as yet ) If so...does the 1108cc/1242cc camshaft have an appropriately formed end to drive the dizzy?

 

[nav001]

Thanks Rallycinq.
Some very useful info there. Most appreciated

Nav001

 

[sumplug]

you can run the ignition using a DIS box from a ford. Works very well.

Andy.

 

[Bushboy]

the distributor from an uno will go straight onto the head in place of the ignition coil holder the drive and everything else is already there

 

[rallycinq]

the distributor from an uno will go straight onto the head in place of the ignition coil holder the drive and everything else is already there

Thats the one, the mounts for the coils contains an O ring and plug gthat goes into the dizzy hole.

Cheers

D

 

[fordy]

just done a search and found this post, i was wondering about this, so once the dizzy is on and you have made the ,manifold for the carbs (say CBR 1000 or 600) you can completely remove the ECU and run on the bike carbs once they are setup.

what else needs to be considered?

 

[fingers99]

just done a search and found this post, i was wondering about this, so once the dizzy is on and you have made the ,manifold for the carbs (say CBR 1000 or 600) you can completely remove the ECU and run on the bike carbs once they are setup.

what else needs to be considered?

Fuel pressure. How to re-jet those carbs. Choke size. How to decorate the cave. What animal to kill for supper tonight.

 

[fordy]

why so bad - would give significantly more power than my 40mm tricker tb, and they sound evil, and i think i will go black and white in the cave and squirrel for supper lol

 

[Brooky]

I'd rather....and i am doing, keeping it injection and saving weight else where

 

[fingers99]

why so bad - would give significantly more power than my 40mm tricker tb, and they sound evil, and i think i will go black and white in the cave and squirrel for supper lol

I doubt it'll give more useable power than a tricker: what the engine will put out is going to be determined largely by the cam. I think what you may end up with is something with huge flat spots and no real gains and the horrors of carb balancing and clockwork ignition.

 

[allanhelen]

Oooooh the hours i use to spend tweaking the carbs on my old Lotus Elan+2 and my Riley Elf and my mad Mini's, I've lost whole weekends thanks to Delauto's, (but that could have been the petrol fumes) now you just plug in a laptop and Roberts you uncle.

I even had to show my mates son how to change the points on his mini the other day and then found myself telling him to stop being so tight and go and buy bloody electronic ignition

Edit forgot the various conertaions of Rover V8's one with 4 Su's Oh and the Triumph in-line 6 with 3 Stomburgs and the ford V6 with twin webers.......... give me fuel injection anyday of the week

 

[Oldschool]

why so bad - would give significantly more power than my 40mm tricker tb, and they sound evil, and i think i will go black and white in the cave and squirrel for supper lol

A carb will not give any more power than an injection set-up. As a matter of fact an injection system when set up properly will not only equal pek power but also give more mid range.

 

[Brooky]

just bung a couple of twin 45's on there

 

[fordy]

if i run 4 bike carbs over 1 single point injection unit there will obviously be gains when they are setup regardless of cam, logic tells you that 4x32mm choked carbs vs 1x40mm throttle body will draw in more air, suck harder, throw in more fuel and sound like the sky is falling down.

i will try to source my parts and let you know the outcome. thanks

 

[fingers99]

Don't be silly. On the carbs you're thinking of the chokes will be way too big. The size of the carbs doesn't determine air flow into the cylinder (otherwise I could run a pair of 48 Dellortos and make massive horsepower gains -- indeed, so could anyone).

It's a complete waste of time and effort, and any tuning book will tell you as much.

 

[fordy]

the choke size is 32mm and will be jetted to match, my dad is a tuner for race bikes and his specialty is older jap bikes on carbs, he is a carb GOD.

all i am saying is i WILL have a big power gain over a single point injection unit. Any tuning book will explain...

 

[cc1]

Your cylinder head has a max through put due to design limitations.
If you check the port flow rates then you will find that these depict the size of the throttle valve.
Bike engines are designed to run at higher rpm than standard car ones so unless you do some major cylinder head and bottom end tuning then larger throttles won't do much.

 

[fordy]

so the same would apply to bike throttle bodies then, if that was the case.
just the fact that each cylinder has its own flow of air and fuel will give an increase over the 4-1 share system that is single point injection.

we have fitted Fireblade throttle bodies to MX5 and they gave a massive increase in power and torque - i dont expect mad increases i know i will get a gain over my 40mm SPI though for little work and great sound