How to get 980cc A+
Turbo Mini Forums

Hi There, never attempted anything like this before.

If I wanted to build an engine with a CC of 980 max, what would I need todo? Short stroke 998?

Any thoughts?

Cheers

Jim

Team Racing

Get a 970 crankshaft fit in an A+ block. Easy.

Thanks vegard,
what CC will that give me 970?

I assume I need the the 970 rods?

Are these cranks easy to get hold of, or are they like virgin sheep in wales?

Edited by Jimster on 16th May, 2007.

Team Racing

The more over-square the better:)

I guess you can get away with regular S rods. but 970 ones would be beneficial at a guess. Yes this will give you 970.
I'd bite the bullet, and get a new crank. I've got an old one and i t's useless to be honest. Raced and abused.

Think about it. Billet crank, H-profile rods, and lightweight JE-pistons as per Miglia... Mmmmm

You'll only get about 810cc with a 970 crank in a 998 block.

Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
Stephen Hawking - "The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge."

Crap, Jim you'd h ave to start improving your spelling. I thought you wrote: "Like virgin sheep in whales". A bit different from "virgin sheep in Wales". However, I guess the first is rather scarce as well.

Overbored using 850 crank? Don't know how far this would get you though.
EDIT;

Just worked it out and with 74mm pistons assuming you could get them in a block you get 922cc.

Edited by Tom Fenton on 16th May, 2007.

what you up to jim?

Shortened 1275 block with the 970 crank would do it me thinks.

There is no sense crying over every mistake- you just keep on trying til you run out of cake.

you can NOT bore a small bore block to 74 mm!

970 stroke and standard rods and block will leave you with a VERY thin deck and is not advised. You could try and see of course...

Woops never mind just realised that wasn't directed at me :$

Edited by Badger on 16th May, 2007.

There is no sense crying over every mistake- you just keep on trying til you run out of cake.

you could ask a friend to make you a special set of rods and a crank!!lol!

JK

If Carling made Mini engines
it would probably be like this one!

Can i ask, why would you ever want to do this?

Hi,
I'm guessing some sort of racing regulation.....
Cheers,
Gavin :)

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1275, bore to 1380 then disable 2 cylinders so its 690cc, then supercharge it, (assuming this is for motorsport use with the usual 1.4* multiplier) thatll give you an effective 966cc

turbo 16v k-series 11.9@118.9 :)

Denis O'Brien.

Hi,
Evo .. You got the calculator out?
Jimster .. With Evos plan You'll get cheap tax too!
Cheers,
Gavin :)

Edited by Bat on 16th May, 2007.

VEMs Authorised Installer / Re-seller. K head kits now available!

WB/EGT gauges. Click here for customers write-up

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this has been botheringme all day


why why why!!!!

"Turbo's make torque, and torque makes fun"

"did you know you can toast potato waffles?"

ok, reason for this is to build a class B engine for Extreme mighty mini's it has to be under 1340 cc, but I'd be using a turbo, and a 16v head. I was under the impression if you used a turbi then it was a 1.5 multiplier. In the blue book is it 1.5 or 1.4??

Team Racing

and the main reason to go for class B and not C (which my car would currently fall into) is that space frames mini's are allowed in class C, so I'd be around 200 kg over the weight of the rest :(

Team Racing

Hi,
With the 16v head you're going to want short stroke to rev it to get the best out of the head.
An 850 with 60 thou 998 pistons will give you ... 936cc
Cheers,
Gavin :)

Edited by Bat on 16th May, 2007.

VEMs Authorised Installer / Re-seller. K head kits now available!

WB/EGT gauges. Click here for customers write-up

Visit www.doyouneedabrain.co.uk

My Mini build diary

It is normally a 1.4 multiplier, hence we run a 998 in upto 1400.

If your max is 1340 then you need a 957cc (assuming a 1.4 multiplier.)

http://www.twin-turbo.co.uk
http://www.hillclimbandsprint.co.uk/default.asp

A man without a project is like a like a woman without a shopping list.

1.4 multiplier is for hillclimbing and sprinting only.

For rallying it's 1.7.

The turbo multiplier id not a general MSA ruling!

You need to check the blue book AND championshp regs before you start this. The regs may prohibit forced induction for instance.

Fastest 998 mini in the world? 13.05 1/4 mile 106mph

i thought mighty minis didnt have a rule book and Roger Telow (spelling?) makes it up as he goes along.

as an example mighty minis are not allowed to have ported heads, except if your a friend of Roger then its fine!