6 replies to this topic

[Agus1601]

HI guys! I have my car running very good atm but still need some more power!

 

My spec engine is this one:

 

- 1275 A+ engine

- +0,30 piston

- Full stg 1 kit (RC40 maniflow + k&n + bits)

- 123 distributor

- bosch grey coil

- champion n9yc sparks

- lucas performance lead set 8mm

- aluminum 3 core radiator

- hs4 carb with some tweaks (needle + spring)

- 3,44 original gearbox

 

I would like to get aprox 90bhp at the flywheel, so lets do a buy bits list to make that possible

 

Things I have:

- Lightened flywheel

- hif 44 (not in perfect working condition) a lot of needles, etc

 

 

 

I have been able to make it run like this

 

 

Any thoughts?

Edited by Agus1601, 25 November 2018 - 03:29 PM.

[Steve220]

A decent cam and headwork. After that, forced induction!

[nicklouse]

get it set up on a rolling road. the dizzy aint the best for the Mini.

[ukcooper]

as steve said

 

276 cam week car 286 track / weekend car

decent head stage 3 as called see turbophil

lighten the mini - tool; box and spare wheel sub box ect 

rolling road as said will help a lot lot after ya finished working on the spec's 

Edited by ukcooper, 25 November 2018 - 06:28 PM.

[Cooperman]

For a genuine 90 bhp at the flywheel you will need, as a basis, a really well gas-flowed head and a better cam.
Once you have these you should add an lcb exhaust manifold, a well-matched inlet manifold and a modified HIF44 carb.
Match these to an accurately assembled block/crank/piston assembly with a better distributor and you should achieve the 90 bhp figure.
However, to use this better power you will need a suitable final drive ratio.

[mikal]

Gear ratios?

[Cooperman]

A modified engine giving 90 bhp will give its peak power and peak torque at higher revs than a standard engine.

Thus it may be necessary to run a lower final drive ratio in order to optimise the overall performance.

 

One modifies an engine to improve the performance, so it is a good idea to match the gearing to the engine torque. For good overall performance a 3.44:1 FDR can be a good ratio as it is the same as the original Cooper 'S' 1275.