24 replies to this topic

[Stevee]

Hey


right I'm building a engine the spec im aiming for about 75+ Bhp

Spec

1060cc engine pocketed
Flat top pistons
Cam (unsure what to run)
Duplex timing chain
1.3.1 rockers
12g925 or 12g940 head
stright cut drop gears
4 speed stright cut box or standard unsure as of yet.
3.444 final drive
centre oil pick up

then diff im stuck on
keep standered one or use one of these

http://www.minispare...=...5941&title=
or
http://www.minisport..._MSLMS0516.html

could anyone just edit to help please

thanks Steve

[stickycreambun]

SW5 cam? Or im sure a lot of people will say its quite tame and maybe a Kent 266 or 276 if you want it a bit lairy.

[benpopham]

1060cc engine pocketed
Flat top pistons
Cam (unsure what to run) SW5 would be good if you would like a nice road cam
Duplex timing chain
1.3.1 rockers
12g925 or 12g940 head - if the block is already pocketed then go for the 940, even a standard one would be fine.
stright cut drop gears
4 speed stright cut box or standard unsure as of yet.
3.444 final drive
centre oil pick up

Sounds like a good spec!

Iv got a brand new SW5 that you could have for £90, just taken out of the box and slid into the engine, but then decided to go with the SW10. Also got a nice 940 head that has had the exhaust valves sunk by 40thou to clear the block let me know!
Ben

[Stevee]

Thanks ben

ill see how much i get paid at the end of the month and let you know

[Guess-Works.com]

From considerable experience.... steer well clear of the minisport X-pin...

Although an X-pin is not totally necessary, if the budget will allow, use one, in fact use one in preference to the SC gears and drops...

Either the Minispares evolution, or one of mine.... http://www.guess-wor...play.htm?id=111

[Shifty]

Why do you need a straight cut box and drops on a 75bhp engine?

A standard rebuilt box will be fine.

I've got a similar spec in my elf.

1015cc
295head
sw5cam
ultra light flywheel and back plat
Guessworks refurb box
RC40
Maniflow free flow manifold.
Aldon dizzy and electronic ignition
Std rockers
3.44 diff

That made 50ish at the wheels and about 68 at the flywheel.

I've got a 276 cam to go in it as the sw5 is a bit tame, will also be fitting MED 1.3 rockers and having a little headwork done as the guides are a bit smokey

I'd have liked to have thought I'd get 70-75 when its done.

[Stevee]

ah that sounds quite a nice engine shifty thanks

and

Gusseworks i had a feeling minisports might not be to good, but ill properly order one off you & stright cut drops sound good if gear box don't need to much work then that save me abit more money

thanks everyone

[Sir Cheat]

Shifty, Whats it like with the 3.44 diff..? Think you could put a 3.6 diff in with out killing the motorway speed say at 60MPH going to the odd mini show?

I ask because im building a 998 up to around the same spec for my 79 mini.. not sure to go for 3.44 or 3.6 umm

Edited by Sir Cheat, 04 January 2011 - 07:35 PM.

[Stevee]

my engine is already fitted with the 3.444 final drive and i like it but ive only drove it round few roads before mini died ):

[Stevee]

would a standard 1275 head go onto a 998 and give more performance? if it dose ill get one and have it ported and polished?

thanks

[liirge]

would a standard 1275 head go onto a 998 and give more performance? if it dose ill get one and have it ported and polished?

thanks

Nope! Block will need pocketing or valves need sinking!

I'll post up the specification of my 998, I'm doing! or you can go through the thread! in my sig

[Shifty]

Shifty, Whats it like with the 3.44 diff..? Think you could put a 3.6 diff in with out killing the motorway speed say at 60MPH going to the odd mini show?

I ask because im building a 998 up to around the same spec for my 79 mini.. not sure to go for 3.44 or 3.6 umm

Its fine with the 3.44, I don't think I'd like to go any higher, especially when he's got a 276 in him.

3.44 is a good allrounder.

[Stevee]

yeah ill have the block pocketed

but i asked would it improve performance still?

thank you

Steve

[liirge]

BLOCK
Surface Skimmed
Over Bore
Honed
Pocketed
Chemical Clean
New Cam Bearings Fitted
Centre Main Strap
ARP Conrod bolts

PISTONS, CRANK AND RODS
Crank Regrind if necessary
Crank Lightened and Balanced (Wedged)
Con rods Lightened and Balanced
Pistons 998+ 120thou inc. Hastings Ring Set making a 1096
Bearings Mains
Bearings Big ends
New Oil Seals, Gallery and Core Plugs

CAMSHAFT and Valvetrain
Swift tune SW10-07
Kent performance Slot Type oil pump
Lightened Duplex and Fully Adjustable Duplex Vernier Timing Gears
1.3 Roller Rockers (MiniSport)
Minispares Double Valve Springs

CYLINDER HEAD AND FUELING
12G940 MG Cylinder Head
Unleaded
35.7 Inlet 29.3 exhaust valves
10.5 - 11 Compression Ratio/ Possible Skim
Twin SU HS4 Carburettors
New Needles
Ram Pipes 3”
Sock Filter
Facet Solid State Fuel Pump with Wired Inertia Kill Switch
Filter and Regulator

GEARBOX
MRA Minis Straight Cut Drop Gears
Gearbox Inspection and Replace where Necessary
FD 3.65
Centre Oil Pickup
Hardened Diff Pin

CLUTCH
Ultra-Light Balanced Fly Wheel and Backplate
Orange Rally Spec Clutch Plate
Friction Plate AP

THE REST
Megajolt V4 Ignition System with Rev limiter
Metro Rocker Cover
Custom Needle Profile
Rolling Road Session
Standard Mini Cooling System 2 Blade Fan
New Water pump and Belt
Damper pulley

Edited by liirge, 04 January 2011 - 09:10 PM.

[liirge]

yeah ill have the block pocketed

but i asked would it improve performance still?

thank you

Steve

Yeah its a good modification

Edited by liirge, 04 January 2011 - 09:12 PM.