62 replies to this topic

[Wil_h]

Chosing the 998 crank over the 1100 is mainly personal preference. In reality even the 998 crank is a long stroke compared to the bore. The 998 choice gets you closer to a square engine (equal bore and stroke) but the 1100 option goes away from it (relative to a standard 998).

[stardude]

so is it good to have a square engine then??

i have never heard that term mentioned before.

[stardude]

bump

[Shifty]

currently my costings are looking like this:

Pistons and rings - £115-120 shipped from australia
Gearbox - £310 GW
12g295 head - £100 max
Cam kit - unsure of cost estimating around £130
Vernier Duplex - £85
Crank work - dont fancy spending any more than £200
Flywheel - £120
back plate - £80
Rally clutch - £50

block machining - unsure of cost.

and all of the other little bits that ned buying.

so that comes to £1190 without the block machining. so not far off

and if i can find an extra £270 i will be getting a nice set of drop gears for it too

My box is a guessworks refurb that cost me £75

The block was:-

Bored
Crank ground
new cam brgs
new big end and main brgs

That little lot cost me £275

Cam kit £225

I had a 295 head but had it overhauled and converted to unleaded
£200

Flywheel £120
Backing plate £75

New clutch £40

Pistons (2nd hand but new) £60

Gaskets/locktabs etc £60

Aldon Dizzy - £119

Aldon ignitor - £60

Manifold - £30

I had the exhaust already

Costs soon stack up and its easy to spend more than you think!!

I'd agree with the cam, SW5 is good and since my power figures are similar to coopermans it obviously works!!

I'd maybe go with the 276, also the cost of the Aldon stuff you could go megajolt.

My next stage is a supercharger!!!

[liirge]

Yes mate a Square engine is a good thing.. it makes the engine very balanced and revvy...
Still does anyone know what the bore would be on 998 +120thou ?
how did you work it out..i have a feeling im being excessivly dense...
How is that Aldon Dizzy? which colour did you go for,
i was thinking of having a custom advance curve made for mine, but i dont know how much that would cost..
Cant you turn up the radio..to cover the Straight Cut gears noise...
Minisport Australia...thats gonna kill me on postage isnt it!

[stardude]

Yes mate a Square engine is a good thing.. it makes the engine very balanced and revvy...
Still does anyone know what the bore would be on 998 +120thou ?
how did you work it out..i have a feeling im being excessivly dense...
How is that Aldon Dizzy? which colour did you go for,
i was thinking of having a custom advance curve made for mine, but i dont know how much that would cost..
Cant you turn up the radio..to cover the Straight Cut gears noise...
Minisport Australia...thats gonna kill me on postage isnt it!

the postage is cheap. the pistons and rings are $180 Oz dollars. the postage is $68 OZ dollars.

that only comes to around £120 in total.

it works out much cheaper buying them from abroad

[Wil_h]

+120 is 120 thou or 3.048mm bigger diameter.

Standard pistons are 64.6mm, so +120 are 67.65mm

Then a +120 bored car will have a cc of 1096cc, if my maths is right.

[liirge]

Hmm thats not too bad i suppose price wise. there will probably be a £10 excise duty on that.
the stroke a 998 is 76.2 so its getting closer to being sqaure, that 850 Crank would be good though as its about 68.2 but then i would loose the torque from the extra CC's. 1096 is pretty nice as its essentially a short stroke 1100.

[Shifty]

Where you asking me about the Aldon?

If so....!!!

I went for the yellow one without vac advance, was advised that it would be better.

The guy at Southam said it was advancing nicely through the rev range and was performing well.

[liirge]

Where you asking me about the Aldon?

If so....!!!

I went for the yellow one without vac advance, was advised that it would be better.

The guy at Southam said it was advancing nicely through the rev range and was performing well.

Yer i was should probably have made that clearer!
The yellow looks good, but im still kinda thinking of a custom curve and a Britpart Cheapy leccy ignition conversion.

[Shifty]

Depends on the engine, if its A and not A+ theres a guy on fleabay doing em for £80.

I did have a britparts in it, worked for 4 minutes and then burned out!!

I had it in my old Elf dizzy before with no problems. I think they don't like electronic ignition coils, if you get one play safe and use a standard coil.

Otherwise I'd be running one now, I had the RRoad booked for the following day and was stuck, hence the expensive Aldon one.

DOH!!!

[liirge]

Aaah i see mate, owwwch i bet that Aldon one was an expense not expected.
Im an A+ Engine.
Ok so i might buy 2 of those kits then incase one of them burns out randomly.

[stardude]

Ive just been in contact with AC Dodd and he reckons i would be looking at around 70hp/67-69lbft

but he has basically convinced me to go the 1380 route as it will serve my purpose much better, and last me longer.

although i may just build up a standard 998 with +120 in the meantime and a 12g295 head while i get the bits together for the 1380.

[liirge]

Yer but the novelty of knowing that you've got a 1 litre engine capabler of giving most stock 1275's a run for their money has gotta be worth it. I cant imagine there are going to be many issues in the logevity of the engine with your modifications?

[Shifty]

Exactly, why take the easy option??

I've been looking at the vmax supercharger kits!!

Mmmmmm