9 replies to this topic

[scotty_18]

I have a 998cc, and was thinking of converting it and putting a 1.3 engine in it. what else do i need to do as in breaks, wheel size etc...??

[Mart8V]

Not a lot is the answer!

Buy a Haynes manual, source a decent 1275 unit, remove old 998, replace with 1275.

If you have some £££ and time, get the engine reconditioned and the gearbox checked over before dropping it in with a new clutch and swap everything over. I am no mechanical expert but with an engine hoist, time, patience and lots of help from the guys on here it all came together.

Alternatively, spend the money on getting your 998 to perform. With the right additions you will get almost to 1275 power with a lot less hassle in some cases.

[willydc26]

i actually just this, except i did a bit more work. i was changing from a 998 auto, to a 1275 standard. so i went ahead and changed the subframes, and went to solid mounts, because i have a flip front planned for next weekend.

i managed to the job in 12 hours, split over 2 days. 6 hours a day. i did it all by myself, with an engine hoist, and 3 floor jacks, and two jack stands. took some fanagaling, but it got done. my advice to you, is soak everything in wd40 the night before.and when removing the engine, remove that carb. it made life so much easier that way. and thats all i had to remove, both for taking the engine out, and putting the engine in.

[scotty_18]

well im not doing it just yet, i want to buy a 1.3 engine, but i need to know what else i need to change in order for it to not cause me any problems in the future. like what wheel size is best? can i keep the 12''s i have on my car now? do i need bigger brakes? i want to tune the 1.3 engine so it is up to approx 90 BHP, if not more. I do want to tune my 998, but im sure the 1.3 will be faster which is what im looking for.

[Ouster]

You can keep your brakes and wheels. You might want 4-pots with a tuned engine and doing a lot of high speed stops.
You'll need a bigger carb, and perhaps a distributor with a different advance curve

Are you going to be building the 1275 yourself? Getting 90 bhp will involve stripping it, a possible rebore, fitting a sportier cam and getting a fancy cylinder head.

[scotty_18]

No i was going to buy the 1.3, then tune it up as much as i can. im really stuck for decision...
Whether to get as much as i can out of my 998cc, tune it up as much as i can.

OR

buy a 1.3 and tune it up to 90 BHP.

What would be the cheapest or best thing to do for my car???

[THE STIG]

just to point out everyones saying he can keep the brakes he has, but nobodys bothered to ask what brakes he has !!

just because he has 12" wheels fitted does not me he has disc's he may still have drums fitted

if you have the standard 8.4 disc brakes they you dont need to change them

but could upgrade to mtroe 4 pot cailpers once you have more power

Edited by THE STIG, 08 March 2010 - 11:28 AM.

[scotty_18]

I have discs at the back and single pot discs at the front? thats just a wild guess.

[jaydee]

I have discs at the back and single pot discs at the front? thats just a wild guess.

Err..no you cant..no mini come out the factory with single pot calipers, niether with discs at the back..

[scotty_18]

I have discs at the back and single pot discs at the front? thats just a wild guess.

Err..no you cant..no mini come out the factory with single pot calipers, niether with discs at the back..

i was wrong then i have discs at the front and drums at the back.