42 replies to this topic

[twiggy]

80Bhp is more than little bit than a standard 998, your 1098 sounds like its got a spec with parts that don't compliment each other, would be interesting to hear your whole spec...

True dat! I would tell you the spec but I honestly don't know, had a 1275 Mayfair head, cam, 1098 block, stage 1 is as much as I know, rest came as it was... and its immaterial really because it went pop!

Anyway good luck with 80bhp

[welshdan]

Why not do it for:
A. Fun
B. Something different
C. A challenge

also you cant beat the look on peoples faces when you tell them its a 1 litre that's completely destroyed them.

i understand what you mean...

but how about when some chav comes storming past you in his 1.2 corsa with his cap on backwards and music pumping out.

bet you wish that you had started with a good ol' 1275 then...

Edited by welshdan, 16 November 2009 - 07:43 PM.

[Reece Jackson]

i see where you're coming from welsh dan but i agree with lirge on this one it is too easy to get high outputs out of n/a 1275's but theres something to be said if you get over 100hp out of a n/a 998 engine and in answer to the question on how much you can grab from a 998 on that question the sky is your limit set youself a target and go for it if you just want a driverable street motor go for a good stage one kit you will always benefit on even a standard motor from a rolling road session.i set my targets high i was aiming for just over 100hp atfw here is my spec which has not been cheap and definetaly not easy to source what i wanted:
Block:
998 a series bored +60
decked flush to pistons
pocketed to accomdate large valves and cam lift
Crank+rods:
12a1451 A series
arp bolts
centre main strap
10 thou regrind
ligthend
balanced with rods
polished extensively
wedged
tuftrided
crossdrilled
knife edged
micro polished journals
Cylinder head:
12g940 casting
37.5x31 plasma nitrated race valves
bronze valve guides
skimmed by 120thou
240lb double valve springs
extra large ports sleeved pushrod holes
Everything else
steel billet flywheel backplate
cintered paddle clutch
1.27.1 split rockers
megajolt mappable ignition
weber 45 38mm chokes
7.5" inlet manifold
all crankcase breathers possible
large bore lcb manifold
bp8eix race plugs
my result is around 100hp atfw about 85atw with about 90lb/ft torque at 8500rpm don't hesitate to ask any more questions mate!! cheers

[Dan]

afterall a moderately tuned 998 for example, will only just keep up with modern traffic, nearly all cars on the market will be quicker, definately the hot hatches.

That just simply isn't true. Have you ever owned such a car to base that statement on are are you just guessing? The OP was asking specifically for help regarding 998s.

also you cant beat the look on peoples faces when you tell them its a 1 litre that's completely destroyed them.

Every year when we go to Germany, people seem to need to know why our car is so agile on the road and in traffic and want to know what we've done to the 1275 to make it perform like that. It's a 998.

[liirge]

afterall a moderately tuned 998 for example, will only just keep up with modern traffic, nearly all cars on the market will be quicker, definately the hot hatches.

That just simply isn't true. Have you ever owned such a car to base that statement on are are you just guessing? The OP was asking specifically for help regarding 998s.

also you cant beat the look on peoples faces when you tell them its a 1 litre that's completely destroyed them.

Every year when we go to Germany, people seem to need to know why our car is so agile on the road and in traffic and want to know what we've done to the 1275 to make it perform like that. It's a 998.

This man knows what im talking about!

[welshdan]

afterall a moderately tuned 998 for example, will only just keep up with modern traffic, nearly all cars on the market will be quicker, definately the hot hatches.

That just simply isn't true. Have you ever owned such a car to base that statement on are are you just guessing? The OP was asking specifically for help regarding 998s.

also you cant beat the look on peoples faces when you tell them its a 1 litre that's completely destroyed them.

Every year when we go to Germany, people seem to need to know why our car is so agile on the road and in traffic and want to know what we've done to the 1275 to make it perform like that. It's a 998.

i have owned and drove plenty of 1275 a series minis in various states of tune. it is clear and logical that modern engines will out perform older a series, other than maybe some properly built race engines/forced induction engines.

if you think otherwise you are dilusioned.

[Dan]

So the actual (and less offensive) answer to the question I asked you is simply no. You haven't owned a 998 Mini. Thanks for your input.

[jaydee]

It easier to get results with large bore engines, but i'm with liirge, small bores are way too funny.

[sharps555]

liirge and reece how much is that likely to cost? puch for 100bhp seems alot lol didnt think this thread would bring up so much talk lol and cheers dan always listen to your post as you always seem to talk the most sence

alex

[jinjrich]

Why not do it for:
A. Fun
B. Something different
C. A challenge

also you cant beat the look on peoples faces when you tell them its a 1 litre that's completely destroyed them.

i understand what you mean...

but how about when some chav comes storming past you in his 1.2 corsa with his cap on backwards and music pumping out.

bet you wish that you had started with a good ol' 1275 then...

We use 2 998's and they more than keep up in the modern flow of traffic. Yes they are mildly tuned but we honestly dont need anything bigger. Apart from on the straights we can keep up with my mates 1275's no problem.

If you are really bothered about what chavs in corsas think about you then i really do despair for you.

[Reece Jackson]

liirge and reece how much is that likely to cost? puch for 100bhp seems alot lol didnt think this thread would bring up so much talk lol and cheers dan always listen to your post as you always seem to talk the most sence

alex

to get 100hp out of a 998 is very very rare mine hasn't cost me a lot what so ever but thats only because i know that many people from racing now that good bargains come around but anyway and im sure lirge will agree here i would say £3,500 plus and maybe a bit more in some cases which sounds a lot but it isn't considering when my cylinder head was new it was around £900 and it soon adds up don't hesitate to ask for any advice mate cheers

Edited by Reece Jackson, 17 November 2009 - 09:03 PM.

[liirge]

Reece, i think if you were to buy all the parts new and not pick up any bargains, then yer probably is around that figure!
but mines cheaper than that..
to say a 998 Mini wont keep up with modern day traffic is a little foolish, because what power the engine doesn't have compared to today's cars...the power to weight ratio certainly makes up for.
Something like a VW Polo, or a Corsa weigh in at about a Tonne, more in vw's case. that's approximately over 200Kg heavier than a mini...
oh Jaydee...the hours of endless hilarity!

[welshdan]

So the actual (and less offensive) answer to the question I asked you is simply no. You haven't owned a 998 Mini. Thanks for your input.

the answer is that i have owned one 998 mini plus driven at least one more. i wasnt impressed personaly.

its not an offensive answer, just saying it how it is.


and to the 'if i care what corsas think';

to me if you go to the trouble of building and paying hell of a lot of money to get a decent spec 998, it could be better applied to an overbored 1275. afterall, if you are making a performance 998, then you are interested in performance.

by starting off with a smaller displacement seems counter productive, as you wont be obtaining maximum pewer from an a series, hence the car wont be as qucik.

if it was me, sure id be happy with it to start with. but when you get used to it you must get a little bored and crave a bit more power. with a highly tuned 998 you will be at or near the maximum power output, so stuck with what you have...

[Dan]

If you don't think it's offensive to call me delusional for enjoying my car then you must have a different dictionary than I do. Driving on the street simply isn't about power, its about response and the 998 is a very responsive motor. To paraphrase, it's not all about cubes. The OP of this thread wants to know about 998s. There was a time on this forum when you couldn't open a thread about building a nice 998 without people taking over to tell you how foolish you were and how great 1275s are, I thought we were past that because lately there has been a lot of good advice thrashed out regarding small bore motors. It seems that this will always be a problem to some extent though.

[liirge]

The other point to make here is that, the 1275 motor is starting to become rarer, so why not look into performance mods for the more common 998 motor?