12 replies to this topic

[Neb]

Does anyone know how to figure it? Is there a difference? I want to say there is but I would rather make sure first. I still need to find a rolling road (dyno as they are called here). After I find the stats on Tigger I figure it would be about pointless to post my finding until I can convert it from US to UK. Also what's the best way to tune a daily driver 998? Right now I'm running a stage 1 kit but in the hills it still pulls a bit hard. Also sometimes, despite the size advantage, it's difficult to pull out on the road with traffic. I'm still getting used to being in the Mini instead of my Hyundai which was easier to get up to 60mph. I don't like pulling out on the road and getting up to about 40-50mph just to slow others down cause that last 10-20mph takes a bit longer. (by the way I'm not cutting people off or driving like an idiot, I'm trying to avoid that but hills at a few of my daily highway entrances are killing me)

[mike.]

The next stage of tune on a 998 is a new cam and head. A 12G295 cooper heasd will fit straight on or you can get a standard 1275 head and get the block pocketed. Pair that with a 266/286 cam and a rolling road session and youl'll be laughing!!

That sort of spec usually makes about 65bhp, basically same as a 1275 but less torque

[minimarco]

1 hp = 1Bhp

the "brake" is a british thing

its like fries = chips and chips = crisps

Edited by minimarco, 17 October 2007 - 01:08 AM.

[Neb]

Guess I was confused again. I thought there was a difference. Any more tips to up the bhp on a 998 to tide me over till I can get ahold of Vizards and/or a few other tuner books?

[Neb]

GT4L
SPEC: 33.3mm In. 29.2mm Ex. Combustion Chamber Volume 24cc
12G295 casting. The ultimate small bore head. Modified to suit all fast road/rally engine specifications. Suits race small bores.


http://www.minimania...D/InvDetail.cfm


Is this the right head previously mentioned? What would be the best carb set up to go with the 12g295 head?

Edited by Neb, 17 October 2007 - 02:40 AM.

[minimarco]

GT4L
SPEC: 33.3mm In. 29.2mm Ex. Combustion Chamber Volume 24cc
12G295 casting. The ultimate small bore head. Modified to suit all fast road/rally engine specifications. Suits race small bores.


http://www.minimania...D/InvDetail.cfm


Is this the right head previously mentioned? What would be the best carb set up to go with the 12g295 head?

the one on minimania is a modified head from a 12g295 casting. i think minimadmike was talking about a stock 12g295 cooper head. which should cost less than half of the longman head....if you could find one....and unmolested...so you could molest (skim) it and get the CR right to work with you 998..and unleaded conversion + likely needs new valves and stuff. so it shouldnt be a bolt on thing. or instead of finding a cooper head, you could mod your standard head to stage 3 spec.

are you running on 12's or 13's

Edited by minimarco, 17 October 2007 - 05:53 AM.

[998dave]

1 hp = 1Bhp

the "brake" is a british thing

its like fries = chips and chips = crisps

No it isn't, the Brake is the manner in which the power is measured, using an brake dynamometer, for instance I use waterbrake here at work, but we're also getting a motoring dyno, which is electrically braked and will produce power to run the site, clever huh!

However it is about a direct conversion, there's also P.S. in Germany, and all sorts of others...

D

[minimarco]

1 hp = 1Bhp

the "brake" is a british thing

its like fries = chips and chips = crisps

No it isn't, the Brake is the manner in which the power is measured, using an brake dynamometer, for instance I use waterbrake here at work, but we're also getting a motoring dyno, which is electrically braked and will produce power to run the site, clever huh!

However it is about a direct conversion, there's also P.S. in Germany, and all sorts of others...

D

to my understanding, which is very limited, they are the same thing. the americans just dropped the word brake.

speaking of clever, a few gyms here are harnessing the power from the treadmills and stationary bikes to power traffic lamps and such.

[Jammy]

....A 12G295 cooper heasd will fit straight on....

No it won't! You have to measure the chamber size and if its not been molested before you'll need to skim the head to get the correct compression ration. This is very important, if you put the head on as standard then the engine will run very poorly!

[998dave]

1 hp = 1Bhp

the "brake" is a british thing

its like fries = chips and chips = crisps

No it isn't, the Brake is the manner in which the power is measured, using an brake dynamometer, for instance I use waterbrake here at work, but we're also getting a motoring dyno, which is electrically braked and will produce power to run the site, clever huh!

However it is about a direct conversion, there's also P.S. in Germany, and all sorts of others...

D

to my understanding, which is very limited, they are the same thing. the americans just dropped the word brake.

speaking of clever, a few gyms here are harnessing the power from the treadmills and stationary bikes to power traffic lamps and such.

They didn't so much drop it, as just didn't use it, they tried to go all SAE, however as stated they do correlate directly, as long as measured in the same place, e.g. flywheel, two rollers, chassis dynamometer, etc.

That is also quite clever! We've been trying to get our dyno's to run the site for ages, with up to six 12 litre diesel engines running tests we can have thousands of kW output, enough to sell quite a lot back to the national grid!

D

[Neb]

the one on minimania is a modified head from a 12g295 casting. i think minimadmike was talking about a stock 12g295 cooper head. which should cost less than half of the longman head....if you could find one....and unmolested...so you could molest (skim) it and get the CR right to work with you 998..and unleaded conversion + likely needs new valves and stuff. so it shouldnt be a bolt on thing. or instead of finding a cooper head, you could mod your standard head to stage 3 spec.

are you running on 12's or 13's

I'm running 12's. Tossing around a few ideas but want to get the mechanics and rust spots sorted asap. She runs fine a bit rich but I'm going to take care of that soon. I'm just looking for a bit more push for daily traffic and hills. The more the better, as long as she doesn't break every day, but budget is an issue.

[mike.]

....A 12G295 cooper heasd will fit straight on....

No it won't! You have to measure the chamber size and if its not been molested before you'll need to skim the head to get the correct compression ration. This is very important, if you put the head on as standard then the engine will run very poorly!

Yeah my bad. I basically meant it'll fit without the need for any block work.

[Neb]

What is involved in skimming the head? The reason I ask is because this is my first Mini. I don't know much. My dad knows a bit (he had 2) but he hasn't had one since the 80's when we lived in England. The closest shop I've found that KNOWS Minis is about a 12 hour drive from where I live and is calling it quits, at least for now.