Big powered engine
Turbo Mini Forums

yes, and it is expensive when you have been sast in the paddock warming up the engine your heat gets bumped up and you forget to change the plugs and run the heat only to destroy your engine having oblitorated a plug which then dropped into the bore (oh the nightmares are comming back)

mind that said nothing sounds quite as nice as a big A series with full works head and split webber 45's and an exhaust as long as ure arm

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MikeRace, Mini13

Ric, my guess is you have built you car to be used on the track??

I don't think any highly stressed 5 port turbo engine over 200bhp will last long on the track being driven flat out at 20 min sessions. Personally, If I where you, I'd build an N/A 16v engine for the track. After all with 10's wheels and miglia slicks you'll soon find the limit of them.

This is why I'm keeping my car as is, and building another with a N/A 16v motor.

Team Racing

Easy 200+Hp.

Fit the biggest exhaust valves you can to a head with the biggest exhaust ports you can cut. Fit a 649 cam, run Methyl Tertiarly Butyl Ether with 4% Tetraethyl Lead and 2% Methyl Aniline. 3% Dicyclopentadiene and run about a 9:1 CR with as much boost as you can physically make. Should produce about 400hp at 14000rpm, I reckon

Here's a thought for you.

How about direct injection with a liquid oxidiser/fuel mix. No intake ports. Also using the inlet ports as exhausts with a custom grind cam. Something like Hydrogen Peroxide and Hydrazine. Failing that, something along the lines of this:-

Edited by Hedgemonkey on 14th Aug, 2009.

Bugger off, I'm getting there.

Huh?

Hydrazine? Isn't that an component of rocket fuel?

If something is worth doing, it's worth doing half of.

balls to all that if its a track pig drop in a busa lump stick a turbo on and scream away best thing about it is you can scream for 20 mins stop the car and it will start again unlike any highly strung mini or car engine

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MikeRace, Mini13

yeah,

tischtoff and pichtoff lol

hahahaha, seriously when i was racing at spa we had to let the caterhams cool off othewise they just plain would not start, the scroats who were using bike engined radicals and caterhams had a quick smoke then off they went.

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MikeRace, Mini13

cossierick, just go a PM from Monkey on here, i did the head for his motor last fall....... dont know the rest of the spec

hello there bud. just had a trip to the rollers at Slarks, with ur head etc on. it made 190 hp on like 22 psi of boost... second most powerful mini theyve seen then the head gasket blew lol. im running a more conservative 19 psi now. are you going to mitp? all being well ill be taking her up the strip!

cheers.

so there you have it rick , slarks rollers are low on average readings ... on peter baldwins rollers if would have made 300 lol......

My thoughts on this for what it is worth.

In theory you can keep putting in more air by upping the boost and as long as you maintain a cool charge, the power will keep going up. Ultimately you will start breaking things and that will be the limit.

Problem is getting a turbo charger that will work efficiently at the air flow and pressure ratio required to boost a 1.3 litre engine. There are not many options, but they are avaliable for up to 300+hp.

Intercooler size and placement is key. You need to keep the charge temps down to get the air mass flow. Hot boost is as much use as no boost.

Camshaft selection is critical. Still a long way to go in finding out what really works rather than peeps opinions on what is best. I'd love to get hold of a "Nic" cam to check it out. :)

Any cylinder head with reasonable mods will work. No need for radical work here in my opinion. An extra psi of boost will cover any deficiencies.

Then you need pistons and a bottom end to hold together.

Fuel injection will not necessarily make more power. But it allows more freedom in manifold design which can. Other than that EFi on the 5 port will bring into boost control, launch control etc that will help get the power to the ground. I know there are some people who say that EFi on the 5 port is a waste of time because you can get 250hp from an SU. That is only part of the story.

I personally feel that once you get over 200hp then you are in the zone where the chassis is going to determine whether you can actually use the power. Weight and stiffness are key factors.

That led me to the conclusion some time ago that a 16v head is not necessarily going to be any quicker over the quarter. I was pleased to see that Nic's continued development of his car has maintained the 5 port in the top running cars.

I expect to see 3 or 4 cars running 12 seconds this weekend. Bring it on

Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
Stephen Hawking - "The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge."

There as usual some very well thought out replies there Paul,

and as for the weekend,

heres my prediction,

jim's throwing us a red hearing with the road tyre thing,,he'll have some big 13" slicks on sunday,

Nic will again up the boost to silly levels in an attempt to stay at the front,if he gets away with it good for him, if not its the AA man a calling,lol.

sprocket, if he dares could turn in some good times, [100 hp nitrous are in my jet box ] lol.

Matt will of course be looking to re establish himself as a big power big hitter in the top speeds .

and then we have Tom, who ha sbeen cought with his pants down once this year and i suspect he won't be lokking to let it happen again.
i see a 11.8 out of the don this weekend. all things being right,

carl

WWW.FORCE-RACING.CO.UK PLEASE CLICK HERE

Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
Stephen Hawking - "The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge."

oooooh thats low!

Oi! I've lost the best part of a stone since May!

I would bet that Sat between 13:00 and 15:00 the fastest time of the day at about a 12.2.

or its going to be wet or damp if your not lucky..

I run a supercharger and I don't care the TB is on the wrong side.
VEMS + 12 PSI + Liquid Intercooler = Small Bore FUN!

turbo 16v k-series 11.9@118.9 :)

Denis O'Brien.

Wel thats definitly given me somthing to think about.

Jim, yes it will hopfully be mainly track use with like you say 15-20mins of pain. As you say i could easily destroy the miglia slicks but i supose they can be changed.

I think realisticly 180 is a true figure then based on whats been said and what ive been searching.

It would be nice to see some of you that are running in excess of 150+ how you get on on the track.

I think for now i shall just consentrate on getting the thing done and keep the main engine bits on one side till i decide how the car will behave.

In all honesty its going to take development to get the car good in the first place, i think only then i can decide what spec engine to use.

paul , i understand what your saying and nic is obviously pushing the limits til somthing breaks, i supose people like him and matt woods are still developing and moving forward with the 5port but id rather stick to a set formula that has been tryed and tested.

Rick

WWW.FORCE-RACING.CO.UK PLEASE CLICK HERE

Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
Stephen Hawking - "The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge."

i would like to see how an alloy 5 port copes on the track,

Because without targets wew would still be driving around in Austin A 35s ,lol.

carl

WWW.FORCE-RACING.CO.UK PLEASE CLICK HERE

i can think of at least one A35 i'd be quite happy to drive round in.

WWW.FORCE-RACING.CO.UK PLEASE CLICK HERE

Is it the 4 door black A30 with the full full race engine (A Series)?

Hydrazine is "diamine" or N2H2.
Whack it with Hydrogen Peroxide (H2O2)

and you get Nitrogen + 2 Water at god knows what temperature/pressure.

They used it in the V bombers, (I think). You could have a tank of each and inject it 1:1 into the cylinders where it would probably create mega high pressures and only need an exhaust. It's a pretty energetic reaction. Snag is that both chemicals are horrible in a number of ways.

Bugger off, I'm getting there.