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Car Forum / MINI / November 2003modified head for the Twin point injection
Who makes the modified head for the Twin point injection? Given that this engine can only produce about 80 bhp with the standard ecu and no overfueling. Is a stage 2 head good enough? what constitutes a stage 2? Ported only? larger inlet valves? Or is stage 3 with bigger inlet valves and stage 4 bigger inlet and bigger exhaust? Confusing. I intend to fit 1.5 ratio roller tip rockers and I already have stainless steel single box rear section and piper cross replacement air filter (not just the element). Lots of people will sell you one but which one is best in terms of getting 80 bhp? Obviously I could go for the biggest valves and highest compression and still only get 80 bhp? So where is the optimum? If I speak to Janspeed/John Cooper Gar., minisport, minispares, minispeed, honeycrock, longman, swift......etc etc..... they are going to say get theirs arent they? ....and I am sure they will give good power output. Who has spent about ?350 to ?500 on a head with the other aforementioned mods (GSI as keith Calver describes in his articles) and dynoed their engine at about 80-85 bhp? Cheers Pad > Who makes the modified head for the Twin point injection? > [quoted text clipped - 22 lines] > > Pad > Don't know if this is any help, but I came across this on a chat room:- Nice easy question (Not) Whats the best mods to carry out on the MPi?? Answer: Stick a stage one on it and leave it at that until some sorts out the issue with the ecu. You may read in the mags that the GSI kit is about the maximum the current ecu can take. (Got to be careful now) I dont think that the ecu works well with the GSI kits (stage 3). I think (and possibly others on this board too) that the fueling is not quite what it should be. And therefore with the amount of extra ?? to go from stage 1 to stage three is possibly not worth it at the moment. So in short put a stage 1 kit on the mpi and then wait for a company to make the stage 3 work correctly with twin throttle bodies :-) I had my S style kit done and fitted by MED in Leicester and am most happy with it, but you dont notice a hell a lot of difference at first until the comp gets its head around it and re-sets itself, the the improvement is mainly in the form of better touque, which is awesome in the MPI to begin with. I now have my car back in New Zealand which is really just one long mountain range and its fabulous, but pre conversion Lis and I did the Italian Job and she struggled with the Swiss Alps etc. So i guess what Im saying is that the real imporvement is in hill climbing and long open road streches were she breathes better and is much smother. Only niggle would be that the 1.5 ration roller tips are a bit noisey, but once the revs come up they don settle down Tim > Who makes the modified head for the Twin point injection? > [quoted text clipped - 22 lines] > > Pad What spec is the head? Did you have it dynoed, if so how much BHP? Does it have any type of modified fueling? Cheers > I had my S style kit done and fitted by MED in Leicester and am most happy > with it, but you dont notice a hell a lot of difference at first until the [quoted text clipped - 39 lines] > > > > Pad the head was the standard off the shelf MED conversion that they advertise in Mini World etc. There was no changes made to the fueling etc of the car. The enginemangement system is self adjusting and will handle it all. I didnt have it dynoed pre fitting so it would have just been the standard Rover Cooper specs, but I have had it on a rolling road since and it registered a very respctable 155ft lbs of tourque and peaked at 85bhp in third, with the "supertouring" gearbox and 13inche wheels in dropped off in 4th to about 65bhp at the wheels, which Im told would be consitent with a loss of around 18-20% once its been through the gearbox and final drive. Im waiting till the Wellington Club has a dyno day at their local specialist tuners because he has a dyno hub system which is much more accurate and will produce a verifiable computer diagnostic as well. Im also now running her on 98 octane unleaded fuel and this in its self is providing much better performance and overall economy Tim > What spec is the head? > Did you have it dynoed, if so how much BHP? [quoted text clipped - 52 lines] > > > > > > Pad > Im waiting till the Wellington Club has a dyno day ... Is that a hint? splam maybe splam...is that an offer? Richard at the chequered flag used to run one for MOWoG every so often, so Im kind of hoping he it'll happen again, but Im in no great rush at the moment LOL > > Im waiting till the Wellington Club has a dyno day ... > > Is that a hint? > > splam Is this the road rocket or the phase 3 head? Pad > maybe splam...is that an offer? Richard at the chequered flag used to run > one for MOWoG every so often, so Im kind of hoping he it'll happen again, [quoted text clipped - 5 lines] > > > > splam Pass ? > Is this the road rocket or the phase 3 head? > [quoted text clipped - 9 lines] > > > > > > splam Is this the road rocket or the phase 3 head? Pad > maybe splam...is that an offer? Richard at the chequered flag used to run > one for MOWoG every so often, so Im kind of hoping he it'll happen again, [quoted text clipped - 5 lines] > > > > splam "tim_lis" <tim_lisNOSPAM@xtra.co.nz> wrote in news:2Xypb.7027$Mn.200519 @news.xtra.co.nz: > maybe splam...is that an offer? Richard at the chequered flag used to run > one for MOWoG every so often, so Im kind of hoping he it'll happen again, > but Im in no great rush at the moment LOL Okey dokey, I'm actually hankering for one too! - I missed the last one as I was hung over, and that was about a year and a half ago now. I think we're about due. I will raise it at comittee night tonight. splam |
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