[Richard Crofts]

Right people

I have a 2002 S which is running pulley, plugs, manifold, exhaust, intake with stock IC. Now she gets very hot and although has never shown signs of detonation or leaning out even WOT in 5th/6th at higher revs...I do worry.

So I want some bigger injectors just to be on the safe side. Now JCW 380s would probably be fine but with more tuning in my head for the next year or 2 is it worth it thinking small. My thoughtrs were to get some 400cc injectors as used on the RS cosworths and other vehicles. The problem I have is how do i know what can fit the MINI?

Does anyone have any boshe or similar injector fitments for the MINI that I can use my contacts to get. Part numbers/codes or even any importnat measurment I need to be able to work out what injectors would fit. Anyone have any short cuts to obtaining these 400 or similar injectors on the cheap...eg I know that on the sparkplug fron that colder Cosworth sparkplugs would fit the MINI (I have been told) and can be obtained for less than the JCW plugs so do the injectors have similar cross overs?

Is 400cc way too much ... is it thinking too small? etc etc

Advice please guys and help with what to buy in terms of manufacturer/model etc.

TIA

R

[Bhozar]

Personally, I was looking at 450 injectors, then running an adjustable fuel rail so as to adjust the pressure down now, and increase pressure when its needed in the future. Should give headroom from now until whatever tuning I go for, if I ever go for any more.

I think M7 actually drill out the OEM injectors. For some reason, I just dont like the sound of that.

I have read you want injectors with the OEM spray patern, rather than just some random injectors. Not sure where you could go from here. Helix(USA) had some larger ones listed on their site and so do GTT(UK).

[Cooooooperslad]

Rich, surely a GRS I/C would be a more effective way to prevent pinking and detonation? I'm sure someone said that roland stated bigger injectors only make a difference over a really high rpm (cant remember what) but on a reduced pulley MCS it is possible to get pinking over 4k rpm.

Hope this helps?

George

[Cooooooperslad]

GTT Injectors are Bosch IIRC

[Snowie]

Quote: Originally Posted by Cooooooperslad (original)

GTT Injectors are Bosch IIRC

Correct they are Bosch - well that is what Roland told me 2 weeks ago

I am running what Bhozar posted
GTT 450 cc with AFPR

Alan

[Richard Crofts]

Anyone got a model/part number for either the 400 or 450 boshe ones?

There are plans a-foot on the IC or CC front george It won't be fore reducing pinking...its for reducing post charger intake temps. The injectors will be for increasing fueling (mixture) if the ECU recognises its required at high revs WOT 5th and 6th. Does not appear a problem at the moment but I want to be safe and in future the performance mods i will do will probably require bigger injectors anyhow so its an idea.

Would I have to get the variable pressure bar guys if i did 450cc or would the ECU have anough ability to stop the bigger injector (using stock fuel rail, under stock pressure) from feeding too much fuel?

[Bhozar]

Quote: Originally Posted by Richard Crofts (original)

Would I have to get the variable pressure bar guys if i did 450cc or would the ECU have anough ability to stop the bigger injector (using stock fuel rail, under stock pressure) from feeding too much fuel?

The AFPR is a fairly cheap mod. I think the expensive part of it would be buying a AFR gauge so you know what its doing and to do the setup. PErsonally, I want to fit an AFR gauge anyway.

[GRSmotorsport]

Quote: Originally Posted by Bhozar (original)

The AFPR is a fairly cheap mod. I think the expensive part of it would be buying a AFR gauge so you know what its doing and to do the setup. PErsonally, I want to fit an AFR gauge anyway.

I fitted an AFR meter a couple of weeks ago, a worth while gauge to have

When I picked my car up from West Tuning Ray advise me not to do too many track days as the cars still running a little weak top end, this was after fitting 380cc injectors!. Knowing I was going to Castle Combe next weekend wanted to get this problem sorted out. Cossie injectors won't work as the impedance is lower, plus cossie injectors are physically bigger in size At the moment I'm seeing 12.2 AFR's, so hopefully the injectors I received from Roland today (450cc) will help reduce the AFR's to around about 11-11.5, I'll keep you posted

[Richard Crofts]

Yeah I though cossie would not fit but wondered if anyone had found out that X Y or Z cars injectors (bigger cc than stock or 380 JCW) would fit. Thus cheap big injectors for my MINI

My understanding is rolands GTT FPR has 3 settings low, med, or high pressure ?? Is this not right. I know a far more tuned car than mine with 450cc and GTT FPR and he says he's running it right down on pressure ... so mine would be ok doing the same.

However is it nessesary if I have 450cc injectors because surely the limiting factor on my car would be the stock FP not the injector. So nomatter how much the injector was capable of throwing in the stock rail could only push so much. In its current state of tune would 450cc injector be fuel overkill on stock rail (thus must have variable FPR dialed to bottom) or would the 450cc fuelk fine due to being limited by stock FP ... obviously as the state of tune rises then a VFPR would be fitted to allow the injector to fuel at its full capacity??!!

[GRSmotorsport]

Richard,

The only real way of knowing is to fit an AFR gauge, this will give you an idea what to do next..

[1320autos]

Roland made his 273bhp 230ft lb with stock injectors;

"Hu Guys, we use stock injectors, at 6-7k using wide band on board AF meter with it positioned before cat under full load in 4th gear achieves between 12 & 12.5 Ratio"

We have seen over 200whp with stock injectors

[roland2003]

We did, but for additional detonation headroom and a much smoother torquier mid band we advise more fuel. The stock ones did max out (just) .The JCW 380cc makes only marginal diifference to AF ratio ,and thats only at the top end. 450's are better if your looking at later upgrades. For example cam & head....you realy do need the 450/s then.

[1320autos]

Roland,

Did you ever suffer with detonation when you were ragging around Coombe with the stock Inectors

[Lucky Dave]

Im running 450 injectors with the fuel pressure at just under 3 bar, to get the correct A/F ratio

I think Roland has just had some new stock if your still after some Rich.
Make sure you get an adjustable pressure reg and then the wideband.

[Richard Crofts]

I can see a trip/telephone call going in to autotech and gtt in the next month or 2. god between this and the ic upgrade plus gtt chassis parts i can see the limit on the amex and visa getting very close LOL

cheers for the advice guys.

>>>>>> heads off down the road to chat to dave about guages and to look at his gtt stuff

[Aberdeen Al]

My GTT cam, timing sprocket & 450cc injectors arrived yesterday...................perhaps I should have purchased the AFPR thingy at the same time.............................looks like another call to Roland on Monday !