12 replies to this topic

[cradley-heathen]

i was wondering if anyone on here has fitted one of specialist components engine management kits to their a series? im refering to their own billet throttle body, and injection system, its around the £950 mark i believe.

im curious as to what improvement anyone has experienced with a really good setup on an a series over carbs and dizzy. im sure it must be a ton better than rovers injection systems, mainly down to it being a real bespoke item.

anyones input on this greatly appreciated!

[Sam Walters]

im sure it must be a ton better than rovers injection systems, mainly down to it being a real bespoke item.

With a wet manifold setup as per the SC setup charge sits in the port. Then most of that charge is sucked to the inner two cylinders as those inlet valves open first.

personally for fuel distribustion i think its worse then a carb. Just because youre firing shots of fuel as opposed to constant atomisation of the mixture.

Bonus is its easier to setup then a carb, but it in no way rivals the MPI setup. No matter what SC say.

They make some dammed good products. But this is a product that just doesnt solve the issue.

Now, sc could no doubt make some direct to head throtle bodies using the two injector setup they have now. Providing the ecu is modified to suit.

[Shifty]

Chap here is fitting one.

http://www.theminifo...__fromsearch__1

[danny79]

you could also have a look at the camems route.
their system seems to have addressed issue with Siamese injection. uses 2 lambda sensors i think
the cost roughly the same as the SC kit.

i'm very interesting in injecting a mini but am thorn between the two kits.
still haven't decided which is better or worse and why.

but to be honest if funds would stretch i would get SC to build me a bmw head a-series engine and run injection in a mini that way

[Wil_h]

im sure it must be a ton better than rovers injection systems, mainly down to it being a real bespoke item.

With a wet manifold setup as per the SC setup charge sits in the port. Then most of that charge is sucked to the inner two cylinders as those inlet valves open first.

personally for fuel distribustion i think its worse then a carb. Just because youre firing shots of fuel as opposed to constant atomisation of the mixture.

Bonus is its easier to setup then a carb, but it in no way rivals the MPI setup. No matter what SC say.

They make some dammed good products. But this is a product that just doesnt solve the issue.

Now, sc could no doubt make some direct to head throtle bodies using the two injector setup they have now. Providing the ecu is modified to suit.

I think you need to be clear in what you are saying. The SC kit is in no way like the MPi system, and SC don't claim that it is or that is is better. It is not designed to solve the siamese port issue, and there is no clam that it does.

It is a wet manifold system that is no better at fuel distribution (between cylindres) than a carb, but no worse either. It has the advantage of being more tuneable though.

The TB is nicely designed to ensure that the fuel distribution is a good as it can be within the limitations of a siamese wet manifold system.

I would use this system over a carb any day (and do most days).

I'm not trying to justify it just because I bought one. But I understood what the limitations were and decided that it would suit my application.

there were some early single TB systems that just didn't work, but these do.

[JonnyBMX]

i have the SC ECU and it runs well with my car, yet to have it remapped (athough i did go there and have them get it to work with my car) turned out i had a non standard cam lol! once i replace my head i shall report how the ECU copes and what BHP i have

[Sam Walters]

I think you need to be clear in what you are saying.

I don’t think i could have been clearer?
I do remember SC saying readings from thermo couples on the inner and outer cylinder exhaust primary’s would give an indication as to the fueling. They said as they were close and they believed this to be indication of a near equal fuel ratio balance between the inner and outer cylinders. That’s a claim surely?

Until they run an engine up on the dyno with a pair of wideband ill fail to believe that. Pull a head with this setup on and you’ll understand what I mean. Look at the inner and outer combustion chambers, the outers will be lighter in colour.

Through design a carb will be better at atomisation then an injector. However practically there isn’t much in it for our applications. Big power v8`s on the otherhand….

[Wil_h]

What they actuall said was that the EGTs were the same as the same engine running a carb. Initally it was claimed that this meant equal fuelling, but that was retracted.

I have pulled my head with this setup. And the outers were lighter, but no more than I have seen with a carb. this was on a 120bhp 998 turbo, and a turbo is likely to have worse port robbing.

I agree it's not a perfect system, but it is no worse than a carb, and in most respects, it's a lot better. I know a lot of people want convincing with a twin wideband setup. But most people who will use this system are not after the perfect setup, and why install it when you can't change it? and as such it's unlikely that anyone will do it.

Basically if you want proper injection on a mini you need 7 or 8 ports. Sequential injection works, but it has its limitations.

[cradley-heathen]

interesting comments guys. i know my brother had considered this conversion at one point, and i do liek the idea of it, i was just trying to justify the money.

i would agree though that a 7 port, again from SC is the better way to go, and the way i would ultimately like to go. when i have built my pot up a bit ill manage it!

[danny79]

is it possible to fit a 7 port to a small bore engine

[Tupers]

In a word yes.

[danny79]

is it possible to fit a 7 port to a small bore engine

ok let me rephrase the question.. is there any gain or benefit to fitting a 7 port to a small bore 998 engine.

[Tupers]

Yes there will almost always be a gain in fitting a cross flow head instead of a standard style 5 port item as the cross flow allows for far more efficient movement of air through the engine.