Jenvey Throttle Bodies vs bike Throttle Bodies

[ber405mi16]

Hi all, new to the site and trying to find my way
Jenvey Throttle Bodies vs bike Throttle Bodies

looking to do a mod to my Mi16 engine - add some throttle bodies But it is the same as the s16 so asking for help

which is better - bike Throttle Bodies or second hand set of Jenvey Throttle Bodies
can this be done using standard wiring loom?
if not what do i need and what do i do?

Any advice would be great or chat to people that have already done this.
thanks for reading

[lolsteve]

SRowell & Jammapic both have throttle bodied engines, neither is the same as yours but perhaps they'll have some words of wisdom for you

P.s Welcome to the site

[powerandtorque]

Bike bodies can work well or they can be terrible - the devil is in the detail.

Someone like Colin Satchell makes an excellent setup using bike bodies done properly, but a typical lashed up setup done at home with a DIY manifold and silicon joiners isn't likely to work very well.

Jenvey's work well enough and are a known quantity, but the Jenvey Mi16 "kit" is a bit of a compromise and can be improved up - the manifold in particular isn't really ideal and considerable gains can be made with a properly designed one, again from the likes of Colin Satchell.

You can't use the original ECU and whilst you could heavily modify the loom, you'd be much better off starting with a scratch built loom or at least a more suited donor loom. ECU wise you'll need something aftermarket like DTA, Emerald or Omex.

That's the problem with ITB's - it tends to work out quite expensive to do once you've got the 'bodies, ECU, all the extra bits (which quickly add up) and paid to have it mapped. You won't have change from £1500, put it that way, and depending how much you can do yourself it might well be a fair bit over and above that.

That said, Mi16's on ITB's are truly wonderful things. Bwaaaaaarrrp!

[welshpug]

the manifold is one of the most important parts whichever type you go for, Satchell engineering can do you a really good one for Jenveys, they don't tend to do the bike body one any more as it costs q lot more to do them, though overall costs factoring in a set of used bike bodies is very similar in the end.

[jammapic]

I had a mini with bike bodies on it back in the day, it was great... but my knowledge of setting carbs up back then was pretty sketchy so it never ran right!

Love my GTi6 on Jenveys though.... honk honk:

[welshpug]

I had a mini with bike bodies on it back in the day, it was great... but my knowledge of setting carbs up back then was pretty sketchy so it never ran right!

does not compute....

[lolsteve]

Might not need a aftermarket ecu, ^jamma ran his itbs on the stock gti6 ecu which was mapped to suit and I contacted a rover remapping company awhile back asking ITBs and the MEMS who replied that it was easily done on the stock ecu. Think the lotus with the VPHD head had ITBs

[welshpug]

he's in ireland so will probably be cheaper to get an S40 or similar.

[powerandtorque]

Might not need a aftermarket ecu, ^jamma ran his itbs on the stock gti6 ecu which was mapped to suit and I contacted a rover remapping company awhile back asking ITBs and the MEMS who replied that it was easily done on the stock ecu. Think the lotus with the VPHD head had ITBs

Whilst you can adapt some types of standard management to work with ITB's, you won't on a 1.9 Mi16 (either Motronic ML4.1 or M1.3 depending on age) as it's a fairly primitive setup using an AFM and simple on-off throttle switch which won't work with ITB's.

Other problem with remapping standard management is finding someone to do it - it's easy finding someone to map aftermarket stuff (although finding someone good to map it is another matter entirely)

[lolsteve]

Ah suppose a much older ecu wouldn't work well

[powerandtorque]

It's not so much the age of the ECU but the configuration of sensors etc.

Motronic MP3.1 for example is about the same age as M1.3 and found on some early 90's PSA and Fiat models, but being MAP sensor based and using a proper potentiometer based TPS it could be adapted to run ITB's - although from what I remember from Wayne @ Chipwizards saying it doesn't work as well as some of the Magnetti Marelli ECU's (like GTi-6) for that purpose.

[ber405mi16]

ok thanks guys - good info
sounds like i'm best getting an aftermarket ECU.....

[Eeyore]

yeh. Either get bike ones and build them up yourself or get the jenvey kit ready to bolt on. To do it properly you will need an aftermarket ecu. Basically factor in everything and its easily the best part of £2000.