Mi 16 Power Upgrade

[flyfisher 6 2 Cars]

Looking for a power upgrade for my 1905 alloy block mi16 in my cti would it be better to go with Webber 45s or a set of jenvey s itbs know the Webber route is the cheaper but in the long term is it the best

[dcc 855]

Nothing cheap about webbers. Itbs all the way.

[Tom Fenton 1,541]

If you just put bodies or carbs on don't expect a massive power increase. Maybe 10-15hp. The alloy Mi is pretty good as it is. Increased compression and cams needed along with bodies or carbs to really feel a big difference.

[Tom Fenton 1,541]

Oh and also, (pedant mode on)

 

This is a Webber

 

 

This is a Lloyd-Webber

 

But THIS is a Weber (one B only)

 

[rallyeash 155]

And one of them you wouldn't let your kids near...

[jackherer 543]

Oh and also, (pedant mode on)

To be fair Weber is one of the most commonly misspelled words on car forums in my experience, second only to Dell'Orto. Or maybe carburetor/carburator/carburettor/carburetter (which is unforgivable given the four possible correct spellings.)

[Simes 248 2 Cars]

I got another 10bhp after adding Jenvey's, it also dialled out the lumpiness of the cams at idle.

It makes a terrific noise, on WOT I can be heard 2 miles away...............................

[boldy205 75]

NOTHING beats the sound od a side draught!

[Terry83 0]

Guys I'm looking at both . The throttle bodies are a lot more in the long run , than carbs and more complex to set up , however don't need the maintenance of carbs ?

 

Unless there is a massive difference in fuel consumption and power out put I'm leaning towards the carbs 40's or 45's. What are your thoughts ? Thanks

[welshpug 1,657]

its a massive difference in fuel usage, I know Sandy Brown's recent very high specification TU5 engine (230+bhp 1600) still does 40mpg, and pulls so hard from low and mid range.

[allanallen 528 2 Cars]

My brother (calvinhorse) has a lightly tuned 8v on 45s, sounds amazing, goes well but does about 10mpg however you drive it.

[Simes 248 2 Cars]

I've got jenveys and they use fuel, more so when you want it to make that noise.

 

Throttle bodies aren't any more complex than carbs. Each has there own characteristics. I'm more biased to bodies.

They aren't cheap, ecu, mapping etc.

 

What else has been done to your engine?

[Terry83 0]

Mine nothing it's in bits at the moment .

I have an alloy 1.9 mi16 that I will be doing a full rebuild on

My friend is going down the carb road and so was I ?

Iv been offered a set of body's jenvey 45's and piper cams for £600

They come with gti6 injectors and fuel rails ?

[Simes 248 2 Cars]

Snap them up.

 

You'll need an ECU and some other bits.....

 

look at my rebuild thread.

[calvinhorse 870]

My brother (calvinhorse) has a lightly tuned 8v on 45s, sounds amazing, goes well but does about 10mpg however you drive it.

It's set up to run rich/safe so does use loads of fuel.. It's well worth it tho! The sound and the spluttering make it more novel to drive.

 

After 2 years of weekend driving the carbs have never caused any reliability problems, it starts easy, ticks over nice.. I'm in no rush to change to throttle bodies

Edited January 17, 2016 by calvinhorse

[Terry83 0]

Are dhla40 carbs that will accompany the mi ?

[allanallen 528 2 Cars]

40s aren't big enough, you'll need 45s.

[Terry83 0]

But there the rite type just need bigger ones ?

[Simes 248 2 Cars]

Yes, 45mm

[allanallen 528 2 Cars]

You have to remember with carbs a 45 isn't actually a 45mm opening as they have 'chokes' in them which essentially make them smaller.

[Terry83 0]

Iv been told 40's are better bottom end power ?

[petert 586]

The number of gurus who can tune carbs is also rapidly diminishing. Definitely a dying breed. I'd suggest support for tb's and ecu's is far more common and cheaper.

[calvinhorse 870]

I wouldn't say cheaper, I had my carbs setup at Mikeanics in Congleton for £180 (4 hours labour and emulsion tubes) you can probably get a map done for that but it won't be a good one

[Terry83 0]

I agree if you can find someone who is good your away . But it's more reputation than anything else

[Terry83 0]

Will 40's be big enough for the mi ,

I know 45's will give me more top end but there very hard to come by and expensive .

Will 40's be big enough for the mi ,

I know 45's will give me more top end but there very hard to come by and expensive .