ITBs?

[Zmatt]

http://www.extrudabody.biz/servlet/the- ... Kit/Detail

I just saw this today after some bored searching. Anyone ever tried this kit before? what are your thoughts?

[BEEK]

those are the itb's ive seen, if i get the nerve i might get those and try a megasquirt, im so unsure of my maping ability, thats the reason im shying away from it

[mdrburchette]

Redline has a similar setup. Jeff Scheferman has/had the system on his 72 Coupe.

[Zmatt]

Could you link to the redline kit? I think it's an interesting path. Wouldn't be as powerful as forced induction, but if you want EFI and want the response and sound of the carb then it seems like a good choice. ITBs sound and feel great.

[Daniel]

All things being equal ITBs and Carbs will be the same power Turbo or supercharging would provide
far more power if done correctly . The advantages of ITBs and EFI is tuning on the spot without changing
and buying a collection of jets . Redline's ITBs are Webers btw a good choice imo .

[wmausbach]

Daniel,
ITB's are not magic , why do you think they can outperform a Turbo. Fiat didn't when they ran their rally cars. They went to supercharging and then Turbo after going the ITB route.
Ciao
Wayne

[Zmatt]

I think you misread his post. He said carb power =itb and turbo\sc > then both.

[Zmatt]

So I found the redline weber site. Aside from most fo the site being broken and looking like it's form 1998, I couldn't find a fiat specific kit. So I guess you would have to build you own using their carbs?

[mdrburchette]

What a terrible website! maybe try calling them to see what they have to offer.

[Zmatt]

yeah, there isn't much to see there. I just had a thought. That ITB kit I posted wants you to use an aftermarket carb manifold, makes sense but those aren't drilled for MPI, so where do the injectors go? do you have to do that yourself?

[manoa matt]

The injectors are in the throttle bores of the ITB's. The ITB"S bolt onto an intake manifold designed for dual carbs. Pierce manifolds has the manifold for around $260.

[Zmatt]

so it isn't MPI, it's TBI? Well that makes it little more than an electronically controlled carb. Aren't the factory FI 124's port injected?

[Daniel]

you could buy a manifold from Pierce or just find a used IDF Fiat Manifold which is better then the
PBS Produced Intake Manifold that they would sell you . The ports have a 90 degree bend in them
which if you compare side by side you'll notice smoother curve on the Factory Fiat unit .

Last time i called redline they didn't even have someone to answer the phone it was some sort
of answering service .
You could use the Fiat FI manifold with a Mega Squirt to control and manege everything
that would save you about 1400 bucks on ITBs cost alone .

[fiatfactory]

.

[Daniel]

Daniel, that's part of the reason why ITB's will always be more powerful than carbs... not the same... as a throttle body doesn't require fitment of a venturi (primary or secondary) to speed the airflow and issue the fuel from which a carburettor requires to function... these are again obstructions to the flow path that are simply not there on a throttle body, hence they will flow more air for the same body size and make more power, no ifs or buts.

Yes i am completely aware of this that is why i said all things being equal ! if you try to using large venturies you lose a lot
of drivability do to the low vacuum that is needed to make the Jet circuits work well within the venturie area but thanks .
I've built race Fiat engines in a number of different configurations most of them have been carbs, first set were Mikuni
side drafts then Delortos and last but not least Webers . After realizing how hard it was to come by jets for the first 2 sets
of carbs i went for the Webers lesson learned .

I like your Intake Valve weight reduction it's a nice mod i may copy that on the next engine i build .