Adding Turbo to a Dual Weber IDF's ?

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THEFIAT

Adding Turbo to a Dual Weber IDF's ?

Post by THEFIAT »

Does the idea of building an airbox around twin IDF's, and using an exhaust driven Turbo to feed the air box make any sense? Anyone ever done it?

Jon
131
Posts: 672
Joined: Sun Nov 14, 2010 1:13 am
Your car is a: 1982 131 Superbrava warmed 2.0 litre.
Location: Tasmania, Australia

Re: Adding Turbo to a Dual Weber IDF's ?

Post by 131 »

THEFIAT wrote:Does the idea of building an airbox around twin IDF's, and using an exhaust driven Turbo to feed the air box make any sense? Anyone ever done it?

Jon
Yes it could be done, but it would be a pain to get right! You'd be better off selling your IDFs and putting the money towards EFI and turbo.
Mick.

'82 2litre 131, rally cams, IDFs & headers.
fiat218
Posts: 5745
Joined: Fri May 16, 2008 5:06 pm
Your car is a: 1969 124 AS spider

Re: Adding Turbo to a Dual Weber IDF's ?

Post by fiat218 »

ya sell it to me
Jim
East Grand Forks MN
1970 Fiat Spider BS1 ( FOR SALE
1969 124 AS Spider
2017 Abrath
2018 Alfa Romeo 4c Spider
stonebike

Re: Adding Turbo to a Dual Weber IDF's ?

Post by stonebike »

You will need different carburetors for a blow through turbo as you will have no vacuum once the turbo builds boost. It is widely agreed within the turbo community that blow through setups are a waste of time. They tend to produce excessive lag and have many highly rich and lean areas in the power band. A few auto makers offered these over the years, the most successful being the Maserati Bi-Turbo. And by successful, I mean it lasted long enough for it to become a joke.

If you are really interested in a turbo, you should start by investing in a properly developed electronic fuel injection that can compensate for the manifold pressure along with the normal vacuum. In other words, something more advanced then the OEM units provided by Fiat and Legend Industries.
sptcoupe
Posts: 987
Joined: Tue Mar 17, 2009 9:25 pm
Your car is a: 1972 124 Sport Coupe

Re: Adding Turbo to a Dual Weber IDF's ?

Post by sptcoupe »

There was a guy in the early 80's in Ohio who tried this. He didn't pressurize the air box, but had individual runners going from the turbo/intercooler straight into the individual bores of the IDFs. As you might imagine, it never got close to working. You can make a draw through set up work, but as stonebike says, the best money for a turbo motor is a good FI system, for sure.
THEFIAT

Re: Adding Turbo to a Dual Weber IDF's ?

Post by THEFIAT »

Thanks to all!
My real strength, is in knowing my weakness.
And on this topic, I have show my ignorance.

Let's move on to... RAM AIR.
(Meaning, efficiently designed hood scoop to raise the incoming pressure to naturally aspirated carbs.)

Talk among yourselves. I'll Listen.

JB
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