240ci/300ci Question

[smclaren]

Hi Guys

Quick question. Was there ever a factory 2 barrel carb spec for the 240/300 engine. Someone told me the other day that some Canadian trucks had a 2 barrel option on 240/300 from new. Is this right ?

If yes, what's the story with the intake manifold ? My intake supports the 1 barrel only, and I would LOVE to get that 2 barrel option if it exists.

Thanks

Steve

[jzjames]

Ive never heard of any 2 bbl option from the factory. Either make an adapter for the single bbl intake for a 2 bbl carb, or get an Offenhauser or Clifford intake which is set up for 4 bbl carbs, and an adapter can by put on those which would mount a 2 bbl.

[j41385]

I run a 4v carb on my Offenhouser C series intake. The Offy C lets you choose 2 or 4v, but the offy dp is 4V only. Clifford makes intakes so you can pick a 2 or 4v. Also they have Single 4v intakes, dual 4v intakes, tripple duece, and tripple webber side draught.

[jzjames]

Uh huh. The inline six intakes expert was lurking on here. Hey while youre here, do you have a good source for those Offy-C"s?

[j41385]

I got mine from JC Whitney. Seemed pretty fair priced.

http://www.jcwhitney.com/autoparts/Item ... 8610735552

$264.99 from JC whitney, whereas www.offyparts.com wants $358.49.

[smclaren]

Jamie,
Do the Offenhauser C-series bolt up to the stock exhaust manifold, or do you need to run headers ?

Running headers would make most sense to get the performance benefit, but I am thinking a step at a time here.

Thanks
Steve

[spartman]

The offy c-series will bolt up to the factory log, the efi 2 pc and headers.

I think the only headers they may have any issue with are the clifford headers.

[theogre5150]

I have an adapter for a 2bbl carb to a 1bbl intake. I bought it this year but I have now upgraded my setup and don't need it.

[spartman]

One thing I forgot to add is that on my offy c I made an adapter to run GM 2 bbl TBI setup on it.

So far I have gotten it to idle and rev pretty good.

I cant give any info on drive ability since I need a new driveshaft.

[j41385]

Gosh, What a mess spartman!

[spartman]

Its still in prototype stage so

[7DF250]

Here's another shot of the Offy manifold with the HD Exhaust Log.

[nevrenufhp]

Gosh, What a mess spartman!

Time for some paint too!

[willowbilly3]

Hey spart, I think that is a great idea, probably the most bullit proof efi ever. Did you get it into closed loop yet?


I also think it is useless to put a 2 bbl adapter on a stock manifold, if you do have a machinist hog it out down the throat maybe.

So, Jamie, is the C better than the DP for a common street truck? I have a DP and a dual Clifford, no plans for the clifford as yet.
Waiting on that cross flow head.

[spartman]

No real exhaust on it yet so no closed loop mode yet.

If all goes well this fall, I will have my garage back and then put the bump in there and get some of this sheet working like its supposed to.