Calling on Curly

[mdrburchette]

What size engine is in your Coupe and what size DCOEs and chokes are you running? I'm building an 1800 for my Vintage racer and I'm looking for a carb setup.

[Curly]

Carbs are 45 DCOE and I'm running 35mm chokes. Engine is only 1592cc

[mdrburchette]

Thanks Curly. I've been inquiring about the DCOEs and there were comments the 45's would be too much for a 1756 but if you're happy with them on a 1592 I think I'll be good. I've been offered an offset manifold like yours but I don't know how that would fit in a 72 Spider. Would you have preferred a straight manifold or did you have problems with fitment of the second carb? I will be removing the booster and moving the m/c under the dash.

[Curly]

Thanks Curly. I've been inquiring about the DCOEs and there were comments the 45's would be too much for a 1756 but if you're happy with them on a 1592 I think I'll be good. I've been offered an offset manifold like yours but I don't know how that would fit in a 72 Spider. Would you have preferred a straight manifold or did you have problems with fitment of the second carb? I will be removing the booster and moving the m/c under the dash.

A straight manifold would be preferable for both performance and ease of fitting, but the only ones available commercially are offset slightly to enable the use of a block mounted distributor.
45 DCOE carbs are a bit on the large side for my 1592, but because it spends most of its time over 5000rpm they are fine.
SPYDUH has a similar setup using 40 DCOEs and it's a Euro/Aus spec 2-litre engine, but nowhere near as modified, nor does it rev as highly as the 1592.
For your 1800 the 45s would be my choice especially if you've had head work done and are running a good set of cams.
This is SPYDUH's setup.

[mdrburchette]

These will be going on a HC race ready engine. Thanks for the info Curly. I'll start looking for a set.

[engineerted]

I think you need to check the rule book first. You can not change from down draft to side draft carbs, at least in F-production. I know you are talking about running vintage class but they seem to have more rules.

Ted

[mdrburchette]

Hey Ted! I was concerned about the same thing when Guy suggested using the DCOEs. I checked the rulebook and it only says dual Webers so I called the tech guy and he said there was nothing to stop me from using them. I know Jim Scurria is restricted with 40 IDFs and 28 mm chokes in SCCA.

[engineerted]

The SCCA states that you can use alt carbs, but the adaptor can not change the orientation of the carb, ie. down draft to side draft. Alot of vintage racing associations follow the SCCA rule book but have supplements to offset issues like this. I would have to refer to JIm on this one. Good luck on your build, I would love to run side drafts also!!

Ted

[Tappy]

maybey this can be a setup for one of you ? not mine just pointing

http://cgi.ebay.com/ebaymotors/BMW-E10- ... ccessories



WEBER DCOE 48

and a straight manifold :

http://cgi.ebay.com/ebaymotors/Fiat-Spi ... ccessories

[engineerted]

I did some checking for myself, things are slow here at work right now. VARA - no DCOE if not originally equipped, SVRA - induction system must be provided by the manufacturer. I don't think Fiat produced cars with DCOEs equipped from the factory. What vintage group are you going to run in? I am just looking out for ya. You can allways swap them for the gold idfs you have.

[mdrburchette]

Ted, I'm glad you're looking out for me. I've been wary of the use of the DCOEs and haven't taken the plunge to buy a setup yet because of it. I guess, with the 1756, I'd fall into the DP catagory:
http://www.svra.com/SVRA/SVRAHome.nsf/a ... penElement

Notice it denotes using dual Webers but does not specify what kind. Now, here is the supplemental regulations. Check the SVRA approved options section:
http://www.svra.com/SVRA/SVRAHome.nsf/a ... penElement

Now, what confused me was under the DP catagory, it specifies using dual webers but in the approved options it says dual IDFs or DCOEs (bump a class). So, I called the tech guy and he said the way he read it, I would not be bumped a class since it was noted for DP. I think I'll call him again because I know FIats are already outclassed and I sure don't want to have to run in the back!

[engineerted]

??? WHAT ??? Jim are you out there? This makes no sense. What about dellorto carbs? Also it looks like you can run any size chokes and i/e valves. F-prod is limmited to stock size. What are you going to do with all that power!!! THATS IT! pulling those flare off and run vintage!!

Ted

[mdrburchette]

LOL! That's exactly how Jim reacted when I showed him! Another thing I noticed was the revised date on the page showing the classes is 2/2008 and the date on the supplement is 12/2004 so it looks to me like the part in the supplement saying it would bump me a class would be mute, especially since it specifies dual webers in the DP and EP classes.
There is another thing that is different from the SCCA rules. I can run a removeable tonneau cover over the cockpit, which will help reduce drag.