Feeding webers on a 3.2 flat 6

911hillclimber · Post by **911hillclimber** » Mon Mar 09, 2009 6:17 pm

I am about to get the parts to supply fuel to a set of 40 size webers on my racer.

Anyone with experience of pump rates (and type), filters and pressure/regulator to use please?

The car will spend most of its track time at full throttle if I'm brave enough.

Graham.

MikeB · Post by **MikeB** » Mon Mar 09, 2009 8:06 pm

A "Red Top" interupter pump kit (Ref 480532K) and a Filter King regulator with pressure gauge(FPR007/G)) from Demon Tweeks should be more than man enough

PMO recommend a pressure of between 3 & 5 psi for their cars, so I suspect the Webers would be similar.

I assume you're not going hillclimbing if your going to be at full throttle all the time

Alan @ CanfordClassics · Mon Mar 09, 2009 8:09 pm

I like that picture....

Alan

Lightweight_911 · Post by **Lightweight_911** » Mon Mar 09, 2009 8:38 pm

I have a 2.5 litre twin-plug equipped with 40 IDA Webers - I use a pair of Facet red-top pumps running in series with the pressure regulated via an 85mm Malpassi Filter King regulator.

Alan @ CanfordClassics · Mon Mar 09, 2009 8:46 pm

Oh, and in case it helps on my SS 3.2 with 46 PMOs I am using the original bosch fuel pump (I can't remember what regulator I used

)

HTH

Alan

sladey · Post by **sladey** » Mon Mar 09, 2009 9:45 pm

I realise this won't be much help at all but:-

a) phwoarrr!
and

b) can I have that when you've finished with it please. It looks sooo

sladey · Post by **sladey** » Mon Mar 09, 2009 9:46 pm

What body is going on that car?

911hillclimber · Post by **911hillclimber** » Mon Mar 09, 2009 10:01 pm

Thanks for the kind words and the tech stuff too.

My plan was to use a red top with the circuit running as fuel flow:

Tank to pump to filter to regulator to 'T' piece and each leg of the T to each Weber to try to get equal flow/pressure to each carb.

The engine is a simple 3.2, almost stock, so I think one red top will be enough flow using 8mm ID pipes throughout.

The car will only be used for hillclimbs, and i did say full throttle if I was brave enough.

Here's the body, but it has had 2 Skoda bodies and a Karmann Ghia body on there in it's colourful past...:

targa boy · Post by **targa boy** » Mon Mar 09, 2009 10:25 pm

What sort/make of CV joints are you running with those extreme drive shaft angles?

charlieboy · Post by **charlieboy** » Mon Mar 09, 2009 10:35 pm

Where did you get the Flatfan conversion from? Was it one you had made or did you find a place that does a kit, I've seen them talked about and seen links to sites where they are still in the 'development' stage but never seem to have got anywhere or they just cost lots and lots of ££££££££££££££

Looks very

STEVE

911hillclimber · Post by **911hillclimber** » Mon Mar 09, 2009 10:37 pm

They are motorsport deep plunge on the gear box and fixed position Cv at the hubs. The rear end in March F2 spec.

I am worried about the angle as it looks awful; they are horizontal at ride height, but almost max angle fore/aft.

If I need to I can move the drive train back 40mm which reduces the angle a lot.
I have seem many FWD cars with such angles, but thet do look uncomfortable.

22 degrees is the max shaft angle allowed, and I'm not far off that.

There will be huge strain when the clutch is dropped with 12'' wide on 14'' rims and AVON hillclimb slicks (not the ones in the pics, they are old cut wets). Hope it all stays together or it will pop the CV inners off the shafts.

The box has a lightly set LSD.

The flat fan was made about 10 years ago by Nick Spears and Crispin Manners. It came with the fan on the engine. a real factory one will cost £16K I'm told.......:

fourteener · Post by **fourteener** » Tue Mar 10, 2009 8:06 am

Graham, do you have any pictures of the linkage? I'm interested how it operates as this is mid-engined and everything's front to back?

911hillclimber · Post by **911hillclimber** » Tue Mar 10, 2009 12:56 pm

If you mean the cross bar to each carb then it is the stock weber parts on simple brackets. I have then, just not fitted yet.

This is done because of the flat fan being in the way of the stock configuration.

Thet will be done in the next 2 weeks.

Gary71 · Post by **Gary71** » Tue Mar 10, 2009 2:01 pm

I think he meant the gearlinkage:

911hillclimber · Post by **911hillclimber** » Tue Mar 10, 2009 5:04 pm

Ahhhhh!

Been Friday 13th early this week (and last)

The gearchange is for righthand gear changes (because it is a RHD race car).
The linkage was done by Crispin Manners years ago and is very very solid and posative.
If you wish I can take a few pic close-up.

DDK - Die Deutschen Klassiker

Feeding webers on a 3.2 flat 6

Feeding webers on a 3.2 flat 6

Re: Feeding webers on a 3.2 flat 6