Would a Chev Manifold fit a RV8?

Ian Anderson · Post by **Ian Anderson** » Sat Jan 20, 2007 5:42 pm

As per title

I have seen a Chev manifold with a set of 4 Webber IDF's that would be great for the GT40

Can that manifold fit a 3.9 RV8?

If not anyone got a Chevvy and want some Bling carbs?

Ian

Lewis · Post by **Lewis** » Sat Jan 20, 2007 5:52 pm

I can't help you on that one - but you could always get a quad inlet fannymold for the RV8 and transfer the carbs across, then sell any Chev specific bits? Maybe something worth considering

Eliot · Post by **Eliot** » Sat Jan 20, 2007 6:05 pm

Take a browse through my growing rover v8 manifold archive for some ideas:
http://www.mez.co.uk/ms12.html

Lewis · Post by **Lewis** » Sat Jan 20, 2007 6:14 pm

Ey Eliot, sorry to go off-topic for one sec, just wanted to see if you'd checked the last page on the "Twin plenum" thread - posted up a pic of the "trouser" manifold.

I can send you a copy without the logo in the corner if you like for your library

Post by **katanaman** » Sat Jan 20, 2007 6:18 pm

manifold wont fit and the carbs might be a touch too big for your engine but I don't know what size IDF's they are. Apart from that you think you have problems just now with your efi wait till you try and tune quad carbs.

kev_the_mole · Post by **kev_the_mole** » Sat Jan 20, 2007 8:10 pm

Ian,

was this the one you were looking at ?

Pete Farmer has a 3.5 RV8 Healey which had 4 x 48 IDA's (below) which gave him so much trouble that he went back to a 4-barrel

Cheers

Ian

Ian Anderson · Post by **Ian Anderson** » Sat Jan 20, 2007 9:17 pm

Ian

This is what I saw
http://cgi.ebay.com/ebaymotors/IDF-48-W ... dZViewItem

I accept there is a set up routine with these but certainly are a bit more period correct on a GT40 than EFi

Ian

ian.stewart · Post by **ian.stewart** » Sat Jan 20, 2007 9:34 pm

I have seen RV8 webber set ups going for less than £600 recently, I would cost a fortune to set up 48s for a RV8, they are too big for general road use, even for a 5 litre it would be a bit big, and probably need 7k rev limit to get the best from them, I have 42mm Jenvies on my 3.9 Cortina which in reality are posibly a bit on the large size for TBs
Lack of air speed over bleed holes would give you no end of problems getting the engine to run at low speeds with 48s,and to get the air speed up, to run the carbs you probably need a tickover of 2k+ to get any sort of throttle response.
Ian

pitsnow · Post by **pitsnow** » Sun Jan 21, 2007 9:54 am

I have a set of 44IDF on a 4.6 engine.
They are working fine without the progression problems a lot of people encounter with the downdraughts.
The key is to have the right size carburettor (as always) with the right parts inside.
It took a bid of asking around and testing but as I said, mine are working.
I ended with: F7 emulsion tubes, 140 main, 180 air and 0.60 idle.
That will be different for any other engine.
The main point was the change to the F7 emulsion tubes that has given the better progression for my engine.

As a lot of people said to me, why not go EFI with throttle bodies?
It will take away all the mess with the jets and most of the set-up.

Ian Anderson · Post by **Ian Anderson** » Sun Jan 21, 2007 11:58 am

Pitsnow

That looks really good! and the correct effect for the GT40

So the 48 will be a bit big - oh well with the USD rate at the moment they looked like a bargain!

cheers

Ian

pitsnow · Post by **pitsnow** » Sun Jan 21, 2007 12:32 pm

If you want carbs, why not have a stab at those:
http://cgi.ebay.co.uk/ws/eBayISAPI.dll? ... &rd=1&rd=1
You can get the manifold seperate.

JSF55 · Post by **JSF55** » Sun Jan 21, 2007 1:23 pm

Those split manifolda are still available i believe, the proper cast manifolds were made by janspeed and it was believed there was only 6 cast, the last count accounted for 5 of them, so there's another out there somewhere, most people found them very difficult to set up and to big for the rover at 48, 45's would have just about be acceptable, my mate has a set and although he enjoys the performance of them, the 12 to the gallon on a run was unaccepltable !! john

ian.stewart · Post by **ian.stewart** » Sun Jan 21, 2007 2:12 pm

Mangolesti certainly made RV8 Rover manifolds, and are still listed on some sites I have looked at today.

Wotland · Post by **Wotland** » Sun Jan 21, 2007 2:22 pm

Aviaible here :

http://www.piercemanifolds.com/Images/Catalog/K154.htm
http://www.piercemanifolds.com/mangoletsi.htm

Cheer