Triple carb fuel line setup

[GTLexus]

Ok I have searched the forum but haven't been able to find it.

I am putting an Offy manifold onto my 221 and was wanting to know which would be the best way to run the fuel lines.

Do I use a distribution block near the firewall to distribute the fuel to the carbies.

Or do a I run 1 fuel line next to the carbs and T them into the main line.

The outer carbies will only oopen at aroun 1/2 to 3/4 throttle.

Also will the standard fuel pump be able to deliver enough fuel or will I have to go to an electric pump?

 

[gb500]

have alook at this link :
http://www.geocities.com/hotrod_inline6/

and then specifically the pages 'making the falcon fly ' 1 and 2

good pics of the offy setup
the fuel line is tee'd into each carb.

but guess a splitter at the firewall would work- as then you have 3 separate lines to each carb.

as to wether a std pump is up to it - I would think so as they do 250 ci 2v heads (from the factory) - so would have thought the fuel flow would be similiar to a 221 with 3 x carbs.


but you dont say wether your engine is mild to wild....

but may be best to put a fuel pressure guage on and regulator and then monitor it for adequate pressure.


ps : are you in Aust? if so where did you get the offy manifold from?

brett
melb

 

[GTLexus]

Engine has extractors which are split at secondaries and run dual 2.5 inch exhaust.

Head is mild port, just cleaned up, 302 valve springs. Cam is a Tighe 594 spec

Comp will be around 9 - 9.5:1, only picked up other engine to rebuild on weekend.

I purchased the offy manifold from ebay motors from usa. Keep an eye out in fleebay section on this forum, that's how I found out it was listed, came with carbies as well.

 

[GTLexus]

oh yeah, I'm in Aus

 

[gb500]

hi - saw that you were in syd - after i posted the reply!

i just looked up the cam specs (274 deg)- is your car a manual ?


i have a 200 that i have a tighe 300 AT cam ( 260 degrees) on a 3 speed auto to put in - will go for the log head and either a holley 350 or a webber 32/36 on adapter.


later on may mess around with a 2v head and see what happens with that

Brett

 

[gb500]

its an an XP sedan i will put the 200 in

 

[GTLexus]

Thanks for the links Brett,

no the car is auto, borg warner 35. I spoke to Tighe and they told me the cam would be OK with a standard stall but a 1500 rpm stall would make it very nice. I saw your cam specs but after speaking to Tighe they recommended this one so I will go with it and see what happens

Mine is in an XP as well, had just the 221 with extractors and exhaust before and it went very well, so I am hoping for an even more fun ride now.

I will be entering a few nostalgia drags with it so we shall see how it performs