Printable Version | Subscribe | Add to Favourites
New Topic New Poll New Reply
Author: Subject: First install of twin 40s
Apollo1600

posted on 5/9/12 at 07:44 PM Reply With Quote
First install of twin 40s

Hi there,
Bolted the twin 40s on my modified 1600 pinto for the it time tody. The car started fine but was inning very rough lots of spitting back through the carbs and the engine was shaking quite a bit. Is there a wayno balance the carbs when the carbs are off the engine?
Cheers

View User's Profile View All Posts By User U2U Member
britishtrident

posted on 5/9/12 at 07:56 PM Reply With Quote
No but it is dead easy to balance with nothing more than a rubber tub used as a stethoscope ---- must be held in the same relative position to the mouth of each bell-mouth.





[I] “ What use our work, Bennet, if we cannot care for those we love? .”
― From BBC TV/Amazon's Ripper Street.
[/I]

View User's Profile View All Posts By User U2U Member
mark chandler

posted on 5/9/12 at 08:02 PM Reply With Quote
Also you do not bolt up tightly or the fuel froths in the carbs, you tighten against the rubber O rings until the thackery washers are closed, not until you can tighten no more.

Regards Mark

View User's Profile View All Posts By User U2U Member
mookaloid

posted on 5/9/12 at 08:21 PM Reply With Quote
The timing could be off too - have a play with the dizzy to see if the idle improves





"That thing you're thinking - it wont be that."


View User's Profile E-Mail User View All Posts By User U2U Member
splitrivet

posted on 5/9/12 at 10:13 PM Reply With Quote
Are you using low pressure fuel pump or have you got a pressure reducer.
Cheers,
Bob





I used to be a Werewolf but I'm alright nowwoooooooooooooo

View User's Profile Visit User's Homepage View All Posts By User U2U Member
Apollo1600

posted on 5/9/12 at 10:25 PM Reply With Quote
Hi there,
Thanks for the advice im using the standard pinto pump.
Cheers

View User's Profile View All Posts By User U2U Member
deezee

posted on 6/9/12 at 09:34 AM Reply With Quote
Have you set the idle mixture properly? Are you tuning with an AFR, or guessing? What engine are the carburettors tuned for?






View User's Profile View All Posts By User U2U Member
Apollo1600

posted on 6/9/12 at 09:51 AM Reply With Quote
Its a 95bhp modified 1600. I got the jet sizes from dave andrews page. I set the mixture screws 1 and a quarter turns out and had a bit of a play. I think it could be timing all though the timing was fine with the 32/36 I guess it changes from carb to carb.
View User's Profile View All Posts By User U2U Member
v8james

posted on 6/9/12 at 10:46 AM Reply With Quote
Standard pinto fuel pump will flood the carbs, did with mine anyway.
I had to fit a pressure reducer.

View User's Profile View All Posts By User U2U Member
coozer

posted on 6/9/12 at 11:31 AM Reply With Quote
Get some bikes carbs.. saves all the agro over the years.





1972 V8 Jago

1980 Z750

View User's Profile Visit User's Homepage View All Posts By User U2U Member
caber

posted on 6/9/12 at 04:03 PM Reply With Quote
I have the same set up and am having huge problems finding someone who can jet them properly. I have an electric pump and pressure reducer, I also have a spare pressure reducer that I would be happy to sell you if you want!

Please let me know how you get on and what jetting and venturis you end up with. I will let you knoe=w wnat I have onec i find the bit of paper where it is written!

Caber

View User's Profile E-Mail User View All Posts By User U2U Member

New Topic New Poll New Reply


go to top






Website design and SEO by Studio Montage

All content © 2001-16 LocostBuilders. Reproduction prohibited
Opinions expressed in public posts are those of the author and do not necessarily represent
the views of other users or any member of the LocostBuilders team.
Running XMB 1.8 Partagium [© 2002 XMB Group] on Apache under CentOS Linux
Founded, built and operated by ChrisW.