Craigorypeck
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| posted on 6/1/11 at 12:38 PM |
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quote:
Originally posted by lotusmadandy
To check the seal all you need do is push the slides up to the top
and let them fall back down.
You should feel resistance on the way up and hear the air being forced out,
then they should fall slowly back to the start position.
They should all be exactly the same.
The fact that they dont move with the engine running,tells me that they
are not sealed.
Bike carbs are better than dcoe's in my experience.
(just my opinion though,you must understand )
Andy
They prob are better!!
Anyhow! When rebuilding the carbs I was sure they were sealed as they had a slight resistance when pushed up and didn't snap shut instantly and
had a slight whistling sound, one however had no resistance, no whistle. and snapped shut quickly. I re-fitted the incorrectly installed diaphram on
that one and they all have the same feel now.
Hmmm..
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Craigorypeck
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| posted on 6/1/11 at 11:48 PM |
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sealed all the edges with grease and they seem to be working better now...!
Thanks lads!
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jacko
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| posted on 8/1/11 at 05:01 PM |
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Do you have any photo of your car / engine what mods have you done to run the engine on carbs
Thanks Jacko
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Craigorypeck
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| posted on 8/1/11 at 07:29 PM |
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quote:
Originally posted by jacko
Do you have any photo of your car / engine what mods have you done to run the engine on carbs
Thanks Jacko
Hi Jacko.
Ported head
Fast road N/A newman cams, kent springs, hydraulic lifters (8000 rpm redline)
High comp accralite pistons ( a bit machined off as CR was high now running 11:1)
Ashley exhaust
3D megajolt
Innovate AFR
Vernier pulleys
Redtop pump and filter king
Mated to type 9
Whats the right way to cold start?
DHLA/DCOE needed 4 dabs on pump jets to prime.
As the BCs have no pump jets whats the right procedure?
I seem to be ages on crank before it fires up.
Thanks
[Edited on 8/1/11 by Craigorypeck]
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Craigorypeck
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| posted on 8/1/11 at 08:15 PM |
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Had a look at the carbs and it would look like the throttle needs to be shut so the fuel is drawn in through the choke??
As my car is only out at the weekend the chambers and runners will be completely dry so needs quite a bit of cranking to wet the cylinders via the
smaller suited to motorbike choke feed.... so
Has anyone done away with the manual choke, tapped 4 jets into the runners, piped up to a switchable valve fed via the fuel pump supply. So before
cold start, cabin switch on 5 secs before crank to prime, left on for a min to stop stalling???
Just a thought...
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jacko
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| posted on 8/1/11 at 08:48 PM |
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Hi Mate if i was you remove the fuel pump and regulator you have and fit a big bike ie zx9r pump if you do a search you will find a lot of ppl have
problems with the set up you have,
I only use my car on weekends not all of them and all i do is turn the ignition on [ fuel pump ] then pull the choke start the engine choke off
That's why you want a electric ticker bike pump
Jacko
Ps your car / engine look very very nice
[Edited on 8/1/11 by jacko]
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Craigorypeck
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| posted on 8/1/11 at 08:58 PM |
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Thanks
I had considered the matching pump. Prob still will.
When the choke is out is the fuel allowed into the runners before starter is engaged???
Or does crank suction draw the fuel in??
[Edited on 8/1/11 by Craigorypeck]
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jacko
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| posted on 8/1/11 at 09:37 PM |
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quote:
Originally posted by Craigorypeck
Thanks
I had considered the matching pump. Prob still will.
When the choke is out is the fuel allowed into the runners before starter is engaged???
Or does crank suction draw the fuel in??
[Edited on 8/1/11 by Craigorypeck]
Bike carbs are modern SU carbs [ suction units ] so working on that it is the cranking vacuum that sucks the fuel though
or so i am make to believe
Webbers have a pump that just shoves fuel in whether they need it or not thats why they have to be set up spot on
Bike carbs only use the fuel the engine needs
I bet you know that all ready
Jacko
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Craigorypeck
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| posted on 8/1/11 at 11:41 PM |
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quote:
Originally posted by jacko
quote:
Originally posted by Craigorypeck
Thanks
I had considered the matching pump. Prob still will.
When the choke is out is the fuel allowed into the runners before starter is engaged???
Or does crank suction draw the fuel in??
[Edited on 8/1/11 by Craigorypeck]
Bike carbs are modern SU carbs [ suction units ] so working on that it is the cranking vacuum that sucks the fuel though
or so i am make to believe
Webbers have a pump that just shoves fuel in whether they need it or not thats why they have to be set up spot on
Bike carbs only use the fuel the engine needs
I bet you know that all ready
Jacko
Indeed! tHats why I've put these on my 16v, I bet I can get near double the power on WOT, BUT on cruise get the same MPG I got from my 2.0 pinto
on twin 40s... maybe more?
I had my pinto perfected for cold start.... After 7 weeks in the garage and never touched- 4 1/2 pumps on the throttle after the bowls were primed and
it fired first go- made me smile. Just looking the same ideal from me BCs.
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DIY Si
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| posted on 9/1/11 at 11:05 AM |
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As said, bike carbs don't need the throttle pumping thing since it won't do anything anyway. Some of them have a built in wax stat on them
that controls the choke, and some have a throttle slide that connects all four together to move the chokes in unison. I'm not sure which yours
should have, but it'll probably be one or the other. Once it's connected right, it should just be a case of pulling the choke cable out,
if you have one, and away you go. I could start my blackbird Indy as low as -5C with just a bit of choke and turning the key.
“Let your plans be dark and as impenetratable as night, and when you move, fall like a thunderbolt.”
Sun Tzu, The Art of War
My new blog: http://spritecave.blogspot.co.uk/
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Craigorypeck
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| posted on 9/1/11 at 06:28 PM |
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Whats the issue with using a red top and filter king??
surely it would be ideal set at 2.5 - 3 PSI
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lotusmadandy
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| posted on 9/1/11 at 07:42 PM |
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Bike carbs only require around 1.5 psi,any more and you start flooding the
carbs/blowing fuel out through the breather pipes.
As Jacko pointed out,the best thing is a bike
fuel pump.
Andy
[Edited on 9/1/11 by lotusmadandy]
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