Barksavon
|
| posted on 4/9/10 at 04:35 PM |
|
|
Bike Carbs On Pinto
Ive just bought a set of bike carbs with a manifold for my Pinto, tried to fit them today and the left hand carb is fouling on the distributor cap and
wont fit, has anyone had this problem before, will one of the angled distributor caps get me out of this fix or any other suggestions welcome.......
|
|
|
|
|
ashg
|
| posted on 4/9/10 at 04:39 PM |
|
|
you shouldn't be using a distributor with bike carbs as you wont have any vacuum advance which will make the car slower than it was before you
changed the carbs.
ideally you need a ford edis ignition unit with a megajolt and a rr session to see any benefit
Anything With Tits or Wheels Will cost you MONEY!!
Haynes Roadster (Finished)
Exocet (Finished & Sold)
New Project (Started)
|
|
|
interestedparty
|
| posted on 4/9/10 at 04:47 PM |
|
|
quote:
Originally posted by ashg
you shouldn't be using a distributor with bike carbs as you wont have any vacuum advance which will make the car slower than it was before you
changed the carbs.
ideally you need a ford edis ignition unit with a megajolt and a rr session to see any benefit
I agree about the rr, but not to sure about the rest, I'm surprised there is no vacuum with bike carbs (are you sure about that) but vacuum only
significant at low throttle (when the most vacuum) so under full acceleration shouldn't really make any difference IMO
As some day it may happen that a victim must be found,
I've got a little list-- I've got a little list
Of society offenders who might well be underground,
And who never would be missed-- who never would be missed!
|
|
|
DRC INDY 7
|
| posted on 4/9/10 at 05:15 PM |
|
|
quote:
Originally posted by ashg
you shouldn't be using a distributor with bike carbs as you wont have any vacuum advance which will make the car slower than it was before you
changed the carbs.
ideally you need a ford edis ignition unit with a megajolt and a rr session to see any benefit
Rubbish i have bike carbs on my pinto with stock bosch distributor no vac connected and running 15 degrees btdc at 800rpm no problems and goes like a
rocket
https://www.facebook.com/groups/462610273778799/
Puddle Dodgers Club
|
|
|
bigpig
|
| posted on 4/9/10 at 05:26 PM |
|
|
I've got a set of GBS bike carbs with a big sausage filter. No clearance issues at all. I'm using a normal dizzy with no vac connected and
its all fine. Was just told to set at 30 adv @ 3500 rpm (or was it 3000, I can't remember now).
|
|
|
RichardK
|
| posted on 4/9/10 at 05:49 PM |
|
|
quote:
Originally posted by ashg
you shouldn't be using a distributor with bike carbs as you wont have any vacuum advance which will make the car slower than it was before you
changed the carbs.
ideally you need a ford edis ignition unit with a megajolt and a rr session to see any benefit
Nah, you'll be ok if you can squeeze them in mate, just block off the vacuum tube to the dizzy and leave it as static it'll be fine!
Megajolt/edis is better though, more controllerable, you may find on static its maybe lumpy at tick over or may have a slight flat spot but should
still be driveable.
Cheers
Rich
Gallery updated 11/01/2011
|
|
|
jacko
|
| posted on 4/9/10 at 05:53 PM |
|
|
Or buy a modified dizzy from H&H ignition solutions 
|
|
|
mcerd1
|
| posted on 4/9/10 at 06:10 PM |
|
|
there are a few different kinds of dizzy and caps around, and it depends on the style of manifold and so on.......
so first off have you got any pics ??
(you don't need megajolt, but its probably the cheapest 3D mapable setup which would help your fuel econnomy and drivability)
[Edited on 4/9/2010 by mcerd1]
-
|
|
|
interestedparty
|
| posted on 4/9/10 at 06:14 PM |
|
|
So why no vacuum with bike carbs then? Do they work on a different principle? What happens in the inlets when the throttles close?
As some day it may happen that a victim must be found,
I've got a little list-- I've got a little list
Of society offenders who might well be underground,
And who never would be missed-- who never would be missed!
|
|
|
snapper
|
| posted on 4/9/10 at 06:19 PM |
|
|
If the carbs are spaced and the manifold is straight then the No.1 inlet will just cut through the top of the distributor cap regardless of what cap
you fit.
Megajolt or new manifold, given the cost of either I would go megajolt
I eat to survive
I drink to forget
I breath to pi55 my ex wife off (and now my ex partner)
|
|
|
jacko
|
| posted on 4/9/10 at 06:21 PM |
|
|
 
carbs on manifold
 
engine
|
|
|
snapper
|
| posted on 4/9/10 at 06:21 PM |
|
|
There is vacuum with bike carbs, some have a vac take off on the carb others need a take off from each inlet runner others use TPS instead of vac
I eat to survive
I drink to forget
I breath to pi55 my ex wife off (and now my ex partner)
|
|
|
RichardK
|
| posted on 4/9/10 at 06:22 PM |
|
|
There is vacuum when using bike carbs but it would mean taking a "take off" off each inlet and connecting them to a sealed box and then
another tube to the dizzy, the box is there to utilise all four vacuums and equalise all of the pulses.
I think, that's how it works in my head any how and people just cant be arsed as they tend to be ok just blocked off.
Cheers
Rich
[Edited on 4/9/10 by RichardK]
Gallery updated 11/01/2011
|
|
|
mcerd1
|
| posted on 4/9/10 at 06:24 PM |
|
|
quote:
Originally posted by interestedparty
So why no vacuum with bike carbs then? Do they work on a different principle? What happens in the inlets when the throttles close?
there is a vacuum, in fact there are 4 seperate ones that come and go as the valves open and close and thats what causes the problem
(its not just bike carbs, its any setup with 1 carb per cylnder)
on a single carb there are connected together in a big plenum and it averages out the vacuum so the carb gets a nice constant load signal and adjusts
the advance curve accordingly
you can join the 4 different ones into a seperate chamber and then take a feed off that to the carb, but its much simpler to either get a carb with
the vacuum advance removed (a 2D system) or use TPS sensor with an electonic system like megajolt which is a fully programable 3D system (and
can/should be cheaper than an uprated dizzy)
[edit]too slow again.... 
[Edited on 4/9/2010 by mcerd1]
-
|
|
|
mcerd1
|
| posted on 4/9/10 at 06:29 PM |
|
|
btw - you can get these caps for bosch dizzys
(some twin webber setups have caused the same problem for years)
but I'm not sure exactly which dizzy it fits...
-
|
|
|
Barksavon
|
| posted on 5/9/10 at 11:32 AM |
|
|
thanks for the responses and particularly the photo's, i'm considering megajolt but dont know whether i'm up to fitting it...is it
difficult. I may try one of the dizzy caps shown in the photo cos its definately not going to fit with the manifold ive got as its not offset to allow
the 1st carb to miss the dizzy......Theyre not problems theyre 'challenges' i keep telling myself.
|
|
|
mcerd1
|
| posted on 5/9/10 at 08:20 PM |
|
|
dizzy caps linky
[Edited on 5/9/2010 by mcerd1]
-
|
|
|
