stuart_g
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| posted on 16/11/09 at 08:10 AM |
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What throttle bodies on your Zetec?
I'm thinking of replacing the Griffin power systems inlet I currently have for some throttle bodies from a bike.
I know some use the GSXR 750/1000 as some can be individually respaced. I would ideally like the throttle bodies to have a built in cold start/choke
arrangement that's plumbed into the cooling system. Just wondering what people were using.
Engine is a 2.0l silvertop.
[Edited on 16/11/09 by stuart_g]
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SeaBass
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| posted on 16/11/09 at 08:18 AM |
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ZX12R - Yes they're probably too big but they work and have almost perfect spacing from the bike.
Most FI systems use warm up enrichment of the mixture rather than "choke" etc.
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robocog
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| posted on 16/11/09 at 08:37 AM |
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R6 on mine
Have got the wax choke mech, which did get respaced, but not fitted or needed it yet and was thinking of just using a cable to operate it
I also bought an aquarium air valve that could plug into the vacc takeoff lines to the TB's that should in therory raise the RPM in a nice and
controlled way, and it could be stuck in cockpit easily enough
the coolant plumbing side of the original wax controller looked like it wasn't going to be able to be done neatly (and gaurantee a good flow
through those teeeny connectors that the bike had) so kind of ditched the wax stat idea
Still not got a "choke" or extra air bleed sorted, but MS does have the warmup enrichment feature that does work very well, but does
require a bit of throttle feathering for a few seconds after starting on the worst days to keep it going which I can live with....its a race car
innit...
Regards
Rob
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will121
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| posted on 16/11/09 at 10:10 AM |
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I got GSXR600, think 38mm but would need to check size though, currently ok for 150bhp, think early GSXR750 throttle bodies had a cam type arrangement
on a choke cable which acted on the throttle linkage to slightly increase revs, but ive removed mine with use of manual right foot till warm
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coozer
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| posted on 16/11/09 at 11:02 AM |
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CBR1000Rr on mine, have a coolant operated FIdle valve, air bleed circuit and could be turned over to manual cable operated, although not sure if
required with MS atm.
1972 V8 Jago
1980 Z750
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Jenko
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| posted on 16/11/09 at 11:11 AM |
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I have GSXR600 on my engine (athough it's a tuned 2ltr CVH), and these are currently flowing 203bhp....They are tapered down to 38mm and seem
perfect.........
Paul.
MY BLOG - http://westfieldv8.blogspot.co.uk/
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MikeR
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| posted on 16/11/09 at 12:25 PM |
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In theory, with weber carbs you put in an insert (choke) to reduce the diameter of the barrel.
If you took a larger throttle body, what is to stop you doing the same? What effect does it have if you place the choke at different places?
Eg before the butterfly?
I'm thinking having the choke just before the fuel injector would be best to speed up the airflow.
This way you could use the larger thottle body without sacrificing drive ability.
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will121
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| posted on 16/11/09 at 01:16 PM |
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quote:
Originally posted by Jenko
I have GSXR600 on my engine (athough it's a tuned 2ltr CVH), and these are currently flowing 203bhp....They are tapered down to 38mm and seem
perfect.........
Paul.
is 203bhp naturally aspirated or turbo ZVH conversion? as ive got GSXR600 at moment and were going to change to larger 750's
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StevenB
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| posted on 16/11/09 at 01:27 PM |
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GSXR 750 2001 on a 2L silver top
with a manifold from Bogg Bros.
Non spaced.
Just trying them for size.
s.JPG)
*
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Jenko
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| posted on 16/11/09 at 03:22 PM |
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quote:
Originally posted by will121
quote:
Originally posted by Jenko
I have GSXR600 on my engine (athough it's a tuned 2ltr CVH), and these are currently flowing 203bhp....They are tapered down to 38mm and seem
perfect.........
Paul.
is 203bhp naturally aspirated or turbo ZVH conversion? as ive got GSXR600 at moment and were going to change to larger 750's
Hi, It's N/A using a ferriday bottom end (so pistons are pocketed).....The head is ported and runs a fairly lairy cam and solid
lifters........But the GSXR600 set up seems to run it perfectly....I actually think I could get more top end if I tried, but I'm enjoying the
torque too much :-)
Some photos if it's any use:
Engine 1
Engine 2
Latest Dyno run
MY BLOG - http://westfieldv8.blogspot.co.uk/
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.JPG)
