vinny1275
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| posted on 16/9/07 at 08:51 PM |
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Which bike carbs for a Pinto?
Hi guys,
After several weeks of no activity, we've been back out in the garage again. We've put the new head on the engine and fitted the engine
and box (and remembered to fit the clutch!!)
Problem is, that with the engine in the car, we can't fit the twin webers we bought for it (the carbs were in my garage while Marc was measuring
the chassis for the Pinto), as they clash onto the chassis rail.
1. We've got a few options - move the engine up on the mounts to clear the carbs over the chassis rails, and possibly drop the ride height of
the car to compensate,
2. Find a cranked manifold to lift the carbs over the chassis rail and put,
3. Switch to bike carbs and sell the webers
4. Switch to bike tbs / injectors and do an mj / ms setup to map the whole lot.
1 and 2 are fairly easy, I can cope with those. For 3 or 4, Ive no experience of bike carbs or tbs, so what would be the ideal replacements? The
engine is a 2 litre pinto with a slightly uprated head, 285 cam, the rest standard.
Cheers,
Vince
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jacko
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| posted on 16/9/07 at 09:04 PM |
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Hi i have Kawasaki zx9r carbs fitted have a look in my photos and do a search on my name all sorts of info in there
Jacko
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robertst
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| posted on 16/9/07 at 10:01 PM |
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bike carbs with megajolt is the best option IMO for the pinto.
megasquirt is just insanely OTT for a pinto. and those twin webers cost a fortune, which you can spend on other parts of the car..
the most common of the bike carbs are from kawasaki's zx9r and Yamaha's R1.. or even other carbs from 1 litre bikes. most (if not all)
these carbs come with a TPS which rigs directly on to the megajolt.
apart from all this, you just need to re-jet the bike carbs to suit your pinto.
i wouldnt be surprised if you end up with more power, and more fuel efficiency than with the twin webers and a conventional dizzy...
Tom
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caber
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| posted on 16/9/07 at 11:09 PM |
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I have webbers on my Pinto they just sit over the chassis rail, I did put spacers on the engine mounts when I changed the trumpets. This brought the
engine up to a decent height for sump clearance. The gearbox mount will also need adjustment.
Caber
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DarrenW
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| posted on 17/9/07 at 08:22 AM |
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I fitted megajolt earlier in the year - a good mod.
Just got the engine running rather welkl with a set of ZZR1100's on it. Very happy with the mod. Boggs made me a manifold so that they cleared
top rail OK but not too steep an angle that the filter would exit the bonnet too high. I need to get them fine tuned but it runs quite well so far. If
youve had twin webers on before then you wont notice much of an improvement id guess.
If i had webers already id probs play around with engine mounts to see if they could be made to fit.
I was quite surprised how easy the bike carb mod was after i got the bits together. Boggs helped me with the initial settings to get it running.
[Edited on 17/9/07 by DarrenW]
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coozer
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| posted on 17/9/07 at 11:23 AM |
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i went with bike carbs, ZX9R and Megajolt as a I couldn't afford Webers. Plus, I've used twin 40's before and they were an absolute
nightmare to get set up.
Mines a Zetec engine. Even so I made my own inlet manifold, bolted the carbs on and it started first time with no adjustments. Compared to Webers
there is only a air screw and bigger jets required, with fine tuning by altering the needle height. I'll be adjusting mine once it's on
the road.
I'm sure if you search on here people have found moving from Webers to bike carbs makes an amazing difference.
Cheap, easy to set up and better fuel economy.
Selling the webers should fund the whole conversion. IMHO
1972 V8 Jago
1980 Z750
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vinny1275
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| posted on 17/9/07 at 12:00 PM |
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Thanks for all the answers guys,
Looks like I might be needing a new soldering iron! If we go for bike carbs I think I'll get Boggs to sort out the manifold, I imagine that I
could quite easily bugg3r that up, and it's a pain having to rethink plans at this stage (but that's an important lesson in itself I
guess...
Cheers,
Vince
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DarrenW
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| posted on 18/9/07 at 08:25 AM |
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I tried fettling a home made manifold and its surprising how many hours you can lose. Makes the Boggs manifold seem decent value (mine was £188 a few
weeks ago). In real terms buying a manifold but sourcing other parts 2nd hand will make the bike carb conversion about £350, then you may need it to
be set up better once its all running. Like most things it all adds up if you add up the little bits and bobs but worth it.
Ive posted my costs recently so worth a search.
Ref megajolt, they can be bought for sensible money so unless you are good with electronics maybe not worth making your own. I paid £100 for the box
with EDIS built in and wiring loom. £20 or so for coil pack and set of leads. £25 for trigger wheel. Managed to get VR sensor for nothing (off a
zetec). Made the bracket so again £0. You may need a USB to serial port adaptor for the laptop comms. so for £150 - 160 you can buy the bits and have
3D mappable ignition. Im happy with the mod.
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Bangar
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| posted on 9/10/07 at 05:18 PM |
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Hello my first post.
If your using bike cars would the megajolt work better with a Map OR Tps Sensor ?
Thanks
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