greavesy7
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| posted on 20/1/15 at 10:12 PM |
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Zx9 tuning
What sort of mods are there for a zx9 engine and what sort of gains would you expect
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Wadders
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| posted on 21/1/15 at 08:45 AM |
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IMHO the only mod worth doing on such an old engine would be fitting a turbo which should give you about 200 bhp.....you can get a big bore kit and
get head work done but it would be cheaper and easier to drop a ZX12 in or any of the modern 1000's........instant hp hike.
ZX9 was a great engine in its day, but old hat now, rather than tuning or swapping, losing weight can help it compete with newer engines.
Al.
Originally posted by greavesy7
What sort of mods are there for a zx9 engine and what sort of gains would you expect
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dave_424
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| posted on 21/1/15 at 11:16 AM |
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Converted mine to megasuqirt fuel injection, turbo from a volvo. Makes 225bhp at 15psi of boost with no problems, it is in an offroad vehicle though
so not driven it much after the turbo compared to a road car.
See both my threads
Here at 7psi boost made 181bhp with a bad turbo manifold and other things http://www.locostbuilders.co.uk/viewthread.php?tid=184992
Here is at 15psi, better turbo manifold, all boost leaks fixed http://www.locostbuilders.co.uk/viewthread.php?tid=193224
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200mph
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| posted on 21/1/15 at 04:15 PM |
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quote:
Originally posted by dave_424
Converted mine to megasuqirt fuel injection, turbo from a volvo. Makes 225bhp at 15psi of boost with no problems, it is in an offroad vehicle though
so not driven it much after the turbo compared to a road car.
See both my threads
Here at 7psi boost made 181bhp with a bad turbo manifold and other things http://www.locostbuilders.co.uk/viewthread.php?tid=184992
Here is at 15psi, better turbo manifold, all boost leaks fixed http://www.locostbuilders.co.uk/viewthread.php?tid=193224
Do you have an idea of your total spend on the conversion?
Cheers
Mark
If it isn't broke, fix it until it is
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dave_424
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| posted on 21/1/15 at 07:54 PM |
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Just megasquirt or full turbo conversion?
If just the megasquirt, then
Megasquirt with loom - £300
Z1000 crank wheel - £10
ZX10 throttle bodies and injectors - £60
Injection fuel pump - £30
Fuel pressure regulator - £60
Thats pretty much it, unless I'm forgetting something
For the turbo its that plus
I Tig welded the exhaust manifold - £80
Turbo - £60
I used an external wastegate - £70
those are the main things, other misc things like hoses, boost pipes, intercooler (free), plenum (rover v8) etc - £100
I'm sure there are some other things that I have overlooked that bumps up the price a bit but those are the main things. I would say it could be
easily done for under £800-1000
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200mph
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| posted on 21/1/15 at 08:10 PM |
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Very interesting, thanks!
If it isn't broke, fix it until it is
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dave_424
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| posted on 21/1/15 at 08:59 PM |
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I did get a set of forged pistons for £50 and a cylinder spacer because I wanted a reliable strong engine for 15 psi, but I ran 7 psi on an unopened
engine. I expect you could easy run 8-10psi on a stock engine just spacer and get 200bhp. When I removed the stock pistons and they looked great with
no destination marks or anything
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greavesy7
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| posted on 21/1/15 at 09:03 PM |
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It's a 2003 engine so I wouldn't say it was that old. What sort of power do you get from standard with a 4 branch and a performance air
filter ?
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40inches
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| posted on 21/1/15 at 09:24 PM |
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quote:
Originally posted by greavesy7
It's a 2003 engine so I wouldn't say it was that old. What sort of power do you get from standard with a 4 branch and a performance air
filter ?
I think it unlikely that you would get any power increase from changing from the standard "F" exhaust and air box, there may even be a
power loss  http://www.locostbuilders.co.uk/viewthread.php?tid=186736
A rolling road session, done by a tuner who knows bike carbs, would be the most cost effective way to maximise power output.
ZX10R throttle bodies/injectors fit without modification, and give a healthy increase across the rev range, but will need the 10R ECU or a Megasquirt
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I think it would be better to get it set up and use it for a summer first, you may be pleasantly surprised 
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greavesy7
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| posted on 21/1/15 at 09:41 PM |
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I've not driven it yet so I'm sure I will I just like researching !
Dave is there a reason why you kept to the standard air box over a pipercross sausage filter ?
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40inches
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| posted on 21/1/15 at 09:46 PM |
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I asked the question myself here; http://www.locostbuilders.co.uk/viewthread.php?tid=186736 So, based on the replies, I kept it 
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greavesy7
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| posted on 21/1/15 at 09:47 PM |
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Smeak peak
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greavesy7
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| posted on 21/1/15 at 09:50 PM |
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greavesy7
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| posted on 21/1/15 at 09:52 PM |
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40inches
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| posted on 21/1/15 at 09:53 PM |
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Looking good , does it run OK?
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greavesy7
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| posted on 21/1/15 at 10:00 PM |
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[IMG]http://i53.photob
ucket.com/albums/g52/Greavesy7/Mobile%20Uploads/th_trim.4C0CCDC4-2FE3-49C5-B99F-5B915CD71C3B_zpsuowye5wd.mp4[/IMG]
What do you think
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