daveb666
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| posted on 23/7/13 at 08:05 AM |
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Bike Throttle Bodies Fuel Rail Query
In the example how-to given on this website it says you can use an ST170 manifold and fuel rail. The fuel-reg is removed and an adjustable one
fitted.
http://www.sportingfords.com/forums/viewtopic.php?f=16&p=19574
I'm using a 'standard' zetec manifold so the fuel reg is sort of incorporated into it;
Can I simply blank-off/weld over where the fuel reg was and then add one as per the initial instructions? The inlet on my car is custom anyway and
will be ideal for fitting the TBs on so I don't want to have to go on the hunt for an st170 one if I can help it.
Thanks
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big_wasa
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| posted on 23/7/13 at 09:50 AM |
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The fuel rail you have there takes side feed injectors. You would be much better selling your manifold as an iva proved kit and getting one made in
alloy. Your manifold is anything but standard.
You will be better off with end fed injectors giving you greater choice.
Are you going carbs or throttle bodies ? I assumed from the Nodiz bulk buy post you where going for carbs ?
If I couldn't do my own my money would be going to one of the people.
Bogg brothers
Atliss engineering.
Fast Dan (on here )
[Edited on 23/7/13 by big_wasa]
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daveb666
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| posted on 23/7/13 at 09:58 AM |
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I knew the image I chose would be wrong 
I know what you're saying about the inlet but I like the idea of using the existing rail. I have bodies not carbs
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big_wasa
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| posted on 23/7/13 at 11:24 AM |
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The rail in the pic is the same as yours.
The end fed rail won't fit your mani.
Unless your planning on running the injectors on the tb's then you will still need the fuel regulator in the rail unless you plan on having an
external one ?
I wouldn't bother with the st170 manifold. The ports are 10mm to high. By the time you have blended them you will be losing gas speed.
Any chance of putting it on a dyno before and after ?
[Edited on 23/7/13 by big_wasa]
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daveb666
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| posted on 23/7/13 at 11:28 AM |
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Plan was to retain (ideally) the original fuel rail and injectors. I was planning on having an external regulator as I need a min of 3 bar for the
bike TBs - what does the current one run?
I guess that's what my initial question was; can I remove the on-rail regulator and weld over etc to then use an external one?
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big_wasa
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| posted on 23/7/13 at 11:36 AM |
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Imho is not the right way.
I guess you are upping the pressure as the injectors will be maxed out. ?
I Wouldn't like your chances of the weld holding at three bar with no leaks.
Have you thought about the id of the rail, will it flow the volume you are looking for ?
What's your end plan ?
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daveb666
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| posted on 23/7/13 at 11:39 AM |
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Rail and injectors should be fine based on what I've read. Looks like the easiest option will be to buy an ST170 inlet c/w rail and injectors
and modify it as per the link in the initial post. Then sell on the current one to recoup some costs.
I would like to get it on the rollers before I do anything Warren; I'll try my best
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big_wasa
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| posted on 23/7/13 at 11:44 AM |
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I would be willing to contribute a little to the dyno costs for a copy.
The st mani is a bodge but I can send you a link of a guy selling one cheap.
What ecu are you planning on using ?
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daveb666
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| posted on 23/7/13 at 11:50 AM |
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Bodge is a bit harsh; there are loads of cars out there running this setup and it is meant to be 'locost' after-all. I can't justify
spending £150 for a FASTdan inlet and then still need to buy + trumpets +filter + fuel rail + injectors etc.
Think I've found an st170 manifold+ injectors + rail for <£60 so if I get that it just leaves the filter/trumpets and regulator to get sorted
on top.
ECU will hopefully be MBE as I've had that on previous cars but if I can't find one for a suitable price it will be MS.
Getting on the rollers will be more down to time than money so no problem in sending you a copy of the print-out.
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MikeRJ
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| posted on 23/7/13 at 01:44 PM |
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I'm pretty sure the standard fuel pressure for the ST170 is 3 bar.
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big_wasa
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| posted on 23/7/13 at 03:33 PM |
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What you have should be ~150bhp give or take. Your engine is good for 165bhp. Some say a little more but I doubt that.
To get the extra 15 you will need an aftermarket ecu and to tune the inlet.
Just my humble opinion. If I am going to far tell me to but out 
Yes I believe in the locost way more than most. But to back up what I am saying about the st manifold.
The ports are 10mm higher so to blend them you have to drop the floor and blend them. There isn't enough material to match the ports so you end
up with a ledge. Combined with this the engine side of the manifold has a bigger area than the inlet meaning the gas speed of the inlet charge drops
giving less atomisation of the fuel and so on.
I have made Itb setups. The laser cut inlet plates can be had for around £20 and just add four bits of tube. The result is the same as the st
mani' but the ports match. bike Itb's have there own problems with them being very much on or of.
I love fuel injection but Bike carbs would be the cheapest way to free the extra 15 horses.
For some one wanting to put a post 95 zetec through iva I feel yours setup should return at least £300+ to put into your new set up.
 
Engine looking Better
cheers warren
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daveb666
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| posted on 23/7/13 at 03:37 PM |
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I don't have any skills (or tools) as a welder though Warren, so making my own manifold is not a suitable option for me.
I always intended on having TBs (even if only for the noise) and I love turn-key solutions, something which from my past experience with carbs, I
can't get. I also like being able to plug in a laptop and tinker and have full control over the engine.
The throttle bodies are already in the garage and all spaced and ready to go so it's too late to turn back at this point I'm afraid.
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big_wasa
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| posted on 23/7/13 at 03:55 PM |
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And I am sure they will sound great 
give me a shout if you need a hand.
What throttle bodies have you got ?
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