oadamo
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| posted on 12/5/07 at 09:30 PM |
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how much nitrous
iam building a 2l zetec engine how much nitrous do you think it would take before it gos bang. would lowering the compression help adam
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oadamo
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| posted on 12/5/07 at 09:32 PM |
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ive got a street blaster 100i kit with 25 50 75 100 jets but i could buy some more maybe 100 150 200 what do you think
adam
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big_wasa
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| posted on 12/5/07 at 09:40 PM |
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Let us know how much was to much when it goes pop 
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nib1980
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| posted on 12/5/07 at 09:40 PM |
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no more than 75 jets at first, they give a bigger kick to the engine than you'd think
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oadamo
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| posted on 12/5/07 at 09:53 PM |
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ive only ever run the 50 jets and that was on my rs turbo but it didnt feel like you got the kick cus the turbo
adam
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RazMan
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| posted on 12/5/07 at 10:29 PM |
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I seem to remember a golden rule regarding nitrous - no more than 50% of the standard power of the engine.
Cheers,
Raz
When thinking outside the box doesn't work any more, it's time to build a new box
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BenB
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| posted on 12/5/07 at 10:48 PM |
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I thought the simple answer was buy two engines. Up the nitro till the first goes pop then use slightly less on the second 
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TangoMan
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| posted on 13/5/07 at 06:35 AM |
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I wouldn't lower the compression.
This will give less power and economy when not using nitrous and will undo some of the benefits of the NOS.
I would start with 25 and build up through 50 to 75. It depends what other mods you will be doing though. I am hoping for nearly 200bhp from my Zetec
but I have not heard at what point steel crank and rods become a necessity.
I would think anything over 75 and you may well be requiring forged pistons as the standard ones probably won't be up to the job.
You may also need a better head gasket.
[Edited on 13/5/07 by TangoMan]
Summer's here!!!!
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CaptainJosh
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| posted on 13/5/07 at 09:29 AM |
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1. Why put nitro in an engine? I mean really?
-take some time and money
-buy some decent strong internals
-cam the engine up and rev the nuts off it
It would end up being a much better engine and alot more reliable, if you cover your base's
2. If you really want to run nos-
-Yes, lower your compression, it will stress the engine alot less when all that highly compressed NOS goes into the cylinder. Think about it, its kind
of like running a turbo, your just chucking more fuel and air into the cylinder, hence more power but because the displacement hasn't increase =
more stress. The best you can do is lower the compression to lower the probablity of it pinging.
-Also, run a DIY fuel injection system, you need to make sure your NOS to fuel ratio is perfect, otherwise... BANG!
No offense, I just think Nitro's is a bit of a cop-out way to make power and i know it is definitley not good for an engine
-Josh
[Edited on 13/5/07 by CaptainJosh]
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CaptainJosh
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| posted on 13/5/07 at 04:50 PM |
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quote:
Originally posted by CaLviNx
So if you want spend some money & take very little time, and shoot some laughing gas up the things nose and enjoy the result, and lap up the
squeals/giggles of the female sitting in the passenger seats emits when you hit that button, oh ye baby......
Okay...
Well I was simply speaking from the standpoint of what it will do to the engine and warning of the obviouse problems that seem to be overlooked by
many.
The female in your driving seat is really going to be laughing when you press the red button on your steering wheel and you throw a rod out the bottom
of the sump of your engine.
If you really want to run NOS, get some forged internals and lower the compression, full stop.
-Josh
[Edited on 13/5/07 by CaptainJosh]
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DIY Si
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| posted on 13/5/07 at 07:41 PM |
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Besides, if the engine is otherwise standard, then it's some of the cheapest power you can get, without the hassle of having a lumpy cammy
engine with no low down guts. You get a nice civilised engine when required, and a nice lairy one when you wish. I recently brought a car with NOS, a
205 Mi16 with 170 bhp, which has 50 bhp NOS jets. I rarely need it, but when I do having a bit extra at the touch of a button is quite handy. No extra
hassle at all, as the engine will quite happily take that bit of extra power. You'll only ever have it on for a few seconds at a time anyway, so
what stress there is is minimalised.
“Let your plans be dark and as impenetratable as night, and when you move, fall like a thunderbolt.”
Sun Tzu, The Art of War
My new blog: http://spritecave.blogspot.co.uk/
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