NOS

[The Mighty Elvi]

Just re read your post, the 150 bhp is potentially on top of the existing figure....

+1 there. My bad.  Thought your existing engine was going to be boosted to 150 BHP.

[tomp]

Nah its already way past the 150 mark, can't remember the exact figure but it was over 200 when it was originally mapped on Stealth's rollers, that was a few years back now though. Its due a rebuild so while I'm at it.....

Nitros looks interesting, wasn't expecting to be ridiculed for considering it!!!

[DOA]

You get ridiculed for everything on here unless your boring and predictable and follow the herd, fit an ABF, junk K-jet, never fit coilovers etc etc etc...

I would be a bit carefull running nitrous with your particular ECU setup as you need to be able to tweek the ignition timing to suit when it hits for best reliability but if you can do that it should be fine. Other than that, dont be stupid with your expectations and theres no reason not to if your gearbox is up to it and your only after it for kicks and giggles, better than spending a fortune on expensive mods to get the extra power in my view and with minimal consequences in real terms for the gains you get (people still fear nitrous through ignorance).

[tomp]

Thanks for that....

K-Star although probably a bit dated now, it does let you control the ignition retard and advance at any point in the rev range as well as the fuel going through the extra four injectors.

Have already spent the fortune on expensive mods, just toying with the idea of this now, having read up on it a bit and it certainly looks fun and I am convinced that it works.

Would like convincing that it can be reliable too though!

[DOA]

AS long as the engine and drivetrain are in good shape, you set realistic goals (a 150 shot is far too much and they may not even sell it you if they think your a muppet) and you get it fitted properly following their advice on ignition timing it should be fine. The major extra stress here is the cylinder pressures which could conceivably be an issue of your running stock pistons but they see far more load from engine revs rather than cylinder pressures so reduce your rev limit a tad if your really worried (make sure you do have a rev limiter!), other than that its pretty damn safe if done properly. You appear to be taking the sensible option of looking at doing a rebuild before hand so there should be no issues. The problem comes when your names barry and you frequent halfords.

Just a thought, have you considered buying a book on the subject?

[dan_apps]

agree with the above the only thing i would have concern with is age of the engine etc. if your saying you have/having a total rebuild then you have far better chance of the engine not giving up.

be interested to see this as i dont know of another mk2 running nos.

[tomp]

Just considering the idea of fitting it at the moment, if I decide to do it then I will research it as much as possible. Wouldn't even consider a 150 shot, the car is a toy but I do want it to be reliable, the conversion has been brilliant and never let me down (other than gearboxes!). The car is very driveable, that's what I wanted, I am not running huge amounts of boost, I just wanted to have a quick mk2 and its definitely the quickest I have ever been in.

There is nothing wrong with the engine, the rebuild is purely because the car is getting fully restored so its more a precaution than anything else, it will be interesting to see how the pistons look when the head is off after quite a few years of forced induction. Forged pistons are always an option....

When I built the engine I knew of only one other 8 injector 16v Turbo, it took ages to find an original Turbo Technics kit which was then modified (they only ran one extra injector and where it was located meant that 1 and 2 didn't get as much fuel as 3 and 4 so it wasn't that great - I have the 4 extra injectors machined into the inlet).

I was definitely the first person to run water injection on a mk2, Vince at Stealth was amazed at how cool it ran on the rollers while it was being mapped, the inlet manifold was ice cold after lots of hard runs! Pretty sure that Stealth are now Aquamist agents, Richard Lamb at ERL Aquamist was really interested as to how we were getting on with the kit at the time.

Cheers
Barry

hehe its Tom

 

[tomp]

Its probably a while off to be honest!!!!

[tomp]

And before (several years!)

[Chris-White]

Yes it is a great idea until it goes bang

it will only go bang if you dont match the fuelling to the nitrous, or if you go too crazy with the amount of nitrous.

sensible application of nos isnt dangerous at all really, just takes a bit of brainwork, like any proper tuning.