Nitrous for Beginners

[e21Mark]

I plan to bump engine performance up by about 90bhp, in an effort to get my old e21 BMW to a 300bhp/ton power to weight ratio, but as I've never run a car with gas before I figured some advice might be prudent.

The engine is an M52/2.8 that has had a 2.5 manifold swap and big bore throttle body. Being a 30+ year old car there are no cats and the exhausts are simply 50mm mandrel bent with relatively small silencers. The ECU has been tweaked. Surrey Rolling Road's dyno show 220bhp and the car weighs in at 1010 kgs.

I am told that I should be able to run a 100bhp shot of gas through a fogger nozzle with relative ease? I have a very basic understanding of what this involves but are there things I should look out for? Can the plastic BMW inlet manifold cope? Would it be safer to settle for 75bhp?

Any help / advice would be much appreciated. I'm only going to be running gas for a few fun days at Santa Pod or possibly embarrassing the odd Porker maybe.

[DrDeAtH]

Speak to wizards of nos. The stuff they sell isn't the cheapest, but its a million times better than the American kits.

[Mark.H]

DrDeAtH said:

Speak to wizards of nos. The stuff they sell isn't the cheapest, but its a million times better than the American kits.

+1 million, I had a ford focus running nitrous, I don't know if Anthony is still there but he really knew his kits, and of course there is Trevor there. From memory I'd suggest that re-mapping a car then running nitrous can lead to the mixture running lean and the engine melting. The car should be mapped to run Nitrous....either way, just call the WON guys, they'll set you down the right path, can't recommend them highly enough.

[psummers]

e21Mark said:

Can the plastic BMW inlet manifold cope?

You'd be lucky if that 100 shot of NOS didnt blow the welds on your intake.

But if its a plastic manifold then you should be fine