Most Powerful N/A 2.5 possible??

[Theo]

I do, have you got nos-cream injection? only joking, was going to contact you but saw that you were selling your bbs as you had got yourself some alpinas, i assume you had sourced some from elsewhere??

[oguz327]

Ive been tempted by nitros but still undecided, i guess your engine has to be in good shape for a start, mine has a few niggles at moment so mabie once its all sorted i may reconsider.
With nitros it seems to depend on who you speak to as to wether its worth doing, i know alot of people on here dont like it but then again i wouldnt let that stop me.
Ive heard the horror stories and then other peple say its all a mith, if i had nitros id probably end up with a ban anyways:mad: lol

[Chaos]

i may be wrong but i have a pretty fair theory on why very few people do big power 2.5's or even 2.7's

part of it is bmw's own reliability.
a 200k mile m20 is far from unknown and in fact many people would be disappointed if there bmw didnt make that sorta mileage without many issues - ask yourself how many 200k mile vauxhall xe's or ford pinto/cvh etc that you see or hear about. a big fat zero there methinks.
with fewer rebuilds needed etc as such theres less off the shelf stuff available.


the 2nd part is that with the cars being 6 cylinder u need 50% more parts to do anything useful with it.
this brings an expensive job into the fcuk me category.
throttle bodies, engine rebuilds, even porting etc - u name it, its more expensive.


thirdly bmw has many engines available that can be slotted in
the m20 is close to the bottom rung of the ladder, and a power upgrade (along with a weight increase) is readily available with an m30 (cheap) or better - m power lumps etc.
why spend £3k on a top spec m20 with special pistons, cams, throttle bodies etc when for the same money (or less) you can have an S50 slotted in which has more power before u even think about mods and is a production engine with production reliability

obviously there is more to it, but i think whats mentioned is a big part of it.



nitrous.
if it floats your boat then yeah, but its not permanent - what happens when the bottle runs out. its not like its available at petrol stations etc

[Andreas]

The problem with NOS is that it is so addictive - you always want to floor it just to feel that push one more time. It may be cheaper to install but in the not too long run it will be expensive - you start off re-filling your bottle once every 2 weeks, then once a week, then you buy a second bottle because one doesn't last a week anymore ...

Another thing that used to piss me off with NOS is that just when you are standing at the robot next to a M3 - your bottle is empty!

Turbo or strong N/A is still the better choice.


Alpina B3 2.7 Racecar under construction.

[M5pilot]

I remember a drive in Dale's car where he had NOS.

The difference was huge with the NOS on.

What size bottles are there and how much do they cost to refill?

[Taylor325i]

Anybody thinking about nitrous should look at the pics of the burnt out E30 M3 that was posted on here a few months ago - if it hadn't run on nitrous it would still be alive and well.......

I'm not saying don't fit nitrous - just think of the possible consequences, that's all!



I,m sure somebody will be able to provide a link to the pics I'm talking about......



Taylor.

[maxfield]

This one clicky click

[Taylor325i]

That's the one - cheers Maxfield


Take note guys.



Taylor.

[dodgydodger]

but ifi rember that car had a serious nitroskit on i dont mean 150bhp kit i am talking well over 500bhp kit! nitros is also i a sealed botle with backfeed valves etc! that car also if i remberwas running alcahol!! now thats summit totake into mind! but it cheep bhp and if you sensible about you nitros jet size you will have a quick e30 for£600!

[gareth]

i reckon you've hit the nail on the head there chaos... with one major exception. never tar the pinto with the same brush as the CVH!!! the CVH as an abortion of an engine that smokes like a bastard from 20k onwards and then goes pop at 80k. the pinto is in my experience as strong as the M20. the only weak spot is neglected oil changes causing blocked spray bars and subsequent cam wear but this should be familiar to most m10/m20 owners too! my pinto was still going stronmg when i sold it and that was after 25 years of putting out 160 - 180 bhp depending on tune at the time.

will a M20B25 head last that long without cracking?

the vauxhall XE's aren't too bad either but tend to get thrashed to within an inch of their lives for 90% of the time!

[oguz327]

The problem with NOS is that it is so addictive - you always want to floor it just to feel that push one more time. It may be cheaper to install but in the not too long run it will be expensive - you start off re-filling your bottle once every 2 weeks, then once a week, then you buy a second bottle because one doesn't last a week anymore ...

Another thing that used to piss me off with NOS is that just when you are standing at the robot next to a M3 - your bottle is empty!

Turbo or strong N/A is still the better choice.


Alpina B3 2.7 Racecar under construction.

Thats the main thing that put me off, i know if i had nitros fitted id be hooning it everywhere, just would be able to help myself, i bet it is adictive.
This would make it expensive in the long run for me but i still wouldnt mind giving it try one day, mabie not on the e30.
Id never niro a car like an M3 though, no need

[Kevin_Johnson]

Hmmmmm, I'm extremely dubious about those trap doors.

What would compell them to close on cornering?!

They presumably hang down during normal operation yes?

If so, it's gravity making them dangle and gravity down here is 1g.

I'm guessing that there aren't many E30s which can make more than 1g of cornering force which a very simple vector diagram in anyone's mind tells us that those trapdoors will only get to a maximum of 45degrees!

Actually you want them to stay open under most circumstances because they allow oil to drain down the side of the block into the sump. Your vector analysis is neglecting some important forces.

When the car goes into hard left sweepers more windage is caught up and this normally slams right against where the doors are located (remember the crank is rotating clockwise as viewed from the front of the engine). The doors help prevent this windage from rocketing up the side of the block.

This has been a classic problem with the tilted engine design over the past 40 years or so (going back to at least the Chrysler slant six Hyperpack road race cars through the BMWs and Porsche 928 and 944/968 engines).

And it works empirically. Q.E.D.

[E30BeemerLad]

here you are guys

everything you ever wanted to know about Nitrous, and how to build your own system.
really cool site for what looks like good advice & info
http://www.diy-nitrous.fsnet.co.uk/index.htm