excellent John, no probs here.

as you were gentelmen

 

bah...... my post got deleted lol

Dave - when you get up and running again, and if you decide to get a laser diffuser, give me a bell and we'll sort out a "test session"

Anyway - you got the MY99 ECU on your to-do list?

 

Steve, not yet, but maybe if I buy a newer car..

David

 

I'm following along in Kansas City.

 

cheers..

Would like to say thanks to the email from zeb and DSR (DubSpeedRacing), WCC (Wicked Circle Crew)..

Oh and Ill be in touch!!



David

 

 

mail me your questions, comments about nos... as Im having doubts..

 

I dont think NOS is worth the hassle, Possibly for removing lag maybe, as it would use less gas, but otherwise, it just doesnt last long enough. It would work very well on a turbo car, due to the cooling effect it would have on the inlet charge, but its about the only good thing I can think of. With a turbo'd engine, there is enough potential for power to destroy the internals anyway, so why do you neeed NOS?? Get a good ecu, cool charge, big turbo, and my favourite...boost, voila, youve got some power.
Now smaller NOS jets might yield more power on a turbo engine than on a similar N/A engine, again becasue of the cooling, but its still a sh1tter when you go to race, and oh no, the bottle runs done.

 

its the cost of the gas and the hassle trying to account for the fact there may be nitrous in the map...

Might be easier just to sell it on... but ill look into it first.

David

 

I was going to say why not get the car back together and running standard map and then fit the NOS and see if it is viable option etc.. but then I guess it would be easier to plumb the NOS in now rather than have to take things off to fit the NOS later...

You might as well try it... then you can say you tried it!

You could have a map for with and map for without.. swap between the two.. if NOS no good then remove it and sell it on then?

I am waffling now and I am sure you have considered all of this already so I shall go back to work now..

JGM

 

David, not heard from you about the pulley yet??
Any good??
p.s. i'm gonna have to replace the front tie bar as it does have a purpose after all

 

A nitrous kit where you have seperate solenoids for fuel and N20 (so called wet kit) should work regardless of mapping as it puts the the fuel to burn the N20 with. Just need to make sure fuel pump is up to it, but at low revs should be fine.

In theory you should be able to just put it on and it will work.

if you can get it to turn off at certain speed, and only come on at full throttle and possible with the additoin of a steering wheel button, should last ages.

Paul

 

I never got it rob?? Ive got an idler pulley from a scrap yard now...

Paul I was going to use a voltage comparator on the map sensor signal and make it so I can vary the threshold.. so it comes on off boost at WOT... It is a wet kit... Ill see what happens I suppose...

David

 

Sorry but why does page 29 of this thread not show on the drivetrain forum menu??

 

secret page, like secret levels or hidden tracks (that are not hidden at all).

 

 

Fuzz... so your saying that I shouldnt be using it to eliminate the lag..... ie below 4000rpm at WOT?? as the pistons wont like it??

Im only planning on using 25bhp / 50 bhp jet.. (Basically the smallest jet I can find..)

Thinking about ditching my engine now though...

David

 

hmm, I doubt there is much problem if you use it in moderation.

if it were triggered from 1800-3000 rpm, with small jets it could work okay, well, I think anyway.

Possible that you might get some det I suppose, but we are talking here about off to low boost, so I doubt it. The NOS also drops charge temps, which should help reduce it.

How exactly did your ring land go? What sort of engine speeds boost etc?

Last months CCC mag, or recently anyway had Nissan GTI-R that used NOS to get rid of lag.

Paul

 

that's how I threw mine together. it's p1ss easy to take off if it doesn't work.

David,
I will state that I was using a 150bhp jet but...
the twice that it got engaged at low rpm situation it let go.
me being a **** and forgetting to turn it off when I got to a set of traffic lights,
If your concerned about it, have a chat to TTS in Silverstone (mainly bike tuners) they are the distributors of the express kits we both have. they know far more than I profess to !
01327 858212

 

150 jets are WAAAAY to big for a 2.0 litre motor at low rpm

At say 2000 rpm a scoob is producing around 30 bhp on a good day, you are bumping it up 500%.............think about it, the ignition advance is dictated by MAF and TPS, it wouldn't know the NOS was on so you would also have high advance........BANG

 

Pavlo,
ringland -
1st compression ring, crown of piston melted on edge a liitle, didn't look too bad while in bore, piston out however completely melted piston around top ring ( you could just get a little pinky round the ring and melted also into centre under crown, molten ally blown all down rod breathing very heavy .
to clear the air tho this was a N/a engine (my old pug 16v )
engine speeds -
virtually tick over, floored from traffic lights forgetting it was armed

 

Use 50 bhp jets and only above 3000 rpm and it will be fine. It will at least double your 'off boost' power and kick the turbo in real quick.
Suggest 100% TPS to trigger on, 10psi+ boost to cut out, a rpm switch such as a shiftlight could be used as a low rpm safety device.

 

Andy,
That's "probably" why it let go
but can't be 100% I did have smaller jets in to start with, just got bored and complacent later on as it's soooooooooooo easy

 

Here's a challenge, would you like me to test it on my car first. It's sat in the workhop doing nothing and the bottle is full (must remember to take out the 150 jet tho )
will be able to test from 19th onward. i have a rr sesion booked on the 19th perhaps i could get a graph done aswell .
Anyone know how much power powerstations rollers take ?? (joke )

 

how about a special NOS ecu map with low advance to allow nos at say 2000rpm and above?



Paul

 

I think the reason 'dry' systems are preferred on ECU controlled cars is so the increased MAF is accounted for in the ignition timing. On the early EFI V8's they triggered the cold start circuit to add extra fuel when the N2O was engaged !

 

either way its no effort to wire it in and plumb it in... if I use it then I use it, if I dont then I dont, it gets sold..

Either way 150bhp on a pug 106 is OTT..

My old 106 xsi (1.4) when I didnt eat gearboxes.. (I can change in under 1/2 hour and if you dont believe me then I have £1000 on me and my mate being quicker than you and yours ) anyway... my 106 1.4xsi was about 138 <--> 146 bhp with silly spec and it wouldnt ever survive nitrous...


What you have to remember is I dont want the nitrous to gain power, just get it earlier... fuzz do you have pics of the pistons..

Why did it leak.. can the solenoids not seal with the pressure??

David

 

ps paul... ill buy the eprom emulator when the car is done and we will have a laugh (leaking n20c ) ie 150bhp...

Wheelspin in what gear...

Seriously though, should be an interesting map!

David

 

Davi, nip down to your library and borrow a copy of David Vizard's Tuning BL's A Series Engine. There's a whole chapter on using nitrous to eliminate lag. 50hp jet should be fine as long as you shut it off early enough when the boost starts to rise. Vizard also mentions feeding the nitrous back it at high rpm once the boost started to drop off.

IIRC, introducing nitrous has several effects in a turbo motor: it cools the intake charge (reduced chance of det), then it increase power (well duh!), then the increase in exhaust gas volume is very large (increases exponentially with rpm, I think) which then causes faster spool up at lower rpm.

You can't lose. Good luck.

 

cheers I might see if I can do that unless someone could scan it in if they have it???

David