its about nitrous again...

[truckinwagen]

I have a problem, I have found several incredible deals on dry nitrous kits, and am having a hard time convincing myself not to get one.

I can afford it at the moment, but really shouldn't spend the cash right now.

help me out, convince me(one way or the other)

-Owen

[calebessent]

On your G60 1.6? So, you've got a supercharger, meth injection, and you want nitrous, too?

I vote "do it," because I want to see it done. Those of us that don't own a decent garage have to live vicarously through you other builders.

On the other hand, I know you'll be wishing you hadn't when you need money for something later.

[truckinwagen]

yeah, cost is an issue, but I am funding my projects with parts sold from parting other cars, so...(and the kit is $250 shipped)
as for the garage thing, this car sits in a parking lot that has a very strict "no working on your cars" policy, so all work done on it is either with a careful eye on the landlords parking spot, or at borrowed garages on weekends.

yes this is the supercharged 1.6, and would only be for when I want to get really stupid.
the water/meth is for intercooling, as I don't have underhood space for a good intercooler.

the point of my build is for raw power without waiting for it, so it is hard to turn down nitrous at such a good price.

Grrrr.... all I am doing is making myself want it more!

-Owen

[8v-of-fury]

Dear Owen,

Get it and be happy. You want it bad enough to make a post about not wanting it

DOO ITT

[truckinwagen]

yeah, I probably will.

just need a few sales to go through so my paypal balance gets high enough to purchase.
my wife says that if I can buy things with paypal money from selling parts then its cool.

as far as filling the bottle, I will probably give myself a limit to how many times I can refill, like once a month or something.

-Owen

[maxfax]

You don't need nitrous..



But it'd sure be fun!! 

[macka]

nitrous would be awesome for more charge cooling 

[truckinwagen]

nitrous would be awesome for more charge cooling 

yep, that was my first thought, but it is kinda expensive for long term use for cooling the intake
it will do a great job for heavy acceleration.

I was thinking of starting with a little jet, like a 20 or so, and go as high as a 50 jet.

-Owen

[RadoTD]

You don't need nitrous.

IIRC, you've been planning on twin charging it all along? Keep going with that.
With an appropriate turbo charger selection and a well thought out design, you'll be able to push the limits of what your rods and head can take without the bottle.

If it were some 6L monster pushing 80psi and revving all the way to 3500rpm, it might make sense, but you should be able to pump enough air to get your engine boosting like hell

That being said, it would add to an awesome build 

[truckinwagen]

yeah, for what I would put into the nitrous I could get ahold of a holset H1C and manifold, which might be a better use of the cash.

if I do that, I really need a good intercooler between the turbo and supercharger though, which is going to take some coin. if I could get someone to take the one I have off my hands, I would have some scrilla to play with on an intercooler, but until then...

the other question is this:
too much boost(and subsequent power) has been shown to deform the head and cause headgasket failure on these motors
it seems that 200HP(and the boost to support it) is about the limit of the head.

nitrous requires much less volume to generate power, so do you think that one could make more power with nitrous than boost? as the cylinder pressures would be less(from a smaller volume of intake charge being compressed by the piston)

or would the peak power potential be the same with N2O as boost?(ignoring the fact that the bottle only lasts so long)

-Owen

[RadoTD]

I see what you're saying about the NOS having greater power potential. I wonder how significant that would be?

Completely simplified, power output is the average force on the pistons/head. Without dropping compression or retarding timing, it seems to me that regardless of your charge air mass and therefore pre ignition pressure,  the force on the pistons will be the same throughout the stroke and therefore peak pressure on the head would be the same for the power. I suppose less parasitic loss from compressing the charge air? Not sure how much of a difference it would be though.

It's too bad we can't toss our compression ratio and timing around as easily as the gassers!

[truckinwagen]

yeah, you are probably right...

alright, so now about turbos.

I need some input.
the maps and math that I have done suggests that a holset H1C from a 6L dodge wold be a good fit(very similar to the HX35)

I can get one for cheap, but I can also get an H1C from a cummins 4BTA which has a smaller compressor/different exhaust housing
I cant find a map for the 4BTA turbo, but it is designed for a 4L motor spinning at 3000-ish RPM, while the standard H1C is designed for a 6.5L motor spinning about the same speed.

any thoughts?

[NintendoKD]

WHOAH! those snails are HUGE!!!   how are you going to fit it under the hood?  plus, when you do it, I want a ride

[truckinwagen]

yeah, they are big.
I would probably have to modify a stock toilet bowl manifold to fit them and ditch the gasser manifold.
I cant hang the turbo from the exhaust mani, as it would interfere with the rear motor mount. and the MK2 T3 turbo manifold, which puts the turbo directly behind the mani, would put it into the firewall.

so the logical thought is to mount it on top, like the stock TD turbo manifold does, but that interferes with the intake.

oh well, I should probably wait to get too wrapped up in the particulars of mounting until I get the turbo in my hands.

I just want to make sure I can spool the bastard before I buy it, I cant return them if they don't work out the way I want.

-Owen

[NintendoKD]

modify the hood and use a mkIV style intake, that comes up and overtop of the motor, hmmm........ Idea