11:1 compression + nitrous?

BLU BY U · 06-02-2006, 02:07 PM

How would a high compression motor like the si's respond to a 50 shot of nitrous? I was under the impression that high comp motors love nitrous.

talk to me.

Conrad · 06-02-2006, 02:27 PM

could probably go all day long on just a 50 shot...

larryd · 06-02-2006, 03:49 PM

I ran a 50 shot on my Celica GT-S which was 11.5:1 compression and it ran fine.

Nafunu32 · 06-03-2006, 12:29 AM

Compression has nothing to do with nitrous from what I've been told. Asked the question "will 11:1 compression be bad with nitrous" answer "compression has nothing to do with running nitrous"

BLU BY U · 06-03-2006, 07:47 AM

Quote:

Originally Posted by Nafunu32

Compression has nothing to do with nitrous from what I've been told. Asked the question "will 11:1 compression be bad with nitrous" answer "compression has nothing to do with running nitrous"

Thanks for the answer, i wasn;t sure how compression affected nitrous or vice versa.

**twistedframe** · 06-03-2006, 08:21 AM

well compression does have an effect on the safety of nitrous. Nitrous is a power adder just like a turbo or supercharger. In an engine that already runs higher compression it can get dangerous to run high power adders without beffing up the internals of the engine. With a 50 shot you won't have to worry, but if you start going bigger you will at least need to get some kind of fuel management system to make sure your car doesn't start going dangerously lean. Honda blocks are alot stouter than most people want to admit so up to about a 150 won't hurt you as long as you can keep enough fuel in there. Just like a turbo running 10psi won't hurt you as long as you keep enough fuel in going to the motor. Hope this helps.

Nafunu32 · 06-03-2006, 08:50 PM

Right... but a 9:1 compression honda motor will blow on a 75 shot as easily as a 11:1... thats what a well known performance shop told me.

**twistedframe** · 06-04-2006, 12:33 AM

well no stock honda motor made in the last 10years will blow on a 75 shot whether it had 11:1 or 5:1 compression. And I'm pretty sure they are mistaken, but i will back up my argument when i find an old article i have about nitrous.

Tikolx333 · 06-04-2006, 12:58 AM

Quote:

Originally Posted by twistedframe

well compression does have an effect on the safety of nitrous. Nitrous is a power adder just like a turbo or supercharger. In an engine that already runs higher compression it can get dangerous to run high power adders without beffing up the internals of the engine. With a 50 shot you won't have to worry, but if you start going bigger you will at least need to get some kind of fuel management system to make sure your car doesn't start going dangerously lean. Honda blocks are alot stouter than most people want to admit so up to about a 150 won't hurt you as long as you can keep enough fuel in there. Just like a turbo running 10psi won't hurt you as long as you keep enough fuel in going to the motor. Hope this helps.

How does this apply to the R18?

Nafunu32 · 06-04-2006, 01:36 AM

Quote:

Originally Posted by twistedframe

well no stock honda motor made in the last 10years will blow on a 75 shot whether it had 11:1 or 5:1 compression. And I'm pretty sure they are mistaken, but i will back up my argument when i find an old article i have about nitrous.

You totally missed my point... I was proving that compression will not affect the nitrous.

**twistedframe** · 06-04-2006, 02:10 AM

here is some info I found with some FAQs about nitrous. http://www.nitrousdirect.com/faq.html

I'll highlight the ones i feel pertain to this thread.

Quote:

6. Can I use Nitrous Oxide on a stock engine?

A: Yes. The most important aspect is not to overindulge. Choosing the correct kit for any given application is essential; a good rule of thumb to follow is never exceed 50% power increase to your current engine output.

9. Does nitrous oxide cause detonation?

A: Not directly. Detonation can be the result of many things, such as a lean condition caused by not adding enough fuel, too low of an octane of fuel, and too much ignition advance.

15. Can you apply Nitrous Oxide to high compression engines?

A: Absolutely. High compression ratios work well with nitrous oxide provided the proper balance of nitrous and fuel enrichment is maintained. Generally, the higher the compression ratio, the more ignition retard, as well as higher octane fuel, is required.

So there is a difference running nitrous on a high compression engine vs. a lower compression engine.

BLU BY U · 06-04-2006, 09:29 AM

Quote:

Originally Posted by twistedframe

here is some info I found with some FAQs about nitrous. http://www.nitrousdirect.com/faq.html

I'll highlight the ones i feel pertain to this thread.

So there is a difference running nitrous on a high compression engine vs. a lower compression engine.

see i knew it would be sifferent, sounds like you could get a lean condition easier.

Rocklobsta1109 · 06-09-2006, 03:31 AM

you could go lean alot easier, notice it said retard igniton and higher octane fuel. All nitrous is, in a simplistic way, is super consentrated oxygen. the more o2 in your cylinders, the higer the compression. too much and it will blow just like over boosting a turbo car. In that sense high compression may not be ideal for larger shots of nitorus where too much ignition timing has to be pulled or fuel has reached its limit. In terms of smaller,50-75 shots, I think you'd be good to go

06-02-2006, 02:07 PM	#1 (permalink)
BLU BY U Senior Member Join Date: Apr 2006 Age: 24 Posts: 7,585 iTrader: 2 / 100%	11:1 compression + nitrous? How would a high compression motor like the si's respond to a 50 shot of nitrous? I was under the impression that high comp motors love nitrous. talk to me.

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06-02-2006, 02:27 PM	#2 (permalink)
Conrad Senior Member Join Date: Apr 2006 Posts: 155 iTrader: 3 / 100%	could probably go all day long on just a 50 shot...

06-02-2006, 03:49 PM	#3 (permalink)
larryd Senior Member Join Date: Mar 2006 Location: Delaware Posts: 1,809 iTrader: 2 / 100%	I ran a 50 shot on my Celica GT-S which was 11.5:1 compression and it ran fine.

06-03-2006, 12:29 AM	#4 (permalink)
Nafunu32 Senior Member Join Date: Mar 2006 Posts: 181 iTrader: 0 / 0%	Compression has nothing to do with nitrous from what I've been told. Asked the question "will 11:1 compression be bad with nitrous" answer "compression has nothing to do with running nitrous"

06-03-2006, 08:50 PM	#7 (permalink)
Nafunu32 Senior Member Join Date: Mar 2006 Posts: 181 iTrader: 0 / 0%	Right... but a 9:1 compression honda motor will blow on a 75 shot as easily as a 11:1... thats what a well known performance shop told me.

06-09-2006, 03:31 AM	#13 (permalink)
Rocklobsta1109 Junior Member Join Date: Jun 2006 Posts: 4 iTrader: 0 / 0%	you could go lean alot easier, notice it said retard igniton and higher octane fuel. All nitrous is, in a simplistic way, is super consentrated oxygen. the more o2 in your cylinders, the higer the compression. too much and it will blow just like over boosting a turbo car. In that sense high compression may not be ideal for larger shots of nitorus where too much ignition timing has to be pulled or fuel has reached its limit. In terms of smaller,50-75 shots, I think you'd be good to go