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Technical Discuss different strategies and theories of the racing aspect. |
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09-12-2006, 12:17 AM | #1 | |
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Compression and Nitrous
I've been looking into nitrous lately... just reading up really. I had this question: Say you had an NA car and wanted to run a crazy 200+ shot of nitrous... theoritically the engine would combust/detonate much like a Turbo/Supercharged engine, right?
So I'm thinking you would have to lower the compression of the engine?
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09-12-2006, 05:19 PM | #2 | |
The Red Baron
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Re: Compression and Nitrous
It would be a good idea.
N2O works by chemically separating the oxygen from the nitrogen. Since there is more oxygen you can add more fuel and thus a bigger boom. Just like with a turbo or super you will be risking detonation the more N2O you run on high compression. If you want to run a 200 shot I would lower the compression to between 8:1 and 9:1 for a street car. |
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09-13-2006, 12:49 PM | #3 | |
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Re: Compression and Nitrous
How do you think the lower compression would affect an NA though... on a street car application?
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1990 Z32 2+2 BLITZ SUS Intake, HKS ALC My 1994 TT Supra For Sale: http://www.automotiveforums.com/vbul...d.php?t=623105 |
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09-13-2006, 01:20 PM | #4 | |
The Red Baron
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Re: Compression and Nitrous
Without the N2O the engine wouldn't be as responsive and you would lose some power.
Just as long as you don't go crazy with the amount you run you shouldn't really need to lower the CR. |
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09-14-2006, 11:11 AM | #5 | |
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Re: Compression and Nitrous
What's considered crazy?
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09-14-2006, 01:42 PM | #6 | |
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Re: Compression and Nitrous
depends on the car. i wouldnt spray your vg30de with more than a 100 shot, and thats pushing it on 92 octane IMHO
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09-14-2006, 04:54 PM | #7 | ||
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Re: Compression and Nitrous
Quote:
As me and Polygon were discussing... I'm wondering what he would consider a "crazy" shot of nitrous without lowering compression.
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1990 Z32 2+2 BLITZ SUS Intake, HKS ALC My 1994 TT Supra For Sale: http://www.automotiveforums.com/vbul...d.php?t=623105 |
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09-30-2006, 04:35 PM | #8 | |
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Re: Compression and Nitrous
317419023874908274980237409172340 shot. that would really blow the welds on the intake.... id say maybe 150 about.
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11-20-2006, 07:17 PM | #9 | ||
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Re: Compression and Nitrous
Quote:
More power also means more heat, this can overheat pistons, valves, spark plugs and similar if they aren't modified. The cooling provided by the nitrous can prevent overheating somewhat, it can also decrease the risk for detonations. But in order to keep temperatures, cylinder pressures and detonations under control a rich fuel mixture combined with ignition retard is usually required. In extreme cases the compression ratio may need to be reduced, an option to that is to use water injection. |
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11-20-2006, 10:20 PM | #10 | |
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Re: Compression and Nitrous
this was like from 3 months ago or so. it was kind of a F & F joke. you'll aslo fry the piston rings.
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07-10-2008, 01:04 AM | #11 | |
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Re: Compression and Nitrous
also wouldnt hurt to add a n2o cam to help with the engine performance when not using n2o, and to optimize the nitrous when in use. buying a cam would be overkill on a 150 shot though...
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