And a 75 shot would put about as much HP to the wheels as a S/C'd car so why would it make one look like it's standing still?
Can we spell E-M-B-E-L-L-I-S-H-M-E-N-T?
Oh, and has he checked his valves and plug tips to see if they're "well done" yet?

 

If find it difficult to ignore stupid posts, so please pardon me for this post.

A 75 shot of nitrous will add 75 HP to the crank HP. Assuming there is any compression left in the motor, that puts your brother at 315. Figuring an average of 17% parasitic drivetrain loss (assuming the clutch drops haven't worn the shit out of it), that leaves WHP at about 261.45. If I am planting 303 to the wheels right now, what in the world makes you think your brother's car would leave me like I am standing still?

-YS

 

>>>If find it difficult to ignore stupid posts, so please pardon me for this post.<<<

Why is is stupid?

>>>A 75 shot of nitrous will add 75 HP to the crank HP. Assuming there is any compression left in the motor, that puts your brother at 315. Figuring an average of 17% parasitic drivetrain loss (assuming the clutch drops haven't worn the shit out of it), that leaves WHP at about 261.45. If I am planting 303 to the wheels right now, what in the world makes you think your brother's car would leave me like I am standing still? <<<

A 75 shot can easily be faster than a 100 RWHP SC gain cuz the 75 HP is there at ALL RPMs.

What is the AVERAGE HP gain of the SC mod across 6-9000 Rs?

Stan

 

>>>A 75 shot can easily be faster than a 100 RWHP SC gain cuz the 75 HP is there at ALL RPMs. What is the AVERAGE HP gain of the SC mod across 6-9000 Rs?<<<

Answering my own question...

According to the Comptech site, their kit puts out an average of 41 extra HP between 6-7000. And 58 RWHP average gain from 7-8000. Finally an average of 84 extra RWHP is found from 8-9. Overall, it acts like an average gain of 61 RWHP.

It puts out 90% of the peak gain in RWHP ABOVE 8600 RPMs. Peakey!!! In the VTEC range it puts out 90% or more of the peak gain in torque from 8500-8900. And 80% or more of the peak gain in torque from 8100-8900. More or less it's a killer for only the last 1000 RPMs.

A 75 RWHP Nitrous kit is likely to do just fine! 75 at all times, and no heat soak issues. A good install is needed though.

Stan

 

Ouch...that burns a little...can't wait for the rebuttle.

By the way NICE thread!!!

 

Stan-

If we stick with the 17% parasitic drivetrain loss, that puts the gain at 62.25 HP across the RPM band.

Using my stock dyno run and a fairly current dyno run's data (see http://www.kpj.com/S2000/Dyno.xls for the details), at 7300 RPMs, my HP exceeds that of the car spraying.

If you know how to drive and shift an S2000, the only time you will be below 7300 RPMs is in 1st gear acceleration - after that, running to 9000 RPMs and shifting efficiently, your RPMs will never drop down below that point.

So, the car that is spraying may pull on the SC'd car up to 7300 RPMs in first gear, but after that, the SC'd car *should* reel him back in. This of course assumes that the spraying car is spraying immediately and not delaying until some set RPM mark (say 3000). It also assumes that they can spray at WOT for the length of the race.

I think that it would make for an interesting race, but in no way would a spraying car "walk" a supercharged car.

-YS

 

>>>If we stick with the 17% parasitic drivetrain loss, that puts the gain at 62.25 HP across the RPM band. <<<

It depends on what you call a 75 shot...Nitrous Express give that to ya at the wheels.

>>>Using my stock dyno run and a fairly current dyno run's data (see http://www.kpj.com/S2000/Dyno.xls for the details), at 7300 RPMs, my HP exceeds that of the car spraying.

>>>If you know how to drive and shift an S2000, the only time you will be below 7300 RPMs is in 1st gear acceleration - after that, running to 9000 RPMs and shifting efficiently, your RPMs will never drop down below that point. So, the car that is spraying may pull on the SC'd car up to 7300 RPMs in first gear, but after that, the SC'd car *should* reel him back in. This of course assumes that the spraying car is spraying immediately and not delaying until some set RPM mark (say 3000). It also assumes that they can spray at WOT for the length of the race.
I think that it would make for an interesting race, but in no way would a spraying car "walk" a supercharged car.<<<

You're saying that the S2000 never drops below 7300 RPMs after 1st gear? I'll have to look up the gear charts but that is news to me. Let's check it out!!

Stan

 

I wrote: >>>You're saying that the S2000 never drops below 7300 RPMs after 1st gear? I'll have to look up the gear charts but that is news to me. Let's check it out!!<<<

A quick search pulls up the max speed in each gear in MPH.

1-43
2-65
3-91
4-116
5-140
6-166

It appears that you're always >7300 RPMs after shifting premise may be incorrect. Using simple math, if the abovenoted chart is correct and you shift perfectly each time right at the 9200 RPM fuel cut, your upshift RPM won't be 7300 RPMS or greater until you shift into 5th at 116 MPH.

Questions, comments, smart remarks...

Stan

 

Stan-

You are correct in your math. Based on those speeds, the result RPMs would be as follows:

1-2 ~6000 RPMs
2-3 ~6400 RPMs
3-4 ~7000 RPMs
4-5 ~7450 RPMs

At each of those points, this is my HP delta over stock:

6000 +48
6400 +44
7000 +56
7450 +66

Do you not agree that those numbers are close enough, when combined with what happens after 7450, to say that a NOS car wouldn't "walk" a supercharged car?

-YS

 

Simple math? I'd like to know what the simple math is. I don't even know where to start!

On a side note.
I'll tell you what, both cars would be superfast, not to mention a hoot more fun to drive, than my current one.