Top Speed

[NoelWatson]

that's a damn good estimate, the model reports peak power at wheels of 231.69hp @ 7,330 rpm. But that's based on my drive train efficency figure of 80%, meaning 20% losses. I've read others claim only 19%, but I've found 20% gives 0-100kph and 1/4 miles times that match official Honda figures. I have to say ... 230hp at the wheels doesn't strike me as unlikely for a stock NA2.

My engine put out peak power (when measured at the wheels (when standard)) a fair bit past 7000 rpm.

http://www.noelwatson.com/blog/content/binary/SRR-PowerAtWheels1.jpg


Is the gearing exactly 25mph/1000rpm in top?

A question on your model - do you have one for pre and post facelift?

 

[sparky]

is that 233.9 at the wheels, or engine/crankshaft power? and is/was the car standard or "enhanced" ?

looks like the peak is around 7,400rpm

I assume you mean pre/post aero mods? I did model some comparisons of NSX with / without large rear wings like the APR GT300 and GT500. That was an interesting compare, the wings kill top speed big time, from memory around 25mph off!

 

[NoelWatson]

is that 233.9 at the wheels, or engine/crankshaft power?

looks like the peak is around 7,400rpm

I assume you mean pre/post aero mods? I did model some comparisons of NSX with / without large rear wings like the APR GT300 and GT500. That was an interesting compare, the wings kill top speed big time, from memory around 25mph off!

That was at the wheels - peak when on the hub was around 7300 - I guess all dynos are different.

My understanding was that for facelift they cut the Cd from 0.32 to 0.3 - I took the CdA from wiki - 5.74 sq ft (0.533 m2) - when estimating required power - they have a 1991 value of 6.13 sq ft (0.569 m2) - I'm not sure whether it stayed constant until facelift

Agreed on wings/drag killing speed - one example being the Focus RS - Ford claim it will do 163, but the NSXs were around 15mph quicker through the timing beams despite having similar power

 

[sparky]

My understanding was that for facelift they cut the Cd from 0.32 to 0.3 - I took the CdA from wiki - 5.74 sq ft (0.533 m2) - when estimating required power - they have a 1991 value of 6.13 sq ft (0.569 m2) - I'm not sure whether it stayed constant until facelift

yep, I use A = 1.78 sq. m for NA1 and NA2 and the same Cd figures as you quote, and my CdA are almost identical to above (0.570m2 for NA1 and 0.533 for NA2). (Note I prefer metric!)

 

[nsxtasy]

Is the gearing exactly 25mph/1000rpm in top?

You can find the answer for all the gearing setups here, which shows the speed in each gear at redline (8000 RPM).

 

[NSX2398]

You can find the answer for all the gearing setups here, which shows the speed in each gear at redline (8000 RPM).

Ken, I know it's hard to teach an old dog new tricks .. but you've got to stop pointing people to the old FAQ as Lud may just delete it at any time if he wants to reclaim some space. The proper link is found in the Wiki here: http://www.nsxprime.com/wiki/Gear_Ratios

 

[NoelWatson]

Ken, I know it's hard to teach an old dog new tricks .. but you've got to stop pointing people to the old FAQ as Lud may just delete it at any time if he wants to reclaim some space. The proper link is found in the Wiki here: http://www.nsxprime.com/wiki/Gear_Ratios

Thanks. Interesting that SoS have slightly different values

http://scienceofspeed.com/products/drivetrain_performance_products/NSX/NSX_gear_ratios.pdf

This NSX has perfect gearing for the event

http://www.youtube.com/watch?v=OiSzxVpOBOs

 

[nsxtasy]

Ken, I know it's hard to teach an old dog new tricks .. but you've got to stop pointing people to the old FAQ as Lud may just delete it at any time if he wants to reclaim some space. The proper link is found in the Wiki here: http://www.nsxprime.com/wiki/Gear_Ratios

The problem with the Wiki is that the FAQ has a single page table of contents which makes it easy to find items, and the Wiki doesn't. And as long as the information in the old FAQ is still valid (which it is), it provides an accurate answer to the question. If someone - such as Lud or an NSX Wiki Champion - would like to provide a link to a single page table of contents to the Wiki where I can find sections with one click, I'd be happy to use it!

 

[sparky]

Thanks. Interesting that SoS have slightly different values

I assume you mean the JDM 5SP ratios are slightly different to US?
I think Europe 5SP NSX have JDM ratios, same as we have in Australian NSX. But yours is a 6SP anyway ...

edit: I think I just spotted it: SoS show 1st gear as 3.066 instead of 3.071 in a 6SP ... curious. I'm guessing that's a typo, but is the error in Wiki or SoS data?

as an aside I reckon 1st gear is just a bit too short in my NA1 (3.071), maybe they gave it longer legs in the NA2 by dropping ratio to 3.066??

 

[NSX2398]

If someone - such as Lud or an NSX Wiki Champion - would like to provide a link to a single page table of contents to the Wiki where I can find sections with one click, I'd be happy to use it!

Ken, it may not be exactly what you want but there's a partial solution that'ss been there all along. It's just not called TOC .. it's called "All pages" and you can find it here: http://www.nsxprime.com/wiki/Special:Allpages
just type in your search (like "gear ratios") and that page appears. The only problem is that it doesn't display the huge list of all the pages like the TOC does .. assuming you're wanting to use the browser search function. However, if you do an allpages search starting with "a" then you'll get at least half of the Wiki pages displayed and be able to use the browser search from there. If you don't find what you're looking for, page down to the second page and repeat the browser search.

 

[nsxtasy]

If you took all those VINs out of the list (maybe putting them on a sub-list somewhere), it would all fit on one page...

 

[NSX2398]

Ken, you're missing the point .. even if we moved them to a category, they'd still be Wiki pages and therefore show up in the 'all pages' list.
However, I think I've found something even better. Don't mess around with any of the ticked boxes, just put in a search argument (like 'ratios') and do the search.
http://www.nsxprime.com/wiki/Special:Search

Sorry Joe for getting off topic.