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I am scared to go to low of a gear while roll racing so I don't crack my retainers. And yes in the Si shifting to 4th gear going 50-60mph you are right around 6k rpm's.
The S2K feels way faster than my Si did, but I am just struggling to figure out the gearing it seems like it takes an ETERNITY to get to 6000-8000 range.
I do know a bolt on and tuned Si will be a struggle for me especially from a roll because the K-Series are beast with bolt on's. Ideally i'd love to have a K20/K24 hybrid build swap into the S2000 (don't hate on me too much).
Retainers don't crack until about 10,000+RPM.
You can replace them if you're worried...rather than worrying.
The S2000 and 06-11 Si gearing is very similar.
Neither car is anywhere near 6K RPM in 4th.
At ~8400RPM, either car is doing about 85MPH in 3rd. Yes? Yes.
Meaning 3rd gear in either car is about 6K RPM near 60MPH.
4th gear is at 6.2K RPM around 85ishMPH in either car.
You're over thinking it. Both cars have roughly the same gearing...but very different torque curves.
From a performance perspective related to acceleration focus more on your tachometer and less on your speedometer. In a nutshell you'll want to run through the gears while keeping your engine spinning in the upper third of it's RPM range. You should be able to feel this by the seat of your pants. But honestly if straight line performance is your primary objective then there are countless options preferable to a S2000. These cars weren't really intended to be enjoyed in a straight line. Maybe even consider getting yourself a motorcycle where you'll get far more performance for the money spent. I've got what is largely considered to be an "old man's bike" (in my case that's actually quite fitting). It's a Honda CB1100, a modern retro bike with an air-cooled engine. It was designed with more leisurely oriented riding in mind rather than performance riding. I love this motorcycle but like the S2000, I was not drawn to this bike with straight line acceleration in mind. The CB1100 is actually considered to be a slow bike by today's standards yet in published tests it still managed 0-60 mph in 3.3 seconds and ran the 1/4 mile in 11.79 seconds. Not too bad for a motorcycle that you can now pick up used for around $5K.
Last edited by GuthNW; 02-10-2019 at 12:55 PM.
Reason: Added context
After lowing my VTEC to 3600 I had to install a red line alarm as things started happening so much faster outside the car that there was no time to keep an eye on the tach. The car really revs fast. Loud alarm tells me I gotta shift or the rev limiter will cut the fuel.
AP2 transmission 3d gear and speedo are a pretty close match and the AP1 is similar. Gear shifts eat time, there's a reason automatics these days are faster than stick shifts. Don't start an "event" like this below 60mph if you want to stay in VTEC and then use 3d gear. Or start well below 60 at (say) 45 or 50 in 2d gear again with the revs above 6000 so you're on the high power cam. (The benefits of a lower VTEC engagement should be obvious by this time. Depends what it's worth to you in terms of dollars. )
Work down the pattern to get to a lower gear. Skipping gears seems to be one of the ways guys get 2d rather than 4th especially when down shifting.
I came across this on the google machine, (but there is a better one out there):
AP1:
Maximum speed in first gear: 43.3 mph
Maximum speed in second gear: 66.3 mph
Maximum speed in third gear: 91.6 mph
Maximum speed in fourth gear: 116.8 mph
Maximum speed in fifth gear: 139.8 mph
Maximum speed in sixth gear:167.5 mph
AP2:
Maximum speed in first gear:39.1 mph
Maximum speed in second gear: 60 mph
Maximum speed in third gear: 82.8 mph
Maximum speed in fourth gear: 105.6 mph
Maximum speed in fifth gear: 130.1 mph
Maximum speed in sixth gear: 160.7 mph
After lowing my VTEC to 3600 I had to install a red line alarm as things started happening so much faster outside the car that there was no time to keep an eye on the tach.
I was referring to the OP and the OP's car when it comes to watching the tachometer to get a feel for things. After enough time behind the wheel (as MrFunk suggests) he'll likely get a better sense of how this all plays out just by instinct while listening to the engine working. That comes with a bit of time and and soon enough there is no longer any need to feel like you are continuously needing to stare at the gauges. I'd suggest that the OP take the time to really get to know how his car responds at various RPM levels across the rev range in each gear before worrying about making any changes to it. The only reason I personally could imagine wanting to change the point of engagement for VTEC is if the impact of the engagement were so abrupt that it was messing with the car's traction & handling (as with any user input that's too abrupt). I'm good with the stock VTEC engagement on my '05 model. I'd guess that engaging VTEC as low as 3600 RPM is introducing some stresses on the engine it wasn't designed to take over the long haul.
I know the S2000 wasnt meant to be a straight line performer but I guess I expected better. But now looking at the numbers it all makes sense.
S2k - 2800lbs
Si - 2900lbs
S2k - 237hp (bolt ons ant tune 245hp?)
Si - 197hp (bolt ons and tune 240hp?)
torque is about equal
S2k - rwd, better for launching
Si - fwd, better for roll racing
So theoretically an 8th gen Si with bolt ons and a tune will be equal to a stock S2000 or outperform in straight line speeds from a roll.
But no way in hell should a 160hp EP3 Si be able to beat me even from a roll, a EP3 Type-R will 100% beat me.
My pride was hurt I am trying to find the guy and explain why he pulled on me was I shifted to 4th gear going 55mph now he thinks his Si can beat S2K's.
02-10-2019, 11:56 AM
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I've had both a 07 & 13 Si and no way at 50-60mph in 4th are you tacking 6k with stock gearing.
