Don't clue him in, I wanted to see where this would go. Get me some knowledge.

 

Well duh, so you can be below your power-band after the shift.

 

no...smh, your supposed to use the shift points where you maintain the highest average tq/hp. there is not point reving to 8k if you only making 190hp and 150tq, unless 6.5-8k would yield the highest average power.

this has nothing to do with peak hp

you guys are misinterpreting what im saying.(typing)

 

You used specific rpms based on the dynos presented. You used the peak hp values as shift points. You Wrong, we can read.

 

where did i say shift at peak hp?

 

since you think shifting at redline is best...here you go

http://www.datsuns.com/Tech/whentoshift.htm

this will prove you wrong. and since i know your a troll on this site. this is the last time im replying to you.

 

Sounds like it, probably correct for drag racing but a lot of us drive sports cars. Shifting at optimal RPM is not always that optimal on the roadcourse or autocross.

 

Here. You picked peak as the shift point. Calling someone who has contributed quite a bit of information to this site a troll is in bad taste.

 

I can kinda put the redline shift peak shift thing. Me and a ex employee at CIN bet on this same thing. On CINS dyno you can quarter mile test your car. Really fun when doing before and after mods. Anyways I gave him 3 runs I took one. Beat him every time. Btw I bet your faster at redline over peak drop off

 

You might not have typed the phrase "shift at peak ___," but based on the information presented in the OP and per your recommendation, it certainly reads that way. Clearly, I'm not the only one who read it that way.

And NOBODY even hinted at shifting at redline, so you're putting words into other peoples' mouths/hands -- whatever.


For the record, you want to upshift when the power you put down to the ground in the lower gear becomes less than the power you put down to the ground in the higher gear. Said in another way, the rate of acceleration at the higher rpm in a lower gear is less than the rate of acceleration at a lower rpm in a higher gear. Otherwise, why the hell upshift when you're trying to accelerate as fast as possible? That means you need to take into account not only the shape of the graph and redline, but also gearing.

So, no, you don't always shift right after the peak nor do you always shift right at redline.

Now, I didn't bother reading the article you linked but if it doesn't mention gearing, then you need to find a better source. Eh, but what do I know, right?

 

I always shift at redline at the strip. It's how I got my pb stock time of 13.7 with street tires. Also how I got my best trap of 102.

The kinetix makes more power than the spacer to 7200 RPMs, a lot more. I will be faster with the Kinetix and I'll prove it at the track.

 

Meh.. Motordyne > Kinetix. Do some back to back dynos on the same day on the same car for real comparison.

 

That's retarded. Show me ONE dyno where a motordyne cars power doesn't fall like a rock after redline and I'll be inclined to believe you.

 

Z1 also dyno'd the Kinetix against the spacer and made gains.

 

People just think motordyne is some god made ****. That's why they think it's better.

 

Yeah, on our cars with stock gearing, redline, and power curve, shifting at redline will yield the most favorable result.

13.7 is pretty respectable. Is your time on the Top 25/50 Drag list?

 

No because I did not have stock tires. 60 ft was 1.996

 

Think about this mod with bigger tb and custom I take lime 3-4 inches

 

Here's my .02 with graphs. This is just for curve comparison because these dynos were done a year apart. Once I get a spare plenum so I cut all the posts on the underside off, I'll be retuning it and compare curves. But that may be awhile before I can get that done.

This graph is kinetix V+ plenum with Cobb MAF hose, 3" MAF housing, and JWT pop charger. The curve is pretty smooth all the way to redline. It's not the velocity plenum, but the curve looks pretty similar.


This graph is the MD 1/2" spacer with Cobb hose, 3" MAF, and '06 air box. The curve dives fairly sharp after peak power at 6200. However I did make more power across the RPM with the 1/2" spacer over the V+.

 

Got retuned. The v+ plenum/spacer doesn't hold to 7200 like the Velocity.