Don't do it. I have done back to back test at the strip testing each technique and you gain HARDLY any time and put tons of abuse on your car. You wear out the clutch, tranny, etc. All you do is shift really, you do it fast enough, you won't hit the dangerous rpms. With that said, don't do it. Some of your hardcore drag fans think that it picks them up "so much" time. That are complete idiots, so just let them think that. For big turbo cars, this might have some gain, but for a tiny K03 that can reach full boost @ 2500rpm in 5th gear(meaning it spools quickly), you will gain nothing but abuse.

 

My friends has the Srt-4 with the Stage 1 enhancement.

One of the selling point is the WOT shifting.
The ECU matches the RPMs during the shift like a computerized RPM matching. So, when he shifts he doesn't lose any additional RPMs caused by driver error, and his car continues to hold boost.

Isn't this what a Sequential Shifter does?

How the hell can his car do this?
Why can't we do this to our Passats?

 

That is not at all what a squential shifter is/does.

Sounds hokey. A vehicle with a traditional manual transmission cannot shift under load with the tranny connected to the engine. You don't lose boost because of the RPM drop, you lose it because of the load drop. The only way to shift without losing load is something non-tradition like a VW DSG (which may not even work that way, but you'd need something with that type of functionality in the tranny). Even if you powershift a traditional manual you will lose some load. Where did your friend hear about this? Link?

 

Maybe something like this would net you the same result:

http://www.rallycars.com/Cars/bangbang.html

 

He has done it.
He lets the clutch out to shift quickly, but his foot remains on the pedal floored.
According to him, the ECU seems to be RPM matching and will not allow the RPMs to exceed a certain RPM (RPM limiter even lower during WOT shifting than stand RPM limiter) to prevent the RPM spike that would happen if you did push in the clutch with WOT.

This is where my confusion is. Why wouldn't it rev up if you put in the clutch at WOT. Is the ECU that smart to know that both the clutch has been engaged and the throttle is at WOT. If it is an ECU calculation why can't we program our ECU. Of course, it would probably have to be only the DBW cars.

And why doesn't reingaging the clutch at WOT cause some extreme stress or overheating on the clutch. Is it because the ECU is matching the RPMs?

Here is the MOPAR link to what the Stage 1 does.
http://www.mopar.com/perf_srt_turbo.html
Regardless the kit is awesome.

I haven't found an indepth discussion on WOT shifting, but here is the website and forum on the SRT-4.
http://www.srtforums.com/forums/sho...ad.php?s=b9c9741ff66289c802cf5c4752d92bdd&threadid=6491&perpage=15&pagenumber=2

 

Well, there is a feature of some engine management solution that will hold the throttle open and use fuel/timing tricks to control RPM. This is how "launch control" systems work. Could be that. It doesn't require DBW because you hold your foot to the floor when the system is engaged. This feature has been available in the Subaru WRX community for some time but few people use it because it tends to make things break very quickly for a modest decrease in ET. It's mainly popular among the rally racers where the low traction available prevents any serious damage. I read the post on that forum and most of the people there clearly don't understand how the kit works. The link for the mopar kit isn't any more helpful. I really don't think you should lose any sleep over this. Just shift quickly, until you're into the big turbo arena you don't need to worry about it. Your car would be a lot more expensive to fix than a neon were you to bend a rod or strip a gear by using something like this - although it's moot since there's nothing available for your car that would provide this ability. I think you are considerably overestimating how much of a performance difference something like this would make. To answer the question about causing extreme stress- it DOES.

 

He doesn't agree about the strain.
I am pretty much quoting him with my responses.
I agree that it is minimal time savings, but it should chew your clutch up.
I know my clutch wouldn't take one power shift before being destroyed.

Thanks for information. He just has to brag how fast his car is. Care to race him Mac. :wink: He will be at California Motor Speedway hitting the 1/4 mile this weekend.

 

Sure, It's only a 400 mile trip!

He can brag because his car is quick.. the SRT-4s have some major scoot in perfect conditions in a straight line with the right tires. Unfortunately I don't spend much time driving in perfect conditions in a straight line with the right tires, so I bought something more versatile.

 

By the way, what ever happened to keeping your warranty with those mopar upgrades? According to that site I guess they couldn't make good on that promise.

Mopar Performance Parts are sold "as is," without any warranty whatsoever. Implied warranties, including warranties of merchantability or fitness for a particular purpose, are excluded. The entire risk as to quality and performance of such parts is with the buyer. Should such parts prove defective following their purchase, the buyer and not the manufacturer, distributor or retailer, assumes the entire cost of all necessary servicing or repair.

Chrysler, Dodge, and Jeep® vehicle and parts warranties are voided if the vehicle or parts are used for competition or if they fail as a result of modification.