Yep, that's right. After speaking my mind at every opportunity telling you how it should be done, I put my money where my mouth is :-)

I've purchased a Dynapack chassis dyno, which is quite a bit different than what most of you are accustomed to (and more expensive too unfortunately). In essence, a Dynapack allows you extreme flexibility including steady state rpm tuning, as well as timed acceleration runs (x rpm to y rpm in z seconds - all user specifiable). Also nice is that you actually bolt the units to the axles, so wheel weight, tire pressure/wear, etc. don't play a role. This unit is particularly useful for tuning engine control systems, fuel computers, etc. because you can do real time feedback. I can't wait to see what a VAFC, or my Zdyne CRX looks like on this thing.

The Dynapack is also portable, but I haven't purchased a truck yet. Perhaps later this year I can stop by an event or two. Other features include a wideband O2, boost/vacuum sensor, and I have an OBDII reader/datalogger to pull useful data like water temp and intake temp.

I'm located in Torrance (20950 Normandie Ave, Unit K). We've just set up the shop, phone should be up next week. For now, you can just PM me here.

cthree and I have already discussed a dyno day for S2Ki members. A portion of the proceeds will go to support S2Ki (we're talking about 20% or so).

The dyno arrives the first week of July. Anyone interested in a dyno day in late July? Saturday or Sunday is best of course. cthree and I thought $40 for 3-4 runs was fair. $8/person will go to S2Ki. If we have time, a second session on the dyno would be an additional $20 (in case someone wanted to swap a part). Any weekend after July 7th should be good. I was thinking July 20th. The only stipulation I put on cthree is that we'd need at least 12 people, no more than 20.

Post here if you're interested!

UL

 

Wow! That sounds like a serious piece of equipment!
I'm down for $40, just to see if my s2k is pulling what it is supposed to. The 20th might be difficult for me, but I won't know for a week.

 

HEY!

I live right next to Torrance!! Alright finally I have a place to dyno my car for a damn good price may i add. Well anyways yeah im looking to dyno my car perhaps sometime next month or so and will definitely swing by your place then.

chris

 

Cool UL, so you finally bought it. I'm down for coming down and seeing what my stock S2K can pull.

 

Hey, all right - locals! :-)

Be sure to come out for the dyno day, as it won't be quite that cheap for a couple of runs normally. The dyno day price is a benefit of being an S2Ki member.

And yep, finally bought it Mark. The big decision was dynojet vs. dynapack. In the end, it was just too hard to find space for an above ground dynojet (28' long, 10' wide, 6' tall) so I spent the extra $$ on the dynapack, but I think its going to work out well because I can do a lot more stuff with the dynapack.

Oh, and I guess I won't be able to hide behind the alias anymore. Especially since my last name is in the title of the business :-)

UL

[QUOTE]Originally posted by aznpooky
[B]HEY!

I live right next to Torrance!!

 

UL, How do the readings from this dynopack compare to the dynojet? The reason I ask is the Vortech thread where a different brand dyno gives very different results. Also, add me to the list.

 

Good question. The answer is, it depends :-).

You see, we can set up the dynapack to do almost any sort of test we want. If we do a steady state rpm test (i.e. hold the engine at 6000 rpm), the hp is likely to read a bit lower until you stabilize the heat, etc. However, if we do an inertia simulation run, the hp can read very close to that of a dynojet. The real determinant is the duration of the rpm sweep during the inertia run.

For example, if you test your car in 4th gear on the dynojet, you probably start your run from about 2500-3000 rpm and go to 9000 rpm. This probably takes 8-10 seconds on average. If we tell the dynapack to sweep from 2500-9000 rpm in 10 seconds, we should get a reading very close to that of a dynojet. If anything, it might be a little higher because we don't have to spin up the heavy wheels and tires. As a reference, I will take my S2K to a dynojet when I get the dynapack in so we have some comparison data.

Now, here's the really neat part. Let's say that you know how long it takes to traverse each gear during a full throttle acceleration run. 1st gear takes 3 seconds, 2nd gear takes 3 seconds, 3rd takes 4.5 seconds, etc. We can actually tell the dynapack to simulate the real world loading. It will accelerate teh engine from your launch rpm to redline in the amount of time you actually spend in 1st gear. Then it can test from 5800 rpm to redline for the 2nd gear span. So you can really see how the engine performs when loaded like it is in the real world. All the tests are actually made in one gear (4th gear for the S2K most likely), but gear ratio really doesn't matter in engine peformance, its the overall load. Lower gears can have somewhat higher power losses, especailly from heavy flywheels, etc., but that doesnt' reflect engine performance.

Anyways, short technical discussion over for now. Keep the questions coming. And it looks liek we've already got about 4 people.

sideways (definite)
marks2k (definite)
aznpooky (maybe)
djqube (maybe)

UL

[QUOTE]Originally posted by Sideways
[B]UL,

 

Am I going to have to drive down to LA?

 

I`ll throw my HB on for chits n giggles

Congrats, Shawn.

Ryan

 

Hey Ryan, glad to have you. And thanks :-)

Are you running a Hondata on your hatch? It would be cool to demonstrate to people how a real programmable ECU works - and hopefully give people a taste of what's to come for our S2Ks in the future. I'm thinking about throwing my Zdyne CRX on as a demo too.

UL or SC ;-)