Why Dyno my car?

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Mike Langenfeld
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Why Dyno my car?

Post by Mike Langenfeld » Mon Mar 14, 2005 2:51 pm

What exactly is the point of putting my car on a Dyno? I understand it will yeild info on what exactly my car is doing (actual HP at the wheel, flat spots in the performance curve, etc.), but does it provide any tangable benefit for my car? My car has an APR chip with "stock", 93, and 100 octane programs, but to the best of my knowledge it's not tunable beyond the programs provided by APR. So, outside of a mild interest in HP at the wheel what's the advantage of putting the car on the machine?Just curious.

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thewal2
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Re: Why Dyno my car? (Mike Langenfeld)

Post by thewal2 » Mon Mar 14, 2005 3:28 pm

cause it makes you feel cool!

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Jettaprep
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Re: Why Dyno my car? (thewal2)

Post by Jettaprep » Mon Mar 14, 2005 3:39 pm

thewal2 wrote: cause it makes you feel cool!

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FVGNGN 1
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Re: Why Dyno my car? (Mike Langenfeld)

Post by FVGNGN 1 » Mon Mar 14, 2005 4:19 pm

Mike,In your situation I don't know if it makes much more sense beyond giving you a confirming datapoint for the output of your engine. It DOES make sense to make baseline dyno runs and then follow up after mods to verify power gains and while you are at it take a look at any changes to A/F ratio.You will be able to see the true A/F ratio, which in some cases will just confirm that all is right, in other cases might alert someone to the fact that they should take a look at the fuel filter.For a well tuned - stable (as in no recent or upcoming mods) - good running/performing engine you will get some yuks, get to hear it at full song without wind noise muffling it, and get a bragging number to toss out when bench racing.However I will say that it is not REALLY expensive, and is a fun, social event where we get to hang out AND play with cars all at once. In that view I say - why not. It's relatively cheap and if anything did happen to break, much better in a shop than somewhere around Gingerman.

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Mike Langenfeld
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Re: Why Dyno my car? (FVGNGN 1)

Post by Mike Langenfeld » Mon Mar 14, 2005 5:04 pm

Cool,...baseline info could be just the excuse I need to do this thing. Ain't rationalization wonderful.

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Jettaprep
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Re: Why Dyno my car? (Mike Langenfeld)

Post by Jettaprep » Mon Mar 14, 2005 5:52 pm

Mike Langenfeld wrote:Cool,...baseline info could be just the excuse I need to do this thing.
THat is sooooo true...

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vwmann1
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Re: Why Dyno my car? (Jettaprep)

Post by vwmann1 » Tue Mar 15, 2005 6:51 am

Another thought: By looking at where your car is making power you can adjust your shift points for max push.

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Re: Why Dyno my car? (vwmann1)

Post by FVGNGN 1 » Tue Mar 15, 2005 9:44 am

Great point.I have a spreadsheet that I drop the torque curve into, add gear/tire info for final drive calculations and then calculate the effective wheel torqe vs. road speed for each gear. This lets me pick the ideal shift points - shift when the torque in the next gear will be higher than the current, or at max revs - and determine ideal final drive gearing/tire diameter for my weak 8v racer.I will dig it up and attach it here if anyone is interested.

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Re: Why Dyno my car? (FVGNGN 1)

Post by schmuck » Tue Mar 15, 2005 1:39 pm

that sounds like something I would be curious to play with in the future

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Re: Why Dyno my car? (Mike Langenfeld)

Post by Eric Kuhns » Tue Mar 15, 2005 4:24 pm

Mike, you might look at my dyno post in the tech section. My car was feeling fine, but the dyno picked up some subtle issues - hopefully just a plug issue, but there are quite a few things to tune a 1.8T - things like the N75 valve. It may also tip you off to a leaking DV and other issues.

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Mike Langenfeld
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Re: Why Dyno my car? (Eric Kuhns)

Post by Mike Langenfeld » Tue Mar 15, 2005 4:55 pm

Thanks guys. Good info.

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Re: Why Dyno my car? (schmuck)

Post by FVGNGN 1 » Tue Mar 15, 2005 5:52 pm

Well I was going to attach the spreadsheet, but don't seem to be able to......

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Re: Why Dyno my car? (FVGNGN 1)

Post by vwmann1 » Wed Mar 16, 2005 6:54 am

email it to me.....doug@vfc-engineering.comthanks

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Re: Why Dyno my car? (vwmann1)

Post by FVGNGN 1 » Wed Mar 16, 2005 7:42 am

You will get it tonight.

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Re: Why Dyno my car? (FVGNGN 1)

Post by AnalysTT » Thu Mar 17, 2005 7:47 am

So when is our next Dyno Day ? We usually have one around spring time

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Re: Why Dyno my car? (Mike Langenfeld)

Post by sesame_street » Thu Mar 17, 2005 1:33 pm

all good reasons posted above as to why you should dyno your car.i have two more:1) the trophies mang!2) the amount of hp on a dyno sheet, divided by 9, then divided by the number of cylinders, is equal to half the amount one can add to their overall length of manhood. it works!

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Re: Why Dyno my car? (FVGNGN 1)

Post by schmuck » Thu Mar 17, 2005 1:38 pm

when you email it can I get a cc at:dsockrider@yahoo.com

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Re: Why Dyno my car? (sesame_street)

Post by moliver » Thu Mar 17, 2005 3:15 pm

sesame_street wrote:all good reasons posted above as to why you should dyno your car.i have two more:1) the trophies mang!Just what is that trophy supposed to look like? It is very unique...so how much power did you put down and with what kinda engine?2) the amount of hp on a dyno sheet, divided by 9, then divided by the number of cylinders, is equal to half the amount one can add to their overall length of manhood. it works!

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Re: Why Dyno my car? (Mike Langenfeld)

Post by Trevor57 » Fri Mar 18, 2005 10:00 am

From chris

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Re: Why Dyno my car? (moliver)

Post by sesame_street » Mon Mar 21, 2005 1:35 pm

moliver wrote:Just what is that trophy supposed to look like? It is very unique...so how much power did you put down and with what kinda engine?
thats a distributor cap. neat idea, eh.meh! that ol g-60 motor put down 160hp/168tq to the wheels. mind you, this was in 97, we didn't have that many options with ecu tuning. funny, those figures still rank me in the top 20 g-60s on vortex. and there you go, yet another reason to dyno your car mike. you can brag about how 'cool' you are even years after the fact. cheers

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Mike Langenfeld
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Re: Why Dyno my car? (sesame_street)

Post by Mike Langenfeld » Mon Mar 21, 2005 2:55 pm

OK. So there are some good excus,... er,... reasons to dyno the car. Now, where do I take it to have the work done? Yikes, just the Chgo. area shops that can interpret the info. the machine yields in a useful manner.

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Re: Why Dyno my car? (sesame_street)

Post by moliver » Mon Mar 21, 2005 3:11 pm

sesame_street wrote:thats a distributor cap. neat idea, eh.meh! that ol g-60 motor put down 160hp/168tq to the wheels. mind you, this was in 97, we didn't have that many options with ecu tuning. funny, those figures still rank me in the top 20 g-60s on vortex. and there you go, yet another reason to dyno your car mike. you can brag about how 'cool' you are even years after the fact. cheers
I feel pretty dumb now.....I thought it was bigger. I thought it was some funky exhaust or something!! Cute little trophy.


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