2008 Dinan Stroker M5 versus 2009 Cadillac CTS-V - Page 10 - BMW M5 Forum and M6 Forums
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post #91 of 101 Old 4th March 2009, 04:41 PM
Tom C
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Quote:
Originally Posted by M V10 View Post
The most annoying thing is when people ALWAYS mention the god damn money..."this cost only this and that and gives you this much"...pathetic! Personally, I don´t care if the tune costs 10 dollars or 10.000 dollars, you race what you got!
+1 If going fast for the least of amount of money spent was the end-all-be-all of our existence...we would all be driving hopped up Fox body Mustangs or worse...a Honda Civic...

Tom
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post #92 of 101 Old 5th March 2009, 02:55 AM
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Originally Posted by darren_dallas View Post
Holy smokes...I don't check this thread for a day or so and when I come back it's gone nuts.

Folks, let me reiterate a few points once again:

1. Nobody is saying this was a "fair" comparison (stock versus modded setup)
2. I'm not looking for "easy" prey and picking on stock cars to slap around
3. This impromptu comparison was done very ad-hoc immediately after our dynos to validate or invalidate my dyno numbers because they are perplexing

Can we get off the topic of "a chevy/gm can be modded for $5 and pull out 100 rwhp" discussion. We all know this folks. I personally know Fubar will go and have his car modded by this coming weekend probably and bring an entirely new game face to the car meet next weekend and possibly show me a thing or two.

I'm not sure why, but whenever runs like this are posted the three most common comments are:

1. Congratulations to the winning car
2. How the losing car cannot be compared to the winning car because it was half price of the winning car + mods
3. For $5000 the losing car will be made into a NHRA drag qualifying funny car

Somehow this thread, which was meant to focus on the confusion and inadequacy of dynos for the stroker, turned into a pissing match and immature behaviour. I'm even amazed at how people from the same marque are getting shots in on each other and becoming defensive, rather than supportive.

Is this what the M5board has turned in to?

Always a gentleman... I do not plan on modding the CTS for a few weeks at least. I want to get the 5000 mile break-in put to bed. However, I would like to run again soon. Hopefully with a little more experience under my belt I will be able to manage the transmission better.

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post #93 of 101 Old 5th March 2009, 02:58 AM
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Originally Posted by Fubar View Post
Always a gentleman... I do not plan on modding the CTS for a few weeks at least. I want to get the 5000 mile break-in put to bed. However, I would like to run again soon. Hopefully with a little more experience under my belt I will be able to manage the transmission better.

It would also be nice to see you run against a stock M5 (if such a thing exists in DFW).

2006 M5--Sapphire black/sepang
Dinan: free flow exhaust, Stage 3 engine software, high flow throttle bodies, high flow air mass meter/intake Assemblies, stage 2 suspension, 13% underdrive crankshaft pulley, 5.8 liter stroker engine, Dinan middle exhaust section, custom headers (I think I am finally done)

2011 Space Gray ZCP E92 M3; two-toned black and red interior; Dinan 4.6 liter stroker engine, intake, exhaust, midsection, pulley, and throttle bodies.
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post #94 of 101 Old 5th March 2009, 04:00 PM
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Call me crazy (or for this matter... anything else if you would like) but I think vbox 60-130mph times and 1/4 mile track times are both relevant in testing the performance of cars.

The 60-130mph times are a great simulation of a highway roll-on. It is more precise given that it takes away the advantage of someone who jumps/better reaction time and for the most part isolates the car against the clock.

The 1/4 mile track times are a great simulation for the old stoplight drag. This would heavily rely on traction and skill getting off the line. But it is also great for demonstrating the impact of torque (provided you have enough traction). The 1/4 mile trap speed also will show you how much power a car is putting down.

Here is my prediction.... Stroker M5 will run a lower ET on drag radials than the ASR NOS M5...but the ASR NOS M5 will trap higher. ET is primarily a function of the launch...and the ASR M5 is not hitting the bottle until it is down the track.

Tom

Last edited by Tom C; 5th March 2009 at 04:01 PM.
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post #95 of 101 Old 5th March 2009, 05:55 PM
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This thread reminds me of this video:



I will leave it to your distinguished folks to say who plays who. Maybe you guys want to put some skin in the game?
$80 damnnnnn, put it all on the line

"Men wanted for hazardous journey. Small wages. Bitter cold. Long months of winter. Constant danger. Safe return doubtful. Honour and recognition in case of success." - Ernest Shackleton, Ad in London newspaper 1913 for south pole expedition.
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post #96 of 101 Old 7th March 2009, 02:42 PM
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RaceMX-M3, please let the ASR vs Stroker discussion go: we've been there already and it is going nowhere.
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post #97 of 101 Old 8th March 2009, 01:31 AM
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My guess is your car wasn't measured properly on the dyno. If you have a Dinan stroker engine rated at something over 600 hp, then you should be putting at least 500 horsepower to the wheels. That would be the number that would explain the video results.

Mike
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post #98 of 101 Old 8th March 2009, 03:24 AM
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Agreed dynos does not makes sense but mostly real world tests do.

Quote:
Originally Posted by darren_dallas View Post
Gabe,

Thanks man! Yes I do have numbers for stock cars and my modded 2006 Silver Grey M5 all on the exact same dyno:

418 rwhp: Stock M5
454 rwhp: Dinan modded Sepang Bronze M5 (software, diff, throttle bodies, intake)
455 rwhp: 2006 Silver Grey M5 (my previous fully modded M5)
457 rwhp: 2008 Dinan Stroked M5 (mine)
466 rwhp: 2008 Dinan Stroked M5 (mine)

So as you can see it makes no sense. I obviously have way more than 11 rwhp compared to even my previous 2006 Silver Grey M5 and way more than 456 rwhp which I dyno'd Saturday along with the CTS-V.

You just cannot compare dynos, even from the same manufacturer, at different locations. In addition, I guess you need decent airflow for my stroker setup to show it's true numbers.

If my setup is predicated on using larger intakes, MAFs, throttle bodies, and displacement to make power, then it would stand to reason I need better airflow to see the true numbers on a dyno. Just my speculation.

Regards,

Darren
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post #99 of 101 Old 8th March 2009, 03:27 AM
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I beleive it was vs the 545i?

Quote:
Originally Posted by Kelster View Post
I'd be interested in learning the source of that information, 'cause intuitively it doesn't make sense to me. For the purposes of a 'quick and dirty' analysis, consider consider each motor to be the equivalent of a 5 liter positive displacement air pump. The delta in airflow pumping capacity would then be the difference in the volume of air moved at the 8200 rpm red line of the S85 and the 7200 rpm red line of the S62. That works out to about 14% if I've done the math correctly
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post #100 of 101 Old 8th March 2009, 03:36 AM
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Thread cleaned up.

Posts must be on topic and factualr or they will be deleted.


Quote:
Originally Posted by darren_dallas View Post
Holy smokes...I don't check this thread for a day or so and when I come back it's gone nuts.

Folks, let me reiterate a few points once again:

1. Nobody is saying this was a "fair" comparison (stock versus modded setup)
2. I'm not looking for "easy" prey and picking on stock cars to slap around
3. This impromptu comparison was done very ad-hoc immediately after our dynos to validate or invalidate my dyno numbers because they are perplexing

Can we get off the topic of "a chevy/gm can be modded for $5 and pull out 100 rwhp" discussion. We all know this folks. I personally know Fubar will go and have his car modded by this coming weekend probably and bring an entirely new game face to the car meet next weekend and possibly show me a thing or two.

I'm not sure why, but whenever runs like this are posted the three most common comments are:

1. Congratulations to the winning car
2. How the losing car cannot be compared to the winning car because it was half price of the winning car + mods
3. For $5000 the losing car will be made into a NHRA drag qualifying funny car

Somehow this thread, which was meant to focus on the confusion and inadequacy of dynos for the stroker, turned into a pissing match and immature behaviour. I'm even amazed at how people from the same marque are getting shots in on each other and becoming defensive, rather than supportive.

Is this what the M5board has turned in to?

Last edited by Gustav; 8th March 2009 at 03:39 AM.
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