Dyno Shootout: Battle between Dinan and RD Sport for 4.6 Liter Stroker Motor Braggin

[redline9001]

Great post, well documented test

[sterile stork]

Oh man, amazing collection of data! Thank you for adding to the community and going through all the work to present it!

[s65e90]

Originally Posted by dtmwerksm3

Agreed, why anyone would shell out 30k+ for an extra 20-30hp is beyond me, unless they like flushing money down the toilet. Get some Turner Test Pipes and a ESS Tune and you're already beyond the output of a stroker, throw a ESS supercharger in the mix and you're still at half the cost and twice the output.

Stroker Kits

not really; not just about peak hp and tq figures. A bigger displacement motor is gonna feel like a diff car down low.

[AW M3]

i'm a non-gearhead, so this is an honest question. Why would anyone get a stroker?? Is the difference really worth 30k?? As I said, seriously asking.

[s65e90]

Originally Posted by AW M3

i'm a non-gearhead, so this is an honest question. Why would anyone get a stroker?? Is the difference really worth 30k?? As I said, seriously asking.

here's a little quick reading in simple terms::




http://www.badasscars.com/index.cfm/...d=90/prd90.htm

[AW M3]

Originally Posted by s65e90

here's a little quick reading in simple terms::




http://www.badasscars.com/index.cfm/...d=90/prd90.htm

Ok thanks, I follow that. I guess I was just expecting a little more. Perhaps it takes experiencing the cars in person to really appreciate them.

[okusa]

30hp for $30k = $1,000/1hp.

Hmmm...baller status vs financial ass raping. I'll keep my cash and hope the Gintani twin turbo kit is the real deal: http://www.m3post.com/forums/showthread.php?t=849889

[RBB]

Cool thread. I'm severely underwhelmed by those dyno #'s on the strokers, though. You'd have to be crazy to spend $30K for one of those. Just supercharge it and call it a day.

[Longboarder]

Originally Posted by s65e90

not really; not just about peak hp and tq figures. A bigger displacement motor is gonna feel like a diff car down low.

But on the track it's all about peak power since you are living at 5,000 - 8,400 RPM. And the Dinan stroker doesn't make much more than a simple exhaust/tune M3 up top. Something has to be wrong. It doesn't make any sense.

As an example, my car did 365 RWHP (only 19 HP less than the Dinan stroker) bone stock with 300 miles on the ODO on the EAS dynojet.

[MisterEm]

Wow. Great data. Thank you for sharing.

EDIT: Timing and spark advance on the Dinan is conservative, as expected. As mentioned earlier, the throttle is not wide-open at redline for the Dinan either. With a more aggressive tune, where would the Dinan be?

[kwike92]

money vs power?..


ill bolt up an ess kit and call it a day.


howevever, i do love the stroker... just not the price tag.

[sebaflex]

well it looks about right.. the cars being tested are stock, except for the stroked bottom end.

Look at the M3 GTS... its a 4.4L stroker and rated at 450hp... just ~30hp away from a stock M3.

I bet there is more power to be had with some cams & head work.

[Mmmdreamer]

Bolt on an SC and FTW. I'm v v shocked by those numbers though...guess I should be happy with my $1500 bucks spent on Tune and Test Pipes =)

[okusa]

The only thing all this data proves to me is what a fantastic job the BMW engineers did with the stock S65.

[FormulaMMM]

Originally Posted by sebaflex

Look at the M3 GTS... its a 4.4L stroker and rated at 450hp... just ~30hp away from a stock M3.

Dinan claims 502 hp.

So the reason for the underwhelming performance is the tune? ~$30k engine builds lack proper tune? I don't even..

[lsmkr01]

Considering all the cars were running full Akra evo exhaust systems how much of the gain actually came just from the stroker???

[wheatpaste]

Neglecting cost, I don't really understand how you come to the conclusion that the Limerock/GTS beats the Dinan stroker.

Yes, the GTS makes marginally more peak horsepower, but the Dinan stroker makes 20-30 WHP more than the GTS everywhere from 3500-6500 RPM. That is a pretty significant advantage, even if the Dinan has some software issues hampering the results.

Is the Dinan a good value as tested? Doesn't look like it, but I wouldn't say that the Limerock/GTS beats it from a performance standpoint. I'd be curious to see 60-130 MPH comparisons between the two.

[positiveions]

Originally Posted by img

Good thing cause i was planing on getting a stroker + Ess kit !
Good work Aleks !

That would make endless power from low to high RPM; a constant power that will never have a hiccup.

[Sal@AUTOcouture]

"Price as tested: don't even ask"

[Detroit M3]

this thread has troll written all over it... i dont know much about strokers but what I do know is for 30k I would hand half of that to ess and the other half to acm and come out gunning. Gunning for higher than a gain of 12 whp that is.

[Alex07M3]

Originally Posted by lsmkr01

Considering all the cars were running full Akra evo exhaust systems how much of the gain actually came just from the stroker???

+1 !!

[Alex07M3]

Originally Posted by Detroit M3

this thread has troll written all over it... i dont know much about strokers but what I do know is for 30k I would hand half of that to ess and the other half to acm and come out gunning. Gunning for higher than a gain of 12 whp that is.