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Old 08-27-2012, 09:34 AM   #181
craz azn
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Quote:
Originally Posted by cormier View Post
Ya -- your exhaust sounded dope on the DDT yesterday lol-- sounded more like an m50 than an m20!
No waaaayyyyyyyyy dude, any M5x motor needs a ton of work to sound anything nearly as good as this!!
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Old 08-27-2012, 10:32 AM   #182
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Quote:
Originally Posted by cormier View Post
Ya -- your exhaust sounded dope on the DDT yesterday lol-- sounded more like an m50 than an m20!
Quote:
Originally Posted by craz azn View Post
No waaaayyyyyyyyy dude, any M5x motor needs a ton of work to sound anything nearly as good as this!!
Either way. I appreciate the compliments guys . A lot of people gave me props yesterday for the sound and how quick the car looked on the track, if it wasn't for that I'd be in a pretty shitty mood right now seeing as one of the engine mounts on the front subframe broke while I was lapping but I didn't really notice until I left the track to drive home.

The drive home was a bit of an adventure. A big thanks to Bruno and Ryan for helping me out and hanging with me on the drive home yesterday just in case something happened.

Now whose got a front subframe for me?

Oh, and I'll scan my dyno sheet and post it when I get home this evening
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Old 08-27-2012, 11:31 AM   #183
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I'm just working on pulling the motor from the 320, ill see how the subframe looks and let you know.

Car looked quick and sounded great yesterday, wish I had time for a ride !
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Old 08-28-2012, 08:47 AM   #184
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So those of you who were at Bimmercruise might have noticed that I had my car on the dyno. Here's the plot showing what it put down. I have the rev limiter in the tuning software set to 6600rpm right now however I haven't actually tested it, when I was on the dyno I was lifting around 6000rpm because I knew my peak power would be before then anyway. The car was getting a bit hot on the 2nd and 3rd runs which is probably why I lost some under the curve.



And I roughly calculated what the rpm would be....



Some actual dyno tuning would likely yield some gains and with a bit of work on the intake side of things 200whp seems achievable.
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Old 08-28-2012, 09:06 AM   #185
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Thanks for posting your dyno sheets, man. It's nice to see some honest numbers after a build like this. Gives me a good idea of what I can expect when I tackle my build.
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Old 08-28-2012, 09:49 AM   #186
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that sounds a lot better than before. nice!
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Old 08-28-2012, 11:05 AM   #187
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200 whp is almost in the grasp! Nice work man.
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Old 08-29-2012, 06:42 AM   #188
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Nice dyno dude! 200whp would be sweet.
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Old 08-29-2012, 09:28 AM   #189
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I made a mistake when converting the x-axis to rpm. I was thinking along the lines... well in 4th gear my tach is at this rpm at this speed. However the plot is based on the equation that relates hp and tq, so the lines are supposed to cross at 5252. I updated it, and is definitely more representative of the engine's performance.

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Old 09-03-2012, 04:13 PM   #190
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Oh hello again bottom end old friend?
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Old 09-04-2012, 08:15 AM   #191
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Oh hello again bottom end old friend?
That's what I'll say the next time I drive the car, I'm still working on getting the front subframe fixed. It's been over a week now, I miss my car

...will post pics of beefed up subframe though, should be ready in the next few days.
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Old 09-04-2012, 04:30 PM   #192
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No... what I meant was... is this the motor I sold?
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Old 09-04-2012, 04:33 PM   #193
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No... what I meant was... is this the motor I sold?
LOL, I though you were making a torque joke... this motor was built from Rob's (El Gato Liso) old M20 that he pulled when he did his M50 swap. So unless you sold that motor to him it's not yours
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Old 06-09-2013, 07:52 PM   #194
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So I was at the max dyno day today, although most people didn't see my car run because I ran in the morning when only a few people had shown up. I wanted to see what my stroker would put down on a different dyno.

It's worth mentioning that earlier this year I had the timing belt off to do some work on the front of the motor and when I put it back on I retarded the cam timing by 4 degrees because based on my dyno results last year I felt as though it was a bit too advanced.

In order for you to get a scale of the numbers, there were a couple E46 M3s on the dyno today running in the 285whp range and a couple E39 M5s running in the 315whp range...

First run I ran the timing map I've been running all along, second run I tried adding some timing, third run I tried pulling some timing. Seems as though the timing map I had from the get go was pretty good.



For reference here is last years dyno plot again...



To get a sense of comparison between the shape of the power and torque curves with the advanced and retarded timing I plotted values from both graphs...



The magnitude of the numbers isn't really relevant since they are from two different dynos, but the shape is telling. The horsepower climbs better on the top end and doesn't drop off as drastically, the torque peak is shifted forward, the overall shape of the torque curve is a bit better and it also doesn't drop off as drastically on the top end.

I'm speculating that if I was on the same dyno that I ran on last year, the numbers would look more like this....



But that's just me doing some wishful speculating
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Old 06-10-2013, 03:48 PM   #195
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Thanks for sharing this. Your numbers look good.

I know that the dyno is an inexact science... But are you happy with your numbers? Do you think that it was worth what you have into it or do you wish that you had opted for more? Say punched it out a bit more or went with a hotter cam, etc.
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