Hey guys, so what math would you use to go from a dyno's HP to get crank HP? I would think it would be something like:
(dyno HP) x 1.15 = (crank HP)
So taking for example a stock 95 M3 with a dyno in this thread who put down 209HP, we would get:
209 x 1.15 = 240.35
But I am totally guessing on these numbers. Anybody know the real way to do it? Not sure what the driveline efficiency numbers are for our M's...
tranzlucent
1997 M3 Arctic Silver/Dove
Go: Remus DTM cat-back, Cosmos V2 intake
Turn: GC Coilovers, GC Camber plates, UUC Control Arms, GC RSMs
Play: Alpine HU, CDT components, Alpine amp
BMWCCA Member No. 367956[BR]
It depends on the dyno. I would say for a dynojet a 15% loss is a good guess. For a dynapack I would estimate more like a 20% loss.
Year: 1995
Build Date: 06/95
Mods: ODB-I: TMS Pulley set, TMS Cam Kit (3.5 intake, 24# injectors, 3.5 HFM, software, and Schrick Cams), AA mid section, Stromung Exhaust, UUC LWT Flywheel.
Dyno Type: dyno dynamics
Dyno Conditions: 5/27/06 Noonish
Peak HP: 218.6 (251.3 printed @ 13% adjustment to compare to dynojet)
Peak Torque: 242
I might have a vaccum leak and maybe need a custom tune.
This was my first dyno test ever, and didnt realize i didnt get the RPMs on the chart. so thats why the chart looks weird. i have to get another one with ODB_II exhaust manifolds.
Last edited by deen3; 06-04-2006 at 01:17 PM.
Year: 1996
Motor: Euro 3.2L S52B32
Mods: intake BMC CDA, catback SuperSprint, exhaust Madac
Dyno Type: Rotronic
Dyno Conditions: 94 degrees
Gear Dynoed: 5th
Peak HP: 306cv
Peak Torque: 333.33
Video HERE
Wow is that torque curve flat.
Originally Posted by ///Mr.DRFT
Year: 1995
Build Date: 07/94
Mods: ODB-I: 3.2 swap, custom 3" short ram intake, genie long tube headers, supersprint cat back, custom GIAC software
Dyno Type: Dynojet
Dyno Conditions: 6/07/06 1:15 see chart
Peak HP: 230.24
Peak Torque: 224.28
Dyno'd the car again after the 24# injectors and euro hfm. And today at the dyno shop I realized that my old dyno was in STD correction and not SAE. Which means that I only had 225rwhp and 207rwtq instead of 230 and 212. I realized this after I dyno'd it and put down the exact same numbers (in SAE correction). So basically I gained 5rwhp and the tq basically stayed the same. I'm concerned about the afr since up top it was getting rich, where as 2 months ago it wasn't getting rich up top at all. I tried to change my fuel filter on Thursday, but it turns out that my motorswapped car has retained its 325 fuel filter, since the m3 one was too long to fit in my custom location. Maybe this is the reason?
So is this a fairly average gain for just adding hfm and injectors, considering that I was already running software? I only wish I had more tq.
I'll post the dyno up tomorrow.
These numbers are also not in SAE.Originally Posted by Patrón
'94 325is #94 IP/GTS3 Mauritius Blue Metallic
"And so you touch this limit, something happens and you suddenly can go a little bit further. With your mind power, your determination, your instinct, and the experience as well, you can fly very high." - Ayrton Senna
iateyourcheese
Euro engine ********
So here is my last dyno from Saturday. I really like the way they emailed this to me. Again, you can see how rich it got toward the end.
http://www.dynoperformance.com/dyno_...dynorun_id=994
'94 325is #94 IP/GTS3 Mauritius Blue Metallic
"And so you touch this limit, something happens and you suddenly can go a little bit further. With your mind power, your determination, your instinct, and the experience as well, you can fly very high." - Ayrton Senna
1995 M3
77k on motor
VF Charger kit
AA mid section
293 WHP
246 Tq
Year: 1995
Build Date: 1/95
Mods: See sig.
Dyno Type: Dynojet
Dyno Conditions: Late June Cali
Gear Dynoed: 4th
Peak HP: 229 SAE
Peak Torque: 211 SAE
I'm dissapointed. I figred the OBDI 3.2L would get more than ~10-15hp, assuming the intake/manifold setup is ~15hp.
Ideas?
95 M3: OBDI 3.2L, M50 IM, 3.5" HFM, Custom Mpact Motorsports Race Intake,
Custom Tune, GC Track School Kit, 18" RD RG-S', 5% Tint
whp: 229 | wtor: 211
Screw rich! Look how lean you are in lower RPMs. I would be careful with that mixture.Originally Posted by 94is
"We are the music makers...and we are the dreamers of dreams."
I totally agree. My roomate had similar AFRs on his supercharged Nissan maximum and his car was pinging like crazy down low. He recently blew the headgasket because it was running so lean. I would get a retune if I were you, 94is.Originally Posted by ///M3///M5
R.I.P.
95 Daytona Violet TURBO M3/2
Dove Alcantara/ Dark Grey Leather
Here is my dyno chart from yest...
I think its a little on the lean side what do you guys think?
and what can I do to richen it up a bit?
I was thinking 24# injectors
2015 E84 X1 35i ///M +JB4
__________________________________________________ __________________________________________________ _____________________________
RIP --- 98 ///M3 Mods:- Eurosport TS - (EVO)Euro 6-speed
How do you know that your injectors were maxed out? I'm about to put in a AA chip with stock injectors and 3.5" HFM. I hope to dyno it ASAP to make sure I'm not leaning out too bad.Originally Posted by 1bad m3
Dakar 95 M3 (4/95 manufacture)
Techno Violet 97 M3 (12/96 manufacture)
Alpine White 16 535i M-Sport (10/15 manufacture)
_________________________________
"I have no idols. I admire work, dedication and competence." -- A. Senna
Illegitimus Non Tatum Carborundum
Yeah, I've been trying to get ahold of Drew from TMS. I don't know if they can adjust it tho. I was thinking that my afr may have something to do with my fuel filter needing to be changed.Originally Posted by ///M3///M5
'94 325is #94 IP/GTS3 Mauritius Blue Metallic
"And so you touch this limit, something happens and you suddenly can go a little bit further. With your mind power, your determination, your instinct, and the experience as well, you can fly very high." - Ayrton Senna
dynoed my '94 euro M3 today on dyno dynamics (conservative), motor is stock internally, has exhaust mods, UUC 8.5Lb flywheel, chip and CAI
cheers, Alan
1/4 mile-12.92 @ 108.64mph-NA 3.0L m3 daily driver
How can you tell if your injectors are maxxed out form a dyno plot?
Dakar 95 M3 (4/95 manufacture)
Techno Violet 97 M3 (12/96 manufacture)
Alpine White 16 535i M-Sport (10/15 manufacture)
_________________________________
"I have no idols. I admire work, dedication and competence." -- A. Senna
Illegitimus Non Tatum Carborundum
By looking at the A/F ratio.Originally Posted by Casebrius
Year: 1997
Make: BMW
Model: M3
Color: Hellrot Red
Transmission: 5 speed manual
Body: Coupe
Motor: U.S. 3.2L S52 (stock)
Mods:
- ECIS cold-air intake system
- Stromung cat-back exhaust
- UUC underdrive pulleys (water pump, power steering pump)
- stock headers coated inside,out
- NO SHARK INJECTOR
Year: 1999
Build Date: 03/99
Mods: Simota CAI, Dinan stage 2 software, Dinan exhaust
Dyno Type: Dynojet
Dyno Conditions: 92-93 degrees, 14% humidity. Around 90-100 all day.
Gear Dynoed: 3rd or 4th (will edit when I find out)
Peak HP: 209.86 rwhp
Peak Torque: 213.84 rwtq
I was a little disappointed, but people say this is what healthy '99 M3's put out with what I have done to it. Will try again after a couple other mods and in lower temps.
95 m3 with Dinan S/C kit, Dinan exhaust, Schrick Cams.
Max Power: 296
Max Torque: 246.76
~Sirrelix
1995 M3
09/95
AA Intake, 540i AFM, AA Injectors/Software, Sunbelt Cams, Shorty Headers, AA Track Pipe, AA Gen 3 Exhaust,
Dyno Jet
94.42 F, 30.22 in-Hg, Humidity: 21%, STD: 1.02
4th Gear
Peak HP: 237.61
Peak Torque: 210.90
I installed the cams after I got the software.
looks like its running lean
Last edited by UltimateM; 07-22-2006 at 02:14 PM.
Wow, I just bought my HFM and 24#injectors. I'm waiting on my chip... But these numbers are really dissapointing.
What would be the 1/4 mile difference between a stock M3 200rwhp and one with these mods 220hp?
Also, for those of you with 24# injectors, how is your fuel consumption?
fuel consumption seems fine. The injectors have a higher flow capacity but they are tuned correctly so they don't necessarily use more fuel. The Jim C chip does get rich up top, though.Originally Posted by Crazy 13immer
-Dave
Bookmarks