Stock M42 With RHD ITBs

[Balleristic31]

Posting this thread because there isn't a ton of data floating out there regarding the power output of a stock M42 with the RHD ITBs. I am going to get the car tuned this weekend (running an ECUMaster EMU Black standalone), and plan to post the dyno results here for posterity. The goal is to get a stock engine running as strong as possible on the new ECU and ITBs, with a plan to plug in a hot stroker M42 that I am building on the side later.

Here is the current setup:
-Stock e30 M42 - Unknown Mileage
-RHD ITBS
-ECUMaster EMU Black Standalone ECU (Alpha-N)
-RHD Lightweight Flyweel
-Clutch Fan Delete
-A/C Delete
-Power Steering Delete
-4 Pintle 19lb stock injectors
-factory headers
-2.5” exhaust, no cat
-Shiny Dinan COPs

Here's a picture of the engine bay with ITBs installed. Please ignore how messy things currently are. Everything will be tidied up once tuning is completed.


Looking forward to the results!

[AWDBOB]

Stoked to see the results!

[uturn]

I'll be waiting on the results... have a m42 that I want to RHD.

[808ETA]

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[av8drvr]

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Same here, would love a full detailed write up on install and driving impressions as well. ITB's are my one dream modification, there is so little information out there on the M42 set up. Thanks in advance.

[82eye]

always thought the m42 should have had itbs out of the box.

[Balleristic31]

Same here, would love a full detailed write up on install and driving impressions as well. ITB's are my one dream modification, there is so little information out there on the M42 set up. Thanks in advance.

I was planning on doing this at some point as well. I needed to work out all the kinks before presenting a comprehensive install write up, but once I am happy with how this is running I will put something together here on R3v.

[av8drvr]

I was planning on doing this at some point as well. I needed to work out all the kinks before presenting a comprehensive install write up, but once I am happy with how this is running I will put something together here on R3v.

Thanks man!

[Balleristic31]

So we made it to the tuner this weekend as expected.

Worked with Atomic Frank out in San Bernardino, CA. Frank works primarily on high HP Honda engines, so I felt his expertise in 4 cylinders and deep experience using ECUMaster ECUs made him the right person for the job.

Conditions:
DynoCom Dyno (similar to DynoJet)
Elevation: ~1,000 ft
Temp: 70F
Humidity 25%
Fuel: 91 Octane

Results:

Run 1:
132.2 WHP at 6525 RPM
116.0 LBFT Torque at 5425 RPM
Average HP: 123.7 WHP
Average Torque (to the crank) 121.9 LBFT
Adjusted Crank HP: 152 BHP
Adjusted Crank Torque: 133.5 LBFT

Run 2:
134.5 WHP at 6525 RPM
116.6 LBFT Torque at 5400 RPM
Average HP: 121.1 WHP
Average Torque (to the crank) 124.4 LBFT
Adjusted Crank HP: 154.6 BHP
Adjusted Crank Torque: 134 LBFT



Overall very happy with the results. Getting close to stock M20 HP numbers, and most stock/chipped M42s that I was seeing online were in the neighborhood of 115-120WHP at best, so it's clear that there was some real improvement with the ITBs and ECU.

Obviously, $/HP here is ridiculous, as I have over $3500 invested in the ITBs and ECU, but that wasn't exactly the point. I will now be putting together a 2.0L+ cammed M42 to really take advantage of the whole setup. Goal with that engine is stock S14 power levels or above, which should be very attainable based on this result.

Hope this is helpful for someone in the future considering these modifications to an M42.

Cheers!

[jsnppp]

Love these numbers and this work. Thanks for posting - perhaps some day I'll get this in my car.

[Karolis]

Hi, have you any dyno run sheet before the itb and ecu?

[bmwman91]

Wow I totally missed this when it was first posted!

Balleristic31 can you post pics of the ITB setup in the engine bay from several angles? I have been considering one but want to get some idea of clearances and how hoses+wiring might need to be rerouted.

[hasa]

Factory headers don't work. We saw 20hp increase with generic eBay headers that had enlarged secondaries. About 175hp from crank, slightly cammed, headers, stock intake.

[Balleristic31]

bmwman91 At some point I will get around to posting detailed pictures. Main thing that gets messy is the vacuum line setup which admittedly on my car currently is a bit of a mess.

hasa That’s really interesting, any chance you have a link to those headers?

[jsnppp]

More info/photos/anything would be awesome.