B58 Doc Race Turbo Kit Build Progress

kern417 · 08-23-2021, 02:05 PM

Quote:

Originally Posted by M140_BCS

Sounds awesome!

Could the B58 Doc Race kit be modified to fit a RHD 440i.

Custom made downpipe?

I don't know

kern417 · 09-11-2021, 01:43 PM

Behind the scenes, I have done some testing with upgraded HPFPs. My latest video discusses my findings and I get on the dyno to test them back to back.

J3Vr6 · 09-14-2021, 11:44 AM

Nice video! Man, would love to see you do a dynamic run with just 93 octane, no E85, and see what numbers you'd get on your Doc Race and Dorcsh Stage 2. If you did 630 with E, what do you think you would have done on just 93 octane?

kern417 · 09-14-2021, 11:51 AM

Quote:

Originally Posted by J3Vr6

Nice video! Man, would love to see you do a dynamic run with just 93 octane, no E85, and see what numbers you'd get on your Doc Race and Dorcsh Stage 2. If you did 630 with E, what do you think you would have done on just 93 octane?

I wouldn't expect more than 500-550 with just 93 octane. We did that tuning with the TU pump and hit the octane limits pretty easily. There's no benefit to adding a Dorch Stage 2 if you're just running pump gas with this size turbo.

J3Vr6 · 09-15-2021, 08:58 AM

Quote:

Originally Posted by kern417

I wouldn't expect more than 500-550 with just 93 octane. We did that tuning with the TU pump and hit the octane limits pretty easily. There's no benefit to adding a Dorch Stage 2 if you're just running pump gas with this size turbo.

I know you said in another video that you should have gotten the 9174; how do you think 9174 would do with just 93 Octane and Dorsch Stage 2? (I'm always going to get the Dorsch Stage 2, regardless of turbo platform, for future proofing).

kern417 · 09-15-2021, 12:10 PM

Quote:

Originally Posted by J3Vr6

I know you said in another video that you should have gotten the 9174; how do you think 9174 would do with just 93 Octane and Dorsch Stage 2? (I'm always going to get the Dorsch Stage 2, regardless of turbo platform, for future proofing).

It might make an extra 50ish hp.

sultan340 · 09-15-2021, 06:28 PM

Quote:

Originally Posted by kern417

I wouldn't expect more than 500-550 with just 93 octane. We did that tuning with the TU pump and hit the octane limits pretty easily. There's no benefit to adding a Dorch Stage 2 if you're just running pump gas with this size turbo.

Good video again kern417.
You're right on this, i did the pure800 + DE stage 1 upgrade lately and we found that we engine is already begging for more octane when running only 93 oct pump (520 whp on dynojet, 21-22 psi max). Adding a gallon E cleared all minor corrections. Since i'm staying at this power level for reliability sake, i'll just add some CP meth/water to get the octane up a little + cooling.

cxmplex · 09-19-2021, 01:52 PM

Ahh man that's awesome! Looks too hard for me, but that sounds great.

M140_BCS · 10-19-2021, 02:41 PM

Doc Race kit installed on a RHD B58!

kern417 · 01-18-2022, 06:12 AM

Hey guys, going to be posting more dragy data and races soon. To start off, here is my best dragy time from when I had the TU pump.

kern417 · 02-14-2022, 12:16 PM

Added 1-year review and race vs ZL1 to the Original Post

talontdone · 02-24-2022, 01:49 AM

Quote:

Originally Posted by sultan340

Good video again kern417.
You're right on this, i did the pure800 + DE stage 1 upgrade lately and we found that we engine is already begging for more octane when running only 93 oct pump (520 whp on dynojet, 21-22 psi max). Adding a gallon E cleared all minor corrections. Since i'm staying at this power level for reliability sake, i'll just add some CP meth/water to get the octane up a little + cooling.

Did you add a WMI kit? With my VTT GC and a BMS wmi kit I made 510 whp 570wtq on 93 octane...

sultan340 · 02-24-2022, 01:51 AM

Quote:

Originally Posted by talontdone

Quote:

Originally Posted by sultan340

Good video again kern417.
You're right on this, i did the pure800 + DE stage 1 upgrade lately and we found that we engine is already begging for more octane when running only 93 oct pump (520 whp on dynojet, 21-22 psi max). Adding a gallon E cleared all minor corrections. Since i'm staying at this power level for reliability sake, i'll just add some CP meth/water to get the octane up a little + cooling.

Did you add a WMI kit? With my VTT GC and a BMS wmi kit I made 510 whp 570wtq on 93 octane...

Nope, no wmi whatsoever, only 93 pump and some ethanol.

talontdone · 02-24-2022, 02:06 AM

Quote:

Originally Posted by sultan340

Nope, no wmi whatsoever, only 93 pump and some ethanol.

That's impressive!

kern417 · 04-05-2022, 08:29 AM

Race vs C63S

Greg555 · 01-10-2024, 04:57 PM

I CANNOT RECOMMEND DOC RACE TO ANYONE

ZERO STARS.

Kevin - kern417 was great at helping me and answering my questions but I will not buy anytihng from DOC or cannot recomment it to anyone

Heres why

I bought a 340i

car was a REPO and someone stole the turbo.
Car had the same kit as Kevin

Im thinking
OK no big deal I can buy a new EFR and I did

Problems start is when you try to source a wastegate bracket and linkage

DOC did not answer my emails (multiple), FB messages or calls in 2 weeks

I have his headers and a downpipe still in the car so I can bolt the new turbo and be all set but he doesnt care as Im not spending $6K plus on a new kit

I basically have to develop the bracket from scratch and hope it works.

Not impressed with his support.

09-14-2021, 11:44 AM	#47
J3Vr6 Private 11 Rep 75 Posts Drives: 2016 BMW 340i (RWD) Join Date: Feb 2019 Location: Florida iTrader: (0)	Nice video! Man, would love to see you do a dynamic run with just 93 octane, no E85, and see what numbers you'd get on your Doc Race and Dorcsh Stage 2. If you did 630 with E, what do you think you would have done on just 93 octane?
	Appreciate 0 Quote

09-19-2021, 01:52 PM	#52
cxmplex Private First Class 44 Rep 91 Posts Drives: 2018 340i GT Join Date: Oct 2020 Location: Boston iTrader: (0)	Ahh man that's awesome! Looks too hard for me, but that sounds great. __________________ 2018 BMW 340i GT \| BMS Intake \| Autowerke Catted DP \| MHD E40 Mix Stage 2+ Tune \| FX-150 HPFP
	Appreciate 0 Quote

10-19-2021, 02:41 PM	#53
M140_BCS Lieutenant 238 Rep 413 Posts Drives: 440i Gran Coupe Join Date: Dec 2019 Location: UK iTrader: (0)	Doc Race kit installed on a RHD B58! Attached Images __________________ 2017 440i F36 - Drexler LSD - B58TU HPFP - MHD Stage 2 - xHP - 200 Cell DP - MPE
	Appreciate 1 kern4174445.00 Quote

01-10-2024, 04:57 PM	#60
Greg555 Enlisted Member 45 Rep 41 Posts Drives: many Join Date: May 2018 Location: Chicago iTrader: (0)	I CANNOT RECOMMEND DOC RACE TO ANYONE ZERO STARS. Kevin - kern417 was great at helping me and answering my questions but I will not buy anytihng from DOC or cannot recomment it to anyone Heres why I bought a 340i car was a REPO and someone stole the turbo. Car had the same kit as Kevin Im thinking OK no big deal I can buy a new EFR and I did Problems start is when you try to source a wastegate bracket and linkage DOC did not answer my emails (multiple), FB messages or calls in 2 weeks I have his headers and a downpipe still in the car so I can bolt the new turbo and be all set but he doesnt care as Im not spending $6K plus on a new kit I basically have to develop the bracket from scratch and hope it works. Not impressed with his support.
	Appreciate 0 Quote