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Showing results 1 to 25 of 100 Search: Posts Made By: jrobohm
Forum: Infiniti Q50 Q60 VR30DDTT 10-22-2020, 09:11 AM
Replies: 10
Views: 160
Posted By jrobohm
Watch out for MMT based Octane Boosters - while...

Watch out for MMT based Octane Boosters - while very effective - they leave orange deposits in the combustion chamber and should be used sparingly IMHO.
Forum: Infiniti Q50 Q60 VR30DDTT 10-21-2020, 06:29 AM
Replies: 1
Views: 57
Posted By jrobohm
Be careful with running E-content - I ran an...

Be careful with running E-content - I ran an E20-30 fuel blend for over a year and while it did seem to run well - I did lose all 6 fuel injectors (however to say that E fuel content above E10 (pump...
Forum: Infiniti Q50 Q60 VR30DDTT 10-10-2020, 01:59 PM
Replies: 10
Views: 160
Posted By jrobohm
IF in doubt about fuel - burn it up with some...

IF in doubt about fuel - burn it up with some Sunday highway driving and fill up with gas from a reliable station.
Forum: Infiniti Q50 Q60 VR30DDTT 09-30-2020, 10:28 AM
Replies: 5,743
Views: 722,104
Posted By jrobohm
On the JB4 (IOS) application - it is under User...

On the JB4 (IOS) application - it is under User Adjustment Settings - Options (just below Future Use A) - Bits - flip Bit0 On (Green). Be sure to save your configuration and go back to double check...
Forum: Infiniti Q50 Q60 VR30DDTT 09-30-2020, 08:34 AM
Replies: 500
Views: 28,284
Posted By jrobohm
Typically the WMI Kit for the VR30 comes with BM5...

Typically the WMI Kit for the VR30 comes with BM5 nozzles. The reason I was asking is your AFR numbers are a bit rich and perhaps a smaller nozzle might lean those numbers out - assuming the Fuel...
Forum: Infiniti Q50 Q60 VR30DDTT 09-30-2020, 08:29 AM
Replies: 5,743
Views: 722,104
Posted By jrobohm
Fuel Wires - Check 1st post in this thread. ;) ...

Fuel Wires - Check 1st post in this thread. ;)

Optional fuel control wires:

Dyno Test: N54Tech.com - International Turbo Racing Discussion - View Single Post - Infiniti Q50 3.0t VR30DDTT Red...
Forum: Infiniti Q50 Q60 VR30DDTT 09-27-2020, 04:44 PM
Replies: 500
Views: 28,284
Posted By jrobohm
Looks like 91 fuel is hurting your timing a bit...

Looks like 91 fuel is hurting your timing a bit (dips below 5 degrees a bit.) You’re running a bit rich on AFR too - are you running BM5 nozzles ?
Forum: Infiniti Q50 Q60 VR30DDTT 09-26-2020, 12:40 PM
Replies: 500
Views: 28,284
Posted By jrobohm
These are some short pulls - would be easier to...

These are some short pulls - would be easier to see how it is dialed in with some highway on-ramp pulls from 3rd to 4th. The WMI does appear to be engaging and dropping your IAT numbers!
Forum: Infiniti Q50 Q60 VR30DDTT 08-10-2020, 05:01 PM
Replies: 500
Views: 28,284
Posted By jrobohm
I believe a PM5 (315cc) would be something like...

I believe a PM5 (315cc) would be something like the BM5's. With the PM3.5's - I am still getting the cooling IAT drop while getting more gas vs WM. Before my fuel system upgrade - I was up to PM8's...
Forum: Infiniti Q50 Q60 VR30DDTT 08-10-2020, 03:44 PM
Replies: 500
Views: 28,284
Posted By jrobohm
Quick update - I swapped out my BM7's for PM3.5's...

Quick update - I swapped out my BM7's for PM3.5's this afternoon - thus reducing the effective flow rate from 440cc x2 to 220cc x2. The car felt great and IAT's dropped as usual (currently 99F in...
Forum: Infiniti Q50 Q60 VR30DDTT 08-07-2020, 03:11 PM
Replies: 0
Views: 205
Posted By jrobohm
AMS Performance and Nostrum's Take on the VR30 Stock Injector TSB

Very interesting write up. It also makes sense why AMS has posted on their store Left and Right VR30 Injector Rails.

Infiniti VR30 Injector Failures - Investigation and Solutions -...
Forum: Infiniti Q50 Q60 VR30DDTT 08-03-2020, 07:24 PM
Replies: 500
Views: 28,284
Posted By jrobohm
Upgrading the HPFP is what pushed the “have to”...

Upgrading the HPFP is what pushed the “have to” button on the EcuTek tune. The stock tune doesn’t play well with the upgrade - stock injectors as well?!?

Car drove good before and a bit better...
Forum: Infiniti Q50 Q60 VR30DDTT 08-01-2020, 08:28 PM
Replies: 500
Views: 28,284
Posted By jrobohm
Before my fuel system upgrade I was maxing out my...

Before my fuel system upgrade I was maxing out my trims with a Meth Add at 75 (I was also running back then a E30’ish fuel blend.) I upgraded my nozzles all the way to ProMeth (PM8’s) and trims were...
Forum: Infiniti Q50 Q60 VR30DDTT 07-31-2020, 07:50 AM
Replies: 500
Views: 28,284
Posted By jrobohm
Are you using Boost Juice or something else? Your...

Are you using Boost Juice or something else? Your AFR numbers are in the low-mid 12's here and there - getting a bit lean. Boost Juice is a 49 Meth / 51 water mix. It might be interesting to see what...
Forum: Infiniti Q50 Q60 VR30DDTT 07-30-2020, 06:10 AM
Replies: 500
Views: 28,284
Posted By jrobohm
It looks like all three logs are Map 6 As I...

It looks like all three logs are Map 6

As I remember, when you see Trims at 44 - that's maxed out.

Also, keep an eye on Ign_1 numbers - except for gear shifting, it is not a good sign when your...
Forum: Infiniti Q50 Q60 VR30DDTT 07-29-2020, 04:40 PM
Replies: 500
Views: 28,284
Posted By jrobohm
With a E30’ish Fuel Blend - but before I upgraded...

With a E30’ish Fuel Blend - but before I upgraded my fuel pumps - I was maxing out my fuel trims. By moving to BM7’s and even to PM8’s I was able to get some fuel trim relief. After my injector...
Forum: Infiniti Q50 Q60 VR30DDTT 07-27-2020, 06:55 AM
Replies: 500
Views: 28,284
Posted By jrobohm
Looking at this Map 7 log - it appears your Meth...

Looking at this Map 7 log - it appears your Meth Add is at 40. That roughly equates to a + 4.0psi number. As you have a Silver Sport - you should be able to handle more boost, especially with the...
Forum: Infiniti Q50 Q60 VR30DDTT 07-25-2020, 12:28 PM
Replies: 500
Views: 28,284
Posted By jrobohm
You can see the WMI effect on the IAT temps when...

You can see the WMI effect on the IAT temps when it is spraying :)

How does it feel?
Forum: Infiniti Q50 Q60 VR30DDTT 07-25-2020, 12:24 PM
Replies: 500
Views: 28,284
Posted By jrobohm
FYI - Purge only works on Map 7

FYI - Purge only works on Map 7
Forum: Infiniti Q50 Q60 VR30DDTT 07-24-2020, 08:02 AM
Replies: 500
Views: 28,284
Posted By jrobohm
I have been using Map 6 - fine-tuning the EcuTek...

I have been using Map 6 - fine-tuning the EcuTek tune with the JB4 - with great results. Attached is a resent pull log. The effect of WMI on AFR, knock reduction, and most importantly IAT with NTX...
Forum: Infiniti Q50 Q60 VR30DDTT 07-06-2020, 06:21 AM
Replies: 1
Views: 266
Posted By jrobohm
When at idle - take a look at your AFR and trim...

When at idle - take a look at your AFR and trim numbers for Bank1 and Bank2 - the AFR and Trim numbers from both banks should be very close to each other. IF however, the AFR number on Bank1 says...
Forum: Infiniti Q50 Q60 VR30DDTT 07-04-2020, 07:53 AM
Replies: 357
Views: 14,306
Posted By jrobohm
May sound strange but I used a pair of hemostats...

May sound strange but I used a pair of hemostats to hold the wires / Posi-Taps as my hands are too big to fit in tight spaces like the VR30 engine bay.
Forum: Infiniti Q50 Q60 VR30DDTT 07-04-2020, 06:03 AM
Replies: 357
Views: 14,306
Posted By jrobohm
Amazon has them Lockitt POSI-TAP 6 pack wire...

Amazon has them
Lockitt POSI-TAP 6 pack wire connectors 20-22 awg https://smile.amazon.com/dp/B001MPW54G/ref=cm_sw_r_cp_api_i_x4haFbJTX6HXN
Forum: Infiniti Q50 Q60 VR30DDTT 06-25-2020, 04:24 PM
Replies: 5,743
Views: 722,104
Posted By jrobohm
The 4500 range of timing still looks like the car...

The 4500 range of timing still looks like the car is struggling with the boost / octane level and pulling timing. He needs better fuel, lower boost, or suggest he add a WMI Kit to his JB4. ...
Forum: Infiniti Q50 Q60 VR30DDTT 06-24-2020, 07:29 PM
Replies: 5,743
Views: 722,104
Posted By jrobohm
Timing is being pulled (likely due to knock) +8...

Timing is being pulled (likely due to knock) +8 is too high for the fuel he is using IMHO.
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