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Showing results 1 to 25 of 100 Search: Posts Made By: jrobohm
Forum: Infiniti Q50 Q60 VR30DDTT 01-08-2021, 10:33 AM
Replies: 5,829
Views: 757,261
Posted By jrobohm
If you upgrade your LPFP - you may seen some...

If you upgrade your LPFP - you may seen some relief on the Fuel Trims being maxed out. The HPFP upgrade would require a tune, so going that direction is a big step. You can also add in a WMI kit to...
Forum: Infiniti Q50 Q60 VR30DDTT 01-02-2021, 08:02 AM
Replies: 507
Views: 31,404
Posted By jrobohm
That's a big post - lots of history in these...

That's a big post - lots of history in these forums - some of which I have forgotten. Starting with the basics - please update your signature to include your car's details (year, trim line,...
Forum: Infiniti Q50 Q60 VR30DDTT 12-28-2020, 07:42 AM
Replies: 5,829
Views: 757,261
Posted By jrobohm
E30 seems to be the most these stock fuel systems...

E30 seems to be the most these stock fuel systems can handle before the fuel flow limitations of the stock HPFP/LPFP become a real issue. If messing around with E Fuel blends - be sure to test your...
Forum: Infiniti Q50 Q60 VR30DDTT 12-15-2020, 06:45 AM
Replies: 507
Views: 31,404
Posted By jrobohm
WMI is a very nice effective octane cushion when...

WMI is a very nice effective octane cushion when running high timing and/or boost. As I live in typically hot weather - the added cooling effect is a big bonus. Yes it isn’t cheap, or convenient to...
Forum: Infiniti Q50 Q60 VR30DDTT 12-11-2020, 07:09 AM
Replies: 507
Views: 31,404
Posted By jrobohm
Terry would have the definitive answer but I...

Terry would have the definitive answer but I believe that BMS WMI statement is for the BMW platform and not the Infiniti.
Forum: Infiniti Q50 Q60 VR30DDTT 12-01-2020, 11:27 AM
Replies: 5,829
Views: 757,261
Posted By jrobohm
Terry's response hit the mark from your phone -...

Terry's response hit the mark from your phone - if you want to do some laptop / browser level graphing - I would suggest getting a free account on Datazap where you can upload your JB4 log csv files....
Forum: Infiniti Q50 Q60 VR30DDTT 11-30-2020, 05:14 PM
Replies: 5,829
Views: 757,261
Posted By jrobohm
I would suggest taking advantage of one of the...

I would suggest taking advantage of one of the JB4 App's best features - Log by WOT

In the JB4 App (iPhone version is what I am using - Android maybe slightly different) Under Settings - Advanced...
Forum: Infiniti Q50 Q60 VR30DDTT 11-04-2020, 08:12 AM
Replies: 5,829
Views: 757,261
Posted By jrobohm
WMI is the obvious choice. Watch out for MMT...

WMI is the obvious choice. Watch out for MMT octane boost additives - they do work but leave you with orange spark plugs !
Forum: Infiniti Q50 Q60 VR30DDTT 11-02-2020, 07:37 AM
Replies: 5,829
Views: 757,261
Posted By jrobohm
Ditto - stock turbos and 93 octane at PSI numbers...

Ditto - stock turbos and 93 octane at PSI numbers that high tend to quickly cause knock. Run some unleaded race fuel in the 100 octane range and you might be able to pull those boost ask numbers in...
Forum: Infiniti Q50 Q60 VR30DDTT 11-01-2020, 03:30 PM
Replies: 5,829
Views: 757,261
Posted By jrobohm
Find a nice highway on-ramp - 3rd-4th pulls are...

Find a nice highway on-ramp - 3rd-4th pulls are most telling in the logs. A RS with Map1 and good 93 fuel should yield nice results, but the logs will be the litmus test.
Forum: Infiniti Q50 Q60 VR30DDTT 11-01-2020, 03:08 PM
Replies: 5,829
Views: 757,261
Posted By jrobohm
Stick with stock map 1 - log - post for comments...

Stick with stock map 1 - log - post for comments - then move up the stock maps until you see where your fuel gets you before the engine starts to pull timing due to knock.
Forum: Infiniti Q50 Q60 VR30DDTT 10-22-2020, 09:11 AM
Replies: 13
Views: 510
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: 265
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: 13
Views: 510
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: 5,829
Views: 757,261
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: 507
Views: 31,404
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: 5,829
Views: 757,261
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: 507
Views: 31,404
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: 507
Views: 31,404
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: 507
Views: 31,404
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: 507
Views: 31,404
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: 355
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: 507
Views: 31,404
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: 507
Views: 31,404
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: 507
Views: 31,404
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...
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