nw102 issues

[CFM]

Originally Posted by Sam88gta1

Whipples do it, Maggies do it ,KB's do it ,turbo cars do it and all motor cars have done it to me. Granted these cars are high hp vehicles and not your typical street driven Camaro.
Last week I had a 2010 on the dyno with a 427ci RHS motor 88mm turbo that made 1095 rwhp on 14.7lbs. With the NW102 tb it closed at 5k rpm everytime with the stock 90mm ls3 tb it never had an issue. With the NW C5 tb from my car it stayed open all the way to the 7400 rpm rev limit.
Its the throttle body/ecm combo.

Did you log log any fluctuation in blade position at WOT?

I am assuming that the blade is not jammed against the stop at WOT as some have reported that limiting max throttle opening in the tune does not solve the problem.

Has anyone compared the spring tension/current draw at WOT to that of the LS3 TB or C5 NW?

[Blue70SS]

Originally Posted by CFM

I don't see any fluttering of the blade in the screenshot.

Are you limiting the max throttle opening in the tune or is it only showing 82.4% because you are logging SAE TP rather than the GM ETC TP PID?

What code was set?

SD tune? I know there is a MAF value showing in the log, but mine will log a read value even though I don't have one. May not be the case on the E38 cars.

Could be bumping into some limit......Might need some scaling?

P2135 Limp mode was set a few times Before the "MOD". I haven't pushed it hard enough to test the newly Modded NW102. Not sure about SAE TP.... I'll have to check with the tuner (I wondered that too). EDIT... Yes, just logging SAE Throttle Position. I was thinking the 8000 rpm before TB testing mode could possibly fix things.... but that was in the tune when the REP mode activated. Tuned off the MAF instead of changing the tables to help with elevation changes.

I was wondering if IAT temp #s needed to be changed since sensor is inside the supercharger now. Need to check into that more. Here's a few compiled #s from the data log at Indy.

[blake-b]

Mine did it today. I have a Ysi build. It occurred around 7000RPM and 15.4# of boost. Threw code P2101.

[CFM]

Originally Posted by Blue70SS

P2135 Limp mode was set a few times Before the "MOD". I haven't pushed it hard enough to test the newly Modded NW102. Not sure about SAE TP.... I'll have to check with the tuner (I wondered that too). EDIT... Yes, just logging SAE Throttle Position. I was thinking the 8000 rpm before TB testing mode could possibly fix things.... but that was in the tune when the REP mode activated. Tuned off the MAF instead of changing the tables to help with elevation changes.

I was wondering if IAT temp #s needed to be changed since sensor is inside the supercharger now. Need to check into that more. Here's a few compiled #s from the data log at Indy.

P2135 = TP sensor signals not in synch which is different than what most others have been reporting (P1515/P2101- both sensors in sync but out of expected range). Could even be the sensor itself causing these issues. Are the OE sensor board and sweep arm reused? I have an older LS2/LS7 90mm TB (aluminum blade) here that I previously dismantled. The arm is actually welded to the shaft.

[mikepage0007]

you guys are def looking at everything possible...hopefully if allgoes well this monday, will fire up the 427..but won,t be on dyno till break in...

[blake-b]

Did ERL ever release their 102mm TB?

[Hendrix-Engineering]

Originally Posted by blake-b

Did ERL ever release their 102mm TB?

Did you ever see one first hand? I would hate to try and tune that piece lol

[blake-b]

Originally Posted by Hendrix-Engineering

Did you ever see one first hand? I would hate to try and tune that piece lol

No, I haven't seen one firsthand. I am just seeking a solution like everyone else and came across it while researching.

I have emailed Nick but haven't gotten a response yet, but I don't expect one yet as I just did it Saturday and I am sure he has other things he is dealing with. I suppose if I don't hear from him within a week or two, I will seek out an LS2 TB to use as they seem to be less prone to the issue.

[JANNETTYRACING]

Originally Posted by blake-b

Mine did it today. I have a Ysi build. It occurred around 7000RPM and 15.4# of boost. Threw code P2101.

NO need to run one with a YSI, the stock throttle body made 1200 HP without issue.

Ted.

[Rat]

Originally Posted by JANNETTYRACING

NO need to run one with a YSI, the stock throttle body made 1200 HP without issue.

Ted.

^This!

Helps the positive displacement blower guys more then anyone.

[blake-b]

Heck with it.... I will just sell my NW102 and get a stock one. Anyone want to buy a NW102 with just over 1000 miles on it?

[MikeOD]

Originally Posted by CFM

Hello All,

I'm trying to understand what is actually going on here.

Does anyone have a log file that shows this happening? Commanded/Desired ETCTP, actual ETCTP, TPS1 and TPS2 voltage, airflow and RPM PIDs would be helpful. As a test, has anyone tried disabling the throttle too high/too low in the tune(set to 100%)? I see this is set at 6% in the stock Camaro tunes and 7% in the truck tunes. At WOT the primary TPS signal will be low, say around 1.0V, so there is only .06V of wiggle room before a fault condition is triggered.

Has anyone visually confirmed that the throttle blade is physically fluttering before REP is triggered?

Grant@TRP

That test is set to 7.5% in my stock 2010 LS3 tune...not 6% or 7%.

[Sam88gta1]

Originally Posted by Hendrix-Engineering

Did you ever see one first hand? I would hate to try and tune that piece lol

I would take on that challenge. I have yet to run across a tb I can't tune.

[MikeOD]

Originally Posted by MikeOD

That test is set to 7.5% in my stock 2010 LS3 tune...not 6% or 7%.

I'm a moron, I wasn't looking at my own cars tune...it's set to 6.180% in my 2010 LS3 Camaro SS.