90mm TB Poll
Racer
Joined: Sep 2000
Posts: 487
Likes: 0
From: Below the Mason/Dixon Line Alabama
Originally Posted by Z06-JIM
The one, very annoying problem with my 90mm FAST Intake/Throttle Body combo is the Reduced Power Mode that comes in occasionally that usually only happens at slower speeds.
Finding a place to pull off the road and re-set the code can be a hassle at times.
It also surges at times trying to find an idle when coming to a stop. I can live with the slight idle hunting/surging but the reduced power mode is a real pain in the butt.
I have the Nicks T/B on mine.
Is anyone else having this Reduced Power issue?
Finding a place to pull off the road and re-set the code can be a hassle at times.
It also surges at times trying to find an idle when coming to a stop. I can live with the slight idle hunting/surging but the reduced power mode is a real pain in the butt.
I have the Nicks T/B on mine.
Is anyone else having this Reduced Power issue?
You'll need LS1 edit or HP tuners to do this (or someone with this software who knows how to tune for this).
The hunting/surging also reflects a need to adjust your idle tuning, a very common problem with these as well. Take a look on LS1tech.com as well; there was a detailed thread on idle tuning about two/three months ago as well as some good recommendations from "NoGo" who'se a pretty knowledgeable tuner.
Our own RJ helped me immeasurably with this (as he continues to do). You can get this right, even on pretty radical setups, but it does take some time.
Good luck.
Melting Slicks
Joined: Oct 2002
Posts: 2,855
Likes: 0
Hello Doc--hows it coming--Nick is visiting friends this weekend near me and we are going to install his lastest version and tweak it with edit--this latest version has bearings for the T plate and he has been working towards and been quite successful switching the new TB with the stock tuning for the stock unit with very little tweaking in the idle areas particullarly--we will see how it goes with the 436--after we have it idle and run I'll take it back down for some dyno pulls and final tweaking in all area's--this will be a good test for strokers and if nothing else we will find out what needs to be done to make the TB conversion a much smoother operation--I will post results
Melting Slicks
Joined: Mar 2001
Posts: 3,084
Likes: 0
I'm aware of this TB, but for the time being(with crossed fingers knocking on wooden rabbits feet) it appears that the TPIS in fact CAN be tuned. I spent a day and a half with Pete K at Agostino tuning my F.A.S.T setup with the TPIS throttle body, and although it was absolutely bonkers when I first got it, I've since put on a shade under a thousand miles and it's working well. Or I should say as well as you could hope.
The only issues I'm having are the hunting for idle at stoplights, which virtually always goes-car slows down, goes to about 1500rpms while car is rolling to stop, dips to about 850-back to about a grand. Which is livaeble. Occasionally the car will stall after high rpm usage while it searches for idle, but that's what the track is for.
They got rid of my amazingly irritating automatic cruise control(the car would accellerate to given RPMs in the first 4 gears) and the self-powershifting the car was doing(upon pressing in the clutch, revs rocketing to 3k).
Oh, and how does 11.58 @ 124+ on a 1.88 60ft sound for the first trip at the track at an almost 2k DA(ok, so it was only 1600)? ET Streets here I come!
The only issues I'm having are the hunting for idle at stoplights, which virtually always goes-car slows down, goes to about 1500rpms while car is rolling to stop, dips to about 850-back to about a grand. Which is livaeble. Occasionally the car will stall after high rpm usage while it searches for idle, but that's what the track is for.
They got rid of my amazingly irritating automatic cruise control(the car would accellerate to given RPMs in the first 4 gears) and the self-powershifting the car was doing(upon pressing in the clutch, revs rocketing to 3k).
Oh, and how does 11.58 @ 124+ on a 1.88 60ft sound for the first trip at the track at an almost 2k DA(ok, so it was only 1600)? ET Streets here I come!
Thread Starter
Safety Car
Joined: Mar 2002
Posts: 4,928
Likes: 1
Cruise-In V Veteran
St. Jude Donor '09
DBK - your car would have much better manners with Nick's TB.......it would be polite.
gojo's car is an A4. Compare the tuning tables (complexity) of an automatic to a 6spd . There is a huge difference in the finesse and precision neccessary to tune an A4.
My point is gojo's car idles, AND transitions to idle, like it is stock and it IS an A4. It has a large cam, ported heads etc. and the A4 functions essentially as a stock setup.
What most of us are looking for is an increase in HP without sacrificing "Street Manners". This TB provides that.
A day and a half of tuning for compromised expectations is now history.
No frustration.
joel
gojo's car is an A4. Compare the tuning tables (complexity) of an automatic to a 6spd . There is a huge difference in the finesse and precision neccessary to tune an A4.
My point is gojo's car idles, AND transitions to idle, like it is stock and it IS an A4. It has a large cam, ported heads etc. and the A4 functions essentially as a stock setup.
What most of us are looking for is an increase in HP without sacrificing "Street Manners". This TB provides that.
A day and a half of tuning for compromised expectations is now history.
No frustration.
joel
Melting Slicks
Joined: Feb 2002
Posts: 2,613
Likes: 0
From: Winston Salem NC
Joel,
Thanks. I would have liked to take credit for tuning, but the cat's out of the bag. Nick's TB is easy to tune.
Whale, I would be surprised if it didn't need tuning after being tuned for a Fast or TPIS TB. The experience has been if the car comes in tuned to run well, with a stock TB, it will need little or no tuning with Nick's subsequently installed.
Thanks. I would have liked to take credit for tuning, but the cat's out of the bag. Nick's TB is easy to tune.
Whale, I would be surprised if it didn't need tuning after being tuned for a Fast or TPIS TB. The experience has been if the car comes in tuned to run well, with a stock TB, it will need little or no tuning with Nick's subsequently installed.
Thread Starter
Safety Car
Joined: Mar 2002
Posts: 4,928
Likes: 1
Cruise-In V Veteran
St. Jude Donor '09
Joe - You're welcome.
As I've said before - it's nice to see comments of Modesty.
(On another note- Gameover posted the g/cyl calcs the PCM uses with the VE table. I checked my scanned MAF-g/cyl values against the PCM calculated g/cyl values using NoGo's and Gameover's VE values. NoGo's is more accurate for my car - it's back to his derived table . Gameover's is off/lean by around 20%. I guess this analog man is a little bit of a Geek - My brother JAY KOCH (Forum name) should be proud. 
NoGo is THE MAN!!
As I've said before - it's nice to see comments of Modesty.
(On another note- Gameover posted the g/cyl calcs the PCM uses with the VE table. I checked my scanned MAF-g/cyl values against the PCM calculated g/cyl values using NoGo's and Gameover's VE values. NoGo's is more accurate for my car - it's back to his derived table
. Gameover's is off/lean by around 20%. I guess this analog man is a little bit of a Geek - My brother JAY KOCH (Forum name) should be proud. NoGo is THE MAN!!
Thread Starter
Safety Car
Joined: Mar 2002
Posts: 4,928
Likes: 1
Cruise-In V Veteran
St. Jude Donor '09
Originally Posted by Bink
Joe - You're welcome.
As I've said before - it's nice to see comments of Modesty.
(On another note- Gameover posted the g/cyl calcs the PCM uses with the VE table. I checked my scanned MAF-g/cyl values against the PCM calculated g/cyl values using NoGo's and Gameover's VE values. NoGo's is more accurate for my car - it's back to his derived table . Gameover's is off/lean by around 20%. I guess this analog man is a little bit of a Geek - My brother JAY KOCH (Forum name) should be proud.
NoGo is THE MAN!!
As I've said before - it's nice to see comments of Modesty.
(On another note- Gameover posted the g/cyl calcs the PCM uses with the VE table. I checked my scanned MAF-g/cyl values against the PCM calculated g/cyl values using NoGo's and Gameover's VE values. NoGo's is more accurate for my car - it's back to his derived table
. Gameover's is off/lean by around 20%. I guess this analog man is a little bit of a Geek - My brother JAY KOCH (Forum name) should be proud. NoGo is THE MAN!!
Last edited by Bink; Aug 1, 2004 at 08:11 PM.
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Racer
Joined: Sep 2000
Posts: 487
Likes: 0
From: Below the Mason/Dixon Line Alabama
Originally Posted by NEPTUNEBILL
Hello Doc--hows it coming--Nick is visiting friends this weekend near me and we are going to install his lastest version and tweak it with edit--this latest version has bearings for the T plate and he has been working towards and been quite successful switching the new TB with the stock tuning for the stock unit with very little tweaking in the idle areas particullarly--we will see how it goes with the 436--after we have it idle and run I'll take it back down for some dyno pulls and final tweaking in all area's--this will be a good test for strokers and if nothing else we will find out what needs to be done to make the TB conversion a much smoother operation--I will post results
Let me know how it goes with the latest TB: I suspect I have an early one, based on its time of install at LG. I DID have idle tuning issues, and still have some start/restart stuff going on, so wonder if I should go to an updated TB as well.
Racer
Joined: Jul 2003
Posts: 398
Likes: 0
From: Calera AL
Originally Posted by Z06-JIM
The one, very annoying problem with my 90mm FAST Intake/Throttle Body combo is the Reduced Power Mode that comes in occasionally that usually only happens at slower speeds.
Finding a place to pull off the road and re-set the code can be a hassle at times.
It also surges at times trying to find an idle when coming to a stop. I can live with the slight idle hunting/surging but the reduced power mode is a real pain in the butt.
I have the Nicks T/B on mine.
Is anyone else having this Reduced Power issue?
Finding a place to pull off the road and re-set the code can be a hassle at times.
It also surges at times trying to find an idle when coming to a stop. I can live with the slight idle hunting/surging but the reduced power mode is a real pain in the butt.
I have the Nicks T/B on mine.
Is anyone else having this Reduced Power issue?