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Old 05-30-2013, 01:21 AM   #26
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Quote:
Originally Posted by Mike TexaSS View Post
Ive seen boost spike on CTS-V's when you hit a lean spot.

Id bet your tune is off. If you look at your logs the 02 voltage is extremely lean when the boost spike occurs!
My O2 voltage is really lean of every gear shift (w/or w/o boost spike)...is that not normal?
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Old 05-30-2013, 09:41 AM   #27
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Im not a fan of closed loop maf tunes.

If you must tune maf (ugh!) open loop is the way to go.

Id take advantage of the ZR1 map and go SD!
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Old 05-30-2013, 01:49 PM   #28
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Im not a fan of closed loop maf tunes.

If you must tune maf (ugh!) open loop is the way to go.

Id take advantage of the ZR1 map and go SD!
Already discussing that w my tune, just haven't made the time to convert it yet. Likely in the near future.
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Old 05-30-2013, 03:21 PM   #29
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Who tuned it?
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Old 05-30-2013, 05:07 PM   #30
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Im not a fan of closed loop maf tunes.

If you must tune maf (ugh!) open loop is the way to go.

Id take advantage of the ZR1 map and go SD!
I don't understand your concern, whats the difference at WOT between an open loop and a closed loop MAF tune? Nothing, you are simply in closed loop at idle and partial throttle, as soon as you stab the throttle you're in open loop, what am I not getting here?

The MAF sensor, even with it being accurate can use some help from the oxygen sensors to keep AFR at stoich when you want it to be stoich.
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Old 05-30-2013, 06:07 PM   #31
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WHo tuned it ? if it wasnt Patrick G . PM me i will give u his number. He will get it right
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Old 05-30-2013, 08:03 PM   #32
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A personal friend tuned it. I'm planning to get Mike Norris to review the tune when I finalize it. Ayousef concluded my throttle body is the problem. It is lagging the desired position when spun up and I punch it. I have a TPiS in the mail, so I hope he is right! I'm also going to remove my high flow cats. Can't hurt.

I hear lots of good things about Mike, do I need to do some research in Patrick G?
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Old 05-30-2013, 08:48 PM   #33
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no research needed , just the best tuner around that will spend the time needed to get it perfect!
TPIS is great.
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Old 05-30-2013, 08:49 PM   #34
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you should see another 25 rwhp with the tpis over stock ..
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Old 05-31-2013, 10:25 AM   #35
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I got a barely used TPIS in the classifieds for sale here.
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Old 05-31-2013, 10:29 AM   #36
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I got a barely used TPIS in the classifieds for sale here.
I thought I looked. I sent in the ls2 core about 2 weeks ago.
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Old 05-31-2013, 12:04 PM   #37
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I thought I looked. I sent in the ls2 core about 2 weeks ago.
Yeah, if you already had the LS2 motor, it probably wouldn't have been worth it as ours includes it. I put in the ZL1 section as those are the guys using this thing the most.

http://www.camaro5.com/forums/showthread.php?t=294176
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Old 05-31-2013, 12:21 PM   #38
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I just got a refund from TPIS for 3 TBs that were junk....The search continues for a 102mm that doesnt suck......
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Old 05-31-2013, 02:00 PM   #39
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I just got a refund from TPIS for 3 TBs that were junk....The search continues for a 102mm that doesnt suck......
What issue did you have?

This one was on a built Whipple'd ZL1 and we only switched it because the customer wanted the billet bling of the Nick Williams.
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Old 05-31-2013, 02:06 PM   #40
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That's the first negative comment I've seen on the TPiS. I hope I get lucky.
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Old 05-31-2013, 02:31 PM   #41
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Quote:
Originally Posted by Mike TexaSS View Post
I just got a refund from TPIS for 3 TBs that were junk....The search continues for a 102mm that doesnt suck......
Must have been the 3 bad ones i sent back LOL

TPIS is Great to work with they helped Us quite a bit and provided us with Great customer service, and replaced all the units we had problems with.

All the ones we have out there now work well.

Moving One to the OP problem.

I believe what you need is to Tune the Predicted and VE Coefficient Tables and set them up for a 3 Bar Map as they are only set up for a 1 bar.

The Coefficient tables will fill in the void of the time between when the Throttle snaps open and the MAF actually sees the Air flow.

The Coefficient tables will provide the fuel based on TP RPM Air Temp and MAP without any input from the MAF..

I have seen this on Every Whipple Car we built, Until I did the Proper Tuning and All Gone.

Greg Banish Teaches this Technique in his Advanced Tuning Class.

You still Keep your MAF and Closed Loop and Enjoy all the Benefits without Disabling Anything.


Ted.
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Old 05-31-2013, 03:12 PM   #42
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Must have been the 3 bad ones i sent back LOL

TPIS is Great to work with they helped Us quite a bit and provided us with Great customer service, and replaced all the units we had problems with.

All the ones we have out there now work well.

Moving One to the OP problem.

I believe what you need is to Tune the Predicted and VE Coefficient Tables and set them up for a 3 Bar Map as they are only set up for a 1 bar.

The Coefficient tables will fill in the void of the time between when the Throttle snaps open and the MAF actually sees the Air flow.

The Coefficient tables will provide the fuel based on TP RPM Air Temp and MAP without any input from the MAF..

I have seen this on Every Whipple Car we built, Until I did the Proper Tuning and All Gone.

Greg Banish Teaches this Technique in his Advanced Tuning Class.

You still Keep your MAF and Closed Loop and Enjoy all the Benefits without Disabling Anything.


Ted.
Taught. Greg took a position with one of the big three and they don't want him freelancing. He held his Florida classes here at Redline.
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Old 05-31-2013, 03:13 PM   #43
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Quote:
Originally Posted by JANNETTYRACING View Post
Must have been the 3 bad ones i sent back LOL

TPIS is Great to work with they helped Us quite a bit and provided us with Great customer service, and replaced all the units we had problems with.

All the ones we have out there now work well.

Moving One to the OP problem.

I believe what you need is to Tune the Predicted and VE Coefficient Tables and set them up for a 3 Bar Map as they are only set up for a 1 bar.

The Coefficient tables will fill in the void of the time between when the Throttle snaps open and the MAF actually sees the Air flow.

The Coefficient tables will provide the fuel based on TP RPM Air Temp and MAP without any input from the MAF..

I have seen this on Every Whipple Car we built, Until I did the Proper Tuning and All Gone.

Greg Banish Teaches this Technique in his Advanced Tuning Class.

You still Keep your MAF and Closed Loop and Enjoy all the Benefits without Disabling Anything.


Ted.
Thank you Ted! I will definitely take this to my tuner. I'm curious why Whipple isn't aware of this issue? Maybe the 3 bar map isn't that common.

Pat
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Old 05-31-2013, 03:22 PM   #44
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Thank you Ted! I will definitely take this to my tuner. I'm curious why Whipple isn't aware of this issue? Maybe the 3 bar map isn't that common.

Pat
Your Welcome, He will need a copy of HPtuners and the Blue Cat tool or EFI Live to create a virtual VE.

There is No fuel in the Coefficient tables above 1.2 Bar so you have to carry that out and fine tune it when adding a 3 bar MAP

The distance between the MAF and the intake valve is Longer with a Whipple, and there is a lot more (What we Call) Plenum Volume because of it's size.

So the Motor takes a gulp of Air with NO Fuel to Cover the HOLE before the MAF Sees it.

The Further the MAF is from the intake valve the worse this problem gets.

Remember Air flows Like a Slinky.
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Old 05-31-2013, 03:25 PM   #45
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BBK has some new throttle body's coming out. Hope they work cause I want a 102 for my whipple.
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Old 05-31-2013, 03:30 PM   #46
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BBK has some new throttle body's coming out. Hope they work cause I want a 102 for my whipple.
You can get a TPIS 102 right now.
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Old 05-31-2013, 07:01 PM   #47
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Old 05-31-2013, 07:26 PM   #48
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Originally Posted by JANNETTYRACING View Post
Your Welcome, He will need a copy of HPtuners and the Blue Cat tool or EFI Live to create a virtual VE.

There is No fuel in the Coefficient tables above 1.2 Bar so you have to carry that out and fine tune it when adding a 3 bar MAP

The distance between the MAF and the intake valve is Longer with a Whipple, and there is a lot more (What we Call) Plenum Volume because of it's size.

So the Motor takes a gulp of Air with NO Fuel to Cover the HOLE before the MAF Sees it.

The Further the MAF is from the intake valve the worse this problem gets.

Remember Air flows Like a Slinky.
So Ted, what you suggested might be a plausible explain ion for the Lean spot hes getting, but what explains the boost spike, as far as I know the MAP values we read are simply lookup values for the voltage using the inputed 0-5v MAP voltage slope.

So im thinking your idea could solve the Lean AFR which is a symptom associated with the spike, but not solve the original problem, which is the boost spike.
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Old 05-31-2013, 09:10 PM   #49
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The boost spike is a product of the rotor speed and how fast the bypass valve closes
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Old 05-31-2013, 09:12 PM   #50
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The fix is in shifting with the throttle on the floor Or what is better known as power shifting
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