TAC

2

TAC-L67 $97.99
Model
Regular price $97.99
It plugs inline with the TPS sensor. When using large ported throttle body's, blow through power adders or scaling MAF frequency the PCM can calculate an incorrect load. The TAC re-maps the TPS output to correct the signal going to the PCM.

When you switch to a blow through power adder or very large TB the engine can take in a large amount of air with very little throttle opening. This creates a high engine load while the PCM is thinking the engine load is still low. Problems that arise from this are:
  • Trans shutter under light acceleration
  • Converter lockup hunting
  • Improper fueling under mid throttle
Fueling issues that can arise are especially dangerous. For example if you have a 75mm throttle body on a GTP that came stock with a 69.5mm TB the engine can be at very high HP levels with 40 or 50% throttle. With the TPS reporting 50% throttle position angle the PCM will still be commanding closed loop fueling. This means that you'll be at nearly full engine load with the PCM trying to trim the fuel to achieve a 14.7:1 AF ratio. This can blow pistons in a hurry! The TAC corrects this problem.
*This item and all electrical items are non-returnable. Warranty replacements are offered for 1 year on defective products.

**Will not work on drive by wire applications.

FAQ
When do I need a TAC?

Stage 1 or 2 throttle body owners usually do not need this product. It's when making larger changes like using an LS1 or Northstar throttle body where the problems arise. Any blow through application (especially turbo's) should run the TAC.

When scaling the MAF frequency under 85% the PCM can lighten line pressure causing trans shutter or slow converter lockup. The TAC is recommended to correct for this.

What if my car is stock and I run this product?

Your shift points will be slightly higher but it will not benefit or harm the car

Do I need PCM programming for this?

No. It will work with any PCM.

Isn't this the same thing as a throttle position enhancer?

No. The TPSE is a glorified switch that changes your TPS voltage to 4.6 volts when the throttle position goes to 70%. In essence with the TPSE installed, your throttle position sensor works just like stock until you get to 70% then it goes from 70% to 100%. This device was not meant to and does nothing to correct the problems discussed earlier.

The TAC is a micro controller that constantly monitors the throttle position angle voltage and adjusts it in real time. This allows the signal to be modified in such a way that reports an increased load to the PCM. The TAC is programmed using an algorithm plotted out by comparing the flow characteristics of a stock TB to a unit with a larger bore.

There are 2 versions, L67/L36 (the same) OR L67/L36 to LS1 adapter.

 

 

It plugs inline with the TPS sensor. When using large ported throttle body's, blow through power adders or scaling MAF frequency the PCM can calculate an incorrect load. The TAC re-maps the TPS output to correct the signal going to the PCM.

When you switch to a blow through power adder or very large TB the engine can take in a large amount of air with very little throttle opening. This creates a high engine load while the PCM is thinking the engine load is still low. Problems that arise from this are:
  • Trans shutter under light acceleration
  • Converter lockup hunting
  • Improper fueling under mid throttle
Fueling issues that can arise are especially dangerous. For example if you have a 75mm throttle body on a GTP that came stock with a 69.5mm TB the engine can be at very high HP levels with 40 or 50% throttle. With the TPS reporting 50% throttle position angle the PCM will still be commanding closed loop fueling. This means that you'll be at nearly full engine load with the PCM trying to trim the fuel to achieve a 14.7:1 AF ratio. This can blow pistons in a hurry! The TAC corrects this problem.
*This item and all electrical items are non-returnable. Warranty replacements are offered for 1 year on defective products.

**Will not work on drive by wire applications.

FAQ
When do I need a TAC?

Stage 1 or 2 throttle body owners usually do not need this product. It's when making larger changes like using an LS1 or Northstar throttle body where the problems arise. Any blow through application (especially turbo's) should run the TAC.

When scaling the MAF frequency under 85% the PCM can lighten line pressure causing trans shutter or slow converter lockup. The TAC is recommended to correct for this.

What if my car is stock and I run this product?

Your shift points will be slightly higher but it will not benefit or harm the car

Do I need PCM programming for this?

No. It will work with any PCM.

Isn't this the same thing as a throttle position enhancer?

No. The TPSE is a glorified switch that changes your TPS voltage to 4.6 volts when the throttle position goes to 70%. In essence with the TPSE installed, your throttle position sensor works just like stock until you get to 70% then it goes from 70% to 100%. This device was not meant to and does nothing to correct the problems discussed earlier.

The TAC is a micro controller that constantly monitors the throttle position angle voltage and adjusts it in real time. This allows the signal to be modified in such a way that reports an increased load to the PCM. The TAC is programmed using an algorithm plotted out by comparing the flow characteristics of a stock TB to a unit with a larger bore.

There are 2 versions, L67/L36 (the same) OR L67/L36 to LS1 adapter.

 

 

You are viewing a product listed on the following platform:

3800

Customer Reviews

5 Based on 2 reviews
5 ★
100% 
2
4 ★
0% 
0
3 ★
0% 
0
2 ★
0% 
0
1 ★
0% 
0
Write a Review
  • Reviews

Thank you for submitting a review!

Your input is very much appreciated. Share it with your friends so they can enjoy it too!

JC
01/03/2016
Joseph C.

Beautiful

Does what it says it does plug n play baby!!

DP
07/27/2015
David P.

Tac

Works great and replaces your existing adapter if you have the northstar throttle body.