Ttc

Rajinder · 29th June 2011, 09:12 AM

What would be the long term effect mostly negative on the engine if one went down the TTC route without remapping and having a piggy back ecu to sort the fueling and ignition?
I have a friend who did none of the above and the car runs fine after 2 years.

Cheers.

Martin F · 29th June 2011, 06:26 PM

Quote:

Originally Posted by Rajinder

I have a friend who did none of the above and the car runs fine after 2 years.

So by that does it imply that you have another friend who has done the above and their car doesn't run ok?

I can't actually think of any problems that could be created by running TTC long term.

Rajinder · 29th June 2011, 08:05 PM

Hi Martin,
What I ment to say was my friend went for TTC mod but he did not remap the car nor did he go for a piggy ecu to sort the fueling and ignition and the car runs fine after 2 years since he did the mod.
I am a great fan of the TTC. In fact on track days I switch to the TTC by swapping the hoses and put up faster times than the sequential mode.

I want to go the TTC route permanently but I do not want to remap the car nor get a piggy back ecu. Hence the mention of my friend.

Would the ecu not self adjust the timing and fueling after learning for sometime?

When I go for the TTC mode I do not get black smoke (overfueling) and the car runs perfectly.

I just want to be sure that I would not damage the engine without the remap and piggy back ecu.
A lot of people have diffrerent views on this and it would be nice to have yours as you are an expert on the MKIV.

Cheers.

Martin F · 29th June 2011, 10:02 PM

I think the ECU will learn some settings which will negate the need for a piggy back and should mean the car is no less reliable than standard BPU.

However a lot of peoples experience when going single and using a stock ECU with piggy back is that they struggle to tune around the 3,500 o 4,000rpm point where in a standard car the second turbo would come online. That would lead me to believe that the base map in the ECU is optimised for this point and hence why people struggle to tune around it.

Bearing that in mind you may find when in TTC mode and just running off a stock ECU that tuning is not optimised at this point.

Optimised and potentially causing damage to the engine are obviously two different things and I really don't think you run any risk of damage. However an easy way to be sure, to be sure, to be sure

would be to put the car on a dyno in TTC mode and monitor AFR.

Rajinder · 30th June 2011, 10:36 AM

I will just get the car remapped and leave the stock ECU as it is.

Many thanks for your info, Martin.

Cheers.

Martin F · 30th June 2011, 12:53 PM

But there lays a problem as there are very few people (none in the UK AFAIK) who can access and alter the stock ECU

29th June 2011, 09:12 AM	#1
Rajinder Member Jap Spec RZ - Auto (TT) Join Date: Jul 2004 Location: Slough Posts: 139	Ttc What would be the long term effect mostly negative on the engine if one went down the TTC route without remapping and having a piggy back ecu to sort the fueling and ignition? I have a friend who did none of the above and the car runs fine after 2 years. Cheers. __________________ Rajinder. Supra TT G1HAR /400 Honda Integra DC5 Honda Integra DC2 Nissan 370Z

29th June 2011, 08:05 PM	#3
Rajinder Member Jap Spec RZ - Auto (TT) Join Date: Jul 2004 Location: Slough Posts: 139	Hi Martin, What I ment to say was my friend went for TTC mod but he did not remap the car nor did he go for a piggy ecu to sort the fueling and ignition and the car runs fine after 2 years since he did the mod. I am a great fan of the TTC. In fact on track days I switch to the TTC by swapping the hoses and put up faster times than the sequential mode. I want to go the TTC route permanently but I do not want to remap the car nor get a piggy back ecu. Hence the mention of my friend. Would the ecu not self adjust the timing and fueling after learning for sometime? When I go for the TTC mode I do not get black smoke (overfueling) and the car runs perfectly. I just want to be sure that I would not damage the engine without the remap and piggy back ecu. A lot of people have diffrerent views on this and it would be nice to have yours as you are an expert on the MKIV. Cheers. __________________ Rajinder. Supra TT G1HAR /400 Honda Integra DC5 Honda Integra DC2 Nissan 370Z

29th June 2011, 10:02 PM	#4
Martin F Administrator UK Spec - Manual Join Date: Aug 2003 Location: Essex, UK Posts: 10,226	I think the ECU will learn some settings which will negate the need for a piggy back and should mean the car is no less reliable than standard BPU. However a lot of peoples experience when going single and using a stock ECU with piggy back is that they struggle to tune around the 3,500 o 4,000rpm point where in a standard car the second turbo would come online. That would lead me to believe that the base map in the ECU is optimised for this point and hence why people struggle to tune around it. Bearing that in mind you may find when in TTC mode and just running off a stock ECU that tuning is not optimised at this point. Optimised and potentially causing damage to the engine are obviously two different things and I really don't think you run any risk of damage. However an easy way to be sure, to be sure, to be sure would be to put the car on a dyno in TTC mode and monitor AFR. __________________ Martin UK6TT + Bits & Bobs 'Remember folks, the inside lane isn't just for Xmas' MSOC FAQ MSOC Members Discounts MSOC Resources

30th June 2011, 10:36 AM	#5
Rajinder Member Jap Spec RZ - Auto (TT) Join Date: Jul 2004 Location: Slough Posts: 139	I will just get the car remapped and leave the stock ECU as it is. Many thanks for your info, Martin. Cheers. __________________ Rajinder. Supra TT G1HAR /400 Honda Integra DC5 Honda Integra DC2 Nissan 370Z

30th June 2011, 12:53 PM	#6
Martin F Administrator UK Spec - Manual Join Date: Aug 2003 Location: Essex, UK Posts: 10,226	But there lays a problem as there are very few people (none in the UK AFAIK) who can access and alter the stock ECU __________________ Martin UK6TT + Bits & Bobs 'Remember folks, the inside lane isn't just for Xmas' MSOC FAQ MSOC Members Discounts MSOC Resources

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