Jump to content
The mkiv Supra Owners Club

Fitting Electronic TTC - South East?


madmunky

Recommended Posts

TTC is bad idea generally... why would you want to use TTC over the stock seq system? But that said, there are a few guides. You will need a dual pole switch, effectively it grounds the VSV's so they don't open.

 

So why is it a bad idea?

if thats the case why would anyone want to go single and have later spool up and have all the power in one hit, i like it because far more predictable and controllable power wise, no unannounced sideways out of wet bends, and better fuel consumption until you choose to put the boot in;)

Link to comment
Share on other sites

So why is it a bad idea?

if thats the case why would anyone want to go single and have later spool up and have all the power in one hit, i like it because far more predictable and controllable power wise, no unannounced sideways out of wet bends, and better fuel consumption until you choose to put the boot in;)

 

I perhaps should rephrase it, it is a bad idea to do TTC without any supporting modifications, ie ECU and the like. By just doing the ETTC mod you will confusing the hell out of the stock ECU which was designed to expect the twins to operate in a sequential mode.

Link to comment
Share on other sites

I perhaps should rephrase it, it is a bad idea to do TTC without any supporting modifications, ie ECU and the like. By just doing the ETTC mod you will confusing the hell out of the stock ECU which was designed to expect the twins to operate in a sequential mode.

 

:yeahthat:

 

We've been over this a few times :) If you haven't got a boost controller plumbed in right and set up right you'll get boost spikes north of 1.5bar. You'll lose a lot of low down power. You can experience detonation at points where you get more dense air than the stock ECU is expecting and therefore isn't fuelling enough for. etc.

 

-Ian

Link to comment
Share on other sites

You may even overfuel, and I suspect THAT'S one of the reason front crank seals go, and oil pumps wear out.

 

Thats a touch on the scaremongering's side Chris, i agree that one of the possible causes of oil pump failure could be down to heavy over fuelling, but even in TTC mode the std ECU will not over fuel any more that it will in normal sequential mode as it doesn't kick out of closed loop until after 4,000 RPM and providing both turbos are OK and boosting all should be well and as Ian says you can end up with a lean spot around there due to this.

I would be inclined to also state, as you have previously said, a far more credible cause would be problems with the second turbo not working so causing to much fuel for the diminished air flow.

I am 90% sure that my car had never been run in TTC mode until i got it, and that blew the front seal due to oil pump wear before i converted it, but i do suspect that it had second turbo problems before then;)

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Guest
Reply to this topic...

×   Pasted as rich text.   Restore formatting

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

×
×
  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue. You might also be interested in our Guidelines, Privacy Policy and Terms of Use.