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The mkiv Supra Owners Club

Sequential turbos


adi2009

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Hi,

Ever since my engine swap i have been using TTC. when the car is in TTC, it boosts upto about 9-10psi max. But when i switch to sequential mode it boosts to about 7psi and as the rpm rises, the boost drops to about 4psi. I've checked for boost leaks and there doesnt seem to be any. Anyone have any idea what could be wrong

 

Note: i am still using the stock NA exhaust on the car.

 

Cheers

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vsv's for sure! one of mine has just started playing up again! will probably be the iacv vsv, top one near the firewall is my bet. I prefer ttc though, it's safer for th turbos and its sooooo much smoother. for now i'd say go back to that but check for problems in hoses from the egcv and iacv actuators.

 

It's just going to be age related, I wonder if you can get new replacements?

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