Weird (i guess wastegate related) problem
#1
Full Member
Thread Starter
Weird (i guess wastegate related) problem
I've got a T04B Turbo with an external Tial 38mm-Wastegate in my RX7 Turbo II and since yesterday i've got a weird problem with the boost pressure. The car runs great with normal boost till round about 6000rpm but if i try to get higher than 6000, the boost pressure immediately goes down to 0psi.
What the hell could be wrong here? The car was running fine for about 8 weeks and then this happened.
What the hell could be wrong here? The car was running fine for about 8 weeks and then this happened.
Trending Topics
#10
Lives on the Forum
iTrader: (8)
Which would cause more boost, not less. But that does bring something else to mind, do you have a cat on this thing? Could be clogged.
This is how you test for boost leaks... (normally you put a gauge on it to see how much pressure your putting in). Crank it up to 20 PSi and see what blows off and/or leaks.
thewird
thewird
#13
Full Member
Thread Starter
I've got a cat on the RX7 but it's brand new and it's a 100 cpi one so i guess it should be ok. I don't think the wastegate can be pushed open because of back pressure the way i connected it. It's connected to the manifold on one side and to the downpipe on the other side so it should really get always the same pressure as the turbo.
Last edited by Th0m4s; 08-17-12 at 12:10 AM.
#14
Arrogant Wankeler
If not boost leak (reasonably likely), rag in the intercooler is a good one, gets picked up when you reach that flow level consistently, or soft turbo inlet pipe/filter collapsing on itself.
#15
Full Member
Thread Starter
Didn't have enough time for vaccum testing til now but i found out i've got a blown seal between the manifold and the turbo. I ordered a new one today. Might that cause my problem?
#16
Full Member
Thread Starter
Problem solved. It really was the blown seal. Amazing how much trouble such a sall piece of metal can cause.
Thanks for all your suggestions and help.
Thanks for all your suggestions and help.
Thread
Thread Starter
Forum
Replies
Last Post
Jeff20B
1st Generation Specific (1979-1985)
73
09-16-18 07:16 PM
Nosferatu
2nd Generation Specific (1986-1992)
7
09-05-15 02:13 PM