Is it normal for my turbo to begin building boost at 4,000 RPM? My motor is all stock except for some unknown cams, and the turbo is the original style CT26 and has no shaft play or anything, looks like it has low miles. Also, I think there is bigger injectors in it, but it runs smooth.
4k RPM turbo lag?!?!
- Thread starter Shanesmyname
- Start date
definitly not normal, my old blown ct-26 could make 10psi by 2.5k rpm
and my fresh 57-ct26 would make 14psi @ 2.7k and 18@3.2 ish
and my fresh 57-ct26 would make 14psi @ 2.7k and 18@3.2 ish
It's done it since I have had the car for a few weeks now. and no, it seems like there is nothing going on under 4,000, then bam! It takes off.
There's no good reason why a CT-26 should do that. My T4 diesel turbo does that. We're going to need more information and maybe pictures of the car with your setup.
Good point, especially if the transmission has been remotely abused or still has factory oil in it. It's more than likely that the fluid and torque converter are both completely shotCajunKenny;1859557 said:
It's an r154, and clutch is good, definitely nothing slipping. It for sure has to deal with the engine. and I know the car is running really rich, I get like 9 mpg, could that be hindering it?
And i am not sure what other info I can give, It's is mainly stock, possibly injectors and a different cam.
some restriction in the exhaust maybe?? when i took down my ancient original exhaust (which i ran for a couple months) i found wrenches in that Mo'fo. :runaway:
*TRUE STORY*
*TRUE STORY*
The wastegate may not exactly be completely open. The seat where the gate sits could be worn out. This would not allow the gate to seal properly. I would be checking this first off.IndigoMKII;1863717 said:
customs;1863727 said:
If the gate was stuck slightly open, you wouldn't get the BAM effect he's saying. When he says BAM I'm thinking from not going anywhere to full boost haulin ass. A slightly stuck open would cause the PSI to crawl up.
I had that the exact same issue with an upgraded ct-26 60-1. I had 3 things going on so I dont know which one it was. But had a code 52 which retarded the timing, exhaust manifold leak, busted intercooler cooupling(boostleak).
IndigoMKII;1863759 said:
Well yesterday I had most of it apart to inspect it. And I noticed that there was some damage on the vacuum part of the wastegate actuator. But I also noticed that the arm itself isn't completely dirty, so it is showing signs of it moving. And another thing I noticed was half a court throughout all my intake system, in the throttle body, in the intercoolers and in the intake side of the compressor housing. I'm thinking PCV went bad.