Ive seen threads floating around about blown motors caused by spiking with the TN turbo kit. Im just wondering if theres any with further fuel upgrades then what is given from TN have blown any motors?

Cause isnt thats whats causing them to blow...not enough fuel cause the maxed 380cc injectors

 

Give me one instance of a proven blown motor caused by "overboost" please?

The only instance I've seen from a boost spike was from ipcheck's car which was spiking to 20psi and he was still driving it. In that case I will say he burned through a line somewhere or had something very wrong with his setup, as there's absolutely no way simple "overboost" would cause a spike that bad.

Besides, the wastegate relocation pipe that has shipped with every kit for the past year or more has reduced it to a non-issue. I installed the wastegate relocation on my car this weekend and my car boosts perfectly to 6.3psi on my 7lb spring with the EBC off (perfect), 8psi on my 8psi setting, and 9psi on my 9psi setting. It's holding perfect boost even with my 3in exhaust.


What's causing these turbo cars seems to be raising the rev limiter and running them repeatedly in higher rpms, misshifting to a lower gear, or failure based on variance in manufacturing processes combined with simple power output.

The 380cc injectors and warlboro 255lph fuel pump are perfectly capable of handling fuel delivery up to around 9.5psi @6500 rpms. If you're running the reflash just make sure you verify your setup is running properly and delivering proper AFR's on the dyno before boosting.

 

oh ok...didnt know that...ya i got 440cc injectors and the walboro fuel pump and utec with the map sensor. I dont have the relocation pipe with my kit though....but im probably gunna get the utec boost solenoid at one point and the map switch..so where can i get a lower boost spring.

 

Did you order your kit from a dealer and it didn't come with that pipe? Are you positive it has the old pipe?

If so, you won't be able to control boost properly even with an electronic boost solenoid. I am running the SBC id-3 and I was still getting boost creep in 4th 5th and 6th gears. 1-3 were absolutely fine but when the engine was under heavier load it still crept a little. (By creep I mean it would hit my 9psi setting and slowly creep up to about 9.5psi)

If you need a lower PSI wastegate spring, I'd recommend contacting a turbonetics dealer and they should be able to order one for you for a few bucks. I'd recommend contacting turbonetics directly to see if they are still supplying wastegate relocation kits for older kits if you've happened to get one of those.

 

well i bought my kit off of gumpdriver...he said he never had a problem with spike so ill see how it does....what if i got a pipe make and a plate and made it external dump...no spike then right.

 

I'm not positive if that would totally alleviate the issue, but it might help... The main problem is the angle of the wastegate in relation to the piping and it not being able to collect the exhaust gases efficiently.

 

Add a second wastegate???

 

Installing the wastegate relocation pipe or making your own custom wastegate mount would be a simple alternative.

 

Just a thought to have diffrent springs to releave the psi, in an event of over boost...Seen it done before, with diff. pound springs so if one is max'd out the other could still let out psi....Seen this also on a supercharger...Oddly enough.

 

If you were putting another wastegate in the kit it would be much easier to simply replace the existing one with a larger one.

 

Man you really have done alot in these past couple of weeks.


Now back on topic, I had my car tuned by Sharif while he was working with CP in the first part of 06 with a UTEC, AAM Return fuel and 440cc injectors never at all at any point in time did I suffer boost spike. The car under full boost would range from 8.0 to 9.2 nothing more.


Will, let me know if you need anything for the install.

 

ya im starting the install this weekend...cant wait to feel this new found power

 

True but would'nt that cause pressure to escape too quickly thus makein the turbo have to re-boost the psi???

 

Not at all. Assuming you used a quality gate the pressur control within the diaphram would keep things as they should be. Hell I could run a Newgen wastegate good for 1000 HP (50mm wastegate) at 8 PSI on my Stage 1 kit and it would work without issues..

 

Hummm, thanks for the info...Intresting