Engine/Transmission (1998.5 - 2002) Effect of no wastegate?

[gsmith1]

What are the good or bad engine effects of replacing the stock turbo with a larger turbo, removing the wastegate and adding a performance chip?



This is on a 1998 24V.



I am trying to determine the benefits and risks to the longivity of the engine with the above modifications.



Thanks.

 

[Diesel Gunner]

Are you running stock, or have you already made mods? Perhaps you should create a sig for yourself. It will help to get you better answers faster.



Good Luck!

 

[gsmith1]

Everything is stock..... manual transmission.

 

[4xquadrod]

Removing the Wastegate?

I'm not sure of the type of waste-gate on these CTD but if you remove it you might risk over boosting which might not be a good thing.

 

[CFAR]

If you pierce the pump wire on a 98. 5 you get to see if you have one of the earlier pumps that had clearance issues.



Some of the earlier vp44 would die within a short time if the wire was pierced.



Anytime you increase performance you are going to decrease longevity. So it depends on how much performace you want. In my case I wanted about 400rwhp, I still have the stock turbo, I have to watch my egt temps when towing. Or blasting up hills. I also can break the tires loose in 5th and 6th if the roads are wet. I don't think you will need a larger turbo if you are just adding a box. We need some turbo experts here to talk about the benifits/problems of non wastegated turbos.



Some turbos need a waste gate to stop the turbo from over spooling (turning too fast) Some don't. If the big turbo you buy without a waste gate can provide 60psi, then that might not be a good thing for your head gasket.