Just had a quick question. I just picked up a 08 X about a month ago. The car had a ARC FMIC,HKS I/C piping,and a HKS intake. I just added a Catted invidia dp and a invidia n1. The car is not tuned but I'm only getting about 15 PSI's and it's tapering to about 13 PSI's.

I was having erratic boost spikes due to one of the vacuum hoses falling apart. I just wanted to get an idea of what other X owners are boosting with similar mods. Any input would be greatly appreciated. Thanks!

 

i don't drive an x but that sounds low to me. I'd do a boost leak test.

and you don't have to add an "s" at the end of PSI

 

Haha thanks. Before the dp and exhaust it was boosting between 16-19 psi but that was with a messed up vacuum hose. I am just confused because my old IX with just a HKS intake and it was boosting more. I'll have to have my mechanic check it out for me.

 

I forgot to mention that I am running a silencer. Would that kill the psi output that much?

 

The term is Pounds Per Square Inch, so pounds is already plural. Typically whens speaking about boost you would ask how much pressure most people will understand what you are talking about.

 

I'd say that's real low... isn't stock around 20 or 21?

 

chill out guys. this forum has a pretty active NA lancer section and a lot of guys start there.

Check your wastegate. specifically, check that the actuator is threaded correctly. sounds like you'r running off spring pressure. your boost gauge could also just be broke. get a tactrix and log to see what your ecu's seeing for boost, then check wgdc.

 

Go to a reputable shop, get your car boost leak tested, and please, I repeat PLEASE, do yourself a HUGE favor and don't mess with the boost...! Leave that to a knowledgeable tuner. Meaning behind that is, get a tune. Modding your Evo X will noticeably throw off your engine's performance due to not being properly tuned.

 

Damn! '10 SE was running near 23 psi stock, and 29 psi with the crappy Perrin stage 1.

 

Stock boost is between 21-23 PSI (PSI's)

 

I'm running 27-29psi with stock block/internals. With just bolt ons from ams shown in my sig. However I am tuned.

 

Awesome. Thanks guys. I'll take my car to my mechanic to get looked at. That's what I get for buying a used car. Hopefully I get it figured out soon.

 

Same thing here. Going to have mine looked at since it was used and not modded by me.

 

Hopefully you figure your car out soon. It just sucks. I was so happy finally getting another Evo and it's not performing like I hoped. I just dont understand why some people feel the need to come into someones thread and try be a bunch of turds. It's not like they were born with all this knowledge. I haven't had a turbo car in almost 3 years so I forgot a lot of stuff about turbo.

There are a lot of good people on here but there are always a few bad eggs who have nothing better to than e-jack wagons. Thanks for those who had positive input.

 

....That is dangerously high for a stage 1 tune. I Dont know about the Perrin stage 1, but cobb stage 1 target boost is 24... Get that checked immediately.

Unless you have manually altered something in it to account for that.