rongconcrx

well i just lost 3psi from getting the down pipe (2.5") welded to the rest of the exhaust2.25" i use to make 7-8psi with just the downpipe alone, but now i can't go pass 5psi. Did the smaller exhaust decrease the psi? i just bought a boost controller as well and tried to increase the boost but it was solid at 5psi and will not go pass 5, ( ihi rh5)

jhmcrx

you got a leak somwhere if the boost controller isnt working...
ps. no offence but why do you still post here when people are just gonna flame you?

rongconcrx

flame me for a stupid question? well, i just ask a question that im confuse about . but there is no leak it was running great with the down pipe alone, but it was too loud thats why i decided to get it attach to the rest of the exhaust.
but when its detach i get the 7-8psi. im thinking that the problem is that the exhaust is too small.

jhmcrx

no not about the question i just remember in the past people just didnt like you? anyway did you try disconnecting the DP after you connected the exhaust to see if the psi goes back up?

whiterice

u running a cat?

rongconcrx

yes, i have tried disconnecting the dp and the psi did went back up to 7-8psi.
yes iam running a stock cat.
but when i connect the downpipe to the full exhaust, i lose 3psi.

and on the flaming part and who ever don't like me, i really don't care, since lots of my friend knows my pw for this account , they like joking or do stupid things with my account, so some of the past post it wasn't me.
but o well..

jhmcrx

well i think whiterice could be right, your cat is restricting too much so buy/make a stright pipe

bumblezc

I ran a stock cat and 2.5 DP with 2.25 exhaust for a while. I still hit 8psi no problem.

whiterice

you could turn up the mbc and get the psi back. i had the same as bumble, but when i put a test pipe in, i gained 3 psi.

bumblezc

I run open DP at the track everytime I went and still held at 8 psi. No major spikes or creep. Just good old fashion fast spooling!