Actuator Thing Touching Jjr Dump Pipe

[gotRICE?]

Ideas for what?

Your actuator might not be on properly... not much to it (you'll see when you have a look).

Boost not generating means the gate is coming OPEN too early, which means actuator most of the time... or a boost leak/restriction somewhere perhaps

Sorry, should have been specific. I really dont know alot about the turbo workings, so what exactly should i look for? Actuator wise.

[stenve]

alrighty... so i put my highflow cat and jjr split dump pipe on today.

i foudn that my original cat was gutted out haha. so good to get a new one on there.

had to drill out the hole for the sensor at the back of the cat as it wouldnt fit in.

couple of my studs were broken where the dump connects to back of turbo so i'll need to get that fixed.

but for now i just went nuts with gasket goo to keep it sealed.

As for the actuator hitting i didnt get to see it physically touching when i fitted it. but as i get into higher rpm its definatly creeping.

from about 10psi to 12ish once you get over 5000ish rpm.

nothing outrageous but its there

also found out that my old o2 sensor was stuffed.

the old one would read the same voltage all the time. this one actually varies.

now the car feels much nicer and boosts a bit quicker

i just need to sought out the actuator thing. i'll probably take it off and grind it out a little.

or just go get another one. this one only went on as i had it sitting there from my old r33.

[gotRICE?]

why do you bother putting the cat sensor back in at all? Mines just tucked up under the exhaust shield.

Im thinking of modding my JJR split into a non-split. IE cut the wastegat pipe out, weld up the hole at the bottom, tidy up the flange, and make the wastegate pipe similar to the HKS dump. IF it is cost effective. If not, HKS front pipe and OEM dump it is.

Edited October 2, 2008 by gotRICE?

[stenve]

why do you bother putting the cat sensor back in at all? Mines just tucked up under the exhaust shield.

because i didnt have a bolt that would fit in there to stop the exhaust coming out of it. so i had to plug it up somehow

[gotRICE?]

oooh righto i thought it didnt have hole at all and you put one in.. my bad The JJR ones dont have holes at all.

[W0rp3D]

The JJR ones dont have holes at all.

mine does.

[CEF11E]

This is an interesting read.

I bought a split dump/front pipe combo from a trader here years ago called batmbl. it is a stainless steel work of art and cost almost $500 from memory. it has been in use for 3 years and now sits on a massive hiflow bolted to a 30det and it has never creeped infact boost used to be a dead flat line at 18psi when it was on my 20det now the 30det uses more air than the little turbs can huff so boost drops off over 5000rpm.

i was pissed when i first saw the jjr ones as they are about 1/2 the price and looked nearly identical. but this just reinforces the "you get what you pay for"

[Dan_AE86]

Ok guys. another new angle:

Im thinking of just getting the 3" HPI dual front pipe (any other good front pipe brands?) and 3" xforce $175? hi-flow cat and use the stock dump (still stock turbo running EBC lo=6.5psi, hi=9.5psi), then when i upgrade my turbo later with higher boost it will either be a hi-flow GCG item $1900 or a KKR430 $890? all depends on the money at the time!but leaning more towards the KKR...so when i figure that out i'll do the dump to suit!

Do you guys think i will still gain a fair bit from the 'redback' cat and stock front pipe i have now?(i currently have a Jasma Catback!)

**Also**

An EBC question:

i have a Greddy Profec B Spec 2 and it holds boost fine but it does spike a couple of PSI when i smash through the gears...is this normal/anything to worry about?how do i fix it without losing boost when WOT?

Thanks in advance,

Dan.

[WET-25T]

Ok ive found something interesting. My turbo for the past couple of weeks has sounded different and instead of the normal 10psi it only makes it to 7 or 8 psi.

Im checking the usual things today and started with taking the cat off and dump/front pipe to see if there were any parts of the wheel in the cat (there wasnt).

Anyway i took the jjr dump/front pipe completely off and put my stock dump pipe on to see how much the actuator opened. It opens pretty much the same amount it does with the jjr dump.

I guess i was wrong with that being an issue or has nissan f'ed up as bad as jjr?

Anyway if nissan didnt think it was a problem then i guess ill keep my jjr dump/front pipe unless someone has a better thought on the matter.