turbo4age

yes folks, i read and read and read... but alas, everything is pretty much honda specific so i figure i might be able to get away with asking these couple questions anyway.

i have a bone stock bluetop 4age in my corolla gts, ssautochrome turbo manifold with t3 flange, t3 turbo .48/.46 i believe, and 8 inches of downpipe...

my questions are...

when idling the turbo doesnt spin. im wondering if its because of it being freshly rebuilt? if i pull the throttle even the slightest but it will spin, and while driving it really howls. im not terribly worried, but im wondering if this is common.

next question is in regard to oil lines... i have a ghetto rigged feed and drain and sprayed oil out of the back of the turbo, sorta fixed it with a larger drain line and a needle valve in the feed line... the turbo would emit a little bit of smoke comming off of ~3/4 throttle but otherwise no billowing and no leaking. well i finally game in and ran -4an for the feed and -10an for the drain... from any members experience, will i run into any smoking or leaking problems with this setup without installing a restrictor?

and lastly, my turbo has the adjustable rod on the internal wastegate. i had it where it felt like it was preloaded, and it made little to no boost... loosening it will raise my boost pressure, correct? i know that i should just get in and try it out, but the car is down while im waiting on an AN fitting for my fpr.

any help would be appriciated.

kamilk69

well bigger turbos dont usually spin on idle, and yea turbos tend to be loud, and your oil drain fitting might be below the actualy oil level in the pan causing a back up of oil which causes smoking.

iceracercrx

NO spin at idle, don't worry
Oil line, all depends on the PSI of your motor
Less preload=less power.

Randy

ifly87

Can we get some pics of the beast?

Tough-guy

If a turbo spins faster than a ceiling fan at idle it's probably too small. You don't need that much pressure to the turbo. Some people say 10-20 lbs. I'd say it's more like 5-10 lbs

Tough-guy

BTW the preload is the amount of clamping force on the wastegate flapper holding it shut. more preload=more positive sealing, boost is a function of when the w/g "cracks

turbo4age

for the oil drain problem... the corollas come with a factory oil cooler that has a drain on the pan, so i just drained o there... well its pretty small so i put a -10an fitting at the same exact level on the pan in hopes it will fix the problem. ill make sure to get back to this thread once i find out for sure... and thanks for the reassurance on the turbo not spinning, i figure at idle my engine just isnt pumping enough exahaust to spin the thing.

oil pressure while hot is ~35/40 and it will reach 75psi at redline 7500/7800rpm... thats at the engine, i figure the -4 dumping into a relatively giant -10 will be able to keep pressure at the center section down.

so loosening the actual rod that attatches to the wastegate flapper will lower my boost? and tightening the rod (righty tighty) will raise my boost pressure?

also... is JBweld sufficient for mounting a bov? my local exhaust shop lays some nasty booger welds and i only trust them on my exhaust.

also, thanks for the quick replys

turbo4age

these are some crappy cell phone shots with the turbo on... ill add a couple shots before i painted her and put theturbo on though

Tough-guy

75 psi at the engine might be alright() 75 at the turbo is way too effin' high. and jb weld is not sufficient to hold the boost spikes produced by turbo and closed throttle body. That is on of thise areas I don't recommend you do ghetto-style.

kamilk69

damn i love your gts, i want a rwd boosted car soooo bad now, just getting bored of fwd. maybe ill buy a 500$ 240sx