fearthedeere

Ive been thinking how i was gonna tackle my over boosting problem, so my question is does timing reduce or ad boost?

gman07

Man, it's been a while since you've posted! How's the truck?

Advancing the timing should decrease boost and EGT's, but cylinder pressures will go up.

fearthedeere

Trucks still a trud

So it looks like im up a certian creek with no paddle oh well i got right foot control and i need all the help i can get.

gman07

You could get a 12 or 14cm wastegated housing, drill the divider out so it wastegates all 6, and set it at 35-40psi with a manual boost controller and sell your 16. I would think you could get a 12cm cheap, but you might run into EGT problems, and a 14 is expensive. Just a thought

fearthedeere

What im thinking is takin a ricer wastegate and riggin it on my manifold.

spunbearing

Couldn't you install a blow-off valve in your intercooler pipe going to your intake? Just a thought... maybe theres a reason not to do that.

ihpower

i had to advance my timing a lot to get the boost down. i was about to make 55 lbs of boost with 1/8 on the timing, now i have the pump bumped up were the pump is pretty close the the motor(cant even fit my finger between the two) and now it will top out at 39.

G1625S

Wait 'till you bump the timing gear a tooth and the pump starts to get close to the head I think my pump is just a turd rebuild, though

ChrisLib

Fear, you might want to find a way other than just timing to drop the boost, when you advance the timing the boost drops because more of the heat/combustion fire is taking place in the cylinder, that in turn cools your exhaust(lower egts) and you get lower boost because the exhaust velocity has dropped. BUT here is the kicker...your cylinder pressure`s are higher as a result, hence the increased rattle, lack of the wet dog shake at shutdown. All I`m saying be carefull, too much of a good thing...welll you know that saying. Head gaskets get kind of cranky with super high cyl psi`s. Speaking of timing...is it normal for it to sound like a 24v when the timings cranked? Mine is a shade over an 1/8.

wannadiesel

There is. We want to reduce boost not only to protect the head gasket, but also to prevent overspeeding the turbo. If we limited boost by blowing off excess pressure, we could overspeed the turbo very easily. The purpose of a BOV is to prevent turbo stall when the throttle is closed (or the engine is defueled on a diesel). The turbo retains more speed for less lag when the driver gets back on the gas.

spunbearing

Makes sense.

fearthedeere

Thanks guys, im gonna rebuild my engine and what not when i have dead engines, by then i should have money for studs 60valve springs and a gated housing of somesorts.

bgilbert

Rebuild your engine???

fearthedeere

well not techinally rebuild, but fix and whatnot

Underpsi

You mean your just gonna fix the head gasket when it goes?