a4ls2goat

Interested in seeing what this turbo does

Tomhames

iTrader: (3)

Bearings look great Matt. Thanku for the updates. Keep truckin'

408GT

iTrader: (2)

Sweet! Can't wait to see the new combo, and hate that the old one let go.

93hatch

iTrader: (9)

needs another gate

dt23400

iTrader: (1)

Quote:
Originally Posted by Photochop View Post
Whats on this setup for PCV? Have you had any oiling issues with this build or others and what do you do to remedy it?
i just leave the valve cover vents open, no issues

denmah


do you put any type of breather system in place or hose to direct any blow by you may get? im at the point of my build where i dont know if i need a catch can or not. thanks

Photochop

iTrader: (74)

I assumed he just used a couple breathers, metco or similar on driver side and a couple little ones at the stock PVC hose locations

Photochop

iTrader: (74)

Wow, terrific carnage. Sucks you don't know what happened, and really sucks you didn't get a chance to see what that combination was good for. New combo sounds promising though. Was the lead going to the wastegate melted? It's in a high heat location, figured thats what caused it. Whats the thought process on dealing with possible future boost control issues?

denmah

iTrader: (2)

wastegate lines are fine, wastegate is fine,

i tested boost solenoid but ill re-test again once its together and running

Tjabo

Did you have water/methanol injection on this setup or not Matt? And what fuel were you running when it happened?

I'm just curious how many octane safety nets were in place when the kablammo happened. Seems like potentially an interesting data point.

93hatch

iTrader: (9)

Gate priority bad, Itll just do it again and not show on dyno

denmah

iTrader: (2)

so if gate priority is bad, how is it not a problem on 7psi, and how was it not an issue all day, and for months prior to this?

denmah

iTrader: (2)

strait 91 octane, no methanol

Tjabo

Thanks Matt!

twinturbo496

iTrader: (2)

Matt,

Do you run any sort of air filter?

The coil on the 4 port valve you are using for boost control is tiny, it can't really generate very much force. I wonder if after thousands of street miles without any filter one tiny bit of sand/dust/crap from the intake manifold could make its way into the valve and make the spool sticky, resulting in unreliable boost control?

93hatch

iTrader: (9)

Hooking at track in 3d gear isn't same as street. Add another ching Chong gate and t them

denmah

iTrader: (2)

there are certainly lots of possibilities haha, but boost valve is working fine, i tested it again when i tore it down, ill test it again when its running again.

this 250k mile 6.0 i got as a replacement i tore down, and the top ring gap is 17-20 on nearly all of them, *didnt get them all out yet*

im pretty surprised after 250k that some are that tight!

certainly would cause an issue on 14+psi and strait pump gas in my opninion

denmah

iTrader: (2)

my datalogs show boost flat, no problem in high on the track with the tire, still level at 6psi

then i turned my **** on that one pass and it was dead even 8 then dead level 12psi

so no issues in high, foot to the floor while adjusting...

93hatch

iTrader: (9)

Assumed it spiked and blew by situation. Needs nitrous

Tjabo

That's crazy! Gonna gap them out a bit then?

Ok, saw the video. Good stuff! I can't wait to see how much punishment this one can take with the rings gapped out appropriately. (and with that big ole' turbo that should blow a lot of air without heating it up quite so much)

orange crate

Can Viren get you a replacement turbine wheel for the 7875 or do you think it's not worth the hassle? That turbo might live quite a while if it isn't out of balance.