Turbo Height For Gravity Oil Drain

[horndog]

OK Guys, Picking up my Turbo tomorrow will commence headers this weekend.

Question: What is the minimum height difference from the Turbo oil drain to the return into the engine to allow sufficient drainage to avoid the need for a scavenging pump?

Any pics appreciated.

[Slowdownjack]

OK Guys, Picking up my Turbo tomorrow will commence headers this weekend.

Question: What is the minimum height difference from the Turbo oil drain to the return into the engine to allow sufficient drainage to avoid the need for a scavenging pump?

Any pics appreciated.

Here's mine.
[attachment=3447]

[Legend]

Make height your first piority.

Centerline of turbo higher than oil filter, atleast 1" or most you can get.

Leonard.

[Maj]

Make height your first piority.

Centerline of turbo higher than oil filter, atleast 1" or most you can get.

Leonard.

Yep at least 1"
good reference is the radiator lower mount sitting on the top of the flange
Here's mine from 04 , shows fairly clearly a position that has worked well for me

[borgy]

holy shitt Maj........ Are you going to feed all your boost into cyl N# 1 through the barrel.........??

[Maj]

LOL .not quite a GM Diesel
You have seen that setup Borgy, been in use since late 04, bit like Granpa's axe though, had several new handles !!!!

[horndog]

Got it! Now the fun starts

[attachment=3455]

Big thanks to Marc Sloan at MTQ Engine Services in Brisbane. Very patient and knowledgeable guy only too willing to help. Thoroughly recommended.

[REVIT13]

let the fun begin! started lindsay's install this arvo.

might have to get one myself now but i'll see how the the 2 of you go this season when it ever begins.

[horndog]

Got the Jig set up today for the headers. I made an adjustable set up so I could move the turbo in and out and up and down to get it looking right. Once I was happy I locked up the nuts and made a jig to build the headers off.
I think I got good height for the turbo to drain well. I can also see now how difficult it can be to retain the stock wastegate set up.
       
Are you guys using 37mm OD pipe for the headers same as the stock header diameter?
I see on the web the most common size for a mandrel bend is 1.5" or 1 5/8" also what radius bends did you use?

How did you set up the mating to the head? Did you use larger pipe (45mm OD) over the smaller pipe for the flanges to push against to hold in place?

[Maj]

Done several sleeving over the pipe (usually 1.5") but its a bugger getting the flange face flat , last set i machined up spigots , fit was tight on a 750 so butt welded the pipes to the spigot, could put the pipe into the spigot on a busa .
Another thing to consider is converting to external wastegate, those internal gates have trouble controlling the boost levels, internal and external will both need porting of the wastegate hole for increased flow.

[horndog]

Thanks Maj, I was thinking I wouldnt need to perform carnage on the turbine housing if I ran the wastegate from the header (pre turbo) provided there is enough room.

The guys at MTQ engine services think that boost creep wouldnt occur on the standard wastegate until about 15PSI, does that sound about right?

Out of interest, how was was the mod done to that housing? Looks like there is not alot of margin left for thread purchase in the housing for the flange.

[Maj]

Just machined to the wastegate flange level, redrill and tap the holes,. fairly quick and easy.you can go all the way thru without probs, just don't have the bolt threads into the exhaust gas area or they may be difficult to get out later
There are several different ways guys have done this sort of mod, not all machine the housing some sink a tube thru the flange plate to mate with the wastegate outlet others weld a divider in , i like to machine it as it leaves more room for the exhaust bend .
on the bikes boost creep shows up more at 8-10 psi than 15 as backpressures help stop the turbo working as easily, std wastegate will boost creep,. usually shows up on a dyno as a flat or rising torque line beyond 8k rpm, should drop off steadily from this point

[Legend]

Another thing I did was to weld up the wastegate hole (using the orginal flap) Then connect the wastegate to the headers via suitable tubing.

Leonard.

[horndog]

Another thing I did was to weld up the wastegate hole (using the orginal flap) Then connect the wastegate to the headers via suitable tubing.

Leonard.

Thanks Leonard, I am thinking thats the way I will go with the wastegate in the headers.

Are you saying you re-used the the actuator and the flap that came with the turbo by putting it in the header area or you welded the original flap shut?

[Legend]

Welded the flap shut, removed the modulator/actuator welded the hole left at the pivot.

Welded a tube to the headers in a convenient location with flange plate(supplied with the aftermarket W/gate) welded to the end of the tube.

Now you should be confused!!!


Leonard.