Interest in Bolt on Turbo kit?

[jakeb]

Some progress on the manifold.  Trying to make it so it is VERY tight to the engine to allow for AC room and also easy to reproduce.



routing for cylinder 2


routing for cylinder 4


I am still not 100% sure on how 1 and 3 will look....
Either cut this T and place in here


Or put the T here...


Runner 3 will then loop up and over #2

I will fully make runner 2...tacked all up.  Then work on #1.
I wasn't very sure how I was going to route everything but this setup should work well.

[jakeb]

More work done on the manifold.  Entire thing is tacked today.  Needs to be sandblasted...and fully welded.  




















sorta out of focus but just to show how tight everything is tucked in.



More...

[beta14ok]

Cool! ...........very Mad-Max...me like.

[romkasponka]

Very bad design...

[Vivek]

Very bad design...

Why?

[romkasponka]

Because of the way how tubes are connected. In case you cannot make equal length tubes it would be much better to connect them  like he was trying before... Another thing you should look at what turbo you will use because for twin scroll turbo manifold should be different configuration.

Something like this http://www.r3vlimited.com/board/showthread.php?t=153442 but better with equal length tubes.

[beta14ok]

Does it matter so much if the Boost limit is 7-9psi?

There have been some successful low boost builds with non-equal length tubes including just a single tube "log manifold". I thought the target here was ~190hp at a low boost limit. I kinda like the chopped & sealed M50 turbo manifold, but there have been probls w/ the build quality aparently.

I'm just learning about such things........... but from what I'm reading, if you want 200+HP and 10+PSI, then equal length joined at a central coupler sounds right.......if lower boost, then it may not matter so much.

[Vivek]

So does this mean that the manifold will limit the boost pressure and maximum power? I'd be interested in Jake's comments on it.

[romkasponka]

I think it will affect spool up time and engine output.

[jakeb]

I built a manifold almost exactly like this for my buddies e21...
Here is a picture of it.


The manifold on the e21 is not using Ts like the one I made above but the routing of the runners is the same.  The e21 is running the same turbo as well.  It spools VERY fast and holds 8-9psi all the way to the rev limiter.  

I would have preferred to build a 4-1 manifold but one aspect of this kit is to keep AC and not have to dent in the fender well for turbo clearance.  There was no room to fit a 4-1 collector as two of the runners would be going directly into the frame rail.

Another reason to use this manifold is the tune is based around a setup with this same manifold.

[jakeb]

The manifold is just about all welded up.  

[wazzu70]

Because of the way how tubes are connected. In case you cannot make equal length tubes it would be much better to connect them  like he was trying before... Another thing you should look at what turbo you will use because for twin scroll turbo manifold should be different configuration.

Something like this http://www.r3vlimited.com/board/showthread.php?t=153442 but better with equal length tubes.

Thats almost exactly what I said on R3V. At that point, just go with a log manifold and save yourself the complexity! I really don't think there is much to gain by making the 4-2-1 like that because the 4-2 connections are at 90deg. At least angle them to merge them!

[jakeb]

Loosely put together on an engine on a stand..





By pass valve










Oil return fitting...this fitting has an O-ring and nut for the inside.  Kit will come with the drill bit to drill a hold in the pan.  This would be a good time to drop the lower pan and make sure there are no loose bolts holding the upper pan on...commong m42 issue.

[unevolved]

Because of the way how tubes are connected. In case you cannot make equal length tubes it would be much better to connect them  like he was trying before... Another thing you should look at what turbo you will use because for twin scroll turbo manifold should be different configuration.

Something like this http://www.r3vlimited.com/board/showthread.php?t=153442 but better with equal length tubes.

Thats almost exactly what I said on R3V. At that point, just go with a log manifold and save yourself the complexity! I really don't think there is much to gain by making the 4-2-1 like that because the 4-2 connections are at 90deg. At least angle them to merge them!

Can you find a log manifold that's readily available and clears AC?

Also, OP, you may want to reconsider that bulkhead fitting for the oil return line.  I've had those fail, no matter how much locktite or elbow grease you put, it'll eventually leak.  No replacement for a welded fitting, and it'll cost you like $20 at a weld shop if you can't TIG aluminum (I sure as hell can't).

[romkasponka]

Return line fitting should be above oil level.