JRW'S 91 318is turbo build

[wazzu70]

Interesting intake manifold. I have been searching out design options for an upgraded intake manifold for my Turbo M42, since I've heard from multiple people that it becomes a weak link in the flow path around 300bhp, I can't weld aluminum though, which is a problem.

There is no way the stock manifold is a weak link around 300hp on a turbo engine. Where would the restriction be?

There are advantages to making a short runner unit like JRW did though. It will give you better top end and of course the IC outlet routing is cleaner. The different throttle body is nice too.

[MoMansi]

the intake manifold is really interesting for N/A use, i love it, i guess the bigger air box will help more on the top end for the turbo, i'm no FI expert though...

[unban me please]

This is JRW....Have a few updates but for whatever reason I was banned from the forum. So if a mod see's this please explain why I was banned.

[bmwman91]

Hey JRW, not sure what's going on, it looks like you should have full permissions. If you are still stuck let me know and I'll keep looking into it.

[DesktopDave]

I think he's OK. I was testing a ban on Yahoo.com and forgot to remove it. It's fixed now.

Sorry for any trouble!

[Darky]

Hi

Any reason your using the standard brake master cylinder, actually less than standard that's a 318i type.

Cheers Rohan

[jrw21]

Hi

Any reason your using the standard brake master cylinder, actually less than standard that's a 318i type.

Cheers Rohan

Hey Rohan

That is actually a master cylinder from a 1974ish VW Rabbit. The bore size is perfect for booster-less setups.

[jrw21]

I'm back guys! Have a ton of updates but I will get to those later...But, here is a huge milestone!

First start!

http://vidmg.photobucket.com/albums/v83/whitebred21/20160315_181900_001_zpsgqkwdxlf.mp4

[keflaman]

What a neat and tidy install! Looks great, man!!

[Darky]

Nice work!

[varg]

There is no way the stock manifold is a weak link around 300hp on a turbo engine. Where would the restriction be?

The general design could hamper flow at the top end. As I stated, it's what I've heard from 2 separate people who have themselves done the whole 300whp thing before. I have no way of verifying it, short of building a custom manifold and doing back to back dyno runs I could not be sure, but given the design of the manifold, it seems reasonable. I have a turbo and a fuel system that's easily capable of it but I still don't have a TIG welder so we'll see if I'm able to break 300whp with a stock manifold, I will certainly post my findings if I do.

[Delta]

Awesome build!

I'm really interested in that oil cooler cap. Looking into other style caps on the market none of them say anything about the m42. Ireland says that theirs doesn't work, so I'm intersted in how you got this one to work. Particularly, what oil filter element did you end up using? I plan to get a similar cap from Rally Road for their s52 fitment.

Im sure many others would be interested in this as well!

[Darky]

Be interesting to see what you do with regards to the oil filter cap. I know those filter caps fit, however from memory they couldn't find a filter to work either to tall or short. But perhaps a spacer might work!

[Delta]

I ended up sending an email out to the guys at Rally Road and asked them if their m50 oil cooler cap would work with our motors. They got back to me last night and said that they can have an o-ringed spacer machined for the bottom of the filter housing that allows the use of a newer cartridge filter. Definitely give those guys a shout!

I'm probably going to be getting the cap and spacer from them sometime later this year. Glad there is actually an easier/cheaper option than the mocal diverter plate!

[Darky]

Which gearbox did you end up using?