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e21 315 => 335i turbo

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stefankj
Upcoming E21 fanatic
Posts: 40
Joined: Thu Nov 30, 2006 3:27 pm
Location: Reykjavík, Iceland

e21 315 => 335i turbo

Post by stefankj » Wed Mar 30, 2016 1:58 am

Hi guys

I've been a member for a while but never made a thread about my car so here it goes. The car is a 1982 315 with 138k km on the clock.
I can tell you the story why I bought a e21. When I was younger I walked past a e21 everyday on my way to school, it was a clean blue 323i and I loved that car and thought to myself someday I will buy myself a e21, but since I live in Iceland there are very few e21's left on the streets so when I saw my e21 for sale I had to buy it even though it was only a 315. And then this whole project started, first I bought the m30b35 for the swap and was just going to swap it in, then I found a e23 745i turbo kit for sale and bought that to put in as well, but then desided to sell that kit and go for something bigger... so here I am, in too deep and trying to piece this car together, here is where I am with this today.

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1982 315

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uwbuurman
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E21 VIP
Posts: 15417
Joined: Fri Jun 12, 2009 4:49 pm
My E21(s): 1978 type 1 323i 5speed dogleg Polaris
Location: Ljouwert

Re: e21 315 => 335i turbo

Post by uwbuurman » Wed Mar 30, 2016 7:39 am

Serious project!!
It's the man next door!

1978 BMW 323i
1980 BMW 528i
1987 BMW 325iA cabriolet
2006 BMW 320d touring High Executive
2015 BMW 320dA touring xDrive High Executive ///Msport

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polov8
E21 Fanatic
Posts: 465
Joined: Wed May 29, 2013 6:30 pm
My E21(s): '83 Polaris silver 316
Location: Dronfield

Re: e21 315 => 335i turbo

Post by polov8 » Thu Mar 31, 2016 6:39 pm

I'm liking the diff plate double mount thingy, great project!
Andy

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TopCat
E21 Pro
Posts: 1077
Joined: Thu Apr 21, 2011 2:21 pm
My E21(s): 1980 Alpina B6 2.8
Facebook page: https://www.facebook.com/timothy.c.boles
Location: Isle of Man and Inverness
Contact:

Re: e21 315 => 335i turbo

Post by TopCat » Thu Mar 31, 2016 8:58 pm

love it!
Regards
Topcat
Isle of Man Inverness
1980 BMW E21 Alpina B6 2.8
1991 BMW E30 Hartge H26

pandemonium001
E21 Pro
Posts: 527
Joined: Sun Oct 07, 2012 1:19 pm
My E21(s): E12 535i T (ish)
Location: Scotland Ayrshire

Re: e21 315 => 335i turbo

Post by pandemonium001 » Tue Apr 26, 2016 1:15 pm

warmest of Welcome's

Thats one sturdy diff mount!!

what turbo is that HX52 with 11cm turbine housing?

Interesting idea with the remote manifold for the wastegate/fuel reg & dump valve. why not just drill and tap the alloy manifold?

remember pictures pictures and more pictures.

:thumbsup

E21noob
E21 Fanatic
Posts: 355
Joined: Sat Jul 05, 2014 11:46 pm
My E21(s): SOLD
Location: Oslo, Norway

Re: e21 315 => 335i turbo

Post by E21noob » Fri Apr 29, 2016 9:54 am

Love the idea of the diff mount! Any more pics and details on that?

stefankj
Upcoming E21 fanatic
Posts: 40
Joined: Thu Nov 30, 2006 3:27 pm
Location: Reykjavík, Iceland

Re: e21 315 => 335i turbo

Post by stefankj » Wed May 25, 2016 2:11 am

some progress, downpipe and some bootwork, The turbo I'm using is borg warner s360 T4

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1982 315

stefankj
Upcoming E21 fanatic
Posts: 40
Joined: Thu Nov 30, 2006 3:27 pm
Location: Reykjavík, Iceland

Re: e21 315 => 335i turbo

Post by stefankj » Sat Aug 27, 2016 12:02 am

Time for some update.

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Hoses and oil-cooler

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Air and breather filters

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Rear disc brake conversion using 323i discs and audi calipers( girling 36) with integrated handbrake, the standard cables can be used with some modification.

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Main battery switch, three switches for fuel pumps, wideband and a small tablet wich connects wia bluetooth to megasquirt.

Need to finish the exhaust system now...
1982 315

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croma_man
E21 Pro
Posts: 590
Joined: Fri Sep 07, 2012 1:18 pm
My E21(s): '83 EU 327i
Location: Slovenia (EU)
Contact:

Re: e21 315 => 335i turbo

Post by croma_man » Sat Sep 03, 2016 9:09 pm

china intercooler? I have a similar thick one on my turbo passat project, massive problems with the intake temperature as it doesn't cool the air (too thick or too low flow)...they told me never to save money on intercoolers, and its true.

stefankj
Upcoming E21 fanatic
Posts: 40
Joined: Thu Nov 30, 2006 3:27 pm
Location: Reykjavík, Iceland

Re: e21 315 => 335i turbo

Post by stefankj » Sat Sep 03, 2016 9:33 pm

croma_man wrote:china intercooler? I have a similar thick one on my turbo passat project, massive problems with the intake temperature as it doesn't cool the air (too thick or too low flow)...they told me never to save money on intercoolers, and its true.
This cooler is not cheap and not from china, this one is a upgrade for a 335i or 135i with twin turbo n54( two small turbos generate/transfer more heat than a single large), I have put this same cooler in a modded e90 335i and we saw a very nice intake temperature drop from the stock cooler so I'm not even a little worried about this one for my setup.
1982 315

stefankj
Upcoming E21 fanatic
Posts: 40
Joined: Thu Nov 30, 2006 3:27 pm
Location: Reykjavík, Iceland

Re: e21 315 => 335i turbo

Post by stefankj » Wed Sep 14, 2016 1:43 am

Some info about motor modifications

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Oil squirt-nozzles for piston cooling installed(same as in 745i and alpina b10 biturbo) and the block honed and decked 0,3mm

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Alpina B7 turbo pistons installed with 745i rings gapped for extreme cylinder pressure

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ARP head studs and MLS gasket

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New valve springs (stock on right new on left)

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Custom grind special turbo camshaft from Paul Burke

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Cam specs
(
Head also has rocker arm locks, and the throttle body i'm using is 90mm(stock is 68mm), injectors are 695cc/min(66lb)
1982 315

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