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#16 |
שמע ישראל
Join Date: May 2010
Location: 24477, Virginia
Posts: 12,002
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I have done much research along these lines.
Always wanted to slam an M30 block out to 94mm, run flat top VW pistons, M90 head (maybe bigger valves for lulz), crank, cam (maybe go hotter on the cam), E21 manifolds. I've got an 83 M90 head and a few B34 blocks laying around. VW pistons are cheap cheap cheap. Trying to find my thread on this combo on Mye28 as we speak.
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1974.5 Jensen Healey : 1989 RX7 : 2003 330i/5 : 2007 335i/6 : Land Rovers
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#17 |
שמע ישראל
Join Date: May 2010
Location: 24477, Virginia
Posts: 12,002
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Forgive me, I wasn't as "into" these cars as I am now. I was still young. Gave up on that idea when I scored a B35 for cheaps and slammed it into my e28, thus ended thread.
Slammin's M90/VW/M30 WTF thread
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1974.5 Jensen Healey : 1989 RX7 : 2003 330i/5 : 2007 335i/6 : Land Rovers
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#18 | |
R3V OG
Join Date: Nov 2010
Location: atlanta
Posts: 7,717
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Quote:
My buddy built one although it hasn't run yet. I don't think he would do it that way again. The VW pistons protrude quite a bit over the deck with the B35 crank and valve to piston clearance is very tight. |
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#19 | |
שמע ישראל
Join Date: May 2010
Location: 24477, Virginia
Posts: 12,002
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Quote:
So the B34 crank would be the same, BUT If I can get my hands on an M90 crank we'd probably be in business? Stroke of 84mm vs 86mm w/B34 crank.
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1974.5 Jensen Healey : 1989 RX7 : 2003 330i/5 : 2007 335i/6 : Land Rovers
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#20 | |
R3V OG
Join Date: Nov 2010
Location: atlanta
Posts: 7,717
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Quote:
I will test the memory of my friend and see what he remembers about the details. I did a lot of consulting during the build but i cant remember. I have a M90 crank that i prob would sell. My folks still live in D.C. i could deliver if you are semi patient, Maybe. |
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#21 |
שמע ישראל
Join Date: May 2010
Location: 24477, Virginia
Posts: 12,002
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Hmmm....I'm very patient. I've been meaning to get my hands on an M90 crank, but things never line up for me.
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1974.5 Jensen Healey : 1989 RX7 : 2003 330i/5 : 2007 335i/6 : Land Rovers
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#22 |
R3V OG
Join Date: Nov 2010
Location: atlanta
Posts: 7,717
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OK. Here are the details on my friends build. M90 block, B35 crank and rods, 94mm VW pistons, stockish B35 head with schrick 284 cam. Thick M90 headgasket ( i remember 1.7mm thin and 2.1mm thick)
The block and the deck were not cut much, the thick headgasket was needed to get piston to head and valve to piston clearance to be (barely) in the safe range. Piston sticks out of the deck 1mm or so. Compression ratio is at 9.0 to 1 ish. |
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#23 |
Forum Sponsor
Join Date: Apr 2004
Location: Fort Lauderdale
Posts: 2,053
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You can port the M90 intake side to match the B35 intake manifold. That's what I did.
Switch to the B35 cam to make the distributor work. ![]() You can make your adjustable cam gear with a rat tail file just open up your original cam gear. ![]() You will have to knock the dowel pin out. ![]()
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Need a Turbo manifold? We have them in stock- Click here---> http://rapidspoolindustries.com/ ____________________________ E-mail Panayiotisx2@gmail.com Dyno vid http://www.youtube.com/watch?v=C7aM7..._order&list=UL |
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#25 |
Forum Sponsor
Join Date: Apr 2004
Location: Fort Lauderdale
Posts: 2,053
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I have washers under the allen head bolts, it has never moved. Not sure on a the double row, can't see why you couldn't.
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Need a Turbo manifold? We have them in stock- Click here---> http://rapidspoolindustries.com/ ____________________________ E-mail Panayiotisx2@gmail.com Dyno vid http://www.youtube.com/watch?v=C7aM7..._order&list=UL |
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#27 | |
Forum Sponsor
Join Date: Apr 2004
Location: Fort Lauderdale
Posts: 2,053
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Quote:
I did it for my turbo set up to adjust exhaust pressure to spool the turbo.
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Need a Turbo manifold? We have them in stock- Click here---> http://rapidspoolindustries.com/ ____________________________ E-mail Panayiotisx2@gmail.com Dyno vid http://www.youtube.com/watch?v=C7aM7..._order&list=UL |
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#29 |
Forum Sponsor
Join Date: Apr 2004
Location: Fort Lauderdale
Posts: 2,053
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No problem, the cool thing about the M90 is that the bottom end is exactly like the M88.
Stock they put out 218hp & 228ftlbs, great engine. 84mm stroke 93.4 bore. Plus it has more displacement than the B35... "The M30B35 635 engine has a displacement of 3430 cc while the M90 has 3453cc"
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Need a Turbo manifold? We have them in stock- Click here---> http://rapidspoolindustries.com/ ____________________________ E-mail Panayiotisx2@gmail.com Dyno vid http://www.youtube.com/watch?v=C7aM7..._order&list=UL |
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#30 |
R3V OG
Join Date: Apr 2008
Location: fan franfisco
Posts: 12,551
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So, do you think Motronic 1.3 cam and intake/injectors/management is better enough than L-Jetronic everything to justify the upgrade? Will I need a Miller MAF/WAR chip or some other piggyback to tune it?
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