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12-09-2014, 06:39 PM | #89 |
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Miscommunication. He found some on ebay but wasn't sure it was worth the investment. I apologized for not making it more clear I would buy the cams if he found some. He found a number of sets on ebay, my shop hasn't got back to me yet, and there's always the new parts option.
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12-09-2014, 06:40 PM | #90 |
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Dunno, maybe. That's why I want to get a set of cams to them for evaluation. Seems like it's worth a shot anyway.
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12-10-2014, 12:38 PM | #91 | |
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Funny thing with UUC. VAC ordered a SSK for my brother's 335i from them, and UUC sent the wrong part # THREE times in a row after VAC repeatedly told them it was the wrong part number. What a nightmare, UUC really does suck lol |
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12-15-2014, 02:42 PM | #92 |
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Ordered cams today, supposed to be in tomorrow morning. Will ship to Todd and see what he has to say. FYI
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12-15-2014, 03:19 PM | #93 |
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12-15-2014, 03:35 PM | #95 | |
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I'd also still be weary of the complexity of Valvetronic making the profiles hard to design. It's not as simple as a standard DOHC setup where the cam directly presses on the lifter, or even a pushrod or SOHC with a simple rocker arm.
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Last edited by Freon; 12-15-2014 at 03:40 PM.. Reason: clarity |
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12-15-2014, 07:46 PM | #96 | |
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12-16-2014, 05:03 PM | #98 |
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Picked up the intake cam this afternoon, the exhaust cam didn't make it but will be in tomorrow morning. Here're some pics of the lobes and the ends. The minimum thickness of the lobes is right at 0.200" and the wall thickness of the cam itself is quite a bit more than I expected.
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12-16-2014, 06:37 PM | #99 |
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Nice and Shiny, lets all hope they can be reground
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128i Sport 6MT converted to Euro 130i spec, 3.73 diff, tuned by evolve ~220 whp 207 wtq(ft-lb) SAE
In-progress: //M front arm, M3 rack, e36M lip Wishlist: Coils, n55 mnts, headers, LSD, e60 finn diff "The 1-series is the last car that BMW engineered before the Germans, as a car-making culture, fell out of love with driving." - R&T 2013 135is |
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12-17-2014, 09:40 AM | #101 |
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Oh yeah, much heavier than you'd expect. It'll survive the regrind process without the slightest problem. The only issue remaining is surface hardness changes induced by the grinding which Todd is very familiar with and aren't really a worry although they will limit how much can be ground off. There doesn't appear to be a way to carburize or otherwise reharden surfaces without destroying the cam as far as I can tell anyway.
I'm going to request a performance grind to work with a stock engine so I can have them installed and evaluated on the dyno and the street. I talked with the guys at the dealership yesterday and the cost of a full race engine rebuild will be less than I thought so with custom pistons, race valves, head work, etc., the cams will be reground again to accommodate higher than stock lift, 8000rpm redline, and 11.5:1 compression ratio. That'll yield a part everyone can order for street use and one for higher performance assuming there's anyone else out there as stoopid crazy as me who wants a street/track perf'ed N52. And really what're the odds on that??
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12-17-2014, 07:35 PM | #102 | |
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I would email Noelle/Hartage and get their 3.2 n52 330i speck kit on the reduced price after crying for weeks. Tune it under custom software though - cuz their is MSV70
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128i Sport 6MT converted to Euro 130i spec, 3.73 diff, tuned by evolve ~220 whp 207 wtq(ft-lb) SAE
In-progress: //M front arm, M3 rack, e36M lip Wishlist: Coils, n55 mnts, headers, LSD, e60 finn diff "The 1-series is the last car that BMW engineered before the Germans, as a car-making culture, fell out of love with driving." - R&T 2013 135is |
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12-17-2014, 08:44 PM | #103 |
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Well, yeah, there is that. But it's dependent on the crankshaft design, not something I want to risk really. And the cost is extreme for increasing bottom end torque while making it more difficult to raise the redline. We might knife-edge the crank but that's about as radical as I'd want to go right now.
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12-18-2014, 10:46 PM | #104 |
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Picked up exhaust cam midday today. Here're some pics. The minimum thickness of the lobes is about half that of the intake cam at 0.100" and the thickness of the camshaft itself is about 0.132" as measured with a pair of calipers.
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12-19-2014, 06:17 PM | #105 |
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@justpete how can you tell which one is inlet vs exhaust cam?
My part search for some reason got them backwards- thin as inlet, thick as exhaust..
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In-progress: //M front arm, M3 rack, e36M lip Wishlist: Coils, n55 mnts, headers, LSD, e60 finn diff "The 1-series is the last car that BMW engineered before the Germans, as a car-making culture, fell out of love with driving." - R&T 2013 135is |
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12-19-2014, 07:34 PM | #106 |
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Thanks, you're right. I checked RealOEM and the thin is the intake and thick is exhaust. Thin is the p/n ending in 663 and the thick is 665.
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12-20-2014, 07:24 PM | #108 | |
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Except the nose lifts the valve so I'm guessing removing material from the heel and calibrating this as the closed point on the Valvetronic eccentric rotation increases the valve lift by the lever arm multiplication times the increased diameter difference. A 1mm lift increase would then require grinding off about 24.6mils from the heel, only 25% or so, doesn't seem too extreme but I don't have any real idea to be honest. All this sound right?
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