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11-23-2014, 01:52 PM | #1 |
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N52 performance cams
Searched, didn't find anything definitive other than locking Valvetronic at max lift and replacing the OE DME with a Motec ECU.
Cat Cams offered to develop a Valvetronic compatible performance cam if I could send them a functional cylinder head and Schrick responded with links to their catalogs that are 404 dead. Nothing online but thought they might have something off-catalog. VAC didn't have anything but I think Cat Cams makes all their cams anyway. Turner sells Schrick but doesn't list anything just like Schrick's site. Anyone have some suggestions where else to look? Or know of existing Valvetronic compatible performance cams? TIA
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2011 E90 328i 6MT, BMW Aero, CF hood/boot, PI+CAI+RM+3IM+BPC, SS+CI528+ThermoTec+SS#1+2XBurns, AKG 75D eng/trans, Al/Delrin diff/RS, CM 850, UCP, CAE, AKG DSSR, DiffsOnline 3.91 30/90 LSD+BW cooler, C&R, Setrab, Accusump, AST 3-way+Swift, Aurora PR+BW spherical, Vorshlag CPs, M3 brace+UR bar, ARC-8 18x8.5, 255 R1R, RB/CSL rotors+cooling, 135i calipers, RS29, RT700, Safecraft, OMP HTE-R+804F+QD Superquadro, 6pt cage+FIA, Braille, RT DL1Mk3
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11-23-2014, 02:21 PM | #2 |
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Didn't Schrick have some kind of n54 cam on their german catalogue that looked as if it was mis-labelled and maybe was for a n52. There are images that exit on n54 boost of a n52 and cams in development by schrick from years ago
@TheAxiom was sniffing around that thread I think Valvetronic cams would be awesome - if there are enough committed people - look at the AA header pre-buy list
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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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11-23-2014, 05:46 PM | #3 |
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I had thought VAC made some cams for an N52, a while back though. I think they were sending them to a race team or something.
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11-23-2014, 06:00 PM | #4 |
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VAC has reinforced Pistons or did on their page
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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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11-23-2014, 08:41 PM | #6 |
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Can we not get OEM spec cams reground for more lift or other features?
If this is possible & desirable - its easier than gettign a company to make custom ones - n52 cams already are as light weight as possible
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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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11-23-2014, 09:25 PM | #7 |
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But it would require adding material to the cam lobes so they could be reground for more duration and lift. Likely to require different pistons for clearance, etc. Gets complicated if increasing compression ratio. Ain't cheap either way though.
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2011 E90 328i 6MT, BMW Aero, CF hood/boot, PI+CAI+RM+3IM+BPC, SS+CI528+ThermoTec+SS#1+2XBurns, AKG 75D eng/trans, Al/Delrin diff/RS, CM 850, UCP, CAE, AKG DSSR, DiffsOnline 3.91 30/90 LSD+BW cooler, C&R, Setrab, Accusump, AST 3-way+Swift, Aurora PR+BW spherical, Vorshlag CPs, M3 brace+UR bar, ARC-8 18x8.5, 255 R1R, RB/CSL rotors+cooling, 135i calipers, RS29, RT700, Safecraft, OMP HTE-R+804F+QD Superquadro, 6pt cage+FIA, Braille, RT DL1Mk3
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11-23-2014, 09:56 PM | #8 |
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Does it always have to add material?
I was referring to these e36 cam regrinds http://www.westcoastriots.com/
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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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11-23-2014, 10:09 PM | #9 | |
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BTW, turns out I pinged VAC but never heard back so I pinged em again.
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2011 E90 328i 6MT, BMW Aero, CF hood/boot, PI+CAI+RM+3IM+BPC, SS+CI528+ThermoTec+SS#1+2XBurns, AKG 75D eng/trans, Al/Delrin diff/RS, CM 850, UCP, CAE, AKG DSSR, DiffsOnline 3.91 30/90 LSD+BW cooler, C&R, Setrab, Accusump, AST 3-way+Swift, Aurora PR+BW spherical, Vorshlag CPs, M3 brace+UR bar, ARC-8 18x8.5, 255 R1R, RB/CSL rotors+cooling, 135i calipers, RS29, RT700, Safecraft, OMP HTE-R+804F+QD Superquadro, 6pt cage+FIA, Braille, RT DL1Mk3
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11-23-2014, 10:27 PM | #10 |
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"Regrind" usually involves cutting the base circle of the cam, then using thicker shims or buckets to bring lash back to spec. This increases the peak lift on the camshaft by the depth of the cut. Then consider any rocker arm ratio. Just a few millimeters can be significant.
This is probably a nightmare with Valvetronic due to the extra mechanical complexity. It doesn't seem common practice on modern engines.
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11-23-2014, 10:55 PM | #11 | |
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2011 E90 328i 6MT, BMW Aero, CF hood/boot, PI+CAI+RM+3IM+BPC, SS+CI528+ThermoTec+SS#1+2XBurns, AKG 75D eng/trans, Al/Delrin diff/RS, CM 850, UCP, CAE, AKG DSSR, DiffsOnline 3.91 30/90 LSD+BW cooler, C&R, Setrab, Accusump, AST 3-way+Swift, Aurora PR+BW spherical, Vorshlag CPs, M3 brace+UR bar, ARC-8 18x8.5, 255 R1R, RB/CSL rotors+cooling, 135i calipers, RS29, RT700, Safecraft, OMP HTE-R+804F+QD Superquadro, 6pt cage+FIA, Braille, RT DL1Mk3
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11-24-2014, 03:51 PM | #12 | |
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Regrinds might work, but who will be the first? And the cams may be hollow and have less material to remove from the base circle. |
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11-24-2014, 04:20 PM | #13 | |
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11-24-2014, 05:11 PM | #14 |
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Heard from VAC this afternoon. They have blanks apparently and are waiting on at least duration, if I understand them correctly. I've asked if there is an active design going on and what can be done to help.
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11-24-2014, 05:19 PM | #15 |
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In theory, you could have material added to the lobe to increase the effective lift/duration - but I like the idea of blank cams more. One guy saw 10-15whp gains on his M54 E46. And that was with an off the shelf tune and stock crappy heads. Who knows what our motors can do.
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11-24-2014, 05:30 PM | #16 | |
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2011 E90 328i 6MT, BMW Aero, CF hood/boot, PI+CAI+RM+3IM+BPC, SS+CI528+ThermoTec+SS#1+2XBurns, AKG 75D eng/trans, Al/Delrin diff/RS, CM 850, UCP, CAE, AKG DSSR, DiffsOnline 3.91 30/90 LSD+BW cooler, C&R, Setrab, Accusump, AST 3-way+Swift, Aurora PR+BW spherical, Vorshlag CPs, M3 brace+UR bar, ARC-8 18x8.5, 255 R1R, RB/CSL rotors+cooling, 135i calipers, RS29, RT700, Safecraft, OMP HTE-R+804F+QD Superquadro, 6pt cage+FIA, Braille, RT DL1Mk3
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11-24-2014, 05:55 PM | #17 | |
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Mild cams with 11mm lift and more duration would probably still be streetable and have no negative side effects. |
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11-24-2014, 08:09 PM | #18 | |
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2011 E90 328i 6MT, BMW Aero, CF hood/boot, PI+CAI+RM+3IM+BPC, SS+CI528+ThermoTec+SS#1+2XBurns, AKG 75D eng/trans, Al/Delrin diff/RS, CM 850, UCP, CAE, AKG DSSR, DiffsOnline 3.91 30/90 LSD+BW cooler, C&R, Setrab, Accusump, AST 3-way+Swift, Aurora PR+BW spherical, Vorshlag CPs, M3 brace+UR bar, ARC-8 18x8.5, 255 R1R, RB/CSL rotors+cooling, 135i calipers, RS29, RT700, Safecraft, OMP HTE-R+804F+QD Superquadro, 6pt cage+FIA, Braille, RT DL1Mk3
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11-24-2014, 08:55 PM | #19 |
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I wonder what the headflow is on the N52! Still, M50 intake manifold would probably be enough to add some power, the problem is making it fit. Can't wait to see what you can manage.
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11-24-2014, 08:58 PM | #20 |
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Well, there is that one running a custom manifold with E36 ITBs (I think) with a flowed stock head iirc. We'll see but I'm guessing VAC has a lot better things to do.
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2011 E90 328i 6MT, BMW Aero, CF hood/boot, PI+CAI+RM+3IM+BPC, SS+CI528+ThermoTec+SS#1+2XBurns, AKG 75D eng/trans, Al/Delrin diff/RS, CM 850, UCP, CAE, AKG DSSR, DiffsOnline 3.91 30/90 LSD+BW cooler, C&R, Setrab, Accusump, AST 3-way+Swift, Aurora PR+BW spherical, Vorshlag CPs, M3 brace+UR bar, ARC-8 18x8.5, 255 R1R, RB/CSL rotors+cooling, 135i calipers, RS29, RT700, Safecraft, OMP HTE-R+804F+QD Superquadro, 6pt cage+FIA, Braille, RT DL1Mk3
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11-24-2014, 09:06 PM | #21 | |
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Did VAC give a ETA for those cams? You could buy blanks and have Kelford, Cat, Crower, etc make custom grinds. |
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