Camshafts

Does anyone know what the stock 3.4 and 3.4 X51 Camshaft specs are? Trying to compare these three: stock 3.4 cams ?? x51 3.4 ?? schrick 3.4 280 in. and 272 exh

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X51 is only 3.6

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you my friend are incorrect 996-100-951-01 <-- part number for the 3.4l X51 engine. here is a picture of the 3.4l x51 unicorn as well, although the 3.4 and 3.6 are not really distinguishable from each other this is a 3.4l x51 that EBS had for sale a few years ago

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You are absolutely correct and I learned something new. Just in doing a quick research on the part, it was mainly available in Europe and to only race teams for the US. Have you been even able to determine current availability here? It seems like it may be hard to get even if you wanted one. Some of the difficulties in using it might be getting the right euro tune ecu along with addressing the x51 having only one cam sensor vs the two cam censors found on US cars. For the hp, additional valve train components, tuning, installation,not to mention overall drive ability, would this be even worth it to you? Personally I don't see too many guys going this route. Thanks for pointing out the unicorn though.

I was more so just curious on it's specs to compare to factory and the schrick cams. I'm most likely going the route of getting factory cams weld/grinds

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Gotcha, that thought came to my mind after my last post. Just playing devil's advocate, the x51 cams are designed to work with the specific tune and different heads/intake. Would it be worth all the trouble for custom regrinds, then tuning, and then you're still taking a chance on increased valve train wear and unknown hp? If you prefer to stay the NA route, it might be faster and less riskier to go with something like the FVD kit which has been extensively r&d'd already and basically guarantees their power claims or your money back. I wish more companies stood behind their performance products like this. http://www.fvd.de/us/en/Porsche-0/-/...LBF-FT%29.html

for a NA route I would probably just go with schrick cams which are part of the FVD kit, it would definitely take the guess work out of things. my 3.4l engine is currently being taken out to a 3.8l by utilizing increased bore and stroke. I am using the 3.6 factory crank, and crank carrier and 3.6 pauter rods and a custom set of 99mm piston with to match the valve cuts from the 3.4 heads. Along with this we will be using a gt4094r single turbo so there goes for the NA route.

I have some specs what specifically are you looking for?

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Well that changes things quite a bit. So let me get this straight, 3.8 turbo built motor and you're still thinking of doing cams too?

Wouldn't the valve covers easily show if it's a 3.4 or a 3.6?

If that's a question, well then the answer is yes.. LOL My motor was a 3.4l, then I took it from the a 96mm bore out to 99mm turn used a 3.6 crank and crank carrier. It becomes a 3.8l it's still a m96 block. Imo000- yes the 3.4 and 3.6 heads are different but I don't think there was a question figuring out how to tell them apart unless I missed something

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Drbooba1 I'm looking for duration (at .050") and lift. But If you have separation that can help.

I hope this works for you aince the C/L moves form 120/100 I just set the cams to 100/106 for your comparison the X51 is a 2011 cam and the 996 is a 2010 these cover all models and ranges. reagards C:\Program Files (x86)\AudieTech\CPP\X51int.CPP LIFT DUR. OPEN CLOSE AREA Lobe I1a ----- ------ ----------- ----------- ------ Centerline 100.00 ATDC 0.006 305.12 55.73 BTDC 69.39 ABDC 35.97 .050 Lift C/L 99.44 ATDC 0.020 266.80 35.78 BTDC 51.02 ABDC 35.71 Runout 0.00190 0.040 243.92 22.68 BTDC 41.24 ABDC 35.37 Peak Open Acc. 0.000832 0.050 237.74 19.43 BTDC 38.31 ABDC 35.23 Peak Nose Acc. -0.000308 0.100 214.98 7.75 BTDC 27.23 ABDC 34.33 Peak Close Acc. 0.000905 0.150 195.02 2.29 ATDC 17.30 ABDC 33.04 Lift @ TDC 0.1387 0.200 174.83 12.39 ATDC 7.22 ABDC 31.22 Minimum Flat 0.250 153.74 22.96 ATDC 3.30 BBDC 28.80 Follower Dia. 1.1585 0.300 130.85 34.43 ATDC 14.73 BBDC 25.59 0.350 104.70 47.49 ATDC 27.81 BBDC 21.29 0.400 71.59 64.05 ATDC 44.36 BBDC 15.00 0.44550 --- PEAK CAM LIFT --- 0.44550 --- PEAK VALVE LIFT --- C:\Program Files (x86)\AudieTech\CPP\X51int.CPP LIFT DUR. OPEN CLOSE AREA Lobe E1a ----- ------ ----------- ----------- ------ Centerline 106.00 BTDC 0.006 252.14 52.39 BBDC 19.75 ATDC 32.05 .050 Lift C/L 105.89 BTDC 0.020 239.76 45.99 BBDC 13.77 ATDC 31.97 Runout 0.00020 0.040 227.47 39.69 BBDC 7.78 ATDC 31.79 Peak Open Acc. 0.000896 0.050 222.40 37.09 BBDC 5.31 ATDC 31.67 Peak Nose Acc. -0.000314 0.100 201.14 26.33 BBDC 5.19 BTDC 30.89 Peak Close Acc. 0.001011 0.150 181.76 16.68 BBDC 14.92 BTDC 29.68 Lift @ TDC 0.0739 0.200 162.06 6.91 BBDC 24.84 BTDC 27.95 Minimum Flat 0.250 141.14 3.49 ABDC 35.37 BTDC 25.59 Follower Dia. 1.1943 0.300 117.67 15.14 ABDC 47.19 BTDC 22.36 0.350 89.54 29.16 ABDC 61.30 BTDC 17.78 0.400 48.40 49.71 ABDC 81.89 BTDC 10.01 0.42059 --- PEAK CAM LIFT --- 0.42059 --- PEAK VALVE LIFT --- C:\Program Files (x86)\AudieTech\CPP\stk996int.CPP LIFT DUR. OPEN CLOSE AREA Lobe I1 ----- ------ ----------- ----------- ------ Centerline 100.00 ATDC 0.006 300.87 51.06 BTDC 69.81 ABDC 38.05 .050 Lift C/L 100.02 ATDC 0.020 267.36 33.92 BTDC 53.43 ABDC 37.84 Runout 0.00210 0.040 254.97 27.50 BTDC 47.47 ABDC 37.66 Peak Open Acc. 0.001801 0.050 250.57 25.27 BTDC 45.30 ABDC 37.57 Peak Nose Acc. -0.000866 0.100 230.06 15.05 BTDC 35.01 ABDC 36.80 Peak Close Acc. 0.002106 0.150 209.15 4.77 BTDC 24.39 ABDC 35.49 Lift @ TDC 0.1728 0.200 187.65 5.84 ATDC 13.48 ABDC 33.61 Minimum Flat 0.250 165.50 17.00 ATDC 2.49 ABDC 31.12 Follower Dia. 1.1369 0.300 140.78 29.43 ATDC 9.79 BBDC 27.71 0.350 112.79 43.44 ATDC 23.77 BBDC 23.15 0.400 74.72 62.67 ATDC 42.60 BBDC 15.98 0.44140 --- PEAK CAM LIFT --- 0.44140 --- PEAK VALVE LIFT --- C:\Program Files (x86)\AudieTech\CPP\stk996int.CPP LIFT DUR. OPEN CLOSE AREA Lobe E1 ----- ------ ----------- ----------- ------ Centerline 106.00 BTDC 0.006 342.75 61.74 BBDC 101.01 ATDC 34.39 .050 Lift C/L 105.51 BTDC 0.020 254.50 50.98 BBDC 23.52 ATDC 34.02 Runout 0.00150 0.040 236.61 43.51 BBDC 13.10 ATDC 33.76 Peak Open Acc. 0.000689 0.050 230.33 40.67 BBDC 9.65 ATDC 33.62 Peak Nose Acc. -0.000610 0.100 206.72 29.36 BBDC 2.65 BTDC 32.75 Peak Close Acc. 0.000640 0.150 187.51 19.89 BBDC 12.37 BTDC 31.55 Lift @ TDC 0.0877 0.200 168.35 10.32 BBDC 21.98 BTDC 29.87 Minimum Flat 0.250 147.96 0.03 BBDC 32.08 BTDC 27.57 Follower Dia. 1.2249 0.300 125.21 11.27 ABDC 43.52 BTDC 20.16 0.400 63.73 42.10 ABDC 74.17 BTDC 13.53 0.43700 --- PEAK CAM LIFT --- 0.43700 --- PEAK VALVE LIFT ---

Hell I made it in columns but it didn't make the transfer sorry

drbooba1- thanks for the info. I was looking for the info you provided to compare them to the cams below: Schrick FVD Brombacher - 996 Sport Camshafts (3.4L) Inlet Cams: Cam lift (Valve Lift) I/E (mm) = 10.7 mm Duration�/Peak Timing = 280�/127-102� Valve Timing �CRA (IO-IC-EO-EC) = 13-87 38-62 Valve Lift at TDC I/E (mm) = 0.4-3.2mm Outlet Cams: Cam lift (Valve Lift) I/E (mm) = 10.7 mm Duration�/Peak Timing = 272�/113� Valve Timing �CRA (IO-IC-EO-EC) = 69-23 Valve Lift at TDC I/E (mm) = 1.5mm

It is important to determine what left the figures are taken at, if you can unscramble the info I gave you I start at .006 then .020,.040,.050. So looking at my mess .006 is more duration and .020 is less also I use the radius tappet and Schrick may use a flat so it would be hard to tell with out that information. The X51 cam is the first set of data above and it depends what you are looking for all I can say is if I had to pick a Cam Schrick would be my first choice but all being equal non of these cams is a street strip competition type cam they would be a emissions cam that has a little more duration. regards