Crane 168771 cam
01-28-2019, 07:30 PM
#2
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I am running the 139651 on a 10:1 single dominator 598.
Does not make a lot of vacuum at low RPM so the in and out of gear with the 18 x33 props are no Bueno
Does not make a lot of vacuum at low RPM so the in and out of gear with the 18 x33 props are no Bueno
01-28-2019, 09:30 PM
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I wouldn’t think the 651 wouldn’t be that big in a 600” motor?? Maybe you need to play with timing tuning more??
Last edited by Daytona25; 01-28-2019 at 09:38 PM.
01-28-2019, 09:34 PM
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Top of my head,maybe Sutphen30 ? Actually,I think he has run a few of these with firing order swaps. Give'm a PM.
01-28-2019, 09:42 PM
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My setup- 509” dart aluminum heads that are going to get ported, 8.2-1 compression 871 billet blower shop blower with intercooler setup for 8lbs boost with 2 dominator carbs Imco powerflow manifolds with dry to the tip tails and looking to ad the 771 cam just looking to see if anyone has a video of it running in an engine!?!? Going in a 25’ Eliminator Daytona currently has the 509 and dart heads but with a b&m 250 blower intercooler setup at 5lbs boost and unknown crane cam!
Last edited by Daytona25; 01-29-2019 at 08:31 AM.
01-29-2019, 07:15 AM
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rand: Crane CamsManufacturer's Part Number: 168771 Part Type: CamshaftsProduct Line: Crane Hydraulic Roller CamshaftsSummit Racing Part Number: CRN-168771
UPC: 021174045079 Cam Style: Hydraulic roller tappet Basic Operating RPM Range: 2,600-6,200 Intake Duration at 050 inch Lift: 240 Exhaust Duration at 050 inch Lift: 248 Duration at 050 inch Lift: 240 int./248 exh. Advertised Intake Duration: 302 Advertised Exhaust Duration: 310 Advertised Duration: 302 int./310 exh. Intake Valve Lift with Factory Rocker Arm Ratio: 0.621 in. Exhaust Valve Lift with Factory Rocker Arm Ratio: 0.632 in. Valve Lift with Factory Rocker Arm Ratio: 0.621 int./0.632 exh. Lobe Separation (degrees): 114 Computer-Controlled Compatible: No Grind Number: HR-240/365-2S-14 IG Valve Springs Required: Yes Quantity: Sold individually. Notes: Camshaft incorporates an integral cast iron distributor drive gear. An aluminum-bronze distributor drive gear not required. 10.5 to 12.5 compression ratio advised. Also fits 502 c.i.d. engines.
UPC: 021174045079 Cam Style: Hydraulic roller tappet Basic Operating RPM Range: 2,600-6,200 Intake Duration at 050 inch Lift: 240 Exhaust Duration at 050 inch Lift: 248 Duration at 050 inch Lift: 240 int./248 exh. Advertised Intake Duration: 302 Advertised Exhaust Duration: 310 Advertised Duration: 302 int./310 exh. Intake Valve Lift with Factory Rocker Arm Ratio: 0.621 in. Exhaust Valve Lift with Factory Rocker Arm Ratio: 0.632 in. Valve Lift with Factory Rocker Arm Ratio: 0.621 int./0.632 exh. Lobe Separation (degrees): 114 Computer-Controlled Compatible: No Grind Number: HR-240/365-2S-14 IG Valve Springs Required: Yes Quantity: Sold individually. Notes: Camshaft incorporates an integral cast iron distributor drive gear. An aluminum-bronze distributor drive gear not required. 10.5 to 12.5 compression ratio advised. Also fits 502 c.i.d. engines.
01-29-2019, 08:14 AM
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Just curious what a video is supposed to prove ? Some of the best running engines have cams that do not "sound" all that great. Performance numbers are a lot more important than sound.
The Crane catalog says:
Good mid range and upper rpm horsepower. Rough idle, performance usage. Bracket racing, manifold nitrous system, auto trans with 3500+ converter. Marine performance for 540+ engines, 3800 to 4200 cruise rpm. 10.5 to 12.5 compression ratio advised. Good with supercharger 18lbs maximum boost with 8 to 1 maximum compression ratio advised.
The Crane catalog says:
Good mid range and upper rpm horsepower. Rough idle, performance usage. Bracket racing, manifold nitrous system, auto trans with 3500+ converter. Marine performance for 540+ engines, 3800 to 4200 cruise rpm. 10.5 to 12.5 compression ratio advised. Good with supercharger 18lbs maximum boost with 8 to 1 maximum compression ratio advised.
01-29-2019, 08:29 AM
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I 100% agree and will not pick a cam based on sound over performance, this cam I think will meet my expectations on performance but am asking for advice to reinsure that I made the right choice!! All the video would do is give me an idea of what it would sound like at idle, not looking for a drag car inspired idle but hoping it will at least have a noticeable high performance sounding idle to it....the current cam sounds very good but performance is left to be desired and although I do not know exactly what grind it is I hope to see a part number when I pull the timing cover to reference what was in it vs what it’s being replaced with. I have been down the custom spec cam road and although some good numbers can be had with that setup I’ve learned that the tried and true setups tend to be easier and less problematic most of the time! Offshore stuff is new to me as I’ve only build drag car motors and jet boat motors so I’m just asking for the more knowledgeable advice from you guys that have been around the offshore stuff for awhile. So the motor I mentioned above and the 771 crane cam!?
Last edited by Daytona25; 01-29-2019 at 08:33 AM.
