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| Enrico | Post subject: The new hughes cams! PostPosted: Sat Nov 30, 2019 1:26 am | |||
Joined: Tue Aug 07, 2018 10:06 pm Posts: 16 Location: Eindhoven Car Model: Plymouth fury 61 | So the new hughes cams are out! Personally I'm quite interested in the mild cruiser cam. http://www.hughesengines.com/Index/index.php Cam specs are over here! | |||
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| Joshie225 | Post subject: Re: The new hughes cams! PostPosted: Sat Nov 30, 2019 10:14 am | |||
Joined: Thu Jan 27, 2005 8:32 pm Posts: 7834 Location: Portland-ish Car Model: Fiat 500e | Well, Huges finally got the message that a slant needs more intake duration than exhaust. That's an improvement. The lobe separation angle is fair for those with a decent (improved) compression ratio and head work with larger valves. Optimum LSA is in the 106-107° range for a 225 with a stock head and low compression. The lift given is very high and is useless for a stock cylinder head. The valve spring retainer will hit the guide with more than about .460" lift so the top of the guide will need to be trimmed before using any of these cams. That much lift, and the acceleration needed to achieve that lift, will require a strong spring and will be hard on the valve train. I would not buy one unless I had a cylinder head that flowed particularly well at high lifts. _________________ | |||
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| Greg Ondayko | Post subject: Re: The new hughes cams! PostPosted: Sat Nov 30, 2019 10:27 am | |||
Joined: Sat Nov 27, 2004 8:03 pm Posts: 9070 Location: IRWIN PA Car Model: | I also wonder how they will behave with stock type oil pump gear drive architecture? Greg | |||
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| Killer6 | Post subject: Re: The new hughes cams! PostPosted: Sat Nov 30, 2019 1:43 pm | ||
Joined: Sat Mar 19, 2016 7:25 pm Posts: 365 Location: SW PA Car Model: | Joshie225 wrote: Well, Huges finally got the message that a slant needs more intake duration than exhaust. That's an improvement. The lobe separation angle is fair for those with a decent (improved) compression ratio and head work with larger valves. Optimum LSA is in the 106-107° range for a 225 with a stock head and low compression. The lift given is very high and is useless for a stock cylinder head. The valve spring retainer will hit the guide with more than about .460" lift so the top of the guide will need to be trimmed before using any of these cams. That much lift, and the acceleration needed to achieve that lift, will require a strong spring and will be hard on the valve train. I would not buy one unless I had a cylinder head that flowed particularly well at high lifts. Hmmmmm, so Hughes should've built big aggressive cams for guys with stock valves & heads, ...............My DC Purple shaft 276/.490 checks at ~218deg @ .050,...not thinking the OA lift vs fifty is that out of line............................... | ||
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| Joshie225 | Post subject: Re: The new hughes cams! PostPosted: Sat Nov 30, 2019 1:57 pm | |||
Joined: Thu Jan 27, 2005 8:32 pm Posts: 7834 Location: Portland-ish Car Model: Fiat 500e | Killer6 wrote: Hmmmmm, so Hughes should've built big aggressive cams for guys with stock valves & heads, ...............My DC Purple shaft 276/.490 checks at ~218deg @ .050,...not thinking the OA lift vs fifty is that out of line............................... People contemplating using these cams should know what is needed to use them effectively. The Mopar Performance 276° cam has a 106° LSA and behaves as though it has much more than 218° duration at .050" lift. I used the MP 276 cam once and exchanged it for a Comp Cam rated at 220° at .050" lift and the stark difference in idle and low-speed manners cannot be attributed solely to the 4° greater LSA. _________________ | |||
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| DusterIdiot | Post subject: Re: The new hughes cams! PostPosted: Sat Nov 30, 2019 2:28 pm | |||
Joined: Tue Oct 29, 2002 8:27 pm Posts: 9760 Location: Salem, OR Car Model: | Josh hit it on the head pretty well. I am not sure who engineered these but they aren't the best configuration for our builds... that tight lash The mild cruiser cam would work OK for a turbo, but would not use it for NA or even hyperpak use...you would have great idle and vacuum, The whiplash cam is like the Comp Cam Xtreme cam I had ground for better street use as the .435-.440 lift street grinds seemed to want more lift Nice to see OS valves available again. 2 cents... | |||
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| Rick Covalt | Post subject: Re: The new hughes cams! PostPosted: Sat Nov 30, 2019 2:30 pm | ||
Joined: Wed Oct 23, 2002 7:57 pm Posts: 8345 Location: Waynesboro, Pa. Car Model: 65 Valiant 2Dr Post | We have access to lots of cams! I am glad they have a drop in valve available again? Maybe we should check with them for sure?? _________________ | ||
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| drgonzo | Post subject: Re: The new hughes cams! PostPosted: Sat Nov 30, 2019 5:08 pm | |||
Joined: Mon Aug 02, 2010 7:36 am Posts: 1200 Location: Rome, GA Car Model: 1963 Dart 270, 1980 D150 | I am glad Hughes is supporting the slant six, whether they have ground the best cams or not. I look forward to seeing their race grinds. _________________ | |||
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| Enrico | Post subject: Re: The new hughes cams! PostPosted: Sun Dec 01, 2019 5:59 am | |||
Joined: Tue Aug 07, 2018 10:06 pm Posts: 16 Location: Eindhoven Car Model: Plymouth fury 61 | drgonzo wrote: I am glad Hughes is supporting the slant six, whether they have ground the best cams or not. I look forward to seeing their race grinds. Exactly.. Wondering that Aswell.. | |||
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| DadTruck | Post subject: Re: The new hughes cams! PostPosted: Sun Dec 01, 2019 7:26 am | ||
Joined: Wed Sep 17, 2008 6:48 pm Posts: 3807 Location: Indianapolis Car Model: | Quote: lift higher as 450 you have to cut the top side of the valve guide to not have valve spring coil bind issues,, not a big deal. The valves are pricy, but have nice features, reduced stem diameter at the valve head end, stellite tips. The lash on the cams looks suspect, unless someone beats me to it I will give Hughes a call Monday to get information _________________ | ||
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| DadTruck | Post subject: Re: The new hughes cams! PostPosted: Mon Dec 02, 2019 9:53 am | ||
Joined: Wed Sep 17, 2008 6:48 pm Posts: 3807 Location: Indianapolis Car Model: | Called Hughes and spoke with Dave. Dave said the .004 and .006 lash numbers are correct and the ramps are designed to allow for that tight of a lash. To get that you need a steep ramp. Remember the slant has the large .904 lifter diameter, larger diameter than a Chevy or Ford so If I needed a cam I would be willing to give one run. Nice to see a manufacturer supporting the performance side of the slant six. _________________ | ||
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| Greg Ondayko | Post subject: Re: The new hughes cams! PostPosted: Mon Dec 02, 2019 9:58 am | |||
Joined: Sat Nov 27, 2004 8:03 pm Posts: 9070 Location: IRWIN PA Car Model: | DadTruck wrote: Called Hughes and spoke with Dave. Dave said the .004 and .006 lash numbers are correct and the ramps are designed to allow for that tight of a lash. To get that you need a steep ramp. Remember the slant has the large .904 lifter diameter, larger diameter than a Chevy or Ford so If I needed a cam I would be willing to give one run. Nice to see a manufacturer supporting the performance side of the slant six. Cool thanks John, Any conversation / worries about the Pump/ dist drive gear? Greg | |||
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| DadTruck | Post subject: Re: The new hughes cams! PostPosted: Mon Dec 02, 2019 10:10 am | ||
Joined: Wed Sep 17, 2008 6:48 pm Posts: 3807 Location: Indianapolis Car Model: | Quote: worries about the Pump/ dist drive gear I did not have that conversation with anyone at Hughes, however wasn't that issue regardless I would take the time to; if it looks right, it probably is. _________________ | ||
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| Killer6 | Post subject: Re: The new hughes cams! PostPosted: Mon Dec 02, 2019 12:37 pm | ||
Joined: Sat Mar 19, 2016 7:25 pm Posts: 365 Location: SW PA Car Model: | Enrico wrote: drgonzo wrote: I am glad Hughes is supporting the slant six, whether they have ground the best cams or not. I look forward to seeing their race grinds. Exactly.. Wondering that Aswell.. The guides need machined down to prevent the retainers from smashing the valve seals &/or bending the pushrods, preventing coil-bind only requires the correct valve springs & installed height. Which is the same for almost every OE engine built, ever, smallblocks/bigblocks,Chebby/Moper/Furd........it's not news and certainly not unique to a Slanty...........seems some are looking for a reason to dislike these cams before anyone has given them a crank. | ||
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