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FE Technical Forum / Re: Those "new" summit fe HYD roller cams.
« on: April 30, 2026, 07:10:12 PM »
Not exactly, but i said someone needs to get with him and straighten it out... 
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FE Technical Forum / Re: Those "new" summit fe HYD roller cams.
« on: April 30, 2026, 02:37:04 PM »
I emailed Summit nearly a week ago asking for an explanation of the anomalies including My Gassers cam card not matching the one for the same cam on SummitRacing.com.
So far no reply other than the automated "we got your question" e-mail.
So far no reply other than the automated "we got your question" e-mail.
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FE Technical Forum / Re: hydraulic roller cam in a 390
« on: April 24, 2026, 07:27:08 AM »scroll down here to see the cam and card. https://forum.nsra.org.uk/showthread.php?81897-plan-B-ish-58-nash-rambler-project/page28
...
that cam card doesn't match the one on summit racing dot com. IVC 71 to IVC 77 and 10 degrees more Advertised is a pretty big difference. Also your cam card indicates 1.75 vs 1.76 rocker ratio.
The discrepancies in the specs on these cams are wild.
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FE Technical Forum / Re: speedmaster aluminum heads and roller rockers
« on: April 23, 2026, 01:32:25 PM »
Agree with Ross, unfortunately nearly impossible to avoid China altogether but i defiantly wont knowingly purchase something they ripped off from someone else.
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FE Technical Forum / Re: hydraulic roller cam in a 390
« on: April 23, 2026, 01:27:41 PM »
Cool,
I was curious if you were going to get a fancy report form their supposed super duper quality checking thing ma bob they talk about in some of the "articles" about other PRO Series cams.
I was curious if you were going to get a fancy report form their supposed super duper quality checking thing ma bob they talk about in some of the "articles" about other PRO Series cams.
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FE Technical Forum / Re: hydraulic roller cam in a 390
« on: April 23, 2026, 06:12:47 AM »
So which cam did you get?
How does it and the packaging look?
Did it have anything other than the cam card shown on summit racing dot com with it?
What springs/retainers do you plan to use?
How does it and the packaging look?
Did it have anything other than the cam card shown on summit racing dot com with it?
What springs/retainers do you plan to use?
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FE Technical Forum / Re: speedmaster aluminum heads and roller rockers
« on: April 20, 2026, 08:03:02 AM »
Jay is good people.
Also glad summit stepped up, don't support companies who copy other peoples products....
Also glad summit stepped up, don't support companies who copy other peoples products....
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FE Technical Forum / Re: Those "new" summit fe HYD roller cams.
« on: April 17, 2026, 12:55:02 PM »
Agree with points about quick events and overlap/LSA.
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FE Technical Forum / Re: Those "new" summit fe HYD roller cams.
« on: April 13, 2026, 06:22:10 PM »
Completely agree with you Brent, i just find new stuff for the FE interesting, particularly not so racy stuff.
Most of these seem to be aimed at stockish engines because they talk about things like "stock heads", "stock pistons", which makes sense for Summit. I do feel like got some things right for the "typical fe" like the increased split in durations which is probably the right direction for most OE heads.
The other thing is the math doesn't math on the cam cards, as mentioned this could just be a mistake, but every one I've tried to run the numbers on has not come up matching the cam card. That brings questions of course, and is IME very atypical.
Most of these seem to be aimed at stockish engines because they talk about things like "stock heads", "stock pistons", which makes sense for Summit. I do feel like got some things right for the "typical fe" like the increased split in durations which is probably the right direction for most OE heads.
The other thing is the math doesn't math on the cam cards, as mentioned this could just be a mistake, but every one I've tried to run the numbers on has not come up matching the cam card. That brings questions of course, and is IME very atypical.
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FE Technical Forum / Re: Those "new" summit fe HYD roller cams.
« on: April 13, 2026, 06:49:04 AM »
So it seems Brian Nutter is the guy designing the lobes.(cant find a ton about him)
At least where they are talking about LS cams they claim the billets are US made and that the Landis produces a very good and accurate finished lobe. (who else is using those? Comp?, Howards?) Again talking about "PRO LS" cams its sounds like they are even machining the billets and doing the hardening.
Anyway... somewhat intriguing if true.
At least where they are talking about LS cams they claim the billets are US made and that the Landis produces a very good and accurate finished lobe. (who else is using those? Comp?, Howards?) Again talking about "PRO LS" cams its sounds like they are even machining the billets and doing the hardening.
Anyway... somewhat intriguing if true.
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FE Technical Forum / Those "new" summit fe HYD roller cams.
« on: April 12, 2026, 03:11:34 PM »
Am i missing something here?
For instance the HR 3 / Summit 8917
In order to get the numbers it has to be 279 advertised on the intake and a 108.5 ICL (cam card 278/107)
While realize that its very possible to have multiple lobes of the same lift with different durations, that seems pretty weird for all the lobes in the line to be the same lift and of 7 different durations. I don't really recall having seen that in other cam lines....
Any thoughts on this?
- The numbers don't jive on the Wallace calculator?
- All the lobes from 212@.050 to 248@.050 are .587 lift?
For instance the HR 3 / Summit 8917
In order to get the numbers it has to be 279 advertised on the intake and a 108.5 ICL (cam card 278/107)
While realize that its very possible to have multiple lobes of the same lift with different durations, that seems pretty weird for all the lobes in the line to be the same lift and of 7 different durations. I don't really recall having seen that in other cam lines....
Any thoughts on this?
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FE Technical Forum / Re: hydraulic roller cam in a 390
« on: April 05, 2026, 07:05:41 PM »
Shame about the overlap on 8919, little wider LSA would get the vacuum up and the rumpty rump down which would be good IMO.
Also, the cam card numbers don't jive the valve events spit out by wallace on several of them.
Also, the cam card numbers don't jive the valve events spit out by wallace on several of them.
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FE Technical Forum / Re: hydraulic roller cam in a 390
« on: March 30, 2026, 07:45:49 PM »
Interesting
Several of those have a wider duration split by a few degrees than the average shelf cam.
Seem to hover in the 53-55 degree difference in ADV/.050. That seems like it might be an issue with fairly stock (heavy) valve train, seems like they are pushing beehives (lighter)...
Descriptions of behavior seem typically vague and off.
Assuming the the quality is there might not be a terrible choice on the cheap.
Love to hear how it works if anyone try one.
Several of those have a wider duration split by a few degrees than the average shelf cam.
Seem to hover in the 53-55 degree difference in ADV/.050. That seems like it might be an issue with fairly stock (heavy) valve train, seems like they are pushing beehives (lighter)...
Descriptions of behavior seem typically vague and off.
Assuming the the quality is there might not be a terrible choice on the cheap.
Love to hear how it works if anyone try one.
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FE Technical Forum / Re: Weird find, possible 390PI?
« on: February 17, 2026, 11:33:37 AM »
OK, i'm sort of confused.
Are you saying you it has 332/352/360 long rods and think it's a factory 390? And you found where this was a thing?
Ive heard of people other than ford doing this, but not from the factory.... ?
How many bosses does the block have at the engine mount on each side?
Also by PI do you mean Police Interceptor or Performance Improved?
Are you saying you it has 332/352/360 long rods and think it's a factory 390? And you found where this was a thing?
Ive heard of people other than ford doing this, but not from the factory.... ?
How many bosses does the block have at the engine mount on each side?
Also by PI do you mean Police Interceptor or Performance Improved?
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FE Technical Forum / Re: New Guy New to the FE
« on: December 16, 2025, 07:03:43 AM »
When you say top end - tope end of the engine hardware or top end power?