What Is Your Idle Speed (and camshaft specs)?

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Not a BB but,I have a 367cuber with a Hughes having about the same specs, and it's about 11" at 700, @930ft elevation. It will idle down to 550 in gear(M/T), with a lot of ignition retard. IDK the vacuum down there,lol.
A 440 would probably pull a lil more vacuum.
 
AJ/FormS said:
Not a BB but,I have a 367cuber with a Hughes having about the same specs, and it's about 11" at 700, @930ft elevation. It will idle down to 550 in gear(M/T), with a lot of ignition retard. IDK the vacuum down there,lol.
A 440 would probably pull a lil more vacuum.
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I’m getting 8-9” @700rpm. Was getting concerned that I may have a vaccum leak but other than the low vacuum I have no other symptoms. Since the EFI is controlling timing I may bump up the base timing and see what that does.
 
Hughes 238/242 hydraulic roller with 1.6 rockers

 
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Cam card

CE074863-001A-4B4C-B6B8-586FFB9637A6.jpeg
 
clinteg said:
.645” lift roller 266/272@.050 106 LSA. Idles around 1100-1200 rpm in neutral. Not very smooth anywhere in the lower rpm range.

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Holy cow that car looks and sounds freaking awesome. That is the prettiest red color iv ever seen. I'm not a fan of red but that thing looks like a hot wheel chrome color. Absolutely amazing.
 
mopardude318 said:
Clint, sounds great. But that fuel pump is loud. Can ya get an in tank pump?
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Yup I’ve hated that pump since day 1. Debating what to do. Not sure if I want to keep the cell I have or get a different one altogether. I’d really like to free up the trunk space and get a whisper quiet pump while I’m at it.
 
About 750-850 with lunati hyd roller 60413
.560/.565 243/251@.050
 
1Fast340 said:
What is the rest of the build?
That thing sounds good.
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Thanks

Blueprint "408" short block (410)
Procomp heads, cleaned up
Procomp air gap knockoff (port matched)
Cometic head gaskets 9.9:1
Aed 750dp
Lunati 60413 hyd roller
Comp Magnum rockers
1 5/8 headers w/ 3" exhaust and Jones fullboar single chamber mufflers
Hughes transmissions 904 w manual vb
Road runner 3800 stall
 
It's interesting to see the lobe separation and installed centerlines between various camshafts.

However, I still don't fully understand how the same cam would react with different LSA or installed centerline. Say if my cam has a 113 LSA and the installed centerline was 108 instead of 110. How does that change things.
 
mopardude318 said:
It's interesting to see the lobe separation and installed centerlines between various camshafts.

However, I still don't fully understand how the same cam would react with different LSA or installed centerline. Say if my cam has a 113 LSA and the installed centerline was 108 instead of 110. How does that change things.
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The higher LSA will provide higher vacuum and smoother idle and will have a broader power curve over a lower LSA cam. The lower LSA will have a choppier idle and typically you can’t run power brakes due to low vacuum. The lower LSA will tend to have a more “peaky” power curve. There are more differences but that’s just what I recall of the top of my head.
 
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