Cam Suggestions

I'm beginning to think the current flat tappet cam, especially if its the
crane made cams for a company named
Golen with that 115835 number
230/230 .480/.480 110
I think it is is indexed incorrectly or maybe factory defective in the way it was ground
as it should have decent power/torque even at 2000-2500 rpm with the manual transmission

the
Lunati cam should noticeably increase power
Voodoo 20120711
https://www.lunatipower.com/voodoo-retro-fit-hydraulic-roller-cam-chevrolet-small-block-270-278.html
Duration @ .050 (Int/Exh): 219/227;
Gross Valve Lift (Int/Exh): .515/.530;
LSA/ICL: 112/106; Valve Lash (Int/Exh)

just as the CROWER CAM SHOULD
https://www.crower.com/searchresults/?part_num=00467&x=10&y=7
either of those two options should,
if properly installed boost your lower rpm and mid rpm power noticeably

my crane 119661 (info linked above in the thread) has no lack of off idle power and it has considerably more duration,
than either of those choices and with a manual transmission you have much more flexibility
 
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I never thought about that, you're probably right Grumpy! Maybe the cam was marked wrong, not real sure at this point, but from description Dorian was giving I was thinking this cam was for race engine and not a street engine. I ran those numbers on DD2000 and I got the same result, it should have had very good torque at 2000. Its hard to tell at this point, but he has it out and is going to put in a good roller cam. So all is well!
 
Indycars said:
If they did something strange with the cam timing, like retarding it 8° - 10°, that would explain
the NO low end torque.
Click to expand...

Grumpy said:
I think it is is indexed incorrectly or maybe factory defective in the way it was ground
as it should have decent power/torque even at 2000-2500 rpm with the manual transmission
Click to expand...

Exactly ...... That's what I was suggesting !
 
yeah, many guys just install using the DOT-TO-DOT reference marks and have never seen or used or even know what a degree wheel is for,
Ive seen cheap timing sets that were 7-9 degrees out of true, and guys that did not understand the timing marks on the timing chain

http://garage.grumpysperformance.co...g-cam-and-shifting-the-lca.10553/#post-100190

http://garage.grumpysperformance.co...ectly-and-get-it-to-last-cam-install-info.90/

http://garage.grumpysperformance.com/index.php?threads/cam-degree-equipment-tools.1759/#post-4440

http://garage.grumpysperformance.com/index.php?threads/timing-chains.2209/#post-6037
 
Well, like you have said many times it’s smart to degree a cam if not anything else then to make sure the cam you have is the correct camshaft. I am thinking this camshaft was labeled incorrectly, I bet if you degree it, that the duration is longer than the said part number says it is, or it was ground way out of phase!
 
I agree with you Rick, I guess it’s just a surprise that it is that far wrong!
 
Thank Indy !!!! Much appreciated. :cool:

A ton of snow here today. Not much that Incan do anyway other than wait.

I am super curious to see what the results of the new roller cam will be. :p
 
indycars
could you over lay the software dyno results you get using the same other parameters
but using the cam I have in my vette so we could compart the three torque & power curves
crane119661.png


and the cam you have in your T-bucket

rower: PN - 00471S
INT/EXH - Dur @ .050” Lift: 236°/240° RR: 1.5/1.5Gross Lift: .555”/.559” LSA: 110° RPM: 2400 to 6000 Redline: 6500
 
Actually, the 0468 looked the best for low end torque! That was what Dorian was most concerned about it seemed.
The 0471 was best for hp it looks like.
I am actually wishing I had gone with the Crower 0468 for my engine, you can't argue with the numbers, and the numbers would be a bit higher for mine with the 1.6 rockers.
 
Here is the new simulation with Dorian's purchased CompCams XR270HR and for comparison
is the Crower 00468. Also included is a 16 page report generated by Dynomation.

CorvetteCam_CompCams_XR270HR-Crower00468.jpg
 

Attachments

  • EngineReportWithCompCamsXR270HR04.pdf
    219.8 KB · Views: 10
:D:D:D:D:D

Thanks Indy !!!!

This looks like it’s going to be fun to drive :cool::cool::cool:

The torque numbers are :eek:

My initial plan was to match or surpass the stock numbers of the L46 corvette which was at 380 TQ and 350 HP. We are well over that :cool:

Thanks again, Rick !!
 
Greetz all...

I decided to take a bullet for the team to try an find out if the instructions that came with the one piece gasket were right: mount dry with no adhesive. Aaaamp that turned out to be a disaster. I’ll need to do that over this weekend. :rolleyes: The oil pan seems to be leaking significantly from all for corners. #doover

67FB369D-BE68-45FC-924F-3D968E5D7F2A.jpeg
 
Now let’s get down to the cam.

I fully installed it and it seems to run good. More testing will be required. I’m getting a rapid vibration of the vacuum needle at idle between 14-19 inches. So I’m thinking I screwed up one or the other valve lash. I do think I’m hearing some ticking. I’ll adjust hot - maybe this weekend.

The nice thing about EFI is that is starts right up :cool:

More later
 
Reading up on my vacuum issue and the rapidly shaking needle between 14-19. I suppose it could be an ignition issue. If the lash was too tight... I can imagine it would cause that too.

Note that with the previous cam it was rock steady at 14 inches.
 
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