[Dmarr]

I am considering changing cams I currently have a Comp Cam Factory Muscle 520 242 with a 108 center I am not happy with the idle and low vacuum also it is a solid lifters I am looking for some suggestions it is an automatic 4:10 gear all the rest is factory Mark IV COPO as the 427 was from factory. I am looking at Hydraulic Roller Thank You

 

[buenymayor]

Look no farther than here: https://straubtechnologies.com/ Chris is also a member, here.

 

[Lew540]

On hydraulic roller the duration is actually 5 to 7 degrees (because no lash) or so bigger than a solid as this will come into play when comparing it to your current cam as it relates to idle and vacuum stuff.

 

[68Chevele]

I am considering changing cams I currently have a Comp Cam Factory Muscle 520 242 with a 108 center I am not happy with the idle and low vacuum also it is a solid lifters I am looking for some suggestions it is an automatic 4:10 gear all the rest is factory Mark IV COPO as the 427 was from factory. I am looking at Hydraulic Roller Thank You

Get the same cam on a 114° LCA it will idle better and have more vacuum. The 1302 and 1303 Summit cams work very well also and have good street manners.

 

[1968 hot rod]

Factory replacement "142" will have plenty of vacuum and a good idle if you switch to that.

 

[jjjaffo]

My vote would also be for Chris Straub. He can brew up a nice hydraulic roller for ya with better street manners and great power.

 

[427L88]

I dont know how you drive your 427, yet with 4.10s I;d be letting her see 7000 frequently. THEREFORE I would get with Chris if only for the proper valvetrain setup to RPM well.

EG on the flip side, Comp's cast core rollers require wimpy ass springs and cant much pull past 55-5800 well. That's cutting the guts out of 427 IMHO. Beehives, Ti retainers, and LET HER BREATHE!

I would NOT use the "stock" Clay Smith BBC HR cam with 227/240. Wont pull past 6000.

Used one of Harold's Brookshire's short track cams, still available from Bullet. 276/284, 243/252, 152/160, 5,95/.605 lift on a 110 LSA. held 11-12" Hg at idle and made GREAT power with HP peak at 6850 or so in 433".

Harold had me well advance that cam, it it really helped the rect port heads ( 074 alloys) pick u[p velocity. She still RPM'd well with 7 degrees of advance in the cam. Says it is still a BIG cam for that 427!

 

[Leadhead]

Mike Jones Designs is also a great source. He's also a member here (@CamKing).

 

[Dmarr]

I want to Thank Everyone as usual Great Help!

 

[COPO9560]

Let us know what you choose and how it performs. Good luck

 

[Dmarr]

Let us know what you choose and how it performs. Good luck

I will

 

[cstraub]

I'm back from a trade show....If I can be of help let me know.

 

[Dmarr]

Chris I would like your help I am looking for a more streetable cam Hydraulic Roller I have a 1969 camaro copo 427
11 to1 410 gear stock hi perf heads factory manifold and Holly factory exhaust manifold Auto trans stock converter I am running a Comp Cam Factory Muscle 242/242 Solid Flat Cam 108 center The problem very low vacuum I had to add a vacuum pump to work the breaks and a ruff idle in drive any suggestions I need cam lifters and springs also. Thank You

 

[cstraub]

Chris I would like your help I am looking for a more streetable cam Hydraulic Roller I have a 1969 camaro copo 427
11 to1 410 gear stock hi perf heads factory manifold and Holly factory exhaust manifold Auto trans stock converter I am running a Comp Cam Factory Muscle 242/242 Solid Flat Cam 108 center The problem very low vacuum I had to add a vacuum pump to work the breaks and a ruff idle in drive any suggestions I need cam lifters and springs also. Thank You

give me a ring at 423 391 7774