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  #31 (permalink)  
Old 08-09-2012, 12:10 AM
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ALL the trick hyd lifters High bleed, Rhoads, racing hyd etc make much much more valvetrain noise at idle than
these mechanical street rollers ever will.

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  #32 (permalink)  
Old 08-09-2012, 07:31 AM
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thamk's f-bird'88 thats very well written and easy to understand.Wish I could explain things that clearly
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Old 08-09-2012, 12:11 PM
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Thank you very much F bird that is great info. Solid roller it is. In your opinion do I need to be concerned about PTV clearance with the comp XE274 solid roller?? Id post the link for the cam but I'm on my phone. Sorry bout that. I will chech clearances regardless but I thought I remember you saying in a previous post you didn't think I'd have an issue. Cam specs are INT - 236@.50 .55 lift and EX - 247@50 .57 lift. I am going of memory on the specs but should be close. I'd also like to run 1.6 rockers.......what do you think??
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Old 08-09-2012, 12:18 PM
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why do you want 1.6 rockers?
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Old 08-09-2012, 12:51 PM
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More lift. Why?? Bad idea??
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Old 08-09-2012, 01:03 PM
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buy a bigger cam?
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Old 08-09-2012, 02:52 PM
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Correct me if I'm wrong but if I buy a bigger cam that means more duration. I'm only 10.3:1. The XE274 is 236 @ .5. Which is right about where I want to be for my compression ratio isnt it??. By going to a 1.6 rockere you get a little more lift at the sane duration.
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Old 08-09-2012, 03:03 PM
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first,changing rockers will change the lift and also it will change the duration slightly. How are you choosing your cam? what are the flow numbers for your cylinder heads?What rpm range are you thinking?
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Old 08-09-2012, 06:16 PM
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This is the cam comp recomended COMP Cams: Xtreme Energy™, XR274R <BR> Great for Power Touring, Very Reliable Power, Rough Idle

These are the flow numbers for the heads out of the box but Im going to port them (after reading vizards book and researching the heck out of it) Edelbrock.com - Cylinder Heads - Chevy - Small Block - E-Street

As far as RPM range I dont plan spinnig it over 6000-6500
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Old 08-09-2012, 06:45 PM
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Quote:
Originally Posted by vinniekq2 View Post
first,changing rockers will change the lift and also it will change the duration slightly. How are you choosing your cam? what are the flow numbers for your cylinder heads?What rpm range are you thinking?
That duration is about right. Rocker ratio doesn't affect duration. It does increase lift.
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Old 08-09-2012, 07:28 PM
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Phone comp cams back again and this time tell them only that you want to go fast.
Don;t tell them you only go to the track once a years, or 99% street to what ever you told them.
Don't ask about VTP clearance etc.

Do not dummy down the conversation with your unfounded fears and
BS or you will get the wrong cam.
(they are there to sell cams. you can by the cam you want or buy the cam that the motor/car wants.
They will sell you what ever you tell them to.

Buy the cam that will make you go fast not the one that fits your idea
or limiting parameters.


Tell them what you got and tell them you want to go fast.
"Sell me the most powerfull street roller cam you got".

You will get a whole different answer.
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  #42 (permalink)  
Old 08-09-2012, 07:29 PM
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Cam Selection

You said this is a street car so I agree with you. Go with the XR274R solid roller. If you want to go up a step you could go with the XR280R. It requires 10.1 compression, 3000 torque converter, and 3.90 gears. Check out these kits. COMP Cams: Magnum, 280AR: Cam & Kit and this : COMP Cams: Xtreme Energy™, XR274R: Cam & Kit. One more thing, when selecting a camshaft you can go up or down a 1/2 point on compression ratio without causing any problems.
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  #43 (permalink)  
Old 08-09-2012, 07:34 PM
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The cam you are looking at is a cruiser/poser cam/ "power tour"
You are leaving a lot on the table. Forget the 1.6 rockers.
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Old 08-09-2012, 08:08 PM
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F Bird can you please define a poser camlol.
What can would you recomend??
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