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Old 08-05-2012, 09:08 AM
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Hey cdminter59. THis ia going to be a 99% street car. If Im being honest with myself I will probably go to the track once a year. I wish I could afford a set of AFR's or Dart's but it just wasnt realistic at this point as I want to got to a roller as well. As far as the E-street head go they have a 60cc exhaust runner vs a 64cc on the AFR 180. After they are cleaned up Im sure they will be close to the afr in size. I know you think a 180 head is to small but for my application Ive spoke to lots of people that said that is the perfect size for a street car withh my motor.

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Old 08-05-2012, 09:55 AM
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cam selection

Prostcelica, I went to Edelbrock website and read the info on the E street heads. Flow rate isn't much different than the performer rpm head. The listed valve spring diameter is 1.25" and the performer rpm valve spring diameter is 1.46. Max lift is .550, max lift on performer rpm is .575. Under technical notes it says use with hydraulic flat tappet camshafts .550" lift. Not compatible with hydraulic roller camshafts.
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Old 08-05-2012, 10:06 AM
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That would really be a shame if he couldnt use a little solid roller.something thats a step above GM hot cam
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Old 08-05-2012, 10:36 AM
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Hey Guys. Thats what turned me off off the E-street heads originally.(1.25 valve spring diamiter) I called Edelbrock on Friday to inquire and the tech told me That as of April this year they are know putting 1.46 od springs in the E-street heads. They just havn't updated there web site yet. When I ordered the heads I had the guy measure the OD of the valve spring just in case. They are deffinatly 1.46. The Edelrock tech also said they are the same casting as the performer Rpm with different valve train and no cnc port work. So I think with some port work and a valve sping change could be a good set of heads.
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Old 08-08-2012, 12:53 PM
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cam selection

Back to the subject of valve springs. Call cam manufacturer of the cam that you want to use. Get the info on the lifters, valve springs,retainers, and locks. Just curious, post the diameter of the valve springs that are recommended. Idk but on my big block with a mechanical roller the diameter of the valve springs are 1.550.
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Old 08-08-2012, 09:44 PM
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I emailed comp cams all of my info. This is what they came back with.

CAM: COMP Cams: Xtreme Energy™, XR274R <BR> Great for Power Touring, Very Reliable Power, Rough Idle

Lifters: COMP Cams: Endure-X™ Solid Roller Lifters: Chevrolet V8 265-400

Valve spring: http://www.compperformancegroupstore...ory_Code=SMRXE

Last edited by prostcelica; 08-08-2012 at 09:57 PM.
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Old 08-08-2012, 10:06 PM
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Just a thought. At 6500 max RPM I'd consider a hydraulic roller and a rev kit. Just saying'.

PatM
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Old 08-08-2012, 10:53 PM
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Hey guys. I haven't fully decided on a solid. What are the pros and cons of a solid roller and a hydraulic roller with my setup??
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Old 08-08-2012, 11:16 PM
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hydraulic doesnt need to be adjusted regularly. solid roller has lighter components so can rev higher. 6500 rpm seems to be where a rev kit is needed for roller hydraulic cams,not always
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Old 08-08-2012, 11:48 PM
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Which cam will make more HP/tourqe with my setup?? not worried about having to adjust the lash once and a while if I go solid
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Old 08-08-2012, 11:52 PM
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how many race cares have hydraulic cams?
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Old 08-09-2012, 12:20 AM
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I like the way you think vinnie
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Old 08-09-2012, 08:31 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, 01:11 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, 01:18 PM
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why do you want 1.6 rockers?
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