[cdminter59]

F-BIRD'88 just trying to save you some money in the long run. Once you take it to the track a couple of times you will want more power. With a good heads and the compression you have, intake and 750 cfm, all that would be needed for more power would be a cam change. Besides with your short block with the upgrades and the cam you are looking at you can still drive it on the street. Ain't you ever heard the expression "HOT Street". I have a 454 I've had since 1997. At first I ran a set of oval port factory heads heavily ported. I decided to freshen it up about 5 years later. Eagle 4.00 forged crank, new Eagle I-beam rods, new rings and bearings. I already had a Crower solid roller .641/.636 and 256*/266*. I wanted a set of aluminum heads. I found a deal on the internet on a set of Edelbrock Performer RPM rectangular heads #60559 for $1395.00 (New assembled.). Now when I look back I wish I had bought a set of Brodix, Dart, or AFR's. It's not the intake runner size, it is the exhaust runner size that is small on Edelbrock heads. BTW, my last Christmas present from me to me was a 489 Eagle forged rotating assembly... Runs on pump gas too.

[prostcelica]

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.

[cdminter59]

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.

[vinniekq2]

That would really be a shame if he couldnt use a little solid roller.something thats a step above GM hot cam

[prostcelica]

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.

[cdminter59]

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.

[prostcelica]

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

[PatM]

Just a thought. At 6500 max RPM I'd consider a hydraulic roller and a rev kit. Just saying'.

PatM

[F-BIRD'88]

The xr280r-10 or XR286R-10 will get it done.

[prostcelica]

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??

[vinniekq2]

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

[prostcelica]

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

[vinniekq2]

how many race cares have hydraulic cams?

[prostcelica]

I like the way you think vinnie

[F-BIRD'88]

The solid rollers always make more power.
1. the cam lobe provides more valvelift "area under the curve"
(the valve is open further, for longer)
2. Hyd roller lifters are heavy and tend to go into valve float/bounce at a lower rpm.
The hyd lifter is intolerant of any valvetrain separation. (lifter pump up)
The hyd lifter is intolerant of any oil foaming or momentary loss of oil pressure at the lifter or the agressive spring pressures
suitable to control a agressive cam profile.
(lifter collapse)

You will find these street mechanical rollers hold the lash for a long long time.
You will find that if you cold lash at .004" to .006" tighter than the cam card hot lash spec
that the valvetrain is near noiseless and the running valve lash "hot lash" is correct when the motor is at running temp.
And setting the lash is much less painfull and faster.

use the springs comp recomends and set the installed spring height to spec.

Easy routine maintenance, superior performance and rpm . Often less actual valve train noise than a fast action hyd roller.
Unless you are absolutly allergic to removing the valve covers 1 or manybe 2 times a year,
you will really like one of these cool solid street roller cams.

All the real fast guys that run hyd roller cams and lifters (for street duty) cheat and swap in solid roller lifters when they actually race for money.
They lash at .001 to .006" and only run it like that for limited racing.