|10-07-2012 12:05 PM|
|10-07-2012 12:04 PM|
The springs that are used for a STREET mechanical rolller are not the same as whats used on a race roller.
Your street rolller will not have .710" lift.
It will be .630" or less. (1.5 rocker) Keep the heads and get and add the right springs to suite the roller cam.
Get a complete street roller cam and kit and install it.
EG: Comp #K12-771-8
Mechanical street rollers use more spring pressure than a hyd roller but a bit less pressure than typical
competition race roller cam.
Typically 160 to 250 seat 400 to 550 open on street rollers.
Follow the cam makers recomendation for that specific cam.
The street roller cams made on the cast cam core tend to go easier on the spring pressure. (low cost)
The street roller cams made on the billet steel cam core can use more pressure. (higher cost stronger core)
Why pay someone to screw it up when you can do it yourself, correctly in a short time.
It is not hard and needs to be done correctly. Most, even so called pro mechanics don't do it right.
But you can.
Note* Doing the job correctly does not equal Hard to do.
|10-07-2012 11:50 AM|
|vinniekq2||afr are very good heads,build the engine,tune it on a dyno,go shred tires.30 hp one way or another wont make that much difference.|
|10-07-2012 11:36 AM|
bougt, also ill have to take the afr 210cc heads back to summitracing, I got them custom order for 650 hyd roller on the 210 heads instead of the 710 solid springs that cam with them... idk knowing me ill just keep hyd roller and just call it day
|10-07-2012 11:26 AM|
|vinniekq2||buy the $400 dollar solid lifters,get a better camshaft like the article posted mentioned,use the $300 you saved and pay someone to adjust your valves.or,pay more for less?|
|10-07-2012 11:20 AM|
|10-07-2012 09:47 AM|
But when I was researching this same thing a year ago, I had taken a hard look at the Lunati retro hydraulic roller lifters. They're designed to be compatible w/higher than normal spring pressure that's usually needed for elevated rpm use, so you might want to start there. Using the lightest possible valve train components will also help in general.
|10-07-2012 08:42 AM|
|10-06-2012 04:22 PM|
Why does adjusting the valve lash have to be a Headache. It is not.
You are misinformed. Getting Hyd roller lifters to perform at high rpm is a headache.
All of the supposed advantages of a hyd roller lifter, Low maintance, long life, will be eliminated
once the spring pressure is jacked up enough and the internal plunger travel is limited, to allow a Hyd roller to rpm at this level. It will require just as much or more maintenance . any real or perceived low mantance durability advantage you think you will get will be gone. virtually eliminated ..
Such a hyd roller cam that will allow a hyd roller to actually perform at high rpm is costly.
A lot of it is in the cam lobe design. The typical off the shelf hyd roller cams are not what you want.
The solid roller cam and lifter set up will make more power and last longer when used at high rpm where actual big power and rpm is desired.
You will not save money or time, work and will make less power than a solid roller.
The valve lash on a correctly designed solid roller valve train stays set for a long time and is easy and quick to adjust. You will or should be changing the oil and filter more often than you will have the valve covers off.
The periodic valve lash adjustment is easily done cold and takes about 25 to 40 minutes to do all 16 valve on a V8.
Most times only a few of the 16 valves need actual lash adjustment.
Setting the valve lash "Hot" is not nessessary. Just set it cold .002 to .006" tighter than the recomended hot lash spec.
Once a summer is plenty. My bud here ran with no adjustment for over 2 years on his solid mechanical street roller 396 BBC.
The lash was only out a few thou. Minor lash touch up as all that was required.
He found it quite easy to do him self and not a headache at all or anything to be intinidated by.
(after graduating from the F-Bird'88 school of easy/no hassle valvetrain adjustment.)
The street solid roller valve train runs quiet. You have to really listen to tell the difference between it and hyd lifters.
Some hyd cams lifters are very noisey. The solids are actually quieter at idle.
All I had to do was drink the beverages. LOL Good to go for another year or so.
|10-05-2012 09:07 AM|
|10-04-2012 06:28 PM|
Some good Info/Ideas here, may help you.
Solid Roller Power From Hydraulic Lifters:
Roller Lifter Install - Solid Roller Power From Hydraulic Lifters - Car Craft Magazine
Three-Way Cam Lobe Shootout:
|10-03-2012 11:37 PM|
|10-03-2012 11:09 PM|
|vinniekq2||why dont you use solid rollers if you want to rev that high? use shafts also?|
|10-03-2012 10:57 PM|
A Good set of HYD Roller Lifters that can rev to 7000rpm
I looking for a Great set of Retrofit HYD Roller Lifters that can rev close to or to 7000rpm.
I'm using the AFR1103 heads 210cc competition heads I swapped the 710 solid roller springs for the AFR#8019 hyd roller 650 lift springs.
I really appreciate the advice if u guys have any suggestion on what Retrofit HYD Roller Lifters I should go with thanks. Des