mechanical roller? or just stick to hydraulic?

I

importhater5.0

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May 15, 2003

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West Chester, Pa

Oct 25, 2007

#1

• Oct 25, 2007

• #1

Lemme ask one more question here concerning the heads with mechanical valve springs. My buddy at work has a 10.50s N/A 347S notchback. He has the AFR 205 heads and he has 10.9:1 CR. I asked him about the springs and he said he just converted his motor to Mechanical Roller instead of hydraulic roller, which most of us know can handle more RPM than hydraulic. My question is, since im planning on ordering the whole valvetrain soon (including the retro-fit hydraulic roller lifter kit to make my '75 351W block a roller) should i just step it up to a mechanical roller setup instead? From what i understand, the reason that you have to get retro-fit lifters to run a standard roller cam is b/c the lifter bores are to short in a flat tappet block, and the roller blocks have longer bores?? right? The guy at work said that the Mechanical roller lifters are shorter than the hydraulic roller......soooo.....could i just run a mechanical roller setup without doing a "roller conversion"?? I think i may go out of my mind soon! Just so many dam options! Can i even do this with my block, or just stick to the hydraulic roller

 

PUNISHER RACING

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Aug 27, 2007

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FORD CITY, PA.

Oct 25, 2007

#2

• Oct 25, 2007

• #2

The reason you need tie bar lifters is that those blocks were never machined for the dogbone and spider setup the factory roller blocks have. They are too tall for one and there is no way to keep the lifters from spinning without the dogbone so a tie bar is used. As far as cams are concerned a hyd. generally leave 10-15 horse on the table over a mech. and about 1,000 rpms its your choice really. With a mech. though you will have to relash periodically.

 

BK_CAULEY

it's built for speed not longevity, woman

Dec 26, 2006

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49

Thomasville, ga

Oct 25, 2007

#3

• Oct 25, 2007

• #3

not trying to derail here... but for a high horsepower car which is better? im talking 900+, roller or solid?

 

PUNISHER RACING

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Aug 27, 2007

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FORD CITY, PA.

Oct 25, 2007

#4

• Oct 25, 2007

• #4

Solid Roller

 

samickguy15

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Sep 1, 2005

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Delavan, IL

Oct 25, 2007

#5

• Oct 25, 2007

• #5

PUNISHER RACING said:

Solid Roller

Click to expand...

X2

For realistic street/strip cars, hydraulic roller.

 

I

importhater5.0

New Member

May 15, 2003

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West Chester, Pa

Nov 5, 2007

#6

• Nov 5, 2007

• #6

Ok, so will i still need some retro fit crap if i go to a solid roller cam setup? Because everything i have seen is just the hydraulic retro fit.........?? My buddy at work is building a '66 289ci block and punching it to a 347, and i asked him about it and he said you can go solid roller without a retrofit kit.........and that the hydraulic needs it obviously like everyone has been telling me.......is this true?? i know you would still need a link bar setup so they dont spin in the bore, but do you need the $500 lifter kit?

 

PUNISHER RACING

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Aug 27, 2007

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FORD CITY, PA.

Nov 6, 2007

#7

• Nov 6, 2007

• #7

just get a solid cam and some solid tie bar lifters

 

Hickfied

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Nov 9, 2005

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Morganton, NC

Nov 6, 2007

#8

• Nov 6, 2007

• #8

LUN-72411LUN. These at Summit are $387

 

I

importhater5.0

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May 15, 2003

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West Chester, Pa

Nov 6, 2007

#9

• Nov 6, 2007

• #9

thanks for all the help everybody, its been a long road to figure out what the heck im doin here haha! I am just going with a solid roller cam and lifters and thats the end of it! Big heads, big cam, 4:30 gears, and some high rpm! Booyaaaah!

 

FastDriver

I was uncomfortably high & wearing a helmet

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Sep 5, 2001

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Vass, NC

Nov 7, 2007

#10

• Nov 7, 2007

• #10

I wonder realistically how much RPM the solid rollers are capable of going to. I'm running hydraulics to 7000 rpm on my 331. So can I go to 9000rpm with a solid roller and a nice valvetrain?

 

I

importhater5.0

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May 15, 2003

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West Chester, Pa

Nov 7, 2007

#11

• Nov 7, 2007

• #11

honestly, im surprised your going to 7000 with hydraulic, thats pushing it. But if you go solid, you can rev to wherever you want to as long as the bottom end will hold. My friend has a 408S with Yates heads, and hes shifting around 7800-8000 and he is obviously running a solid roller valvetrain. My other buddy at work with the 347S in a notch is running 10.37@128 NA and switched from hydraulic rolller to solid roller and he shifts his car at 7500rpm and he goes through the traps with a C4 and 4:30 gears and a 28" tire at 7300. Anything over 7000rpm with hydraulic is asking for trouble. Dont get me wrong, i have done it too, haha! Just got lucky i didnt float any valves. My dad also convinced me to go with the solid roller b/c he had the same setup in an Olds 442, and he was shiftin that puppy at 8200 rpm and it held together with no valvetrain failure. If you are using ur car strictly as a race car, and only hittin da streets every so often go for it! But if you drive on the street all the time, stick with hydraulic. Im sure a lot of the other guys on here can give you some suggestions too, they helped me out a sh*@load! Also, higher rpm doesnt mean ur gonna get a ton more power unless you have the right cam, heads, intake etc. My 2 friends i mentioned have the Yates heads, and AFR 205s and Super Vic. intake with cams around .660" lift, 2" primaries on the headers yada yada yada! haha, good luck!

 

PUNISHER RACING

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Aug 27, 2007

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FORD CITY, PA.

Nov 7, 2007

#12

• Nov 7, 2007

• #12

Hydro rollers can spin the RPM's your valvetrain is just shortlived. The cam in our Pure Street car is a .500 lift hydro with stock lifters and you spin it to 8200 all day.

 

I

importhater5.0

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May 15, 2003

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West Chester, Pa

Nov 8, 2007

#13

• Nov 8, 2007

• #13

Holy Moses! thats impressive! i didnt think you could do that without floatin some valves....Dam.......

 

PUNISHER RACING

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FORD CITY, PA.

Nov 8, 2007

#14

• Nov 8, 2007

• #14

triple comp springs and titanium hardware go a long way the thing that impresses me is the stock lifters stayin alive with darn near 300lbs. on the seat springs. it is alot of fun!

 

I

importhater5.0

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West Chester, Pa

Nov 11, 2007

#15

• Nov 11, 2007

• #15

Man ur not kiddin! thats sick, i would have to say ive never seen that....!