Re: Flat tappet combos
[Re: 1967dartgt]
#1349943
12/12/12 12:36 AM
12/12/12 12:36 AM
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Joined: Mar 2010
Posts: 1,880 Out in Left Field, NY
bobs66440
top fuel
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top fuel
Joined: Mar 2010
Posts: 1,880
Out in Left Field, NY
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Quote:
Quote:
Hydraulic or solid rollers have their own dangers. If you do a search you will find a growing number of posts and complaints about rollers disintegrating and releasing tiny needle bearings free to take the scenic route through your engine.
There's nothing wrong with a flat tappet setup as long as it's broken in properly using the proper oils/additives. And it's a good idea to run a zinc additive after break-in with every oil change.
Factory cars go 100,000 mi plus with no problems with hyd rollers. I have never heard of a hyd roller failing, solid yes but a hyd roller no.
You are correct. The hydraulic rollers are much more reliable than the solids.
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Re: Flat tappet combos
[Re: 68 HEMI GTS]
#1349946
12/13/12 04:25 PM
12/13/12 04:25 PM
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Joined: Nov 2005
Posts: 808 mckinney texas
shoebox
super stock
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super stock
Joined: Nov 2005
Posts: 808
mckinney texas
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Quote:
i am unimpressed with the hyd roller i put in my 440. since then I've been searching for dyno #'s on Big block mopars with hyd rollers on the net. looks like they all start to give up around that 5800 mark give or take a few hundred rpm. that's about where mine fizzles. it runs like a bear up till that point. a set of beehive's might help it but im pretty disillusioned. it'll twist higher but its just not there. i think they're perfectly fine for some one who just want to cruise their car around. or even a low rpm stroker. i hate to give up on mine because it wasn't a cheap proposition, but it will probably be coming out this winter for a solid.. unfortunately it wont be a easy swap with my home made valley tray... got a .557 cam brand new in the box, thinking that might give it the kick im looking for.
What are those blue rockers?
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Re: Flat tappet combos
[Re: mshred]
#1349950
12/14/12 01:28 AM
12/14/12 01:28 AM
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Joined: Jul 2006
Posts: 4,319 Puyallup, WA
StealthWedge67
master
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master
Joined: Jul 2006
Posts: 4,319
Puyallup, WA
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Most everything I've read suggests that a solid flat tappet will outperform a hydraulic roller. I still believe that if your goal is a street/strip motor that will make good power, be trouble free and and live for years; an aggressive solid flat tappet makes a very strong argument.
Last edited by StealthWedge67; 12/17/12 03:18 AM.
LemonWedge - Street heavy / Strip ready - 11.07 @ 120
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