High RPM roller lifters

giddyup306

Founding Member

Oct 22, 2002

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Jan 16, 2011

#21

• Jan 16, 2011

• #21

Sorry, but I could only read a few of the posts before I started ignoring the trash talking....

IMHO, anything over 6,500 requires a nice set of lifters. I run a set of Crower.

Crower 66215H-16 - Crower Roller Lifters - Overview - SummitRacing.com

My shift point is at 8,200.

 

Shaolin Crane

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Oct 6, 2008

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Kommiefornia

Jan 16, 2011

#22

• Jan 16, 2011

• #22

Those look VERY similar to the morel link bar lifters, and they are a great price so i will be going with those.

 

I

IcantDo55

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Apr 2, 2004

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Va Beach

Jan 17, 2011

#23

• Jan 17, 2011

• #23

I'm running stock lifters up to 7200rpm, no issues. Its a A4 block Zero balanced. The engine builder I used was very specific about the oil pump to support the lifters.

 

Shaolin Crane

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Oct 6, 2008

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Kommiefornia

Jan 17, 2011

#24

• Jan 17, 2011

• #24

IcantDo55 said:

I'm running stock lifters up to 7200rpm, no issues. Its a A4 block Zero balanced. The engine builder I used was very specific about the oil pump to support the lifters.

Click to expand...

I dont doubt stock lifters can do the RPM's but the heads, springs, and cam all take effect in how high you can rev it.

 

I

IcantDo55

New Member

Apr 2, 2004

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Va Beach

Jan 17, 2011

#25

• Jan 17, 2011

• #25

Shaolin Crane said:

I dont doubt stock lifters can do the RPM's but the heads, springs, and cam all take effect in how high you can rev it.

Click to expand...

AFR heads, Shaft mounted rockers with hardened push rods, guide plates, titanium retainers, springs for the application.

 

Shaolin Crane

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Oct 6, 2008

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Kommiefornia

Jan 17, 2011

#26

• Jan 17, 2011

• #26

IcantDo55 said:

AFR heads, Shaft mounted rockers with hardened push rods, guide plates, titanium retainers, springs for the application.

Click to expand...

Yeah but whats the seat pressure on the springs, I highly doubt my application would allow me to run stock lifters if I am already experiencing float.

 

giddyup306

Founding Member

Oct 22, 2002

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Jan 17, 2011

#27

• Jan 17, 2011

• #27

Shaolin Crane said:

Those look VERY similar to the morel link bar lifters, and they are a great price so i will be going with those.

Click to expand...

I actually bought a set used on eBay for something like $300. The guy offered a 7 day 100% guarantee, and they are 100% rebuildable, so I wasn't worried. They either were just rebuilt, or they only had like one run on them. The only thing you really need to worry about is if the rollers roll freely. I've heard with some high lift cams (like .700") that it can ruin the needle bearings.

Shaolin Crane said:

Yeah but whats the seat pressure on the springs, I highly doubt my application would allow me to run stock lifters if I am already experiencing float.

Click to expand...

I'm running a PBM race valve train kit. The springs are something like 180# seated. That might be too much for your application tho. You can and can't have too much valve pressure. If you go to small you get valve float, if you go too big you not only loose horsepower, but you don't want the pushrod to deflect. That's when stuff starts to break.

 

Shaolin Crane

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Oct 6, 2008

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Kommiefornia

Jan 17, 2011

#28

• Jan 17, 2011

• #28

yup, the Morels apparently are who makes lifters for alot of companies. And Ed hooked me up with them for $345 shipped