big power n/a builds?

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Jun 28, 2011 | 09:52 PM

#41

Wicked94Z

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From: Spokane, Wa

Quote:

Originally Posted by SS RRR

That also depends on the pushrod length. Some of the solid lifter/link bar style HIPPO lifter bodys are much taller allowing to run a significantly shorter, small diameter pushrod with stud mount rockers.

Pushrod length isn't that key, your 5/16s are like spaghetti with the springs you're running. I'd upgrade to a set of 3/8 .135 walls with the appropriate guide plates if I were you, perhaps a before/after comparison for the LT1 masses

Jun 29, 2011 | 07:57 AM

#42

SS RRR

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From: Jackstandican

Quote:

Originally Posted by Wicked94Z

Maybe I'll pick up all those lost horsie powers...
If that were truly the case there would be signs of wear on the pushrod walls. I would somewhat agree if they were close to stock length, however mine are more than an inch shorter than stock.

Jun 29, 2011 | 08:05 AM

#43

quik95lt1

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From: Rhode Island

Quote:

Originally Posted by SS RRR

how long is the pushrod you are running??

Jun 29, 2011 | 08:23 AM

#44

SS RRR

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From: Jackstandican

Quote:

Originally Posted by quik95lt1

how long is the pushrod you are running??

6.125"

Quote:

Originally Posted by joelster

All of the solid lifters have the pushrod recessed way down into the lifter body.

There are Isky Red Zones which have a full body to accomodate a hydra rev kit if need be.

Jun 29, 2011 | 08:25 AM

#45

quik95lt1

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From: Rhode Island

Quote:

Originally Posted by SS RRR

6.125"

There are Isky Red Zones which have a full body to accomodate a hydra rev kit if need be.

holy lifter mass!!!! those things are massive lol.........

Jun 29, 2011 | 08:33 AM

#46

quik95lt1

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From: Rhode Island

heres the ones i run in mine........they barely make it out of the bore they are short.....but they are light!!

of course i run a muchhhhh longer pushrod.....a 1 piece 3/8" from CP

Jun 29, 2011 | 08:38 AM

#47

SS RRR

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From: Jackstandican

I ordered the lifters over four years ago. I believe the HIPPO market was fairly new. I read and heard the debates of Comp's QC issues and many recommended to use Iksys. I don't think they had anything but the full body lifters at that point in time.

Jun 29, 2011 | 08:41 AM

#48

quik95lt1

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From: Rhode Island

Quote:

Originally Posted by SS RRR

oh yea that makes sense then........i heard the same about Comp as well........i ran the Morel Lighweight HIPPO in mine......like you agree the lfiters are no place to skimp on a SR motor

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Jun 29, 2011 | 09:48 AM

#49

Puck

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Quote:

Originally Posted by SS RRR

They don't need to be flexing to the point of head contact to be costing you power.

A pushrod that short though wont be as likely to flex as an 8"+ pushrod under tons of spring pressure, so diameter wont be as critical. I'd swap em anyway just as an experiment

Jun 29, 2011 | 10:57 AM

#50

SS RRR

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From: Jackstandican

Quote:

Originally Posted by Puck

They don't need to be flexing to the point of head contact to be costing you power.

But they would be making excessive contact on the guideplates.

Quote:

A pushrod that short though wont be as likely to flex as an 8"+ pushrod under tons of spring pressure, so diameter wont be as critical. I'd swap em anyway just as an experiment

I think my heads would have to be clearanced to accommodate 3/8" PR's, and because I don't see excessive wear on the PR walls, I don't think they are flexing. In your opinion, what kind of spring pressures need a 3/8" PR?

Last edited by SS RRR; Jun 29, 2011 at 11:19 AM.

Jun 29, 2011 | 11:29 AM

#51

Puck

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Quote:

Originally Posted by SS RRR

But they would be making excessive contact on the guideplates.

I think my heads would have to be clearanced to accommodate 3/8" PR's, and because I don't see excessive wear on the PR walls, I don't think they are flexing. In your opinion, what kind of spring pressures need a 3/8" PR?

The general consensus is to run as big of a PR as you can fit, since even if it doesn't help in your case it wont hurt anything. Also, you can run a thinner walled thicker diameter PR and actually save weight, while being even stiffer.

PR length, RPMs, and spring pressures all play a part so there isn't a set spring pressure across the board, but I have seen 3/8th PRs recommended for even mild SR builds with modest spring pressures.