i was wandering if i would gain anything by switching out my stock lifters.

my car doesn't lope as much as other cars i've heard with the same cam.

 

You'd gain nothing noticeable if your stock lifters are in good shape.

As for not loping as much as others with the 503, just lower your idle a bit?

 

There has been articles recently that showed the new Rhoads Hydraulic lifters gained some HP on an LS6 or LS1 motor with a stock and huge TPIS cam. Rhoads have been around for many years but just introduced a Hydraulic Roller lifter for us. I used the old style hydraulic lifters they had in a Big Block Chevy, and the idle was better, and vacuum went up. So, yes you can make more power. This is going to be a big arguement from the forum though, IMHO.
http://www.rhoadslifters.com/

 

the idle is already set at 650

 

any hp gain by swiching lifters?

No

 

If you want more lope and already have the idle set that low the next step would be to have the tuner play with the timing a little, wont gain you power but could get you more lope.

 

SO the article that did a dyno test was false useing Rhoads Lifters? The vacuum went up, HP and Tq went up to.
If lifters dont have the capability to make more HP etc, then why dont we all just use OEM for all Hydraulic Roller lifter cams, regardless of size.

 

I have used Rhodes lifters back when they were the Trick of the day(late '60's). They were a pain in the ***.

Ya should get some and see.

In my customers builds OEM lifters is all I use and never had a problem. Turn them 7000 and have been over 500FWHP, don't see a reason to change.

While ya are at it get some Comp "R" and try them. They don't have many problems and their adv is for more of everything.

 

1racerdude, I have used Rhoads before(read my original post), and if you think there a PITA, sorry, worked fine for me, and brought my vacuumm back up to where my brakes worked a little better.
I have used 3 sets of Comp Cams R lifters, as far as i am concerned, they are just noisy, no real gain.
But in the original post of this guys post, he asked if there is any gain in changeing lifters, and based on Dyno sheets, there is. I asssume you have done back to back dynos(motor only, no car dyno) and seen absolutely no gain in going from an OEM to a Rhoads? Until you have, dont tell the guy you know something when you dont. Have a nice day.
BTW, where in Alabama are you from?

 

Ya should try them.
Like I said they are a pain in the ***. They are dependent on your oil pressure to work right. If ya got 80Psi then they pump up but the other end being at 40Psi they won't back down.
I have done tests at Wesco with these lifters. Made more HP with a set of Crane anti pump up's after they were changed.Found no advantage and a lot of disadvantages. One is the damn clacking,another is the not backing down when they are suppose to
How can it make more than the cam gives with a standard lifter on the peak number. They make maybe 2lf at given RPM's through taking duration out
and that ain't enough to put up with the hassle. But if your oil pressure wont let them work,that to me means they don't work.

So until ya know and have experienced a REAL test don't flap your gums.

If they work for you--- fine--- but I wouldn't recommend them to anyone and I wouldn't put them in my lawnmower.

As far as Comp lifters read the sticky on the opening page.
Ya just have exceptional luck or ya don't know how they are suppose to work and if it cranks and runs they are OK.

 

Rhoads lifters are supposed to help tame a too large cam by making the tickle the vavles as if it were smaller helping improve lowend and vacuum. Don't think I ever saw even a claim of a peak HP gain.

People use non-stock lifters for different reasons and I really don't think power is one of them. Lifters like the Comp Rs are supposed to handle the high spring pressures and rpms better, not so much of a more power as they are intended to handle those abuses better, now wether they accomlish that is another debate

 

Car mags are well known for doctoring dyno "tests" and TPIS is not what I would call a reputable source either they do a lot of advertizing and selling overpriced parts and little in the way of performance delivery.

Don't know who 1racerdude works for but it well recognized practice to even reuse the stock lifters yes the used ones not even new stockers.
Sounds like you are an advertizers wet dream you blindly believe what they print when trying to get you to spend a few hundred dollars. This is why it can be so hard to get good parts.

If you really read the car mag articles they even give you some clues as to how they doctor ADVERTIZERS parts "tests" like the Granatelli MAF test from a few months back, they come right out and say they replaced the filter too but then attribute the gains to the MAF . CROOKS and liars, this forum can give you much better and more accurate info.

 

Steves396lt1

If you would like to keep it "technical".... fine. But it is not acceptable to start calling people names and insulting them because of where they live, and the fact that they do not agree with you. Stick to the issues, or don't post. Or if you continue to include the insults, your posts will be deleted.

 

I was interested in these lifters.

But with LT1 or any car with a knock sensor, you have to watch out.

The added clacking could lead to false knock and retarded timing.

This would not be a problem on non-computer engines.

I would love to have a fuctional variable timming system, but I don't think that roades gets the job done.

1racerdude is an engine builder, I would trust his word over a magazine, he has no reason to steer you wrong, not always true with magazines that sell ad space.

My .02 worth.

Z28

 

Steve,

I'm glad your going to miss out on Larry's knowledge. He might not be right all of the time, but he's right enough a large amount of the time plus he has a lot of experince on you, and that is worth a ton.

FWIW I know a few people in the magazine world and if you don't spend advertising money with them you don't get articles. It's not 100% like this but it's pretty close.

Also if you want to look for power with lifters than you need to work as a entire system. Lobe acclerations, spring pressures, rocker arm ratios along with lifter design in a hyd roller setup can find you something.

I'm not commenting on the Rhoades lifters or the dyno tests of them. You have your own money and opinion to go try them out.

Bret