Rhoads lifters
Originally Posted by Another_User
I was looking at some info on lifters (independant from what Rhodes says) and they seem like a sound investment for a big cam...is anybody running these in an LS1 that can comment?
Joined: Nov 2003
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From: Wichita KS / Rancho San Diego
They are commonly used in traditional Pontiac engines; until now I've never heard of them for LS1's. I would say a consensus opinion for traditonal Pontiacs would be: they work as advertised. Some guys can't stand the noise, it doesn't bother other guys. My guess is that the same factors will apply to LS1 roller type use.
Originally Posted by RevGTO
They are commonly used in traditional Pontiac engines; until now I've never heard of them for LS1's. I would say a consensus opinion for traditonal Pontiacs would be: they work as advertised. Some guys can't stand the noise, it doesn't bother other guys. My guess is that the same factors will apply to LS1 roller type use.
Killing bottom end TQ on a Pontiac goes against the basic design of the engine. It certainly aint a top end engine.
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From: Spring Hill, TN
Originally Posted by 2c5s
Killing bottom end TQ on a Pontiac goes against the basic design of the engine. It certainly aint a top end engine.
I have them in my '70 GTO and they enable me to have 14" of vacuum at 700rpm idle with a cam designed for max power above 4K rpm. The power band is very flat (partly because of the engine's properties). It hasn't been dyno'd yet but I'm expecting 500lb/ft of TQ from 1800-5000rpm. Without the Rhodes lifters I'd have to settle for a little more of a peak in the power band.
I know nothing about these lifters in a Gen III though.
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From: Corpus Christi
I read the article in Hot Rod Mag. very intersting. in short. it's if you want to keep vacuum press. for engine to run efficiently. will cause a big cam to sound almost normal. imo, thats defeating the purpose of a big cam. 
fuerzaws6
fuerzaws6
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From: Spring Hill, TN
Originally Posted by cowboysfan
I read the article in Hot Rod Mag. very intersting. in short. it's if you want to keep vacuum press. for engine to run efficiently. will cause a big cam to sound almost normal. imo, thats defeating the purpose of a big cam.
fuerzaws6
fuerzaws6
It will serve to increase fuel economy, idle vacuum, driveability...And you can even fine-tune the effect by varying the oil viscosity.
According to TPIS and Hot Rod mag a cam needs to provide at least 14.5 inches of vacuum at idle for reliable computer operation. The stock LS1 cam provides a stout 22 inches of vacuum. The larger cam tested (236/241, .602/.568, 113lsa) provided a very weak 10 inches of vacuum, causing a shitty running car on the stock tune. When using the big 236 cam with the Rhoads lifters vacuum at idle increased to a healthier 15 inches providing better drivability and more low end torque. TAP TAP TAP
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From: one step ahead of you
RL-1728X
1 Set - Chevy, GMC & Truck (Buick, Cadillac, Oldsmobile, Pontiac)
1998-03 4.8L, 5.3L, 5.7L, 6.0L Gen III
2001-03 5.7L Corvette
$ 239.00
It doesn't say anything about only exhaust valves on their site. It is the whole set. I like the idea behind them.
1 Set - Chevy, GMC & Truck (Buick, Cadillac, Oldsmobile, Pontiac)
1998-03 4.8L, 5.3L, 5.7L, 6.0L Gen III
2001-03 5.7L Corvette
$ 239.00
It doesn't say anything about only exhaust valves on their site. It is the whole set. I like the idea behind them.
