Roller Rocker HP?
Originally Posted by undercoverz-28
i'm going to a crane cam roller rocker gold series 1.6 ratio and was just wondering what kind of hp/torque increase i should see. thanks.
If your engine is stock, and you have not bought the rockers yet, I would spend my money elsewhere. My track times did not improve at all.
good luck, Ed
Thread Starter
Teching In
Joined: Feb 2006
Posts: 33
Likes: 0
From: Tallahassee, Fl
i have all the basics. CAI, headers, 3" exhaust with no cat and underdrive pully. well at least that everything done under the hood. after the rockers i plan on new gears (most likely 3.90's) then cam then head work.
Originally Posted by Ed Wright
I put a set on mine when it was stock
Originally Posted by Ed Wright
How long between tests? Was the car moved from the dyno between tests?
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Originally Posted by thesoundandthefury
Are you talking stock as in the longblock is untouched but it has bolt ons, or BONE stock as in the rockers were the very first thing you did to the motor?
I'm talking the original 120,000 mile engine, that had never even had the valve covers off. Stock exhaust, 3.23 gears, stock converter, etc. Only PCM tuning.
Changes that small need done same day, without moving the car off the rollers. you can take a car off, and put it back and often get different numbers, due only to slight changes in alignment with the rollers. The weather stations that comes with these dynos, and weather correction software is not as great as some would like to believe. Very small changes, tested on different days may or may not be accurate. You don't really know unless you make the changes with the car on the dyno, after making three or four baseline pulls in the original configuration. Then four or so pulls with the new parts, and average the pulls both ways. Coolant temp is so critical to the LT1/LT4 (or any iron block engine) as well as intake air (with any engine) power output that those have to be the same before and after the changes also. Otherwise you don't really know where you are. I would not bother with rockers until I had it apart for the cam.
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Originally Posted by Ed Wright
I'm talking the original 120,000 mile engine, that had never even had the valve covers off. Stock exhaust, 3.23 gears, stock converter, etc. Only PCM tuning.
Changes that small need done same day, without moving the car off the rollers. you can take a car off, and put it back and often get different numbers, due only to slight changes in alignment with the rollers. The weather stations that comes with these dynos, and weather correction software is not as great as some would like to believe. Very small changes, tested on different days may or may not be accurate. You don't really know unless you make the changes with the car on the dyno, after making three or four baseline pulls in the original configuration. Then four or so pulls with the new parts, and average the pulls both ways. Coolant temp is so critical to the LT1/LT4 (or any iron block engine) as well as intake air (with any engine) power output that those have to be the same before and after the changes also. Otherwise you don't really know where you are. I would not bother with rockers until I had it apart for the cam.
Changes that small need done same day, without moving the car off the rollers. you can take a car off, and put it back and often get different numbers, due only to slight changes in alignment with the rollers. The weather stations that comes with these dynos, and weather correction software is not as great as some would like to believe. Very small changes, tested on different days may or may not be accurate. You don't really know unless you make the changes with the car on the dyno, after making three or four baseline pulls in the original configuration. Then four or so pulls with the new parts, and average the pulls both ways. Coolant temp is so critical to the LT1/LT4 (or any iron block engine) as well as intake air (with any engine) power output that those have to be the same before and after the changes also. Otherwise you don't really know where you are. I would not bother with rockers until I had it apart for the cam.
Your thoughts?
Originally Posted by undercoverz-28
i'm going to a crane cam roller rocker gold series 1.6 ratio and was just wondering what kind of hp/torque increase i should see. thanks.
Launching!
Joined: Feb 2005
Posts: 253
Likes: 0
From: Los Angeles, CA
Yeah I have a 96 lt1. I have a set of cranes energizer 1.6 rr sitting around. Everyone said to not bother putting them on because the power increase wasn't anything special unless you have some internal work done.
But I wonder if it would be a good idea to throw them on now since I am doing a 100 shot? Would it be a little easier on the motor?
Do I need different valve springs even though its a stock cam and everything?
But I wonder if it would be a good idea to throw them on now since I am doing a 100 shot? Would it be a little easier on the motor?
Do I need different valve springs even though its a stock cam and everything?
