Rear Wheel Horsepower Gains out of Roller Rockers???
06-19-2006, 08:23 AM
#1
Rear Wheel Horsepower Gains out of Roller Rockers??? I was wanting to put roller rockers on my car and was wanting to know what kind of gains I would see in horsepower? The car makes 422rwhp and 389tq right now. What are the best rockers for the money, because im not rich lol and fit the best. I seen that some need valve cover spacers and that maybe fine. All suggestions appreciated.
06-19-2006, 08:30 AM
#2
i guess it would depend on how much bigger RR's u get, but i wouldnt expect anything more then 10-15 HP. i know some places advertise that u will see more then that but i wouldnt expect much more then that, and there supposed to free up the valvetrain and make everything run smoother which would be more important to me then the added power.IMO
06-19-2006, 06:20 PM
#6
Originally Posted by redtail2426
5 if your lucky,all the aftermarket rockers are heavier then the stockers too,so be sure your valvesprings are up for the added weight.
If you went to the Cranes, there are no modifications required if you have center bolt valve covers.
06-19-2006, 10:15 PM
#7
Originally Posted by DEVIATE
Well the Harland sharp rockers are not heavier they are light. It damn near takes two of them to weight what one stock one does. just my .02 cents
H/S 1.7 Non adj - 132.8g overall, 22.5g at the valve
Crane LS1 1.8 - 149.1g overall, 22.3g at the valve
Happy motoring.
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06-19-2006, 11:49 PM
#9
Originally Posted by Evans752
So Harland Sharpes or Cranes would be the best. Which one clears the stock valve covers the best? Thank You. Been thinking about the Harland Sharps.
06-20-2006, 02:30 PM
#12
Launching!
Originally Posted by 405HP_Z06
Stock Rocker - 140.1g overall, 8.2g at the valve
H/S 1.7 Non adj - 132.8g overall, 22.5g at the valve
Crane LS1 1.8 - 149.1g overall, 22.3g at the valve
Happy motoring.
H/S 1.7 Non adj - 132.8g overall, 22.5g at the valve
Crane LS1 1.8 - 149.1g overall, 22.3g at the valve
Happy motoring.
06-20-2006, 04:02 PM
#13
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i think its supposed to be 8.2,the stockers are very light over the valve.Thats why with aftermarket rockers you need to be sure your still maintaining valve control at high rpm.
06-20-2006, 08:07 PM
#15
Originally Posted by Dan_the_C5_Man
Is this a typo, i.e. it should be 28.2 not 8.2?
06-20-2006, 08:09 PM
#16
Originally Posted by BYUNSPEED
I have the 1.7s and roller tips will make your valve train love you more. With the stock ones you can eventually lead up to "mushrooming" on the stems.
Also I have the Harland Sharps and some cars do need modifications.
Both vavle covers had to be cleared but was easily done with a dremel. Just knock out the round bumps and some parts of the valve cover and the baffles will need to taken out.
On the passenger side head toward the front, I had to get the inner sidewall of the head dremel out, not too much. The drivers side went in fine.
Also I have the Harland Sharps and some cars do need modifications.
Both vavle covers had to be cleared but was easily done with a dremel. Just knock out the round bumps and some parts of the valve cover and the baffles will need to taken out.
On the passenger side head toward the front, I had to get the inner sidewall of the head dremel out, not too much. The drivers side went in fine.
06-22-2006, 06:39 PM
#18
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yeah thats the only thing about the stockers,unless you send them to nasty performance to get different bearings then you risk loosing the little bastards in your engine.
06-22-2006, 06:42 PM
#19
Originally Posted by BYUNSPEED
I have the 1.7s and roller tips will make your valve train love you more. With the stock ones you can eventually lead up to "mushrooming" on the stems.
Also I have the Harland Sharps and some cars do need modifications.
Both vavle covers had to be cleared but was easily done with a dremel. Just knock out the round bumps and some parts of the valve cover and the baffles will need to taken out.
On the passenger side head toward the front, I had to get the inner sidewall of the head dremel out, not too much. The drivers side went in fine.
Also I have the Harland Sharps and some cars do need modifications.
Both vavle covers had to be cleared but was easily done with a dremel. Just knock out the round bumps and some parts of the valve cover and the baffles will need to taken out.
On the passenger side head toward the front, I had to get the inner sidewall of the head dremel out, not too much. The drivers side went in fine.
Is that true? Any dyno thread to back this up? If its true, ill get a set. 20 ponys for 400 bucks is awsome.