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roller rockers ?
hey im thinking about getting some rockers for my ecotec and just wondering about the ratios i no on the diff the higher ratio higher revs on highway what is the advantges and disadvantages of higher ratio rockers thanx heaps
Donati..Whoa Green
The higher the ratio, the more air is allowed in and out of the cylinders. This is good.
The higher the ratio, the more strain is placed on the springs, pushrods, cam, timing chain. This is bad. But not bad as in your car will shit itself in a few months, more that if the components are dying, this may push them off.
Check out MACE engineering, they have a few sorts. Mace Engineering Group - Specialising in powering Australia's best Commodores | Automotive performance accessories
-Democracy must be something more than two wolves and a sheep voting on what to have for dinner.
James Bovard, Civil Libertarian (1994)
-Giving money and power to government is like giving whiskey and car keys to teenage boys.
P.J. O'Rourke, Civil Libertarian
-Government's view of the economy could be summed up in a few short Phrases: If it moves, tax it. If it keeps moving, regulate it. And if it stops moving, subsidize it.
Ronald Reagan (1986)
diagnostic technician...
go through mace do very good kits
1.6 is standard 1.91 is high
on some previous fumbling at approximately 2.20 you have issues thats why mace only sell up to 1.96??? just contact mace man ~!
Donati..Whoa Green
At about 2.2 I would be wondering why my car won't turn on, why my valves are all bent, and where the hell did my pistons go?Originally Posted by db_notso
-Democracy must be something more than two wolves and a sheep voting on what to have for dinner.
James Bovard, Civil Libertarian (1994)
-Giving money and power to government is like giving whiskey and car keys to teenage boys.
P.J. O'Rourke, Civil Libertarian
-Government's view of the economy could be summed up in a few short Phrases: If it moves, tax it. If it keeps moving, regulate it. And if it stops moving, subsidize it.
Ronald Reagan (1986)
Cammed & Eventualy Blown!
i used the 1.98.1 yella terra ones, they were also very good, didnt have any problems either with them
Donati..Whoa Green
I used to have FIT 1.97:1 and never had a problem for the years I had them.
-Democracy must be something more than two wolves and a sheep voting on what to have for dinner.
James Bovard, Civil Libertarian (1994)
-Giving money and power to government is like giving whiskey and car keys to teenage boys.
P.J. O'Rourke, Civil Libertarian
-Government's view of the economy could be summed up in a few short Phrases: If it moves, tax it. If it keeps moving, regulate it. And if it stops moving, subsidize it.
Ronald Reagan (1986)
crappy ol' VN driver
YT max ratio is 1.95:1
FIT max ratio is 1.97:1
MACE max ratio is 1.98:1 with stock heads or 2.15:1 with modified heads
there are some issues with clearance in the push rod holes of the late model ecotecs because Holden got real slack with there head molds when they knew the ecotec production was going to end. so with that in mind, MACE only recommend 1.9:1 high ratio rockers with new push rods for all VY models unless you remove the casting flashes from the push rod holes in the heads.
stock ratio for the buick V6 is 1.6:1, ecotec 1.65:1
Body by Holden, Soul by Brock
the Legend will live forever
VN exec T5: 15.1sec @92.2mph 1/4 mile, 9.7sec @ 74.6mph 1/8mile, 2.3sec 60ft, 0-60mph 6.827sec 22/11/07 Gtech competition
diagnostic technician...
see smomeone else knows mace will help ya out man
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