L48 Pros/Cons of using 1.5 or 1.6 Rockers ?
01-25-2012, 04:35 PM
#1
Heel & Toe
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L48 Pros/Cons of using 1.5 or 1.6 Rockers ?
I am pulling the motor to replace gaskets, seals & clean everything. Motor has 54K on it. I plan on blending the bowls in the heads myself [done this before]. I'll put in a new timing chain and gear set but that will probably be all I can afford. I would love to put in a new cam & lifters but income is very low and I just can't afford to do it. So I was doing some reading and it seemed like the 1.6 rockers, even on a stock cam, might give me some worthwhile gain. I was thinking that may be the way to go because I wanted to get roller tipped rockers and a cam & lifters but like I said money is tight. I wish I could do all the things I want to but, well, don't we all?
01-25-2012, 05:34 PM
#2
Burning Brakes
I am pulling the motor to replace gaskets, seals & clean everything. Motor has 54K on it. I plan on blending the bowls in the heads myself [done this before]. I'll put in a new timing chain and gear set but that will probably be all I can afford. I would love to put in a new cam & lifters but income is very low and I just can't afford to do it. So I was doing some reading and it seemed like the 1.6 rockers, even on a stock cam, might give me some worthwhile gain. I was thinking that may be the way to go because I wanted to get roller tipped rockers and a cam & lifters but like I said money is tight. I wish I could do all the things I want to but, well, don't we all?
These rockers can help in the power department but not much. The amount of money most of them cost you can buy a better cam and lifter set be better off overall.
01-25-2012, 07:38 PM
#3
Le Mans Master
The simple answer is this isn't an option for you right now; 1.6 rockers typically require clearancing the pushrod holes on a stock head...which really, really should not be done with the heads attached.
1.6 rockers give an effective increase in duration which has power benefits, but as noted it's not worth doing just the rockers. If you're buying a new set of roller-tips, then go ahead and buy 1.6's...but be sure to a) do the math and b) check all valvetrain clearances and geometry. Note that different pushrods and valve covers may be required...so the amount of time and money you're going to put in is going to be far higher than just swapping rockers
1.6 rockers give an effective increase in duration which has power benefits, but as noted it's not worth doing just the rockers. If you're buying a new set of roller-tips, then go ahead and buy 1.6's...but be sure to a) do the math and b) check all valvetrain clearances and geometry. Note that different pushrods and valve covers may be required...so the amount of time and money you're going to put in is going to be far higher than just swapping rockers
01-25-2012, 07:41 PM
#4
Race Director
I am pulling the motor to replace gaskets, seals & clean everything. Motor has 54K on it. I plan on blending the bowls in the heads myself [done this before]. I'll put in a new timing chain and gear set but that will probably be all I can afford. I would love to put in a new cam & lifters but income is very low and I just can't afford to do it. So I was doing some reading and it seemed like the 1.6 rockers, even on a stock cam, might give me some worthwhile gain. I was thinking that may be the way to go because I wanted to get roller tipped rockers and a cam & lifters but like I said money is tight. I wish I could do all the things I want to but, well, don't we all?
01-26-2012, 07:24 AM
#6
Le Mans Master
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budget cam & lifters kit aok.
L48 needs all compression it can get.
Use thinnest head gasket you can ... felpro 1094 is good choice here.
if your best friend/brother runs machine shop ... mill heads & intake.
L48 needs all compression it can get.
Use thinnest head gasket you can ... felpro 1094 is good choice here.
if your best friend/brother runs machine shop ... mill heads & intake.
01-26-2012, 10:04 AM
#7
Team Owner
Member Since: Oct 2004
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St. Jude Donor '05
Make sure and upgrade the springs either way.
You can get a set of Z28 type springs for $40..long as you dont go crazy on cam size sometimes less is more. Roller tips are just fine until you get into heavier spring pressures.
Between cam/spring/bowl work for the $ spent youll definitely feel it in the butt dyno
01-26-2012, 02:00 PM
#8
Safety Car
