1.8 Rockers on 243's with stock cam 4.8L

[r.barn]

Found a kick ass deal on some used 243's with stock Z06 springs.

For as easy as a head swap is I figured what the hell, it will also lower
compression a tad for the turbo build and boost should really like the 2.0 valves

Question is, should I go ahead put 1.8 rockers on there ?
worth the $200-350 cost vs. hp gained ? Gonna be turbo'd too ....

or just stick with the stock 1.7's from my old heads ?


also, will I need upgraded chromoly pushrods with these LS2 springs ?
length to get ??? 7.4 ???


Thanks

[r.barn]

Anybody ???

[George C]

i wouldnt waste my time or money on a set of 1.8 rockers

[ff_jeff]

I would get the hi-tech push rods from comp. They are not too expensive, and they work great. I like mine. I have the same springs. What cam are you going with?

[r.barn]

I would get the hi-tech push rods from comp. They are not too expensive, and they work great. I like mine. I have the same springs. What cam are you going with?

Staying with the stock 4.8/5.3 cam, why I was asking if I should go
with 1.8's to get a little more lift.

I think Quick is right though. For the cost I dont think 1.8 rockers
will improve power much.

What length of the pushrods ??? The 7.4's seem to be very common, but I dont know.

[George C]

stock lenght rods are 7.4. most cams use 7.4 but when you start milling heads or running thinner head gaskets then longer or shorter ones need to be used

[r.barn]

Before I order them, let me check specs with yall

5/16
7.4
Hardened Chromoly
one piece.

COMP Cams 7955-16 - COMP Cams Hi-Tech Pushrods - summitracing.com


Heads should be here Friday
$450 to my door.

[Madd Maxx]

If you're keeping the stock cam, you won't need new pushrods - even with the 918 springs. The stock cam is pretty much done at 5000 RPM. The factory pushrods will work fine at that RPM level. I would only go with stiffer pushrods if you exceed 6000 RPM.

As for the rocker arms, on your stock engine they will only give you about a 5-10 HP gain. However, with a turbo, that gain will be amplified. How much will depend on your boost level, but a 20-25 HP increase would not be unreasonable. Whether the cost is justified is your decision.

If you really want that turbo to shine, you should install a bigger cam. Something in the 210- 215 range would work well. The factory unit is pretty anemic (190).