4

Pushrod Too Long: Notice how the pattern is wide, and shifted to the exhaust side of the valve tip.



5

Pushrod Too Short: Notice how the pattern is wide, and shifted to the intake side of the valve tip.



6

Pushrod Length Correct: Notice how the pattern is narrow and is centered on the valve tip.













C. Rockers

What they are: HS 1 / 2, Comp Magnums, Comp Shaft, Crane, SLP 1.85

What they do: transfer the cam motion along from the pushrods and accentuate the valves to open

What to look for:

- New rockers are also an optional choice during a cam install.

- The stock roller tip rockers have been known to loose there bearings but it's not an overly common occurrence.

- One problem people have experienced with the HS and YT rockers are valvetrain issues at high RPM's due to the added weight of the rockers, coupled with heavy dual springs with undesirable harmonics.

A good alternative is to run the stock rockers retro-fitted by Nasty Nate. They are stock rockers which keep the weight down but the trunion bearings have new C-clips which prevent the needle bearings from spilling.

- Adjustable rockers allow you to adjust lifter pre-load; a must for Comp R's (875's)

- Higher ratio rockers can be used to increase lift (see cam lift for more info). Along with increasing the valve lift adding higher ratio rockers also nets you an extra degree or two of duration at the valve and increased overlap.

- Jesel SS Shaft Mount: INSTALL GUIDE



D. Others

- It's a good idea to install a new timing chain as well. The stock ones are notorious for having a lot of slack in them

- You can either get a single (JWIS) or double (my rollmaster)

the most economical route is the LS2 chain pt# 12586482 ordered from SDPC

- The double chains come with the needed spacers to clear the oil pump

- 98-00 cars should also factor in a new oil pump

- A new chain and oil pump should run you about 200 dollars

Stock specs



Full race cam vs. 3/4 race cam

Left - full race cam. Center- "standard" cam. Right - 3/4 race cam.





The info in these links will show you combos Jasper is using to make the different HP and TQ ratings.

LT1 5.7" 340 HP

TBI 350" 250 HP

350" 280 HP

350" 300 HP

350" 300 HP Vortex

350" 325 HP

350" 350 HP

350" 360 HP Panther

TBI 383" 280 HP

383" 325 HP

383" 330 HP

383" 385 HP

400" 350 HP

454" 400 HP

454" 429 HP

Degreeing a cam...the easy way.

http://www.cranecams.com/pdf/803.pdf

Head porting

http://www.sa-motorsports.com/diyport.aspx

This will give you your cam options for your engine

http://www.compcams.com/Technical/CamHelp/

High Performance Valvetrains

http://www.aa1car.com/library/perfor...valvetrain.htm

TBI head flow info

http://www.thirdgen.org/techboard/tb...-headflow.html