Cobra4B

iTrader: (9)

I bought the G5-X2 cam kit from LGM that comes w/ comp 921s, new seats, seals, Ti retainers, and 7.400" hardened pushrods.

Just did some searching on here and 7.425" keeps comming up. So which is it?

I"m running my stock heads and valves ('01 Z06) so they're 243 castings, and also running my stock rocker arms.

What's the stock length? 7.350"?? I comparted them side/side and the new ones looked a smidge longer.

TORCHD 02 TA

iTrader: (39)

what is the spec on the G5-X2??

purdueranger

iTrader: (11)

G5X2 = 232/240 .595/.608 112/114

This is from LGs website.

I ran that cam with 7.4" pushrods and now I am running the X4 with the same pushrods.

GregWS6&z28

iTrader: (8)

people run the 7.425's mainly for valvetrain noise reduction. there is no improvement over running 7.400's. I would run what LG recommended and be done with it. this is what TSP told me. I also run 7.400 with my 232/234 .595. 598 113LSA cam

Cobra4B

iTrader: (9)

Thanks... I hear people saying that 7.4s are stock length, but apparently stock is more like 7.35x. So 7.4's are indeed longer to account for the smaller base circle on the cam.

GuitsBoy

iTrader: (4)

Stock is 7.380 (gauge length). Whats the cams base circle. I suspect its around 1.450 like most aftermarket cams. In which case the added preload will help quiet things down. im running the equivalent to 7.460 pushrods if I were on a 1.450 b/c cam and stock heads.

I say go for the 7.425 if you have the choice. If you already have the 7.400, its probably not worth changing them.

Cobra4B

iTrader: (9)

^ Allready have the 7.4's, they're sitting in the heads right now, rocker arms aren't installed yet.

I'll just go with it... no need to swap apparently.

sidewayz28

iTrader: (24)

im running 7.4s with a 232/234 .595/.598 and stock 243 heads with dual springs..

Cobra4B

iTrader: (9)

^ No abnormal ticking?

smask04C5

iTrader: (1)

7.400 and check valve stem wipe pattern

Cobra4B

iTrader: (9)

ttt... anyone else? I guess I'll stick w/ the 7.4's because I have them.

Sean Collins

get the lifter on the backside of the basecircle. Valve fully closed nose pointed 180 away from the roller tappet. Get a dial indicator. run the rocker down with a pushrod checker pushrod until it touchs with the bolt all the way tight no preload on lifter. go half turn on pushrod length checker line dotted then measure depth from zero ( you set it at zero preload) with dial indicator and subract your ideal preload from your pushrod measure. Usually a half a turn is 0.050 on a checker. if you decked the heads or the block has a variance of the camshaft has a different base circle becuase somebody changed grinders. You can get the ideal lifter preload for your application this way but pushrods are usally avialbe in 0.025 increments.