Fast 95 Z28

Hi, about to put my LQ4 408 together next week. Just need to know what clearance problems i may run into while assembly. I already know about the windage tray needed to be spaced. My main question is will i need to notch the bottom of the cylinders to clear the 6.125" rod 4" stroke? Or does this only apply to a 4.125" stroke? Anyways the rotating assembly is a TSP LQ4 408, 4.030" Wiesco -8cc pistons, Eagle 6.125" rods, and a callies compstar 4" stroke crank. I'm planning on revving to a 7000rpm redline. Can't wait to feel the power with those LS3 heads!

Thanks.

5 Liter Eater

iTrader: (5)

I am just putting mine together and it didn't require clearancing the block or the #8 piston to clear the reluctor. Just had to space out the windage tray but I hear that is going to require clearancing the ribs in the LS2 pan. Will find out tonight. I have all the same components as you except for a SCAT crank.

Fast 95 Z28

Thanks for the reply 5 Liter Eater. Can anyone else confirm this as well? Thanks

wws699

iTrader: (3)

Had to clearance the LS1 pan on mine

5 Liter Eater

iTrader: (5)

I did my pan tonight. This is an LS2 pan. I had to clearance the ribs by ~1/4" to get the pan to sit on the block without a gasket (so that when the gasket is in place there is extra clearance). No biggie, used a 4" cut off wheel with a metal disk on it that made pretty quick work of it. Took 3 passes to get it right and after each pass I had to thouroughly clean the pan so as not to get any aluminum dust in the motor which is up-side-down on the engine stand.




The bigger problem is that I've bent the pickup as far as it will go, its up against the windage tray, and the pickup is basically sitting on the bottom of the pan... I don't see another way around it other than to cut and re-weld the pickup...

mark21742

A good way to find any spots where you are hitting is a dabb or two of dark grease on the parts in question....put the pan up in place, pull ot back down and grind the spots that now have the grease stuck to them.

When I did my 408 stroker in my GTO I would have had to grind deep into the pan and have thin spots so I elected to run without the windage tray.... Been running it like this for the past year and have had no problems.

5 Liter Eater

iTrader: (5)

I'm debating doing that because my pickup is on the floor of the pan now and it is going to take some fairly major modding of it to get it back where it needs to be. The tray doesn't seem like it's doing that much to me.

mark21742

In my GTO pan there is a baffle that bolts in over the dyno in the pan...I did leave that....the main baffle is gone, I beat on nine daily, sometimes hitting over 8,000 rpms and have need had an oil problem did to nor having the baffle in there

mark21742

By the way 5 liter eater, that Corvette is sexy as hell!

5 Liter Eater

iTrader: (5)

Thanks man. It'll be sexier once the 408 and TT are in and it's running again. Should make some jam.

mark21742

TT is my final goal in the gto, but thats looking years down the road lol

5 Liter Eater

iTrader: (5)

Well I'm finally closing in on my end goal (TT stroker). After upgrading the fuel system again I don't see what else I can do except for something like an LSX/ERL/RHS and six bolt heads and I just don't see me doing that.