LS motors clearance issues...

[boxhead]

With the Classic Revivals you need to fit a spacer to gain clearance between the rack and the harmonic balancer, Could this help you?

Also depending on location of your crossmembers (or if you can move them) I think the corvette sump is a fair amount shallower.

[stiffy]

Shipps,


I have the same problem with the Coupe....

I found a way to fix it......... LS7 dry sump Bolts straight in .......

Too bad the dollar has gone south.........

I thought about the LS7 until I drove the 6 liter the other week...No Tune, standard heads & cam and asthmatic exhaust... I dont need one

Doug Pearce was thinking about a plate from the front cross member to protect the sump and filter!!!! Speaking of filters they are so small....


STIFFY

[Rebel1]

Mick, this is a difficult question to answer as it is an exercise in compromises.

The placement of the engine should be defined by it's relationship to the diff pinion and this is compounded by the very short wheelbase of the cobra.

It is recommended there be at least 1° and a maximum of 3° angle on a universal in both planes and no more than 1° difference between both uni's. These limits guarantee a vibration free install.

Here are two sites illustrating the concept:

http://www.clubfte.com/users/jniolon...nephasing.html

and ...

http://www.drivetrain.com/driveline_angle_problem.html

The compromise comes about because our tail/drive shafts are roughly 300mm long between the trunnions of the universals so doesn't give us a lot of freedom with regards to engine placement. It is also compounded by the offset of the pinion to (usually) the right hand side of the car by some 30 - 40mm.

This whole exercise is worth doing to see what limits you have and what extent of shims can be used as mentioned by others to provide the clearance.

Once you identify the theoretical placement of the engine then you can make a decision about the sump. Maybe cutting and welding the sump to improve clearance and capacity is a better option.

see here for an example of an LS1 sump being modified.: http://www.ls1.com.au/forum/showthre...t=cutting+sump

cheers

[Aussie Mike]

The LS2 Corvette wet sump is the best clearance you are going to get without going for the dry sump.

I picked one up a while aback and the bottom of the sump is flush with the bottom of the bellhousing. The Camaro/Firebird sump is close but it slopes down towards the front of the reservoir because the motor sits up on a bit of an angle. The Vette sump is flat because the engine sits level.

The Corvette sump also has some really good baffles and a full length windage tray/crank scraper.

I'll see if I can find a pic.

Cheers

[Aussie Mike]

OK, Here's some useful data.

This is the Commodore sump with it's reservoir at the front. You can see it hangs down nearly an inch below the bellhousing flange.



This is the Camaro/Firebird sump. It has a rear reservoir but it also hangs nearly an inch below the bellhousing flange.



You can se it here with my box bolted to the motor.




This is the LS2 Corvette sump. The LS1 Corvette sump has wings on the side and presents it's own clearance problems in some cars. As you can see the bottom is flat and flush with the bellhousing flange. This sump should gain you nearly an inch of clearance over the others.

[sambo]

Originally Posted by Aussie Mike

Mike is that an oil catch can return line feeding back into the block near the oil filter?

I spoke to Eagle Auto Spares and they're selling the Firebird/Camaro sump kit complete with pickup, screen, deflector, dipstick and tube for $686.20. These are new items.

[Aussie Mike]

That line is for my mechanical oil pressure guage. I went with all mechanical guages in my car. I like the full 270 degree sweep they have on their dials and I feel they are more accurate than most electrical guages.

You see LS1 sumps come up on Ebay from time to time. You may also try sourcing the sump from a suplier out of the US.

Cheers