HELP!! LSx install in SBC chassis?

[BigAl1]

Well, based on my measurements tonight, and looking at the link for Energysuspensions, the "Short, Wide" mount on that page is the one to go with. This has the mount bolt hole to base surface height of 1 3/4". This will also fit the width of the chassis pad better, possibly eliminating grinding to clear the inner weld on the mount tabs.
See www.ultimagtr.ca/march_2006/index.html for the ongoing saga. All this effort is my own trial and error. I probably could save some hassle by asking some questions to the Factory who have always been helpful with my previous questions.

Allan

[BigAl1]

Well, more info to add. The Corvette alternator location interferes with the cooling system swirl pot. So back to mounting the alternator down low as the factory does for SBC. I'll have to decide if I want to design a custom bracket or use GM brackets and modify to align the belt path. Also will need another idler pulley where the stock Camaro PS pump would be.
The white GTR I have pics of actually has the alternator on a Corvette mount, but flipped up and over to be closer to CL of the engine. This puts the alternator pulley very close to the angled surface at the upper part of the firewall.

Allan

[crafty]

My new engine mounts will be here next week.

I have made new spacers for the AC but not sure if I am happy with it, I may go for the GTO alt (if it has the outlet/inlet on the side), or I will add some bracing to what I have done.

Photos next week after the engine mounts arrive.

[crafty]

Anyone who's going LS into an Ultima - here's the mounts you need!

http://store.summitracing.com/partdet

[ls2ultima]

Crafty
Have you tried them? How did they fit?

[crafty]

Like a






in a

[ls2ultima]

Thats good enough for me. Ordering tomorrow

[BigAl1]

Now that the engine is in mine, I tried the 2004 GTO exhaust manifolds I got as an experiment - they do not fit! Back to the online research, trying to find a down path header set that will fit LSx in the SBC chassis. Anybody have suggestions?

Allan

[crafty]

Not sure what manifolds are on mine, but they are std cast iron and fit perfectly. Gonna switch to headers later.

PM Jeff, maybe he knows.

GC

[chuntington101]

crafty i think yours are stock corvet heards mate!

has antone tried the cast iron truk manifolds?? they are a log design but flow pretty well!

thanks Chris.

[BigAl1]

Crafty,
Can you send pics to me showing your exhaust manifolds installed?

Thanks,
Allan

[mkoch1]

my 98 vett headers would not fit in my small block chassy. Maybe the newer ones would

mark

[crafty]

AL,

I just bought a new AC unit for a Monaro (GTO) on Ebay in Australia. This is has the fittings on the side as you say. It cost AUD395+110 shipping = AUD505... they have one more in stock.

http://cgi.ebay.com.au/ws/eBayISAPI.d

See how your unit is close to the engine mount.


If you put some spacers in there it will clear the mount. Put spacers between the block and the tensioner assembly and also between the tensioner assembly and the compressor. This will put the tensioner in the centre of the belt

[ezakimak]

Just as a thought, haven’t looked into it yet, but I seemed to remember that the LS series of engines were sold in some ski boats, you might be able to get some manifolds from this side of the market

I think Malibu were making them, Holden Special Vehicles (HSV) started licensing them and re- bagging them in Australia. At the time the boats actually had a higher power output than the HSV cars.

[chuntington101]

thats great info on the ski boats mate! any links or anything???

Chris.

PS i think the easiest solution would be to go for these log type manifolds!

www.schwartzperformance.com/alien.htm

simple and very effective if you know what i mean!

[BigAl1]

I'm going to put 1 3/4" spacers between the compressor and the mount bracket to clear the compressor away from the engine mount. The pic above is the wrong adapter plate, now I have the standard S&P style adapter plate. This requires the compressor mount bracket to be clearanced slightly - see www.ultimagtr.ca/april_2006/000895.html . The belt path is already aligned being the Corvette setup, but will need a longer belt.
These motor mount adapter plates put the axle line on my G50/03 trans about 3/4" ahead of the rear wheel CL. If I had used the other mount plate first pictured, the axles would have 1 3/4" of mis-alignment. Another plus to these mounts - www.ultimagtr.ca/march_2006/000872.html is the front water pump inlet has more clearance vs. the firewall - still tight, but can be done.

Allan

[steve_D]

BigAl1 said:

I'm going to put 1 3/4" spacers between the compressor and the mount bracket to clear the compressor away from the engine mount. ................

This will result in a rather long bolt which is not best engineering practice.
I would source some steel hexagon bar and make/have made the required length spacer with a turned male thread at one end and a tapped female thread in the other. You can then assemble the spacers to the block using loctite and mount the compressor to the spacers using normal bolts.

Steve

[crafty]

BigAl1 said:

I'm going to put 1 3/4" spacers between the compressor and the mount bracket to clear the compressor away from the engine mount.

Whatever specing you decide on you need to split in 1/2 and use 2 sets of spacers, one between block and tensioner and one between tensioner and AC compressor, otherwise your tensioner will be off-centre.

[crafty]

steve_D said:

BigAl1 said: I'm going to put 1 3/4" spacers between the compressor and the mount bracket to clear the compressor away from the engine mount. ................ This will result in a rather long bolt which is not best engineering practice. I would source some steel hexagon bar and make/have made the required length spacer with a turned male thread at one end and a tapped female thread in the other. You can then assemble the spacers to the block using loctite and mount the compressor to the spacers using normal bolts. Steve

I'd thought of doing the same, but with the spacers I have it seems to work fine with a long bolt. The spacers are only 3/4" so there's not enough room to use a threaded one