BDR

So I bought another 3rd gen..a 91 RS thats backhalved, cage etc etc. I figured I'd do the low budget thing so I bought a 2004 LQ4 out of a pickup + TH350 + s480 turbo to see what it does just like that.

My questions:

Since I'm going to do a carb'd setup, I know I need a victor jr and a MSD 6010. What part of the harness needs to be saved?

I'm ONLY going to run a water pump and alternator. Is there a cheap bracket made for this already or should I just keep the truck alt bracket (I have a 4" cowl hood so fitment isnt an issue I think).

On the TH350, since I have an '04 LQ4, I'm guessing I dont need an adapter? Do I need anything to bolt up my convertor to the flexplate?

I have no mounts on my k-member so if I buy the mounts from Hawks Third Gen (who never answer emails), with solid motor mounts, does it place the LQ4 in the same spot a old SBC sits? I'm asking because I want to know if my trans will move back or forward a few inches or if it will sit in the exact same spot.

On the turbo stuff.. I wanted to use the truck manifolds, mine sweep back and not down, since I cant... do any of these fit or think they would:

http://tinyurl.com/q5qolpd

or

http://tinyurl.com/no8ezot

gbeaird

iTrader: (1)

We're putting a LS1/TH350 into our 85 Firebird. We're running an old Spohn TH350 transmission crossmember and torque arm. It's what we had with the SBC/TH350 before, so we're reusing it. The TH350 doesn't move, and we used Dirty Dingo billet aluminum motor mount adapters (DD-LS-DOUBLE-D
IIRC), bolting our solid SBC engine mounts to them. The engine and transmission dropped right in and bolted right up with no problems.

For the transmission-to-engine mounting, you'll need a LS-to-TH*-specific flexplate. We're using a TCI flexplate: TCI-399753. It comes with a spacer that sets in the center of the flexplate and holds the '****' on the converter in place. In the description I read, I was lead to believe that the flexplate doesn't come with crankshaft mounting bolts, but it does. I did order some ARP bolts, and used those, but the flexplate does have crankshaft mounting bolts.

When bolting the transmission to the engine, there's one bolt on the passenger side you won't use, and the bolt holes in the oil pan will go unused, but that's okay, just use all that you can. Oh, and if you're replacing a SBC with that LQ, the bolts won't work. The LQ4 will require a metric thread bolt (8mmX1.5 thread, I believe).

BDR

so then I just need those brackets on my kmember and then old school SBC solid mounts that go to the block?

I thought I didnt need the spacer since my engine is an '04. Thought only '99-'00 engines needed that?


Here is my flexplate, it had a 4l80e 4x4 trans bolted to it. Im assuming the spacer is there?

Pocket

iTrader: (24)

Id recommend a DIY venture on the hot side stuff

BDR

Pocket:

thanks for the clarification.

On the harness, I'm only going to use Autometer gauges, not factory gauges that come with a Camaro. So I only need oil pressure, water temp, volts, etc. Does that simplify how much of the LS1 harness I actually need for use with a MSD 6010 ?

On the flexplate, do I need to buy one that lets me bolt the TH350 convertor to it?

I'll look up the truck manifold welding..I saw a thread on it. Thanks again!

Pocket

iTrader: (24)

You dont need any of the LSx harness for a carb conversion, only the 3rd gen half cut down

For the new gauges, Id reuse the factory wires passing through the firewall to save from extra holes. If you're dumping the dash and as much wiring as possible, Id build a simple switch board and remove all the OEM wiring

gbeaird

iTrader: (1)

The Dirty Dingo brackets bolt to the block. Then the engine side of the Moroso solid motor mounts bolt to the DD plate. That's the configuration we're using.

I am not sure about your 4L60E flywheel. It may work. We had nothing to start with. The back of the crankshaft on our LS1 looked similar, but w/o some measurements, I have no clue if you can get away w/o an adapter. The shape was similar, but the ID of the crankshaft end is a bigger diameter than the snout on the converter. That's why you need the adapter. That, and our new flywheel mounted the converter so it sat back from the crankshaft a bit, so the adapter is necessary to make up that space.

Pocket

iTrader: (24)

The 80 flex plate can be used with older 60's, not the LSx version. Bear in mind it's a 6 bolt vs the 60's 3 bolt

BDR

I bought these from DD:

http://dirtydingo.com/store/product_...oducts_id=1322

So basically I just need the frame mounts and thats it, I'm assuming.


gbeaird:
Mine has the adapter already. As far as my flexplate, all I need to do is round out the holes for the converter bolts and I should be good to go.

gbeaird

iTrader: (1)

Those may work. Here's what I used with Moroso solid motor mounts:

http://dirtydingo.com/store/index.ph...=1_206_305_335

and these motor mounts:

http://www.summitracing.com/parts/mo...s/model/camaro

Good to know you're set for the flywheel. Those things aren't cheap!

BDR

I'm assuming that with the stuff I bought that bolts to my LQ4 block, all I need is the stock k-member motor mount...right?

gbeaird

iTrader: (1)

That's what we used. I would assume the LQ4 is similar to the LS1, but do not know for certain. Hopefully others with better knowledge of the LQ4 specifics can post up.

Pocket

iTrader: (24)

Those are for a SBC, so you will have to use the stock SBC clamshells with an adapter plate bolted to the block. Use the 1" setback plates for a stock position

Like these. You can build your own set easily. The bottom bolt for the SBC clamshell lines up with a LSx, move it back 1"
http://www.ebay.com/itm/LS1-Conversi...-/281162117619

Externally, LS1 vs truck blocks are nearly identical. Any mount that fits one will fit the other

BDR

why would I need setback plates if my motor mounts are adjustable?? You're probably replying to gbeaird instead of me, I think.

At any rate, with what I have + the ugly *** clam shells, I think it should work.

gbeaird

iTrader: (1)

I actually got a set like that, made from 1/4" steel, just like those. I opted for the DD units as they were aluminum. I'm at weight per our class rules, so want to save as much off the front as possible. The nice thing about those, as well as the DD plates is it'll drop the engine/trans back in the same orientation you had with your previous engine/trans combination. That's a huge plus if you're reusing your transmission (no need to rebuild or replace the trans crossmember unless you have to because of exhaust routing ) which was also important, because the class rules we run under do not allow for much engine relocation (1/4")

But yeah, BDR's adapters will work perfectly for his needs.