What am I missing? Any input is fantastic. Car has a coan racing th400.

03 Lq4
stock rods/pistons
ARP rod bolts
GMPP L92 carb intake
L92 Heads
Rocker arms, intake, 8
Rocker arms, exhaust, 8
Rocker support stand, 8
Rocker-arm bolts, 8
Valvesprings, kit, LS6 (16)
Fel-Pro LQ4 head gaskets
Fel-Pro intake gaskets, L92
Comp Cams XR281HR
STOCK lq4 hyd roller lifters (are these good enough?)
850 cfm carb, (unsure as to which to run)
GMPP muscle car LS swap pan
Holley LS swap motor mount brackets
GMPP crankshaft spacer
MSD 6010
Flexplate??? (which one do I need)
Headers, unsure which brand yet

I've read that all I need to mate the trans is a hub pilot adapter and some metric bellhousing bolts.

Shooting for a reliable 11 sec car with the 3.42's that I can drive anywhere. This is a budget oriented build so I can't get crazy. I'm hoping this makes 500ish hp.

Thanks


and a pic of the old motor that came out today

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If it were me, I would:
Get better valve springs like some PAC 1518s

That cam is designed on a 110 intake centerline. I would advance it 2 to 3 degrees to 107 to 108 intake centerline.

I don't have a Camaro so the oil pan may be fine, but I have heard many complaints from the A-body guys that pan hangs down too low and is an accident waiting to happen. I have the Mast pan and it is pretty good. A lot of guys have the AutoKraft pan and like it.

Get some good hardened pushrods. The stockers have a reputation for bending.

How much stall in the torque converter?

 

I used a tci flywheel on my build n it came with the hub adapter. As far as headers several vendors offer them. Hooker super comp is what we used on the last camaro I built. Good luck with ur build!!

 

Ok sweet, if it comes with one that is fantastic. I was looking at those exact headers too, they don't give those babies away. I actually took alot of that info from a car craft motor build so the cam/valve springs etc are based off of what they used. I'm clueless with LS motors and am trying to find the "ideal" combo to use. I know a few people with that pan in a Camaro and they have no issues to report. I'm totally unsure of stall, I went out earlier to run the numbers off of it and there is absolutely nothing that I can see. I bought the car with that trans and converter already there so that will need to be addressed.

 

As long as it is between 3,000 and 4,000 it will work. You may consider using a 750 Holley HP or 950 Holley HP carburetor. The Quick Fuel brand carbs are excellent too. I am not a fan of the 850 Holley on small motors. It has larger venturi bores and can be weak and fussy at low RPM on a smaller motor.

 

I'm gonna pull it off to see what it is, hopefully it can be reused. I've heard alot of good about the holley. I have a race demon 750 sitting on the shelf off of the old SBC but I've never had much success with it. The old 385 with AFR's went a best of 12.48 @108 so i'm assuming this combo will blow that away.

Going to be using this flexplate
http://www.summitracing.com/parts/tci-399753

Do I need this too?
http://www.jegs.com/i/GM-Performance...oductId=835483

 

That oil pan you mentioned is super deep.
8" or better if I remember correctly.
I would seriously do some research before you dump the $$ and purchase something that isn't going to work, I know it's not an expensive pan and a better fitting one is probably going to run an exta Benjamin but it's worth it.

ETA: that link to the flex plate.... here is the fine print in the "notes" section:

Notes:Will not fit 4L80 transmissions. Includes crankshaft bolts and crankshaft hub adapter for use when installing an early, non-LS transmission.

You might not need that adaptor you linked.... looks like it's included with the flext plate... but a quick call to them will clear it up.

 

I went with autokraft oil pan and it fit perfect and does not hang low at all. Also, I used carshop 1 inch set back plates. It puts engine in sbc location so you don't have to move or modify your tranny xmember. I used solid engine mounts in conjuction with those plates. You can use the stock flexplate with your setup. Just use a hughes ls1 hub spacer. I went with the dynatech headers with the 1 7/8 primaries coated, they were only like $420. They fit excellent as well. If you need pics I can email u some...gl

 

I'll be shooting a pm your way when I'm home from work

 

Roger..

 

I would mill the heads a little to get the compression up, it will help that cam work alot better. As far as that 850 holley thats what i run and never had a problem.

 

Popped my old torque converter off last night. It was always a mystery to me as to what it is so I emailed coan racing lastnight with all the numbers.

"Hi Mike, The converter was built in 2001. It is our COA-20328 10" hi performance race converter. Sold new for $665.00. It was discontinued due to a lack of core availability. It is fully furnace brazed, anti balloon plates, 3 set of bearings, billet turbine hub, trans brake and NOS compatibile. Rated at 4-4500 stall and 5-600 hp big block. Hope this helps".

Cant say enough good about that company


My room mate manages a salvage yard so I have an endless array of parts to choose from. Got a 5.3 flexplate and i'm going to use the 6.0 crank spacer. Going to index the plate and have the correct pattern drilled. Still trying to sell my SBC shortblock so I can get the LS here........

 

I got the L92 heads from I think it was Pace with the springs I needed ready to bolt on for about $1000 NEW.
Also got my gasket kit there, along with lifters,lifter boxes,new rings (Childs and Akely),cam gear/chain kit,TCI flex plate,and a few other small things
SK-Speed hooked me up with Dynatech headers,Holley oil pan,MSD box,VicJr.intake,and some other stuff....cheaper than Summit or Jegs even with shipping....and FAST too

These are both sponsors here and treated me right.

The LQ4 I used was rebuilt to stock specs with ARP rod bolts and fly-cut pistons. Heads were shaved .050, an aftermarket cam with more lift/dur/on 110 LSA... so shorter push rods were needed.

http://www.skspeed.com/ <--ask for Mike F.

http://paceperformance.com/ <--ask for Beau <sp?>

Holley pan is about even with crossmember....


Dynatech headers,LS3 heads,LQ4.....

 

Hey thank you a bunch! I really appreciate how easy people are making this for me, now if I could only sell my old stuff so I could get the ball rolling.............. How fast has the car gone with the Lq4? I ran 12.48 with the 385.

 

I went 11.79 short shifting and oiled track on 1st pass

Make damn sure you have great venting as I learned....oil blew out dip stick, hit underside of hood, dripped down motor, and headers getting under rear tires.....not fun at all.

I need to get back out...but now hunting season is here in 17 days Got a 10 pointer with my name on him.

 

Mine went 11.39@120 with a similar setup to Doug's except a 5 speed. Then, later 10.79@130 with 11:1 and a radical cam, and now 10.03 on 10 psi with more boost to come as I get braver, lol.... Too much fun

 

I would think about going with a different cam, and possibly a bigger carb. That comp cam is a sweet cam, but its more of a cathedral port cam. I would think about getting a custom grind for the l92 heads, and maybe a 950 carb. The 850 will still run sweet, but you will be leaving some power on the table.

 

The 850 Holley carbs are actually a bigger carb than the 950 HP series (Marketing BS). You would likely not see more than 5 hp difference, if that, between a Holley 750HP, Holley 850 or the Holley 950 HP on that motor. The only 4150 style carbs that are actually larger than the 850 Holley is the 950 Ultra or the 1000 CFM models.

 

Interesting!

 

Sorry I've been busy, sold my shortblock and my heads sold lastnight on ebay.


What cam would you suggest? I'm interested in going quicker than. mid 11's if possible

and............



$100 complete


It's like a yellowbullet reunion in this thread, lol