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1965 Skylark LQ9 Retrofit / Swap - Build Thread

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Old 01-21-2014, 03:45 PM
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Originally Posted by 1989GTA
L92 with TSP VVT3 camshaft. LS3 intake manifold and LS3 throttle body. 1 3/4" to 1 7/8" headers with a 3" merge collector. 3" Pypes x-pipe and TA 3" exhaust. Ported heads and throttle body. 6L80 transmission with a Yank SS3200 converter. 3.23 gears with Eaton positraction. The 6L80 has something like a 4.05:1 first gear.
I am curious to see how that runs. It will be like a better looking 2012 Camaro


Originally Posted by 1989GTA
Before I forget what extensions did you use?
T/A sells extensions for the 64-67s, but I did not use those. I just made some out of some 3" stainless.
Old 01-21-2014, 08:04 PM
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"I am curious to see how that runs. It will be like a better looking 2012 Camaro"

That is exactly what the drivetrain is like.

I am looking into a resonator to fit right before the rear bumper. The Vibrant #1142 is the 3" version and looks like it would fit. It gets pretty good reviews. Being of a straight through design it should not cost me any power.
Old 01-21-2014, 08:16 PM
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Nice project! Who tuned your ECU?
Old 01-22-2014, 06:33 AM
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Originally Posted by 1989GTA

I am looking into a resonator to fit right before the rear bumper. The Vibrant #1142 is the 3" version and looks like it would fit. It gets pretty good reviews. Being of a straight through design it should not cost me any power.
I considered that at one point. The only penalty there is weight.
Old 02-02-2014, 01:49 PM
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Do you have a good picture of your engine compartment? I was scanning through your thread but could not come up with one. Just looking of ways/brainstorming to do a cold air intake on your car. The Smokey unit looks promising but there might be other solutions.
Old 02-02-2014, 03:55 PM
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Originally Posted by 1989GTA
Do you have a good picture of your engine compartment? I was scanning through your thread but could not come up with one. Just looking of ways/brainstorming to do a cold air intake on your car. The Smokey unit looks promising but there might be other solutions.
Here is one from when the car was first built. The only major difference is the area above the right valve cover on the firewall is now occupied by Nitrous solenoids.



There are a lot more pictures of the car hosted here:
http://www.streetfire.net/profile/speedtigger.htm
Old 02-02-2014, 05:48 PM
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Couple of thoughts.

From the picture it appears that on drivers side at the left front fender area might be a posible cold air pickup point. You would have to run some duct/tube over there in order to pick it up. In fact you could put a large cone air filter in that area and that might make things a little easier and shield filter from the engine compartment. Then the question would be what would be the best method for something at the carb that would allow the tubing to come off it and not have any restriction?

Of course the cowl on the hood opens up a lot of posibilities. A lot of people say the cowl opening facing the windshield is best. My buddies 68 Chevelle is that way. When the hood is closed it is sealed to a box around the carb. He is pulling down around 750hp at the motor and it is not a restriction.
Old 02-08-2014, 06:57 PM
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So after coming up a scant .07 short of hitting ten seconds without using nitrous, I decided to get back to work on my gas tank mod.

Check out the progress. Just have to tig it up now:

















Old 02-08-2014, 07:39 PM
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That should do the trick. At 6 pounds per gallon that can add up pretty quick. On another note your traction could suffer.
Old 02-09-2014, 08:02 PM
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Here is a shot of the final test fit in the car:

Old 02-09-2014, 08:37 PM
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Looks good that way. Plenty of clearance. If you need more traction in the rear you can always relocate the battery.
Old 02-10-2014, 03:20 AM
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Excellent craftsmanship! Did you fab up the sump? That sure is a slick car, even the gas tank is polished!
Old 02-10-2014, 05:53 AM
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Originally Posted by tsnow678
Excellent craftsmanship! Did you fab up the sump? That sure is a slick car, even the gas tank is polished!
Thanx Tony. Yes, I designed it and built it. I did have to go over to a friends shop to use the foot shear and pan and break though as I don't have that equipment.
Old 02-10-2014, 10:24 PM
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I notice the stall is up some 1200 rpms or so ???/ Looks to have knocked about 3 tenths off after the cam change cut .25 et or there abouts ???? Now you're down to looking for another tenth to get the magic 10 second motor pass on a totally streetable 6 liter combo....preety cool....
Old 02-11-2014, 01:30 PM
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Originally Posted by A.R. Shale Targa
I notice the stall is up some 1200 rpms or so ???/ Looks to have knocked about 3 tenths off after the cam change cut .25 et or there abouts ???? Now you're down to looking for another tenth to get the magic 10 second motor pass on a totally streetable 6 liter combo....preety cool....
Yes, I increased the stall to about 3700. It was good for exactly 2 tenths at the expense of a little drivability. .25 would be over-estimating the cam swap by quite a bit. The cam swap was worth about 1 tenth and about 1.5 MPH. Porting the intake was good for a little less than 1 tenth and 1 MPH. The rest of the gain from my maiden voyage was just the difference between the summer heat and cold winter air.

Also, I got the tank is all welded up thanx to Paul over at Tarpon Stainless and Laser Cutting. I am so missing having my own TIG welder. My MIG is okay, but TIG is the shizzy!

Old 02-11-2014, 02:57 PM
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"Yes, I increased the stall to about 3700"

What was your old stall rated at? I like what you did to the gas tank by adding in a sub-tank on the bottom with baffleing. I might do something like that to mine down the road. However I will keep my Tanks Inc internal pump. It adds capacity and looks like it will solve the fuel tank starvation problems both in cornering and under high acceleration.

Last edited by 1989GTA; 02-11-2014 at 03:04 PM.
Old 02-11-2014, 05:30 PM
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Originally Posted by 1989gta
what was your old stall rated at?
2800-3000
Old 02-11-2014, 06:23 PM
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That tank looks great! I wish I knew how to TIG and had the machine here to play with. I am not too sure my hand is that steady though. It is hard to hold the tank, the TIG torch, the filler and a beer all at the same time. Again, great job not only on the finished product but the engineering that went into it.
Old 02-11-2014, 09:31 PM
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Originally Posted by tsnow678
That tank looks great! I wish I knew how to TIG and had the machine here to play with. I am not too sure my hand is that steady though. It is hard to hold the tank, the TIG torch, the filler and a beer all at the same time. Again, great job not only on the finished product but the engineering that went into it.
Thanx Tony. Coming from somebody with your fabrication skills, that is a high compliment.
Old 02-13-2014, 11:57 PM
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Road tested the tank tonight. Not so much as a drop or a damp spot on the welded areas or any of the new -10 AN fittings. I was also able to drive the car into town with less than 2 gallons in the tank with no problem. I now have exactly 5 gallons in the car. I ran it through the gears and it feels good. Before the tank mod, that would have resulted in a fuel starved, nose over. I will test it with the fuel pressure gauge tomorrow after work, but I feel confident. I am very pleased with this project.


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