which LS3 to go with?

[Vega$69]

Originally Posted by jwcarguy

"Texas Speed has a cam that adds 104 HP to an otherwise factory LS3"
Where is that listed??

X2. Where is that TS cam?

The GM Hot Cam (525) is 95 HP over the stock 430 LS3. I liked the way it sounded and the performance was great. No surging or any other issues.

So where to you get the "sacrifice" on the GM 525 crate motor?

Torque at over 400#s at 3000 rpm and almost 500#s at 4500 rpm

BFG Rival S 335/18s with 3.70 gears and a T56 Magnum would spin the tires all the way deep into 3rd

[dhutton]

Originally Posted by Vega$69

X2. Where is that TS cam?

The GM Hot Cam (525) is 95 HP over the stock 430 LS3. I liked the way it sounded and the performance was great. No surging or any other issues.

So where to you get the "sacrifice" on the GM 525 crate motor?

Torque at over 400#s at 3000 rpm and almost 500#s at 4500 rpm

BFG Rival S 335/18s with 3.70 gears and a T56 Magnum would spin the tires all the way deep into 3rd

I think the Hot Cam is in the 480 hp. The 525 hp version uses the ASA cam. Interesting thing is the 480 hp version has more torque and hp up to 4500 rpm in the curves I saw. Depending on how you drive the 480 hp MAY be a better choice.

Don

[abadsvt]

I was just looking to compare my motor to the 525hp ls3 crate. I ordered mine from SMC Performance and here are the specs they list. Its a 515hp ls3 crate. I didn't see many specs online for the 525 besides saying it has the ASA camshaft.

Engine Build Specs. Upgrades marked in red

10:7 to 1 static compression
New GM LS3 Aluminum Block
New GM LS3 Aluminum Heads, Dual Patriot Performance valve springs with titanium retainers
GM flat top pistons, with GM ring pack
New GM Performance coated main and rod bearings
New GM LS3 rods with ARP rod bolts
New GM LS3 nodular iron crankshaft (58X)
New GM high volume oil pump
New GM LS3 1.7 rocker arms
New custom ground Competition Cams camshaft. SMC Stage 2 with good idle and driveability
New GM LS7 hydraulic roller lifter
GM head bolts
5/16" Chromoly push rods
New GM LS3 C6 Corvette wet sump oil pan
New GM intake manifold assembly 42 LB. injectors
New GM LS3 Ignition coils and wires
New GM gaskets and seals

Are most of these upgrades the same as the 525hp build? Im not a motor guy and went with this setup from talking with SMC. Thanks

[Vega$69]

Originally Posted by dhutton

I think the Hot Cam is in the 480 hp. The 525 hp version uses the ASA cam. Interesting thing is the 480 hp version has more torque and hp up to 4500 rpm in the curves I saw. Depending on how you drive the 480 hp MAY be a better choice.

Don

Yes you are correct on the cams

Here are the dyno sheets for both comparison. The torque for the 525 is higher across the curve

I also installed a 480 in a friends 69 and he loves it. If you look at the dyno sheets it appears the 480 dynoed closer to 500 hp at 6000 rpm and I believe I'm now seeing it marketed as Chevrolet Performance LS376/480 LS3 6.2L 495HP Engine

http://www.jegs.com/i/Chevrolet-Perf...01358/10002/-1

[dhutton]

Originally Posted by Vega$69

Yes you are correct on the cams

Here are the dyno sheets for both comparison. The torque for the 525 is higher across the curve

I also installed a 480 in a friends 69 and he loves it. If you look at the dyno sheets it appears the 480 dynoed closer to 500 hp at 6000 rpm and I believe I'm now seeing it marketed as Chevrolet Performance LS376/480 LS3 6.2L 495HP Engine

http://www.jegs.com/i/Chevrolet-Perf...01358/10002/-1

Different curves with different result here:

http://www.pro-touring.com/threads/1...ight-LS3-crate

I'm going to guess the 480 produces more torque down at 2000 rpm....

Don

[Vega$69]

Originally Posted by dhutton

Different curves with different result here:

http://www.pro-touring.com/threads/1...ight-LS3-crate

I'm going to guess the 480 produces more torque down at 2000 rpm....

Don

maybe so at the lower rpm.

I see guys suggesting the 430 and cam swaps.

If you swap the cam you'll have to custom tune which will add to the cost.

Secondly and more important IMO is you will lose the warranty on the engine. For some that's not a big deal. However if you have any thoughts of selling the car having the GM Performance warranty is nice to have.

My buddy is extremely happy with the 480 I put in his car almost 3 years ago. Never an issue.

I really like the 525 for the extra $1000. For me it's was perfect and I would go that way again. It drove perfect and the sound is different then the 480.

That said you can't go wrong with any of the LS3 crate motors.

[randy]

don't mind the slight belt squeak.

Here is a video from tonight testing out the car. I still need to fine tune the car but for now the car runs great with the supplied tune.

https://www.facebook.com/photo.php?v=10100926957546926

[cjsgarage]

Originally Posted by randy

don't mind the slight belt squeak.

Here is a video from tonight testing out the car. I still need to fine tune the car but for now the car runs great with the supplied tune.

https://www.facebook.com/photo.php?v=10100926957546926

your caption for the video says you don't think the rpm gauge is working. The LS puts out a 4 cyl pulse. Not sure if you're alreayd over that hump. But I thought it might help

[cjsgarage]

apparently Texas Speed has redone their website. The former version of the site listed their stage 4 as having gained 104 hp.

I also noticed their cams are now ground in house. I personally have stopped shopping from them. Their house crank went out of spec in less than 30 seconds of partial low oil pressure due to poor hardening process and their house rods were out of of round even when they supplied the ARP hardware installed.