sb2 LT1

[Craig 94 TA GT]

I never knew someone did it, but apparently someone has put a Nascar SB2 top end on their LT1!

Here's the link:
http://web.camaross.com/forums/showthread.php?t=369194

I'm not exactly sure, but it seems like he got his top end from Petty Enterprises. Here is the flow #s on the heads:
.100 87 69
.200 162 110
.300 237 146
.400 292 190
.500 325 225
.600 351 240
.700 372 250
.800 379 262
And I've seen that Joe Gibbs racing heads flow over 400 at .800

As far as dyno #s, I believe he mentioned that it produced over 400 ft-lbs at 3000 RPMs and was an amazing torque curve which peaked at 520 ft-lbs. I'll have to find the link for that. Not bad considering it's all N/A and under 400 cubes.

[Disifer]

that thing is huge

Do you know if it fits under the hood?

[Injuneer]

Note that the work was done by Second Street Speed.... home of George Baxter's 1,325HP 30th SS convertible, and my lowly 800HP 381. The SB2 setup should produce a real monster.

Here's a more recent thread:

http://web.camaross.com/forums/showthread.php?t=375560

Preliminary numbers are in. On a soft tune it made 705hp @ 7300 and 520lb/ft @ 5200 That's with 20/50W oil and 116 race gas through mufflers. Vacuum pump was pulling a little under 9". There's probably 30-40 left on the table as it sits. Merge collectors would increase that by a good amount. I may experiment with them. Right now it has straight 4" collectors. We are going to save the final tune for the chassis dyno. I also believe the smallish bore is going to hold this back a little so I'll be able to get the 750 I wanted when it's all said and done.

To say that I'm happy is an understatement. The motor made 400lb/ft @ 3000 and made peak torque @ 5200 but it carried that number all the way to 7300. That's unheard of. My engine guy said it's the flatest tq curve he's ever seen.

It should be good for 9.90's on the motor and then there's that 300 hit of spray

[Craig 94 TA GT]

Wow, that is very, very impressive
Fred, I don't know if I missed it, but how did he bolt those heads on the LT1 block? Did the race shop do extensive work on the heads or block to do this?

[Injuneer]

The heads were converted to reverse cooling. I'm not sure who did the converison. I thinkk Second Street just assembled the parts.

[Craig 94 TA GT]

Thanks for the info Fred. I don't know how much it all costed and how much work he put into it, but it has to be one of the "coolest" LT1s, regardless. I can't wait to see his track results, especially after the N20