Hmmmm. I think we need to compare prices. 408ci or 422ci Iron Block price compared to a 422 or 427ci Alum block price. To drop weight off the nose to remove the close to 100lbs added to the nose I would think the removal of the front bumper support, k-member, lighter battery and possibly more under hood stuff we might not need. Let's assume you have paid 600 bucks total in weight reduction mods. I know you can do more, but I think that is close to 70lbs of weight reduction right there. Can I get some shortblock #'s here?

 

This is how I se it:

Assume exchange on stock aluminum block
Purchase 6.0 new $ 600
Add K-frame to get to 100lb drop installed and aligned $ 1000
Other weight reduction (earlier post) $ 600
Machine 6.0 block with main studs $ 700
TOTAL $ 2900

Fully machined re-sleeved block on exchange with main studs (ready for assembly) Full retail $ 2250
On discount $ 2000

I crunched the numbers before and it works out depending on what you already have.

 

What's the difference between a K-member and a K-frame and what does the K-frame include? I have never heard of a K-frame at all and if it drops 100lbs wow! Please link us to a K-frame for the f-body..

 

My Formula weighed in at 3160 with a 6.0L block in it and stock k-member.

I can build a 408 with iron block and do all the work myself (except machining) for under $3500.

OBTW, the reason I can build it myself is because Nick taught me a lot over the phone

 

Do you have an interior? Pic's please..

 

I ended up doing:

GWP 422
4.030 Bore
4.125 Stroke
9.5:1 Static Compression?

I never tuned it NA.

It is a TORQUE MONSTER! I need to free my exhaust up some and I just added boost, to get more RWHP out of it. Race on the street? Unless Ihave ET Streets on, I don't even bother.

 

"549 RWHP / 757 RWTQ"

I would say you have a TORQUE MONSTER. You could probably pull a 40 ft boat with ease.

 

Sorry Vince, the K-frame is the same as the K-member. It drops another 45lbs off added to I think your estimated already 70(earlier post) and will be just over the 100lb mark combined; I wasn't very clear.

Hey Todd, long time! You can come down and put some 408's together for us anytime

 

My final dyno numbers and combo were:

475rwhp
505rwtq
-converter locked
-ARE 422ci
-4.060 bore
-4.075 stroke (offset ground used Lunati 4.000)
-Ross Pistons
-244/244//112 Comp cam also called S1 cam
-LS6 heads, big valves, ~315cfm on the intake
-25 degrees of timing
-3" dual exhaust with mufflers

If I were to do another big inch motor, I would probably go bigger on the cam and I would go with more overlap to help the idle quality... so I'd kick around doing like a 244/250//114-115 LSA and I would keep the lift in the .600-.610 range...

I'm guessing that a M6 car can hit 525rwhp with a big cube iron block.

 

Who's "US" Nick? You back at ARE? What is your status? Wanna hire me? I'm getting ready to leave the USAF Good to see you around and hope all is well with you.

 

Vince, here you go:

http://www.cofba.org/users/reckless/retro54.jpg
http://www.cofba.org/users/reckless/retro55.jpg
http://www.cofba.org/users/reckless/retro56.jpg

 

Thanks Nick. Something to think about.

 

Yes I am back with ARE Status kinda confidential send over a resume

I agree with John on his combo, more cam with the "good" lobes and 500 easy through the auto

 

Thanks Todd. It's not as empty as I thought.

 

NICK,

Welcome back to ARE & great to see you active again here in the LS1 world!!!!

Best of luck with your new endeavors!!!

 

bump, keep the info coming.

 

Holy old thread Batman!

 

I got attaracked by this combination. When installaing the 4.25 stroke, was it easy