And Penny just keeps on changing...

[Vegas69]

I was considering doing an undersquare engine as well. I have a bore size of 4.280. My block will take a 4.375 stroke. Ultimately my engine builder didn't feel it was a good trade off in power vs. cost and longevity. I had to ask myself, why don't you see them in any high performance application from the factory? The only conclusion I had was longevity and warranty. I ended up with a 4.25 stroke with a 6.385 rod. Another thing is big block stuff is heavy and they are harder to turn rpm with. Adding more low end torque and less high end hp didn't make sense for me where it may very well for you. I love this stuff.

[Steve1968LS2]

Originally Posted by Vegas69

I was considering doing an undersquare engine as well. I have a bore size of 4.280. My block will take a 4.375 stroke. Ultimately my engine builder didn't feel it was a good trade off in power vs. cost and longevity. I had to ask myself, why don't you see them in any high performance application from the factory? The only conclusion I had was longevity and warranty. I ended up with a 4.25 stroke with a 6.385 rod. Another thing is big block stuff is heavy and they are harder to turn rpm with. Adding more low end torque and less high end hp didn't make sense for me where it may very well for you. I love this stuff.

Because the factory uses inferior parts for the most part.. they certainly don't use forged cranks and all the other goodies that make a reliable under-square engine possible.

You combo was just barely under-square with a ratio of .978 ... I don't think it would have been a huge issue so long as you have good parts, especially the crank.

And you're right, there's a big difference between a big-block and an LS.. seems like you can get away with more on the LS side.

[Steve1968LS2]

Well, it doesn't feel like it but progress is being made.

The underside is scraped and the new Wurth stuff should be on there by tomorrow.

With any luck I should be picking up the rearend housing from powder this week as well, then we can put the rear back together and get her rolling again. Found that he axle tubes were pretty warped from the 3-link brackets so Currie cut off the ends and welded on new ones.. straight.

Parts are moving for the 460 cube RHS LS engine, biggest delay will be the 4.250 Lunati crank which is two weeks out. That's the only delayed part though.

Cam selected is a 247/261 .624 114 LSA stick.. Any guess as to power?

Should be good to go for having the car done by April.. knock on wood.

The LM clutch is over at Centerforce getting refubed (figured I might as well since it's out)

The oil cooler system is also in progress getting all hard lined up. The Setrab 925 fits perfect. This is being done at Fast Eddies Fabrication in Orange, CA.

[scherp69]

Steve...is that an autorad setup? Your car is amazing

[Steve1968LS2]

Originally Posted by scherp69

Steve...is that an autorad setup? Your car is amazing

Yea, there are more pictures earlier in the thread. Of course we're modifying it for the oil cooler deal.

The nice part is how much radiator is still uncovered even with the huge cooler.

And thanks for the compliment on the car.. it's a team effort.

[ohcbird]

Steve- are they going to put vibration isolators on the Setrab?

That's a good looking piece.

[ohcbird]

Power guesses? Hmmmmmm...need more specs (too lazy to surf the old posts at this point). My spider-senses tell me the driver is going to need to be retuned as well haha.

[Steve1968LS2]

Originally Posted by ohcbird

Steve- are they going to put vibration isolators on the Setrab?

That's a good looking piece.

They are there.. put them in myself today. Small pads at each of the four attachment points. Came with the Setrab mounting brackets.

Originally Posted by ohcbird

Power guesses? Hmmmmmm...need more specs (too lazy to surf the old posts at this point). My spider-senses tell me the driver is going to need to be retuned as well haha.

247/261 114 cam
461 cubic inches
11.5:1 compression
Lunati 4.250 stroke crank
I-beam 6.125 rods (609 grams)
Wiseco pistons
Mast Motorsports 12-degree big bore rec port heads
FAST 102mm LS3 intake
RHS race block, standard deck, raised cam - 6-bolt
Mike Norris ported LS2 TBW throttle body

And a bunch of other stuff that don't make power.

It will most likely make more than I need.. so I'm not going to be able to just flat foot it like I did before. I'm thinking I'm also going to have to run short autocrosses like Goodguys in second gear.

[bentfab]

Originally Posted by Steve1968LS2

Well, it doesn't feel like it but progress is being made.

The underside is scraped and the new Wurth stuff should be on there by tomorrow.

With any luck I should be picking up the rearend housing from powder this week as well, then we can put the rear back together and get her rolling again. Found that he axle tubes were pretty warped from the 3-link brackets so Currie cut off the ends and welded on new ones.. straight.

Parts are moving for the 460 cube RHS LS engine, biggest delay will be the 4.250 Lunati crank which is two weeks out. That's the only delayed part though.

Cam selected is a 247/261 .624 114 LSA stick.. Any guess as to power?

Should be good to go for having the car done by April.. knock on wood.

The LM clutch is over at Centerforce getting refubed (figured I might as well since it's out)

The oil cooler system is also in progress getting all hard lined up. The Setrab 925 fits perfect. This is being done at Fast Eddies Fabrication in Orange, CA.

Do I smell compition ?

[Steve1968LS2]

Originally Posted by bentfab

Do I smell compition ?

No.. Not really.. Fast Eddies is a hardcore fab shop and my go to guy for welding aluminum.

Since he was welding the tabs on for the mounts I thought I would have him bend the lines up front since he can bend stuff that big. It was more of a time saver since he's a few miles away and you're.. well.. farther. lol

The plan is to get her running and then take her to you for the gas tank trunk lines and a couple very hard lines in the engine bay.

You really need to move down to Orange County..