MyWs62FaST4u

iTrader: (2)

I plan on running a DD, twin turbo Trans am. I am now complete, in funds that is. Should i go with a 408 forged shortblock, or just go with the bigger with the LS2 based 418 stroker? Who does the bst work? I dont want a no-namer...
I do want to use that aluminum LS2 block... but hear the iron 408 is better. what do you think???

Reckless

iTrader: (9)

The added cubes are not going to benefit you as much as you might think. Many have had tremendous success with smaller engines. Just choose what you want, because in the end if you are not happy with it, then what is the point?

Stang's Bane

iTrader: (22)

I agree, if you are going for a max effort motor the cubes are not that big off a deal. You can make 1,000 rwhp on 347 almost as easy as you can on a 408, BUT if you are not looking to go that high I believe the extra cubes will pay off in driveabilty. The reason I say that is say a 650 rwhp motor will not be as much of a "light switch" like power delivery on a bigger motor compared to a smaller motor. jmho

Nate_Taufer

iTrader: (1)

I would stay with the 402. The added cubes aren't that big of a deal. Hell get the new L-92 block and stay with the stock stroke. It would take advantage of the big bore if you do decide to stay twin turbo and make tons of power.

I still think you should go with a custom YSi setup or a F1 setup. With the manual tranny on a street car the blower will be a lot more fun and reliable.

Nate

MyWs62FaST4u

iTrader: (2)

thanks guys, and thanks nate... that l92 must be something i have heard so far...

MyWs62FaST4u

iTrader: (2)

so much that it has replaced the ls2 based stroker idea for most people, think its comparable to the ls2 based strokers, in the sense that it can match the #'s of a ls2 based..

bg-sdpc

iTrader: (4)

We will have our 415 L92 short blocks on the shelf in about 3 weeks. The one you need with the turbo deal would have 2618 material pistons and a "Hell Fire" rings set so it will live under boost. $4699.95 + shipping.
Includes:

L92 block 4.065" bore with all plugs and dowel pins
Eagle 4.000" stroke crank
Scat 6.125" "H" beam
Manley custom -14cc Dish 2618 material pistons with tool steel pins
Total Seal brand "Hell Fire" style rings with Napier second. 1/16; 1/16; 3/16
Clevite "H" series race bearings
Durabond cam bearings.
Complete break-in instructions
GM Engine Oil Suppliment
Fixed orifice PCV valve
Engine cradle and shipping crate (good to store old engine in)

Also, we just got some of the complete L76 intakes in today.

SLED28

iTrader: (7)

Which TT kit?? I would go with a alum LS2 in either 402ci or 415ci size motor topped with AFR 225 heads. You won't be dissapointed

btwarrior

The bigger cube will make great power on lower boost. The smaller the engine the more you have to LEAN on it. Thats why the outlaw racers are using 600-800 cube engines with twin 106's @ only 15-20 psi boost. Conservative tune=longer life on motor. And just think, you can always turn it up more!
Just an opinion here, but those 'hellfire' top rings only lasted 2000 street miles for me, using the recomended finish hone. Go with a coated steel top ring.

Quickin

The more cubes the better, ALWAYS. T...TT or SC'ed. Just depends if your builder knows what the hell he's doing. From the research I've done talking to SERIOUS experienced turbo builders; Its easy to stuff compressed air into a smaller engine and get whatever you can out it running rather lean, and being a little on the unreliable side, but when you know what you're doing you can use a bigger cubed engine, same psi or less, and get ridiculous power and run rather rich all the time. Its all about knowing what you're doing.



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Zach@Texas-Speed

iTrader: (7)

We have two boost motors built. They have the same components as the Twin Turbo C6 of ours that makes 998rwhp. It will have the Severe Duty Forgings Mahle -30cc boost pistons, ARP 2000 rod bolts on Scat H-beam rods, Eagle Cranks and ARP Main Studs. Let me know if your interested in this motor!!

Zach

Whistler

iTrader: (46)

I would run the smaller engine. You might even consider a L92 or LS2 block with a 3.622 crank in it for even less cubes.
You can get the same peak numbers, with the same turbos on a smaller engine, but kill a little of the low end torque. More power and torque is always good, unless you're trying to drive it around on street tires every day.

Blown04Z06

if i were to do a turbo set up on a F-body i would run the LS7 wet sump 427 with -32cc dished pistons, from scroggin, they have put together a full turnkey crate motor for $12,775 shipped + the biggest single turbo set up i coud find and run 10-11psi on pump gas. like someone else said you can make more power with less boost with bigger cubes. thats what i would go with, least amount of effort to make the most useful power possible.

Phate

iTrader: (2)

Do the smart thing, pick up the phone and call W2W. Look at the fastest LSx based motors and who built them.

AppleMac

iTrader: (3)

Ditto!

W2W FTW!

You may also want to take a look at the new GMPP LSX motor that will be out this spring...

Quickin

Not everyone has $50,000++ for A TT set up though, and for a 1,000 RWHP set up thats what it'll cost from W2W.

The identical engine can be had for near half that from other builders. I got a price from W2W for a 1,500 RWHP TT set up.....$120,000, and that was an estimate.

Call NRE and get a pump gas 408ci TT with 1,330 HP for about $30,000.


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Phate

iTrader: (2)

I don't know who NRE is...and chances are most people on here don't either.

He asked for the best, W2W is it.

Quickin

Badass shops don't need to be sponsors places either. And actually alot of people know who NRE is on this site, they all over their stuff.

Not by a long shot. Good, yes, the best, no way on gods green earth.


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Phate

iTrader: (2)

I'm sorry, I must have missed it then...who put together the fastest LSx motor?

Quickin

You should read the fine print. Just because you got suckered into buying an engine from a place that makes people believe they built something, doesn't mean anyone esle has to. Its all about advertising and sucking people in to sell engines, you're one of them.

Right from their site, under the ad for that 100% custom twin turbo drag car that took one year to build.

Even though Wheel to Wheel Powertrain didn’t officially build and does not own the car or engine, we are capable of and excited about the prospect of building similar projects for customers. I think that the employees listed above demonstrate the passion for performance that our customers will receive.

And the title of "oh, we have the fastest car changes hands all the time"....it means nothing. And you really shouldn't go around telling people that this or that shop is the worlds best when all you've done is hang out on the internet, the world is much larger. The fastest W2W built LSx car is 7.69 @ 181 BTW.