Phil99vette

iTrader: (11)

We tossed around a few different stroke combinations and we wanted to find a good combination of stroke vs gearing out back. With a converter and tranny package that sees less than 4% slippage out the back door our choices seem to be pretty clear. Shawn is setting up the motor to be low RPM torque monsters and maximize the tranny. We're hoping to see 1-2% slippage out the back door next year with an even tighter converter.

fenton06

iTrader: (1)

Wait, you said tighter? I thought you already blew everyone's mind with spooling the turbo as is?

brandoz28

iTrader: (3)

i like the way shawn thinks........makes me think hard about that 6.0 sitting behind my car in the garage lol

Phil99vette

iTrader: (11)

Just for an idea of the torque the motor makes.... 4 1/2# of boost at 4000 rpms nets a 1.28 60' with the wastegates hanging open. Most other guys leave at 10-12@ of boost with more RPM.

JL ws-6

iTrader: (50)

Maybe I need to boost this 14.5 to 1 408 I have then

lt1camaroman93

iTrader: (7)

I'm so envious right now. I'd like to get under 10-12%, lol.

Shawn @ VA Speed

iTrader: (3)

all as i can say is,I can't wait till next year.Finally able to build a real motor for this car.A clean sheet of paper,no more having to make other parts work.

White.Lightning

iTrader: (53)

Show us what you can do! I'm anxious as well as everyone who follows this thread

Phil99vette

iTrader: (11)

Shawn and I talked about the plan....I'm not soo sure your going to get alot of pics, the stuff we talked about has not been done in the lsx world yet. Should be interesting to say the least.

JL ws-6

iTrader: (50)

Always nice to start with a clean slate. I'm hoping this 408 sells myself just for that reason. It's a good piece with alot of good parts, but it's always better to be able to start from scratch with stuff that's all meant to work together
I'm sure, with a marcella sheet metal it will probably do what I want... but it's gonna have to be on kill all the time to do it.

White.Lightning

iTrader: (53)

I was implying ET's and what not........not Shawn's tricks of the trade. Get the motor built and lets see how fast she can fly!!! Best of luck.

Wnts2Go10O

iTrader: (12)

aw, come on. its not like you need to give us head flow numbers, cam cards, intake specs, etc

Phil99vette

iTrader: (11)

You know Shawn gets under my skin sometimes. So we're talking and he is like.... "You know I really want a fresh slate to start with and the block is a good start. What do you think about a new set of canted valve heads". WTF kinda **** is that. Thats like smoking crack infront of a crack addict.

So now we're going with a ~455" RHS, Bryant CCW Billet Crank, GRP rods, JE Pistons with N/A Compression , Jesel Rockers, PI/Mast Mozez heads, New Sheetmetal intake with 16 injectors from John M marcella and some tranny mods to lower the converter slippage.

Wayne said...***** thats our motor with a 106mm turbo.

Shawn @ VA Speed

iTrader: (3)

how is it always my fault?

Phil99vette

iTrader: (11)

Maybe you need to stop coming up with cutting edge ideas.

Beaflag VonRathburg

iTrader: (176)

I'm sorry you lost your engine on the first outing. No matter which way you look at it after that much work it sucks. It's crazy you guys are looking for less than 4% slip. I know some people who'd kill for those kind of numbers.

Phil99vette

iTrader: (11)

Well you got 2 ways you can go. You can make a low torque high RPM motor or a high torque low RPM motor. With a low torque high RPM motor your going to fight, loose converter to get it to spool, excessive converter slippage out the back door which will make you run a bunch of RPM. You will eventually change to 3.20 or 3.25s which will make your ability to 60' even harder. This combo will definitely be harder on valvetrain parts.

With our tranny package, 8500 RPMs will net 210-212mph. The comparable 10% numbers works out to 194. Basically its a system that has to work together and every piece effects the next.

Nitroused383

iTrader: (10)

Do you consider 8500 low rpm for a 455 ?

Shawn @ VA Speed

iTrader: (3)

it's not high.The engine will be capable of 9000rpm without much problem.Were not leaving much on the table on this build.

Nitroused383

iTrader: (10)

If this is Phil's example of a high torque low rpm motor how much rpm does a low torque high rpm turbo motor spin? I do agree on building an engine to make as much naturally aspirated torque (with some differences) and having a proper turbo system to match.