Anyone have any guesses on rwhp/rwtq?
This setup will be dyno’ed on a dynojet in nice HOT sunny TX weather within the next few weeks.

Here is the breakdown:

LME 427ci LSX

Block: LSX cast iron
Crankshaft: Callies Compstar 4.0” stroke
Rods: Lunati billet rods 6.125
Bearings: Clevite H-series rod, main, and cam
Pistons: Wiseco 4.125 9cc
Rings: Childs and Albert Fire Power
Camshaft: most likely around a 253/259 6xx/6xx 112lsa
Heads: MTI Stage 3 ls-6 heads, with head studs, and PRC dual valve springs
Roller Rockers: Jessel 1.7
Intake: FAST 90mm with NW 90mm TB
Injectors: Siemens/Mototron Deka 4 Flow-Matched 60lb'ers
Ignition: MSD coil kit

Fuel System: Racetronix 340 kit(I was told that this should support 650 rwhp).
I am also not 100% sure if the car has a volt blaster too.

All of this going through a Circle D 3600, Mike Kurtz(Century) 200r4, steel ds, and a Moser 12 bolt(275 60 28 MT DR’s). The jug will be on the car, but won’t be hit until after break-in...

The car will be SD tuned by Scott at SQR.


I would be very satisfied with 550/500 through an auto NA.

What is CR?

550hp is possible but the trans,rearend and the tires will eat alot of power.
Good luck and keep us posted.

Thanks.
My last MTI 427ci motor put down 512rwhp through the same setup with a cracked Lunati billet crank, lol.

I'm guessing around 11.5:1.
I was told 93 pump gas will be fine for this motor.

I went ahead and upgraded to some 60lb injectors for this particular application.
I figure the 340 pump and 60's should suffice for the car on motor.

Any other guesses on what this combo will put down?

When are dynoing the car?

Keep us posted man the cracked Crank should make alot of diffrence.

Any track goals?

You will have more than enough fuel. Very good thing..

Looking forward to seeing the MOTOR and SPRAY numbers bro. Good luck !!

The car will be dyno'ed at SQR = Simple Quick Racing.
Track goals are probably mid 10's, but I bet she does a bit better than that!
The car has 1 7/8th Kooks LT's and TSP true duals going into Moroso spiral flows.

I'm trying my best to do everything RIGHT the first time, so criticism is welcomed.
Thank you everyone on this site...I've learned a lot just from reading what others have posted.
I even bought a digital camera mount and camcorder, just so I could share this car with you guys.



P.S. - I went ahead and picked up some MSD coils last night as well(because of the price I got on them )
I gotta stop buying crap for this car, lol.

That motor should make an honest 400/400.

That motor BETTER make a wee bit more or I'm gonna have to fire the tuner!

Man I think 550/500 is a very safe guestimate. Yes we get hit pretty good since we are going through an A4 and 12 bolt, but it's going to roll hard!

Considering we made 538/500 with a comparable drivetrain set up, I'd have to say a lightweight 427 as you have described would lay down 550/525 with high 9 second capabilities in decent air with a sub 3400# car.

Keep us updated!

its all going to depend on the torque converter,choose well.breaking into the nines will be easy with the right combo.

I would be shocked if it made 550 through your drivetrain

Last MTI 427ci motor made 512 rwhp through the same DT.
The convertor is a Circle D 3600, 9.5" Billet, through a Century Built(Mike Kurtz) 200r4.
Motor comes in this weekend...stay tuned!

I think that 512rwhp pull was on ET streets,through full exhaust and with a baby camshaft. It had much more potential.

If you swap to the DRs, a better suited cam and let the exhaust breathe as it should for a track set up (dual cut-outs) I think you will be pleased.

Good luck!!