i have a ls 6.0 in my foxbody coupe now an i want to sell it with TSP prc heads an cam in it. 406 rwtq pump gas. RPM in Raleigh nc tuned it .. I want to build a ls3 427 or 454 lsx block from Tsp.. 150 to 200 nos spray when needed .motor going in the fox body mustang coupe .. i still want to drive the car to the store an car wash exc.. am i asking to much going this big Its a street an strip car mostly street race ..?????? I know i cant have both of both worlds bur i can try help is needed
i have a 16 zo6 LME hc 7xx + alky rwtq i want my stang to have at less 600 rwtq

 

If you go up to the 4.125+ bore and have the hod clearance for good intakes I’d look at ls7 heads

 

Im new to doing this so excuse me if i ask crazy question. Trying to get all my ducks in a row beforei start spending .. $$$
What's hod? Will fast intake work mid runner or high
Ls7 head by who Gm , Tsp mast
how i know what valves to choose for the heads
hydraulic cam or solid ?

 

600 RWTQ is going to take cubic inches for sure. The 454 would be easier to achieve it, but don't expect a high RPM combo either.

To feed an engine that size, plan on spending some $,$$$ on cylinder heads and a properly matched intake for it.

Your goal is possible, but I wouldn't expect it to have the best drivability manners. It's all about the combo. I wouldn't get hung up on chasing a dyno number either. If it's fast enough for you, then who cares what it makes. Time slips don't lie.

 

So what combo would build
lsx block 416 427?
heads

 

Here's what I would build if I didn't have a budget:

LSX 9.720" Tall Deck Block - part number - 19260100
Callies Magnum Crank - 4.500" stroke - part number - APQ-31T-MG
Callies Ultra XD I-Beam Rods - 6.125" - part number - U18170
Custom JE Pistons - 4.185" bore
Frankenstein All-Pro LS7 12-4 Heads - part number - FED ALL-PRO LS7 12-4
All-Pro Cast Intake ported to match - part number - custom
Jesel Shaft Mount Rockers - part number - unknown
Jesel .903" Lifters (link-bar or keyway) - part number - unknown


The above listed items are EASILY over $25K without any machine work or valvetrain. Not cheap, but it'll get you where you want to be.

 

id have to agree with hammer. an LS7 top end on an LS3 = mean ****.


plenty of choices for LS7 heads depending on your budget but if you have the money, id go All Pro heads

 

LSX Block, 4.155" Bore (200 Shot) X 4.125" Stroke ~440"
Callies Magnum Crank & Billet I Beam Rods.
MMS LS7 HEADS
New Fast Tunnel Ram (should be available soon), should also fit Fox Hood.
or Pantera EFI ITBs
Cam Motion LLSR .700" Lift,
Valve Events Specced by
Pat G. , SpeedTigger/Steve @ Cam Motion or Tony @ MMS.
12.0-12.5:1 Comp. custom CP Pistons
Crower SS Shaft Rockers (Bushing)
Black Mamba Bushing Lifters.
My Suggestions/.02. With unlimited budget.
Good Luck

 

Attached is my "Dream LSX". I don't see the budget for this in my future though, unless I will the lottery.

 

$31,000 in parts and no Dry Sump Oil System for
a no limit Dream Build?

 

I think this guy's a drag racer, and drag racers don't need no steenkin' dry sumps....

 

I was lazy. I spec'd it out for my 2005 GTO and just "assumed" I'd keep the stock pan.

Awhile back I designed a billet LS Dry Sump Pan that was produced by a top name company and was run on Daytona Prototype cars. I guess that would work.

 

Drag Race Engines at this Investment Level Use and Benefit
From Dry Sump Oiling, ask Dustin Lee @ DLRE
just to name one.

 

Lt4 LME port an polish heads for my 2016 zo6
adding whipple supercharger
Cam 225/240 .635"/.624" 116+6

 

i sent u a pm

 

thanks for ur advice today

 

Need help picking the springs an valve on the 305 or 285 mms heads for Lsx

 

I was actually being a little(??) facetious since it basically requires the oil pickup to suck from the back wall of the pan, but you make a very good point! Have a great evening, man!

 

You’re welcome man

 

I like ls3 stuff for versatility. So many options and intake options. Ls7 will
Make a few more HP in the end but aftermarket ls3’s are darn good heads IMO. Fast is shitting the bed by not offering shorter runners for the ls7

An ls3 headed motor with a high ram is ***** of **** if you have the clearance for it