Lsx 454
#1
On The Tree
Thread Starter
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
Bulding a 454 LXS for my Z28 98, I want it as a weekend street car but i dont know how high of a crank stroke I wanna go or the Con rod length. I dont want to go to high on the stroke to lose the RPMs or to low to lose the torque, Whats the happy medium? 4.100 crank with 6.000 con rods?
Thank You
Thank You
#2
TECH Senior Member
iTrader: (127)
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
Bulding a 454 LXS for my Z28 98, I want it as a weekend street car but i dont know how high of a crank stroke I wanna go or the Con rod length. I dont want to go to high on the stroke to lose the RPMs or to low to lose the torque, Whats the happy medium? 4.100 crank with 6.000 con rods?
Thank You
Thank You
with 4.1 crank and 6.00 rods will need 1.2 compression height pistons for a 9.24 deck motor. with .010+ protuding pistons.
assuming engine is assembled correctly with proper clearances, correct machining and assembly and premium parts.
5125 fps piston speed or 7500rpm is not out of the question with such an engine for max effort runs. street use 6,500rpm is not a problem
Last edited by NemeSS; 09-30-2009 at 04:19 PM.
#4
On The Tree
Thread Starter
#5
TECH Junkie
iTrader: (3)
Join Date: May 2003
Location: Clayton, North Carolina
Posts: 3,898
Likes: 0
Received 6 Likes
on
6 Posts
![](https://ls1tech.com/forums/images/ranks/ls1tech10year.png)
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
With a 6 inch rod the trigger wheel clearance and balancing will be problematic. Your best bet is the 6.125 rod or switching into the tall deck block and getting more rod length in the engine.
Kurt
Kurt
#6
TECH Addict
iTrader: (24)
Join Date: Oct 2006
Location: Webb City, MO...out in the garage
Posts: 2,608
Likes: 0
Received 0 Likes
on
0 Posts
![](https://ls1tech.com/forums/images/ranks/ls1tech10year.png)
![Default](https://ls1tech.com/forums/images/icons/icon1.gif)
both, it's just a toy, not a dedicated race car, more of an extreme street car. i'm not worried about spinning it to the moon. as long as it's not on the rev limiter when i cross the line at the track i'll be happy.