StrokexBore Combo for a LSX block based nitrous motor
Thread Starter
On The Tree
Joined: Jan 2013
Posts: 197
Likes: 1
StrokexBore Combo for a LSX block based nitrous motor As per my other post about using an LSX block for a nitrous motor.
What would be a good bore x stroke to use?
I was originally going to build a stock block 408. Should I still use that cubic inch just in a LSX block.
I was also looking at a 4.0 stroke 4.125 bore motor for 428cuin motor.
I want to make sure that I have enough compression height/piston deck on the pistons and obviously with more stroke the thinner the piston gets.
I do like a 4.1 stroke 4.125 bore 438cuin, but I'm not sure I could spray a lot of nitrous on that piston.
This motor will have TF GenX255 LS3 heads, with a vic jr (for now) with a single stage fogger.
I want to be able to spray 400hp+ on this motor.
Thanks,
What would be a good bore x stroke to use?
I was originally going to build a stock block 408. Should I still use that cubic inch just in a LSX block.
I was also looking at a 4.0 stroke 4.125 bore motor for 428cuin motor.
I want to make sure that I have enough compression height/piston deck on the pistons and obviously with more stroke the thinner the piston gets.
I do like a 4.1 stroke 4.125 bore 438cuin, but I'm not sure I could spray a lot of nitrous on that piston.
This motor will have TF GenX255 LS3 heads, with a vic jr (for now) with a single stage fogger.
I want to be able to spray 400hp+ on this motor.
Thanks,
Seems like if you are spraying 400+ the difference of a few extra cubes won't be nearly as important as strength.
Since every 0.10" of stroke is only worth about 10-11 cubes I would think a 3.9" stroke would be a good choice. It would give you another 0.10" of journal overlap (compared to a 4.0 stroke)...beefing up the weakest spot on the crank and allowing for additional C/H on the piston.
Just my .02
Since every 0.10" of stroke is only worth about 10-11 cubes I would think a 3.9" stroke would be a good choice. It would give you another 0.10" of journal overlap (compared to a 4.0 stroke)...beefing up the weakest spot on the crank and allowing for additional C/H on the piston.
Just my .02
Not saying a 4" is a weak set up (I have a 4" myself). Just the OP expressed concern about compression height so I offered a solution. At the level he wants to be I doubt he'd miss 10 cubic inches.
Trending Topics
1.2x Compression height would be great for "Heavy" nitrous use but you're not going to get that in a std. deck height and make cubic inches. That's where 9.8" deck height blocks with a 4.25" stroke come in handy.
A 4" stroke with a 9.24" std. deck height will net you a 1.115" compression height. Many have used this with very good success.
A 3.9" stroke would give you a better compression height then a 4" like was mentioned earlier by 74u and would work well also. ( don't know C/H off the top of my head)
Both the 4" and 3.9" will work fine.
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
Topdon ONE vs. Artidiag 800 BT2: Which is the Diagnostic Tablet For You?
Pouria Savadkouei
Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine
Verdad Gallardo
7 Most Reliable High-Performance Engines GM Has Ever Built
Verdad Gallardo
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin
Verdad Gallardo
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
