Ford 521 stroker np435 Conversion
Thread Starter
|
New User
Joined: Mar 2013
Posts: 7
Likes: 0
Ford 521 stroker np435 Conversion
I bought a ford 521 stroker that was previously a 429. I also have a Np435 that i would love to hook it up with the Engine. From what i understand and have read im going to need to buy a Ford 400 Bellhousing but what puzzles me is that clutch and flywheel situation. After a few weeks of reading about the conversion i ran across this Kit from L&L
L&L Products
and need to know if this clutch would hold up to the 600hp the engine puts out. If not any point in the right direction would be greatly appreciated. Thank you in advance for the help.
L&L Products
and need to know if this clutch would hold up to the 600hp the engine puts out. If not any point in the right direction would be greatly appreciated. Thank you in advance for the help.
Cargo Master
Joined: Nov 2009
Posts: 2,364
Likes: 117
From: starship enterprise
First of all, A 521 is going to be a pretty tall order to build 600 hpon pump gas, not impossible, but probably well into the 6000 rpm range. My 545 is 11.2:1 aluminum headed and hits 6000 rpm, I might be 600 but not over for sure. Anyway, I would say that you will be fine to use that kit for your combo, L&L makes very nice stuff (except the engine mounts)
Elder User
Joined: Feb 2011
Posts: 633
Likes: 1
From: Grande Prairie, Alberta
First of all, A 521 is going to be a pretty tall order to build 600 hpon pump gas, not impossible, but probably well into the 6000 rpm range. My 545 is 11.2:1 aluminum headed and hits 6000 rpm, I might be 600 but not over for sure. Anyway, I would say that you will be fine to use that kit for your combo, L&L makes very nice stuff (except the engine mounts)
It's not cheap though, I have about $10,000 in my engine.
Postmaster
Joined: Oct 2010
Posts: 4,656
Likes: 4
From: Northern and Southern Cal
Trending Topics
Save the old ones
Joined: Dec 2002
Posts: 666
Likes: 4
From: Boyne Mich
Marc,
Looking at your list of toys, I wanna be you, but with time to drive them.
Hee hee
I understand the time thing. Cant seem to find enough time to finish my current project.
Looking at your list of toys, I wanna be you, but with time to drive them.
Hee hee
I understand the time thing. Cant seem to find enough time to finish my current project.
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
Rezvani's Latest Post-Apocalytic Monster Is a Ford F-150 Raptor Underneath
Verdad Gallardo
Top 10 Most Expensive Ford Trucks Ever Sold on Bring a Trailer
Joe Kucinski
2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)
Brett Foote
Top 10 Ford Truck Tragedies
Joe Kucinski
AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make
Brett Foote
Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!
Michael S. Palmer
Ford's 2001 Explorer Sportsman Concept Looks For a New Home
Verdad Gallardo
10 Best Ford Truck Engines We Miss the Most!
Joe Kucinski
2026 Shelby F-150 Off-Road: Better Than a Raptor R?
Brett Foote
Elder User
Joined: Feb 2011
Posts: 633
Likes: 1
From: Grande Prairie, Alberta
Postmaster
Joined: Oct 2010
Posts: 4,656
Likes: 4
From: Northern and Southern Cal
If it was me I would be concerned about "slight rough engagement".
If its a toy and in the mud or off road at all times then Ok. Crawling trails might be a pain. I couldn't use that in my build. But you're not me.
I might contact them and see exactly what that means. They may have something better for you. I've found that direct contact with the manufacturer is always best. It's so easy these days, no big deal.
Good luck.
If its a toy and in the mud or off road at all times then Ok. Crawling trails might be a pain. I couldn't use that in my build. But you're not me.
I might contact them and see exactly what that means. They may have something better for you. I've found that direct contact with the manufacturer is always best. It's so easy these days, no big deal.
Good luck.
Save the old ones
Joined: Dec 2002
Posts: 666
Likes: 4
From: Boyne Mich
Clutches slip due to torque, not so much because of hp.
Bigger diameter is better. 12" stronger than 11"
What does L&L say?
Another thing to ask about is the pressure plate spring force. Higher the pressure, stronger the clutch. It is harder on the left leg to push though.
Bigger diameter is better. 12" stronger than 11"
What does L&L say?
Another thing to ask about is the pressure plate spring force. Higher the pressure, stronger the clutch. It is harder on the left leg to push though.
Last edited by Drac; Apr 16, 2013 at 03:44 PM. Reason: broken english