- Joined
- February 8, 1999
- Messages
- 35,783
- Reaction score
- 3,919
- City, State
- Wayoutin, Aridzona
- Year, Model & Trim Level
- '93 XL '20 ST
- Callsign
- AB7FH
I know we have a lot of members with 300k+ on their 4.0 OHV V6s, but do the 5.0s last that long too?
Great example, the 4.0 SOHC is a time bomb, with my care it may go 200k, or 500k, but I'm changing the timing chain components timely, every 75k or so. That engine isn't fair to compare with,
The pistons are weak links if you try to upgrade parts
The pistons are the last thing Id worry about on a 5.0L
Had a friend who had Trickflow head, intake, cam with a s-trim on a stock100,000 miles short block that dyno'd a hair over 550hp. The block ended up ripping completely in two. Bad tuning is what ruins pistons.
I remember Lidio made a point when he had 21psi on a stock 97 cobra engine and ran it all season (high 9's, over 50 passes at 8,000rpm with a 4r70w) with no issues when people said the stock hypereutectic pistons wouldn't be able to handle that amount of power and boost.
http://www.alternativeauto.com/10_inside_our_9_second_dohc_32v_stock_pistons_and_all/
I have heard of the stock rods stretching and rod bolts breaking on motors that continuously see +6,500rpm.
The pistons are the last thing Id worry about on a 5.0L
What a 4.6 piston is capable of does not make an argument for or against a 5.0 piston.