351w EFI performance upgrades?
#46
#47
I've owned a 351 powered 3/4 ton, with 410 gears... I'd take my 460 with 355s any day over that pos.
Even as a daily driver, 410s won't hurt you any at all in my opinion. My 351 got same mpg as my 460 with the same gears. Even with more power, you need to get the cruise rpm a little higher.
Start with a few simple mods like a good tuneup. Gather the parts for engine.
Ask questions.
You can always do gears later if after increasing power still doesn't make the difference you're looking for.
Even as a daily driver, 410s won't hurt you any at all in my opinion. My 351 got same mpg as my 460 with the same gears. Even with more power, you need to get the cruise rpm a little higher.
Start with a few simple mods like a good tuneup. Gather the parts for engine.
Ask questions.
You can always do gears later if after increasing power still doesn't make the difference you're looking for.
#49
#50
As you can see the topic is highly debated. Some basic bolt ons are guaranteed more power. 3.55s and stock tires are reasonable to start with. Do the suggested motor upgrades then go to lower gears (bigger numbers) if you need more.
In all honesty I doubt you will see much gain by going from 3.55 to 4.10 with the HP/TQ the stock 5.8L engine has. Yes, it will be a little better but not enough to justify the cost. A swap from 3.55 to 4.56 or 4.88 would be a night and day difference but then 1st gear use is pretty much useless. I vote for more motor with your $2k budget.
In all honesty I doubt you will see much gain by going from 3.55 to 4.10 with the HP/TQ the stock 5.8L engine has. Yes, it will be a little better but not enough to justify the cost. A swap from 3.55 to 4.56 or 4.88 would be a night and day difference but then 1st gear use is pretty much useless. I vote for more motor with your $2k budget.
#52
#53
If you're going to port the 351 lower like I had suggested, all you need is the upper from the 5.0 intake. If you're at a junkyard, I suggest taking the upper from the 5liter, and then get an extra 351 lower to port. Especially if they are charging you for everything.
#54
It's been a while since I've had the pieces in front of me, but I'm pretty sure you can't mate a 5.0 upper to a 5.8 lower....the ports dont line up. As in the ports of the 5.0 would protrude into the adjacent port of the 5.8 intake.
Gearing is an attempt to solve a problem by masking the problems roots. The engines of this era, particularly the sbf 351, suffer from terrible and embarrassing power production. Giving the engine a healthy upgrade is a good thing, it's severely underpowered from the factory...modern power levels are achievable with very little money.
Gearing is an attempt to solve a problem by masking the problems roots. The engines of this era, particularly the sbf 351, suffer from terrible and embarrassing power production. Giving the engine a healthy upgrade is a good thing, it's severely underpowered from the factory...modern power levels are achievable with very little money.
#55
Nope, not that I remember. I can take a pic tomorrow of one I hogged out with my milling machine. (If I go to the garage)
351 intake is symmetrical ovals. The 302 intake has some weirdness, but being that the bolt pattern is the same, it's easy to match the ports with the correct tools. $20 carbide burr for aluminum, and a $10 harbor freight die grinder.
351 intake is symmetrical ovals. The 302 intake has some weirdness, but being that the bolt pattern is the same, it's easy to match the ports with the correct tools. $20 carbide burr for aluminum, and a $10 harbor freight die grinder.
#56
#58