You're doing something wrong, my 5.8 was 3 seconds faster 0-60 than the current 5.0 and got 2-3 better mpg.

 

Not really.. it's more the stock truck cams, with a better suited bumpstick the motor hauls really well to 5000rpm

351 every time, it makes more TQ at 2000rm than the 5.0 makes anywhere. The stock heads certainly do become restrictive early on the 351.. like at about 4000rpm, but there are lots of options out there to fix that problem.

 

lol @ swap to a 300 I-6.

Rebuild the shortblock, use a nice head cam combo and add full exhaust. It will run well with the factory intake and efi and you will add tons of torque and power.
There are other options for all out power, but that route will make a nice powerful driver without breaking the bank.

 

I'm not sure how anyone would accurately gauge 0-60, but my 5000+lb 5.8 truck ran 10.3 1/8th mile and got 15mpg.

 

ColFlashman has a carbed 300.....Turns out 300 odd ponies.....GRANTED, that he has went over darn near every inch of the engine, its just the fact he has a Inline, running better hp than a 302....

 

I'm a big fan of I6's, but how is 300fwhp from a modified 4.9, "better hp than a 302"?

 

But the 302 is just getting started at 300HP , thats easy to do and theres so much more...Lew

 

....Thats alot of difference , i think there is something not right with your 302 , my 302 is a good 2 sec faster in the 1/4 mile than a lightning , it may be the timing curve ?? , my truck did not have alot of low end untill i had a chip burned for it , but what a difference that made , i don't think the 302 with a decent cam and heads runs very well with the stock computer settings , thats been my experiance with them....Lew

 

Problem is and will always be where the 302 makes power, you can play with it and modify it to a degree and it helps-but it will never be a low revving torquey engine like the 300, 351 or 460. It likes rpms, nothing much you can do about it. Problem is those who drive a truck dont want it to scream usually.

 

Nothing wrong with the 302.. it makes loads of HP on the top end.. kind of surprised me actually with how well it responded to a simple cam change.. hint hint.. nudge nudge, and I did a lot of playing with the tuner to see what more I could squeeze out of it, but torque is what moves the load and the 5.8 generates more of it so the truck accelerates faster with it. This is a direct comparison of engines with literally nothing else changed, same truck, same tires, same axle gearing, same trasnmission, so it really shines the light on the differences in these engines. Certainly there are ways to make the 5.0 perform better in this vehicle.. like add more gearing, but then it's no longer a fair comparison.

 

Exactly, you can take any stock 5.0EFI truck engine and by simply swapping out the stock cam for something like the Comp XE264HR you have a 275-280hp motor.. assuming the truck has an exhaust system with headers already. Pushing it over the 300hp barrier involves a little porting or a swap to GT40 heads, and like Lew said that's just getting started thanks to the extensive aftermarket catalog these engines have.

 

Let me rephrase....

I would love 300 hp on a I6, merely because all the power is in the lower rpm's, where it's readily available......WITHOUT having to rev like a SOB....Just my .02....But then again, I'm partial to I6's....

 

im just gonna say..1969-1970s mustang trans-am stock cars used tuned 302's. sure they wre built up with boss parts and modified haha, point being. its still a 302. i love 300i6's for their reliability and towing, i love 351's for their added power over a stock 302, but i do also love my 302 in my truck. having experienced a 460 yet but plan on it. anyways...id stick with a 302 since you wouldnt have to modify the engine mounts and this way you could just build that puppy up. the 302 was based off of a 427, just miniaturized (im reading this from V8TVshow.com) so i mean,,its modeled after some power.

 

A 300 horse 300 six is going to rev to make that power. At least 4000 maybe 5000 for that hp figure.

Also, the 302 is not a small scale 427.

 

put a 300 in it..its the best truck engine! if you want a go fast engine then by a car..just my .02 cents