[91cobra5.0]

what kind of numbers dose a stock 351w make?

[acmillr]

I would guess anywhere between 50 and 3500 HP depending on the set-up. What exact kind of build are you talking about here?

[1slo5.0]

Originally Posted by 91cobra5.0 what kind of numbers dose a stock 351w make?

Less than a 5 liter HO. Most 351W were turds from the factory. They use the same heads as a 302.......just a poor all around engine.

[91cobra5.0]

Originally Posted by Darrell Less than a 5 liter HO. Most 351W were turds from the factory. They use the same heads as a 302.......just a poor all around engine.

id assume the block is stronger?? since a lot of people use them high power producing number engines. would you be able to stroke out a 351w and make a good N/A motor out of it?

[beheivjer]

you can stroke a 351w out to a 427. you would need to do some serious work to the heads though but it would be about 450hp, I would not use anything but a sportsman block. they are stronger. we had a guy in my shop take and build a 454 out of a 351w sportsman, it lasted him a couple of months. it was efi and it sound amazing and ran even better

[beheivjer]

The set of heads i found that would flow right would end up costing me about 1500 when done

[r.barn]

"stock" 351 is a truck engine.
make more torque than hp.

my N/A 351W with .030 over for 357ci, 10.3-1 compression
AFR185 heads and off the shelf CompCams cam made 365rwhp at 6,000 rpm.

Simple H/C/I swap on 351W will wake those engines up in to the
450-500hp range easy.

Unless you plan on making over 500rwhp the swap is not worth the trouble though.
stroked or blown 302 will make that with half the headaches.

[1slo5.0]

Originally Posted by 91cobra5.0 id assume the block is stronger?? since a lot of people use them high power producing number engines. would you be able to stroke out a 351w and make a good N/A motor out of it?

Yes the block is stronger and yes it will support some relatively large horsepower numbers both N/A and with a power adder.

[beheivjer]

a sportsman block is alot stronger if building for max power on it

[beheivjer]

a carbed 351w was rated at 150-160hp net ratings 250 hp gross rating

efi is rated at 200-235 hp

[91cobra5.0]

well im asking becuase when i come get back home to california in about a year and a half id like to build a 65-69 mustang with a big all motor engine. but of course this would be a bit of time from now but id still like to start planing and saving

[r.barn]

Cant wrong with a high compression, big head, big cam 408W.
right combo will push 500rwhp N/A

[91cobra5.0]

is it hard to get over 500 n/a? no juice

[boostjunkie]

I know a 351 stroked to a 408 makin 500 to the crank? No boost anybody want the number to where she sits, let me know...

[r.barn]

Originally Posted by 91cobra5.0 is it hard to get over 500 n/a? no juice

depends how streetable you want the cam.
It's not hard per say, but you'll have some compromises in low end idle and such.

11-1, Solid roller cam 408W with nice big heads and everything built
to spin the motor to 6,500-7,000+rpm would probably break 500rwhp.

500 crank hp is easy. My 357ci made 475hp at 6,000 rpm on engine dyno
with relatively mild parts.

[boostjunkie]

Originally Posted by r.barn depends how streetable you want the cam. It's not hard per say, but you'll have some compromises in low end idle and such. 11-1, Solid roller cam 408W with nice big heads and everything built to spin the motor to 6,500-7,000+rpm would probably break 500rwhp. 500 crank hp is easy. My 357ci made 475hp at 6,000 rpm on engine dyno with relatively mild parts.

Like I said it has happened!

[1slo5.0]

Originally Posted by 91cobra5.0 is it hard to get over 500 n/a? no juice

500hp at the crank or wheels. 500hp at the crank is easy. 500hp at the wheels is going to take a bit more.

[boostjunkie]

I'll guess at crank, only because unless you add a power adder. You will be at a teed bit over 500. Like I know (for a fact) where your going to get the most out of that combo. Not trying to be a know it all, but then I would hate to free advertise for this engine builder, and get my A$$ booted off here. This motor has well over 35 grand in it.. (you have to figure all the testing involved, and etc) Sad thing the guy has given up on this project,I was trying to call him to buy it off him, and failed due to out of service numbers.

[1slo5.0]

Originally Posted by boostjunkie I'll guess at crank, only because unless you add a power adder. You will be at a teed bit over 500. Like I know (for a fact) where your going to get the most out of that combo. Not trying to be a know it all, but then I would hate to free advertise for this engine builder, and get my A$$ booted off here. This motor has well over 35 grand in it.. (you have to figure all the testing involved, and etc) Sad thing the guy has given up on this project,I was trying to call him to buy it off him, and failed due to out of service numbers.

Could you repeat that in english please? From what I could understand you know of an engine that makes a bit over 500hp at the crank and the guy has $35,000 in it. Sounds like that guy is a fool because that is about 7 times the money it should take to make 500hp. I don't quite understand where you were going with the "getting booted for mentioning the engine builder". All I know is for $35,000 and 500hp I'd never go back to that builder.

[boostjunkie]

Originally Posted by Darrell Could you repeat that in english please? From what I could understand you know of an engine that makes a bit over 500hp at the crank and the guy has $35,000 in it. Sounds like that guy is a fool because that is about 7 times the money it should take to make 500hp. I don't quite understand where you were going with the "getting booted for mentioning the engine builder". All I know is for $35,000 and 500hp I'd never go back to that builder.

Sorry! I am Italian so my words come off diff from what you notice. It was due to the parts, pro-charger everything involved. This is what I was told..