I apologize if this is the wrong place to post this.....but i was just curious and i know its just a guesstimate, how much power do you think this 351w is making? its out of an older bronco (smog motor) low compression and we stuck it in an 87 notch....all the smog equipment is off of it now, and it has an edelbrock 800 carb, edelbrock intake, edelbrock performer cam Duration 270/280, Lift .448/.472, bbk shorty headers and flowmaster exhaust....any ideas? it pulls strong.
351 windsor
- Thread starter Alex Kraczek
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Three50won
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95Vert383AOD
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Probably about the same power it made in the Bronco +2hp for the smog and maybe a couple more for the carb. You didn't say anything about heads and intake. They are the biggest bottlenecks. The lift on that cam is pretty stock as well. It pulling strong is because of the Torque (stump puller)
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If that thing's eating with an 800 cfm carb and not bogging you can bet your efi happy butt it's making more than 200 hp.... just sayin, been there, done that.
Yea, but we're talking stock iron heads and a flat tappet cam, with God-knows-what for compression. It's probably making more than 200, but it's not setting the world on fire, either.
To the OP, get it dynoed and let us know!
If it is, it isn't much more. A good breathing intake side means nothing when it's bottlenecked through a set of stock cast heads spinning low compression slugs. Not to mention that's a Truck/RV cam. No performance potential at all. It probably runs nice and pretty torquey, but I bet it falls on it's face way early in the power band. And there's no way its taking advantage of that 800cfm carb with that combination.
No...sorry...not much more than about 200hp...at least not at the wheels.
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You're not hearing what I'm saying. If the engine IS that mild, it won't run with an 800 cfm carb, not when you stand on it anyway, it'll fall on it's ass. IF he has a carb that big and it's NOT bogging under acceleration, IT IS making more than 200 hp.. There's no way it's not. I've knocked on 400 hp before with a flat tappet cam and iron heads, you've just gotta know what you're doing.
Oh, I'm hearing what you're saying. I just don't necessarily agree. The nice thing about Edelbrock carbs, is that they can be set up to run on any engine. A change in metering rods and jetting is all that is needed to allow the carb to run without issue on smaller displacement, lower performing engines. So just because it's not "falling on it's ass" as you stated, does not mean the carb is being used to it's potential. Based on the other parts he's got in the engine, I don't believe it’s a matter of it being capable of using what the carb has to offer, but a matter of the carb having been detuned (if you will) enough to work with the lower performing engine.
My guess, is that this carb was bought with bigger plans for the engine in mind, that never came to fruition. Much the same way an EFI guy would buy a large volume MAF meter, big injectors and 75mm throttle body and bolt them to a stock intake with the intent of building up a deep street terror, but can't afford to build it all up at once and needs the car to run in the mean time.
As stated, only a dyno will tell for certain, but he asked for guesses and this is mine!
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I agree with Styk. If it had a good set of long tubes on it and some better ignition I'd say 260-275, but with shorties I'm gonna say 250.
Keep in mind this ain't a 302...
Keep in mind this ain't a 302...
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I'm perfectly aware carbs can be detuned, Brian, but from what the OP described, he bough an Edelbrock Performer package for that engine, and the carb would come matched to the engine. One does not match an 800 cfm carb with a combo to make 200 hp.... I'm betting Vic Edelbrock knows that too...
just becuase its a matched carb for to the combo doesnt mean its going to make power. we just put a new 1250 QFX on the race car and have changed every air bleed jet and squirter on it to make more power then the old 1150...
Lol....I'm personally thinking 250. Gt heads, intake, 750* carb bbk shortys and exhaust...the motor does run rich with the floats set correctly and the jets that came with the carb, but when its leaned out it definitely pulls strong...I'm not trying to make this a 10 second car or anything, but I would like it to make more power then it does now. Pistons are low compression slugs and they are 5.0 heads, but I was thinking about maybe just putting a turbo onto it...
First off...please show me where the OP stated he bought an Edelbrock Performer package for the engine. I see where he stated it was pulled from an old Bronco and that it "has" an Edelbrock carb, intake and cam....but there's no indication it wasn't installed by the previous owner.
Second....please. I can count on both hands and feet how many people I've met that have bought missmatched engine components thinking they'll work wonders on an engine. How many single plane high rise intake and 750cfm carb combo's have you seen guys bolt to stock 302's?.....be honest now! Hell, I had a buddy in highschool that bolted a Holley 750 Double Pumper to the stock 283ci, 195hp V8 in his '66 Chevelle. You can imagine how it ran. No stock iron headed 351W will utilize an 800cfm carburetor...I don't care what intake and cam you match it with. A 500-600cfm carb would provide more than enough fuel and airflow for the parts described above and probably run much better in the process.
Third....you're right, Vic Edelbrock would be most certainly be the man to know, but since there's a 99.9% chance he wasn't the previous owner, or builder of this engine, all bets are off!
Three50won
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A 351 with stock heads, low compression, performer cam, and an 800 CFM carb is not gonna make 260-275...
How do we know it isn't. The OP is stating what he "feels"...another driver might get in the car and say it's falling flat.
Folks, keep in mind that this is a very mismatched combo with a big carb on it. If it had the matching carb and heads then I'd say about 250-275. But as it is it probably is around 200-220 tops.
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The OP stated the engine was an old smog motor which to me says mid to late 70's, early 80's maybe. Those heads were what? 75-78 CC? The E7TE 5.0 ho heads(which are on the engine) are 61CC, right? I'm no 20 year old rocket scientist, but my past experience tells me this would raise the CR, and with some home porting you CAN hit 260-275, I've effin done it.
Edit: People like this cat are the ones I used to love to meet in the early 90's and late 80's when street racing was still quasi acceptable, because they'd say "You can't do that!" then, I 'd take their money.
Three50won
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And with some more compression and a Holley Systemax kit it can make blah blah blah...but that's not what we're talking about is it? SS, Where did he say anything about E7TE heads? He said the engine was out of an older low compression Bronco and they put it in an 87 Mustang. He never said anything about different heads. He said he removed the smog equipment, it has a performer cam, an 800 cfm carb, an Edelbrock intake, headers, and an exhaust.
And why are you mentioning what power level he "can" hit with some home porting? That isn't even a factor because there is no evidence that there are E7TE heads in the first place, and even if there were E7TE heads there is no evidence he did any home porting. He's asking about an older low compression 351 with the mentioned mods.
Not getting smart with you but you can't go adding stuff and saying it'll make x amount of power when the OP doesn't have that combo.
I don't profess to be a know it all. And I'll be the first person to admit when I'm wrong about something. But I usually try to refrain from saying what "can't" be done. I'll say it's unlikely or I doubt it...because people in this culture have a habit of lying about their mods anyway just to gain the upper hand and win some money. But given the combo the OP mentioned and no other variables or what ifs or maybes or you can do this or try that or anything else, I don't think this engine is making what you claim it will make.Edit: People like this cat are the ones I used to love to meet in the early 90's and late 80's when street racing was still quasi acceptable, because they'd say "You can't do that!" then, I 'd take their money.
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He said it right here:
Heads from a GT 5.0 = E7TE..
Try reading next time....You may not profess to be a know it all, but you sure talk like one..
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