Before everyone runs to their keyboard to tell me that there is more power to be had or a bigger cam would make more power, let me say, "Of course it would!" But trying to find out the capability of these heads was not the intent of this build. This engine is a street engine, going in a street car, running on pump gas. The intent of the build wasn't meant to hit 10,000 rpm, or try to make as much hp as we possibly could. Also keep in mind that these are the *street* heads with small valves. We will explore the capability of the race heads with another engine.
Nothing sounds as good as a fast revving small block Ford, no matter what heads are on it. Just from 50 years of experience I can tell you hit that ultra rare engine build right in the sweet spot. The numbers backing it up proved it. Great job, and thank you for sharing a Holy Grail build.
That’s impressive. I made numbers similar to that at the wheel with a Gen3 Coyote with long tubes peaking at 390@7000 rpm in a ‘66 Mustang 2+2. The tunnel port 302 was always an enigma, appreciate the content!
I don’t think there’s any manufacturer, especially European where they are using engines designed in the 1960s that are still competitive today in all forms of racing. NASCAR engines are basically usually the 351 Cleveland design engines made in the late 1960s today. Someone built a Cobra replica and they used one of these engines in the car and it outperformed a Lamborghini around the race course. Continuation Ford GT 40s using the 427 FE can still beat exotic sports cars around the race track. Again this is 1960s design. Great engines.
I guessed in the neighborhood of 425....Dave Tatom told me he was shifting his Trans Am Tunnel Port at over 9,000 in the Burien Mercury Cougar, back in the day...
Just listened thru headphones, sounds great 👍 i didnt hit the hp/tq estimates, i was high, but that reflects my zero TP experience! Looking at the flow figures V's the hp it made I over estimated the TP intake port efficiency, they are obviously not as good as i though they may be. That said, its great and is unique so it gets 10/10, Very nice 💪💪
Wow I'm bummed. I was expecting at least 450 hp. I mean Tunnel port heads are designed for hi rpms and should make a ton of hp. Maybe a beefier cam would help?
Wrong head for application then in my opinion. Tunnel ports were never designed or intended for street use they were for Trans am racing to the best recollection I have. Just seems like a waste of potential. But not my money not my decision to make.
There were two tunnel port SBF heads. One was a street head with stud rockers and small valves (the heads that were used on this build) and a race head with larger valves and shaft rockers. This one was always meant to be a street engine, as I stated in the very first video. As for being a waste of potential, then I would point you to the gentleman that owns the car/engine. Everyone has opinions, right?
That would be an insane number for such a small cubic inch engine n/a. I happen to have a 306 that makes a hair over 600 but it's a 14:1 tunnel rammed 270/280@.050" extremely worked over 1970 Boss engine. Lots of head work. The engine in this video seemed to do alright for being so mild.
A stock Boss 351C with a single 715 cfm carb, flat tappet .500 lift cam, and 11:1 compression was around the same horsepower with slightly more torque.
Love to see those heads on a tall deck, cubes around 408 and see what kind of numbers that engine would put out with those "tunnel ports". 👍 I guessed 430hp on that engine. I was a little over zealous on hp for an engine that small but still pretty impressive. The sound was amazing! I watched it a few times. Good job! 👍🏁
Why 7,000rpm, why hydraulic cam? What a waste! Those ports are designed for 10,000rpm. You took a screaming race engine and turned it into a farm tractor. Imagine a new four bolt Dart block with siamese bores and a solid roller cam and 13:1 compression. You built a street version. Ford had planned two versions of the T.P., the street version was rated at 240hp @ 5000
Those ports were not designed for 10000 rpm. These were the street heads, not the race heads. Find out a little information before you spew..... Everybody's an expert, right?
Before everyone runs to their keyboard to tell me that there is more power to be had or a bigger cam would make more power, let me say, "Of course it would!" But trying to find out the capability of these heads was not the intent of this build. This engine is a street engine, going in a street car, running on pump gas. The intent of the build wasn't meant to hit 10,000 rpm, or try to make as much hp as we possibly could. Also keep in mind that these are the *street* heads with small valves. We will explore the capability of the race heads with another engine.
And what a strong little street engine it absolutely will be. Cant knock it 💪
this was my prediction on the video you had us guessing on. 🤝 🤜Lets go 386hp@6200 366tq@3800🤛
So what's this going in? I see it has a flywheel...hopefully something lightweight, with decent gears, and a loud exhaust! 😎
Nothing sounds as good as a fast revving small block Ford, no matter what heads are on it. Just from 50 years of experience I can tell you hit that ultra rare engine build right in the sweet spot. The numbers backing it up proved it. Great job, and thank you for sharing a Holy Grail build.
I wouldn't say nothing..........a FE or high reving Cleveland sounds mighty fine too.
That’s impressive. I made numbers similar to that at the wheel with a Gen3 Coyote with long tubes peaking at 390@7000 rpm in a ‘66 Mustang 2+2. The tunnel port 302 was always an enigma, appreciate the content!
That is correct, the same happens with 4 webber side or down drafts.Also with Hilbourn eight stack injectors .
Boy it does sound good!
I guessed 364 hp so I win a coke that I have to buy myself😄
Another nice engine Brent. Keep ‘em coming
Another great build you've done here Brent. My guess was a tough higher 415hp/388tq.
Love the 302 engine they have always been a happy motor...dang it I was gonna say 388hp keep up the good work man.
I was waiting for that engine scream as it got into its power bulge! What a treat! Great job Brent!
good lookin little motor! My guess I believe was 390 hp, pretty close!
i love how big and bulky the intake manifold is lol i wonder what the runners look like
Wow I'm surprised how tame she sounds at idle. Nice job.
I guessed 400-425 …my original thought was 350 hp but knowing much about tunnel ports I figured they would have been a lot better..
That is a awesome engine
Great little street engine Brent
Sounds Super Smooth 👌
I don’t think there’s any manufacturer, especially European where they are using engines designed in the 1960s that are still competitive today in all forms of racing. NASCAR engines are basically usually the 351 Cleveland design engines made in the late 1960s today. Someone built a Cobra replica and they used one of these engines in the car and it outperformed a Lamborghini around the race course. Continuation Ford GT 40s using the 427 FE can still beat exotic sports cars around the race track. Again this is 1960s design. Great engines.
For the tiny cam it did pretty damn good. Good job.
That thing will be a blast in a light weight car blasting thru the desert.
What did those heads want for timing ? Wicked little motor !
35°
my guessing was close haha.. excellent job! congratulations!
I guessed in the neighborhood of 425....Dave Tatom told me he was shifting his Trans Am Tunnel Port at over 9,000 in the Burien Mercury Cougar, back in the day...
Just listened thru headphones, sounds great 👍 i didnt hit the hp/tq estimates, i was high, but that reflects my zero TP experience! Looking at the flow figures V's the hp it made I over estimated the TP intake port efficiency, they are obviously not as good as i though they may be. That said, its great and is unique so it gets 10/10, Very nice 💪💪
You can actually hear were it really started pulling!! AWSOME!!!!!!!!!
Strong vintage 302! What size Holley carbs and were the carb spacers 4 hole to match 4 hole intake plenum?
Hi Brent. can you go through the predictions and let us know who guessed closest??
Are those the heads that ford was ceveloping for trans am?which flrd wethe Cleveland engine? 4:58
I missed where you stated can lift and compression ratio?
What kind of oil pan did you use?
Wow I'm bummed. I was expecting at least 450 hp. I mean Tunnel port heads are designed for hi rpms and should make a ton of hp. Maybe a beefier cam would help?
It was a street engine from the beginning. Street engines and beefier cams don't go hand in hand.
13 cubic inches is 13 cubic inches and a longer stroke will make it idle smoother and quiker piston speed
Nice job
nice!
I was close, I guessed 375hp.
I guessed 395 HP....just a little optimistic on my part.
Nice !
Why not put a solid roller and bigger carbs on to let those heads breathe like they were designed to up at 10-11k rpm
Street engine......nothing streetable about 10k rpm LOL
Wrong head for application then in my opinion. Tunnel ports were never designed or intended for street use they were for Trans am racing to the best recollection I have. Just seems like a waste of potential. But not my money not my decision to make.
There were two tunnel port SBF heads. One was a street head with stud rockers and small valves (the heads that were used on this build) and a race head with larger valves and shaft rockers. This one was always meant to be a street engine, as I stated in the very first video. As for being a waste of potential, then I would point you to the gentleman that owns the car/engine. Everyone has opinions, right?
That's insane!!!!.....🤪
@@todddrake1212 I dont think its a waste. This guy wanted to pay, so now he's got some bragging rights for his sweet ride.
I would expected something like this to be 600HP +.
Why?
That would be an insane number for such a small cubic inch engine n/a. I happen to have a 306 that makes a hair over 600 but it's a 14:1 tunnel rammed 270/280@.050" extremely worked over 1970 Boss engine. Lots of head work. The engine in this video seemed to do alright for being so mild.
Remember, this thing made more power than a stock 351 cleveland.
A stock Boss 351C with a single 715 cfm carb, flat tappet .500 lift cam, and 11:1 compression was around the same horsepower with slightly more torque.
Love to see those heads on a tall deck, cubes around 408 and see what kind of numbers that engine would put out with those "tunnel ports". 👍
I guessed 430hp on that engine. I was a little over zealous on hp for an engine that small but still pretty impressive. The sound was amazing! I watched it a few times. Good job! 👍🏁
Hmm..I guessed 420 hp 🤔
Why 7,000rpm, why hydraulic cam? What a waste! Those ports are designed for 10,000rpm.
You took a screaming race engine and turned it into a farm tractor.
Imagine a new four bolt Dart block with siamese bores and a solid roller cam and 13:1 compression.
You built a street version.
Ford had planned two versions of the T.P., the street version was rated at 240hp @ 5000
Those ports were not designed for 10000 rpm. These were the street heads, not the race heads. Find out a little information before you spew..... Everybody's an expert, right?