How much hp can a built NA motor make?

[Suzuki Squared]

Hey everyone!

Does anybody know how much horsepower a naturally aspirated built Hayabusa can make? Forged rods, pistons, springs, cams, bigger injectors. All that fun stuff without having to boost it.

If any of you na built motor guys are out there, would you mind telling me the kind of numbers you’re pushing?

I’m looking to push out close to 400hp. Preferably without a turbo, though I know it will definitely take me there with one.

Just curious to see if this is even possible, and if so, somewhat reliable.

Thanks guys!

[Hayabusa Wannabe]

Have you referenced Carpenter? It seems that they push under 300 hp.

Carpenter Racing

[sixpack577]

You'll Never get 400hp, or anywhere even close without a turbo or sc.

[ottafish]

The most I’ve seen NA is about 270 or so at the wheels

[bigoltool]

Youre talking NHRA Prostock power level. Those are NA mountain motors!

[Suzuki Squared]

You'll Never get 400hp, or anywhere even close without a turbo or sc.

I figured as much honestly. Though it didn’t hurt to ask and find out. Already had a turbo kit, but just wanted to see. Cheers!

[Suzuki Squared]

Have you referenced Carpenter? It seems that they push under 300 hp.

Carpenter Racing

Just checked it out, thank you!

[Suzuki Squared]

The most I’ve seen NA is about 270 or so at the wheels

That’s what I’ve been seeing as well, thanks for the input!

[Suzuki Squared]

Youre talking NHRA Prostock power level. Those are NA mountain motors!

Honestly though . At that point with the price of those things might as well turbo bullet proof one.

[mark3evo]

go Turbo much more reliable, with NA monster motors requite monster crank , excessive piston side loads

and will cost a small fortune

[michael parris heuberger]

go Turbo much more reliable, with NA monster motors requite monster crank , excessive piston side loads

and will cost a small fortune

Hi. If I count the turbo trans and clutch I am over $28,000.00 in my motor.

[mark3evo]

Hi. If I count the turbo trans and clutch I am over $28,000.00 in my motor.

Wow

But you can get stage 2 which makes 400 hp for less

[michael parris heuberger]

Wow

But you can get stage 2 which makes 400 hp for less

Hi. I have a Garrett ,G42-1200c turbo with nitrous that should make 800 to 1000HP on VP M1 and about 800 on VP C16 and 400 HP on pump 93. The bike will be street driven.

[Tony Nitrous]

Old Skool builds like the 1900cc Star Racing n/a “MonStar” motors make up around 400hp so it’s not entirely impossible.

However…. You’re going to be throwing a lot of the motor in the bin, throwing a lot of money at very trick bits and development, and ending up with a very serious race motor with short life and very high maintainence schedule.

If you want to write some blank cheques I’d bet on 400 ponys being possible but not a route many folk would want to take.

[Tony Nitrous]

You'll Never get 400hp, or anywhere even close without a turbo or sc.

It’s possible, but yes, I agree you won’t see those numbers if you want it to be anything other than a full-Monty drag bike or dyno shootout bike.

[bigoltool]

It’s possible, but yes, I agree you won’t see those numbers if you want it to be anything other than a full-Monty drag bike or dyno shootout bike.

View attachment 1653441

$$$$$

[sixpack577]

It’s possible, but yes, I agree you won’t see those numbers if you want it to be anything other than a full-Monty drag bike or dyno shootout bike.

View attachment 1653441

Awesome
I wonder how streetable that is?
Should I even ask what it costs?
And if there are Any parts of that engine that aren't aftermarket? lol

[Tony Nitrous]

Awesome
I wonder how streetable that is?
Should I even ask what it costs?
And if there are Any parts of that engine that aren't aftermarket? lol

I think it was dropped from sale a while back. It was a very expensive, very serious drag bike engine. Just showing that 400 ponys from a normaly aspirated bike engine isn’t impossible. It was a brand new billet top end but used factory cases and some other stock parts in the bottom end.
I’d imagine it was a VERY long way from being streetable.

I found it very interesting, but I can’t imagine you’d get anywhere near those numbers and still have a useable streetbike.

[michael parris heuberger]

I think it was dropped from sale a while back. It was a very expensive, very serious drag bike engine. Just showing that 400 ponys from a normaly aspirated bike engine isn’t impossible. It was a brand new billet top end but used factory cases and some other stock parts in the bottom end.
I’d imagine it was a VERY long way from being streetable.

I found it very interesting, but I can’t imagine you’d get anywhere near those numbers and still have a useable streetbike.

Hi. It is a dry block so 30 sec of run time? Maybe.