1979 GMC CobraJet

[Boaterguy221]

We had one if those. And it was an awesome boat. It was just to small. So we got a 1992 221 four winns liberator.

[xXDakillUpXx]

thats what i call a boat!

[corvettekid7684]

4700 rpm & 68 mph according to handheld gps

[TheCHEVYGUY95]

How many RPM's were you running right there?

[corvettekid7684]

What do you mean? Life jackets or hull flotation?? It's all there, just not visible in video..

[FriscoJarretts]

Very nice!!! Where is all the Coast Guard required flotation? :)

[elevatormechanic]

sweeeet

[TheWhalerfan]

Well that looks a hell of a lot more fun than playing with the 40 hp outboard I am used to.

[timvandrunen]

best hole shot ever

[tdurden664]

fuck ya!

[corvettekid7684]

I've GPS'd it more than that (over 70), but no, it isnt a race boat...I'm not all that concerned with the top speed, it's the getting there that's fun. Keep in mind this is only a 16ft boat... ;)

[huntersmith1989]

its a 60 to 65 mph boat

to heavy for anything else

[huntersmith1989]

it will run about 60 65 mph

[corvettekid7684]

@huntersmith1989 What will?

[huntersmith1989]

@corvettekid7684  ur boat its a 60 65 maybe if ur lucky 70mph im not puttin it down i have a cp (california performance) light lay up and it runs79mph at a quarter mile at the drags it takes a light hull to go faster not a hull with a wind sheild

[13snoopy]

There's no such thing as a GMC Cobra Jet.

FORD made the Cobra Jet engine, not GMC, dumby.

[corvettekid7684]

@13snoopy The boat mfg is GMC (General Marine Corp), boat model is a CobraJet...dumby

[MiniTruckin05]

454 motor?

[corvettekid7684]

454 bored .060 over

[SuperMuise]

hard to tell but it looks like a big block....?

[corvettekid7684]

Yup. Chevy Big Block, 468 cid

[SuperMuise]

Ive got a 468 (454 thats been machined) pushin about 550hp on propane in my ol mans 76 GMC. Video will be up here soon

[ood2112]

Thats a bad ass boat but now 2years later does it still run that good?

[corvettekid7684]

Runs even better now!! A few changes were made though ;)

[greywolf1755]

Although It's hard to tell with the wind noise it sounds like the motor is crapping out on the top end, or maybe It's hitting the rev limiter?

[corvettekid7684]

It's definately the wind noise. Doesnt sound like that in person...

[corvettekid7684]

Thanks!! It's definately fun!! For optimum speed, the rooster tail should only be about 1 or 2 ft high. Some guys like to have really high roosters basically to just to show off. Many jetboats do not even have any trim adjustment. Others are modified just to make a big rooster tail. Mine is factory trim...

[Preytor13]

wow, sweet boat man

I hope u have lots of fun with it

I just have one question, when a jet boat is going fast, does it have to have a huge rooster tail on the end? Or is that just preference, and it's possible to maintain speed with the trim down?

[knwrthman]

Nice

[assphincter]

Jet boats SUCK............a shit load of fuel. Buy a prop boat. Go faster and use less fuel. Makes sense don't it?

[corvettekid7684]

Actually, mine uses less fuel than my dad's 6 cylinder prop boat, and mine is much much faster. The acceleration of a jet is the fun part. Beats a prop hands down!! And the cornering is amazing...

I wouldnt mind trying out a V-drive sometime too though...

[galaxyscreen]

Silly rabbit.

[turtlemann14]

yep, i think it would be our boat...

(besides the fact that it is not running)

my dad has a (i think) 18' with a 289 hypo in it(propeller driven). it sounds great but i have not gotten to see it run on the water

[kurohyou07]

I have an '06 Boss Hoss motorcycle with a 502ci big block, with a Demon 750 double pumper carb... sounds just like your baby... only on land. I put out a rooster-tail of smoke off the back wheel. It's as crazy as what YOU have going on. Niiiiiice!

[4Q3W2E1R]

dayum son, kick ass sound

[max01978]

nice ride!! thanks for showing it!! i have an 86 cimmerron that has the exact same hull design, what engine have you got and what carb are you using? i'm working on trying to get a set up that my engine is happy with. thanks for any advice you can give!!

[corvettekid7684]

I'm using a Holley 750 cfm marine carb. There are many variables to getting these setup correctly. I would need more info for specifics...

[jay64stang]

wow that thing is sweet! Crazy rooster tail

[crackdown777]

I want it!!

[jigibao]

nice...

[BigAgitator]

Sexy motor, man!!! Nice response time on that pumper.

Glad I watched

[berlinolliberlin]

bsbnerzneerznrn

[fortmcmurraycash]

wow that motor got up on step fast man...what kind of pump are you using?

[corvettekid7684]

Thanks!! Yea, she's pretty responsive :) it's just the stock Berk JF pump with a fresh rebuild and "Ultimate Wear Ring"