Such thing as a high revving V8 crate engine?

[Atheus]

Originally posted by: GTaudiophile
The Ferrari F430's V8 can rev that high.

Yep, 4.3 liter V8, 490 hp @ 8500 rpm. Not many that go that high.

 

[Kalvin00]

Get an engine from a nascar race team..

(353?) small block V8, 9000-9500 RPM redline...800 HP...

 

[GagHalfrunt]

You can find 8000rpm+ crate motors, but they're few and far between. You have to look for a more modern design with overhead cams. Most crate motors are old-school Ford and Chevy pushrod designs and pushrod engines can't get much beyond 6,500rpm without some VERY expensive parts and some incredibly tight tolerances. Find something based on the newer DOHC V8's

 

[Bullhonkie]

There's also the 4.2L in the new Audi RS4. Redline is at 8250rpm and IIRC 90% of peak torque is available by 2000rpm or so.

 

[trmiv]

Originally posted by: sling
I've heard of people making a 383 stroker and using the left over small block 400 and 350 crankshaft in roundy round high rev cars. I think I have that right, 350 block + 400 crank = high torque, 400 block + 350 crank = high rpm. Do some looking around on that, I bet there's more too it than just a crank shaft swap, but that's the just of it.

I don't know if that would translate to 8k rpm either.

400 block with a 350 crank is a 377. A 350 block with a 400 crank is a 383 "stroker."

 

[boggsie]

Originally posted by: Eli
LOL, I'm well aware of how difficult it is guys. It's certainly not impossible though.

Why 8k?... Because it would be unique, and it woud sound badass.

Chevy? 350? Usage?.... In my truck? Or maybe a 240Z?

Maybe I should have said "turn-key" instead of crate. Are there any engine builders that offer them for sale?

I would argue that it isn't even that difficult ... just relatively expensive.

GM LS7 7000 rpm

http://www.corvettemuseum.com/specs/2006/LS7.shtml

 

[Krazefinn]

You also could look at the 302 or 283, both 3" stroke. With lighweight pistons/rods and pins, as well as appropriate valvetrain, you could....I have a barely streetable 327 in an old elcamino that spins to 8500. Sounds wicked that high...

 

[SampSon]

Yea they exist, but they are expensive.

 

[Eli]

Originally posted by: Krazefinn
You also could look at the 302 or 283, both 3" stroke. With lighweight pistons/rods and pins, as well as appropriate valvetrain, you could....I have a barely streetable 327 in an old elcamino that spins to 8500. Sounds wicked that high...

:thumbsup:

 

[imported_sling]

Originally posted by: trmiv

Originally posted by: sling
I've heard of people making a 383 stroker and using the left over small block 400 and 350 crankshaft in roundy round high rev cars. I think I have that right, 350 block + 400 crank = high torque, 400 block + 350 crank = high rpm. Do some looking around on that, I bet there's more too it than just a crank shaft swap, but that's the just of it.

I don't know if that would translate to 8k rpm either.

400 block with a 350 crank is a 377. A 350 block with a 400 crank is a 383 "stroker."

What kinda RPMs from the 377? I thought I had the swap right. I'm no engine guy. Anyways, to hell with RPMs, get a 300 Straight 6, put on an intake that holds a four barrel carb, and get some performance rods (I hair longer?) They have the tourqe to squeeze a facial expression out of Al Gore. Just don't drive it over 40mph.

 

[mAdD INDIAN]

There is in the form of a Chevy SBC. The current Z06 motor revs to just over 7000rpm, and I remember reading about a crate motor from Chevy that fit in Camaros that went to almost 8000rpm, it was 5.7L i believe.

 

[95SS]

Originally posted by: MIKEMIKE
LS7 but i dont think that is available as a crate engine.

Text

 

[Nebor]

Originally posted by: Black88GTA
Here's one...8500 RPM.

Trouble is, it comes in a very pretty and incredibly expensive crate

I was going to say the same thing.

 

[Horus]

I believe it's way, way easier for a smaller engine to have RPM's like that. I know the RX7's RPM limit is pretty damn high (8500RPM) and the S2000 has a 9000RPM redline. Also, TRD made a special 1.6L 4A-GE engine that redlined at 11000RPM...streetable.

 

[OrganizedChaos]

yes but they cost more than my house. F1 racers uses high revving baby V8s.

 

[Krazefinn]

Even beeter than a 377 destroker, is a 348...that uses a 327 large journal steel drank in a 4bolt main 400 block.
Results in 3 1/4" stroke (more rev potential than 3.5" of 350). Using Ford 300 6 cylinder rods (beefy) also helps as it makes the rod lenght to stroke more favorable.

 

[DaTT]

Do you plan on b uying one, or were you just curious?

 

[CFster]

I'm sure they could be had, but I wouldn't want one. I've seen plenty of crate motors that are botch jobs. For example the Hemi's that are available from Mopar Performance are now put together by the lowest bidder. Most guys I know that buy them (drag racers), take them out of the crate and have them sent to their engine builder, who does a complete teardown and reassembly.

I have a builder that I'd trust to build one from scratch though. As a matter of fact, he does all the time for circle track racing.

8K or 9K is pretty much the limit though - valvesprings become the limiting factor.

Thing is, I'd want that baby to be fuel injection if I was to drive it on the street. It would need to have such a crazy cam in it that it would be almost undriveable with a carb at low revs. With a lot of FI systems, it's easy to tune that fuel map to be more docile.

My 383 revs to 6500 - and it's a bitch jetting the carb right.

 

[Krazefinn]

Would definitely need a very loose converter in trans, or a manual, just to get the motor up to torque levels sufficient to move the car.
Ther'es no substitute for rpm's, if the engine can live at those speeds.

But a superior choice would be a centifugal (non-roots type) blower to make serious power, sound BAD, but still be streetable.. A smallblock to do what you want....would not be a daily driver.

 

[mc bob]

My dads v12 Jaguar XJS has a 5.3Ltr v12.
It oversquare and it safe to rev to about 8500.
The same format as a f1 car.
pistons are wider than they are higher

 

[MasterAndCommander]

Yeah...here's an F1 Cosworth V8 hitting 20,002 RPM
Text

Not exactly music to my ears. I still prefer the low RPM rumble of the old school muscle cars.

 

[Squisher]

I have no idea, but wouldn't crate engines that were set up for marine applications be low torque/high rev?

Maybe you could make some mods on it?

 

[Krazefinn]

No, marine engines need torque to get the boat on step. Too high revs will just cavitate the prop...they work better at much lower speed.
Thats why normal marine cams are not long duration or wide overlap. just moderate.