Rkreigh

they made some racing lt5s for lotus race cars and they sound funky the lt5 stock doesn't have a flat crank

what makes the unique sound, why the beast clearing it's throat howling at the moon

gmonsen

The LT5 does not have a flat plane crank. If it did have a flat plane crank,. it certainly would affect the sound. A lot. FPC motors have a ripping sound at high rpm that you hear so often with the Ferrari V8's, which do use a flat plane crank. Also, I know there are a few guys who have modified their LT5's with a FPC and they sound even more awesome to me than stock.

A lot of the sound is the intake sound combined with all the valve train. That creates a very complex sound, rather than the simple big v8 sound more typical of US v8's.

G

TURNMASTER

bad information.

gmonsen

^ What's bad information?

Paul Workman

"Bad" info would be the flat plane crank as it relates to the unique sound of the standard ZR-1/LT5 - which does NOT have a flat plane crank (only a few special project race prepped LT5 Lotus engines did.)

As for the unique sound, that sound you hear when you hammer the LT5 in a tunnel, for example, has NOTHING to do with the chains, I garronetee!!

Zrxmax

Is that the sound you were talking about ? Just as it passes the camera.

ARGH

this is the sound!

@ 7:43

@3:37

@0:04

@0:07

@5:11

@0:29

ARGH

its the reason why no matter how much i like the new c7 i just cannot get away from the LT5!

c7 = awsome new-age car with an average-sounding engine.

LT5 = outdated car but with a legendary engine.

gmonsen

Paul... Ah. Right. I did hear a ZR1 with a flat plane crank and it was nearly enough to make me think about an engine build.

G

Tom400CFI

This sound....especially right as it finishes up the burn out....DELICIOUS!! ...and I'm not hearing any "timing chains" or "valve train" there. Pure, unbridled wicked, exhaust.

ARGH

that is just muffler noise.

Tom400CFI

That is exactly right. That is glorious, wicked, awesome, "muffler" (exhaust) sound.

The first two vids you posted...all I heard was transmission noise. Sounded about exactly like my stock '92 LT1. 0:00 - 0:40...



If you're looking for what makes it sound like a "jet engine", that would be the transmission...which is the same, pushrod powered or otherwise.

.

gmonsen

I think the sound is largely, maybe 95% the combination of intakes and exhaust. Of course within those sounds, you do hear a complexity that is likely a result of the 4 valves and cams and whatever affecting and just coming through the exhaust.

ARGH

really, that is just the ZF6 speed noise?? maybe he has an LT5 engine swap

ARGH

well i'l be damned! it IS the gear whine! lol! and all this time i thought wrong

i guess this thread can be deleted. i feel embarrassed now....

edit; just saw more vids of c4 -speed and they emmit the same gear whine.

Tom400CFI

That "he" is me. That's my car.

ARGH

i appreciated your input

Paul Workman

Nope. That was more like typical NASCAR sound of a pushrod motor.

Dominic Sorresso

Mr. ARGH,

Here's the sound you were looking for

BlackAndSaddle

Here's the truth. I consulted Engineers and Designers both regarding the issue.
The LT5 burns angels and converts them to demons. The noise you hear is their lament.
You can trust me, I am a Professional.

In truth the sound is simply the resonance of the valves releasing exhaust. Like an instrument every engine has a frequency at which the pressure is released unique to each engine. Exhaust systems can mitigate or accentuate the resonant frequency.

But it's intoxicating nonetheless.