More C8R specs DOHC Flat Plane Crank. - ZR-1 Net Registry Forums

Karl · 10-11-2019

https://www.yahoo.com/finance/news/c...185500425.html

I saw the base c8 this past weekend on the streets of Chicago and I must admit the eye candy appeal wasn't there. Maybe it needs to grow on me.

lfalzarano · 10-12-2019

Great read!

Sent from my iPhone using ZR-1 Net Registry

Mystic ZR-1 · 10-12-2019

Most of the current articles on this are
making a bigger deal out of the flat plane crank
than DOHC???

Karl · 10-12-2019

Quote:

Originally Posted by Mystic ZR-1

Most of the current articles on this are
making a bigger deal out of the flat plane crank
than DOHC???

Yes the flat plane crank seems to be well discussed.

The RPM limits are much higher but to my understanding at a cost to overall reliability?

Has anyone seen the latest Hovemann Hillclimb video?

9000rpm LT5 sounds amazing with the flat plane crank!

https://www.youtube.com/watch?v=KiTBRyGUy0o

Hib Halverson · 10-19-2019

Quote:

Originally Posted by Karl

Yes the flat plane crank seems to be well discussed.

The RPM limits are much higher but to my understanding at a cost to overall reliability?

Has anyone seen the latest Hovemann Hillclimb video?

9000rpm LT5 sounds amazing with the flat plane crank!

https://www.youtube.com/watch?v=KiTBRyGUy0o

The LT5 in that Opel does not have a flat crank. All flat crank V8s sound like four-cylinders and the difference is obvious, unless, of course, you're deaf. The reason the sound is different is firing impulses are coming every 180° rather than every 90°. That's the same as a 4-cyl.

Karl · 10-19-2019

Quote:

Originally Posted by Hib Halverson

The LT5 in that Opel does not have a flat crank. All flat crank V8s sound like four-cylinders and the difference is obvious, unless, of course, you're deaf. The reason the sound is different is firing impulses are coming every 180° rather than every 90°. That's the same as a 4-cyl.

http://www.zr1.net/forum/showthread.php?t=26491

grahambehan · 10-19-2019

Hib, you forgot the other half of the v8.

An example of a flat plane firing order is
14527638
Or two four cylinders firing
1342

Graham

Hib Halverson · 10-25-2019

Quote:

Originally Posted by grahambehan

Hib, you forgot the other half of the v8.

An example of a flat plane firing order is
14527638
Or two four cylinders firing
1342

Graham

Ooops, yeah, I got that, but the exhaust noise sounds like a four.

That LT5-powered Opel sounds like a Cup Car to me, ie: a 90° crank.

lfalzarano · 10-22-2019

GM is sandbagging on the RWH on the base C8....

The first dyno test

https://www.motortrend.com/news/2020...c8-power-dyno/

Sent from my iPhone using ZR-1 Net Registry

Hib Halverson · 10-25-2019

Quote:

Originally Posted by lfalzarano

GM is sandbagging on the RWH on the base C8....

The first dyno test

https://www.motortrend.com/news/2020...c8-power-dyno/

Sent from my iPhone using ZR-1 Net Registry

I kinda doubt GM is sandbagging. I think MT's dyno testing is screwy. Either way, I have a meeting with Jordan Lee in Michigan week after next and that's on my list of stuff to ask him about.

10-11-2019	#1
Karl Join Date: May 2013 Location: Chicago Posts: 980	More C8R specs DOHC Flat Plane Crank. https://www.yahoo.com/finance/news/c...185500425.html I saw the base c8 this past weekend on the streets of Chicago and I must admit the eye candy appeal wasn't there. Maybe it needs to grow on me. __________________ 1993 ZR-1 #211 Yellow On Beige Beast #2 1992 ZR-1 #427 Black On Black Sold 1985 L98 Blue On Blue Sold

10-12-2019	#2
lfalzarano Join Date: Feb 2011 Location: Clayton, North Carolina Posts: 1,133	Re: More C8R specs DOHC Flat Plane Crank. Great read! Sent from my iPhone using ZR-1 Net Registry __________________ Lou[COLOR="Red"][B][SIZE="4"][/SIZE][/B][/COLOR]

10-12-2019	#3
Mystic ZR-1 Join Date: Jan 2010 Location: Mystic CT Posts: 2,633	Re: More C8R specs DOHC Flat Plane Crank. Most of the current articles on this are making a bigger deal out of the flat plane crank than DOHC??? Last edited by Mystic ZR-1; 10-12-2019 at 11:15 AM.

10-19-2019	#7
grahambehan Join Date: Feb 2013 Location: New Concord Kentucky Posts: 181	Re: More C8R specs DOHC Flat Plane Crank. Hib, you forgot the other half of the v8. An example of a flat plane firing order is 14527638 Or two four cylinders firing 1342 Graham

10-22-2019	#9
lfalzarano Join Date: Feb 2011 Location: Clayton, North Carolina Posts: 1,133	More C8R specs DOHC Flat Plane Crank. GM is sandbagging on the RWH on the base C8.... The first dyno test https://www.motortrend.com/news/2020...c8-power-dyno/ Sent from my iPhone using ZR-1 Net Registry __________________ Lou[COLOR="Red"][B][SIZE="4"][/SIZE][/B][/COLOR]