Interesting read about engine basics/designs - ZR-1 Net Registry Forums

Aurora40 · 01-14-2006

I thought it was really informative and interesting:

http://members.aol.com/aurora402002/...ine_basics.pdf

tomtom72 · 01-18-2006

Thanks Bob that was indeed interesting. I guess saftey is why the stock fuel map is rich. I guess when tuners take fuel out of the mapping they are relying on false knock signals being there as they monitor EGT and maybe that "wide band O2" thing to tell them there is too much fuel and the knock sensor programing has too low a threshold for knock events?

Man the creativity that tuners use is amazing.

Aurora40 · 01-22-2006

Glad you enjoyed it. I thought it was very interesting. Obviously just reading an article doesn't make me close to an expert, but it does make the LT5 seem more impressive.

I'd guess it must have a reasonably fast burn chamber, as it has both high compression, and low max timing advance. I believe the factory max is like 23 degrees BTDC. And I believe the car can be run on 87 octane (according to the owners manual), though I'd imagine it is not optimized for that.

Pretty cool stuff.

Though I also own an Aurora with the 2nd generation of Northstar/Premium V8 architecture, so I found the specific references to the changes made to be interesting.

01-14-2006	#1
Aurora40 Join Date: May 2005 Location: Leesburg, VA Posts: 2,713	Interesting read about engine basics/designs I thought it was really informative and interesting: http://members.aol.com/aurora402002/...ine_basics.pdf __________________ Bob Saveland Former owner of #2517 [IMG]http://a.random-image.net/aurora40/vette.jpg[/img]

01-18-2006	#2
tomtom72 Join Date: Dec 2004 Location: Jacksonville, FL USA Posts: 4,645	Re: Interesting read about engine basics/designs Thanks Bob that was indeed interesting. I guess saftey is why the stock fuel map is rich. I guess when tuners take fuel out of the mapping they are relying on false knock signals being there as they monitor EGT and maybe that "wide band O2" thing to tell them there is too much fuel and the knock sensor programing has too low a threshold for knock events? Man the creativity that tuners use is amazing. __________________ 1990 ZR-1, Black/grey, #2233, stock. ZR-1 Net Reg Founding Member #316 & NCM member

01-22-2006	#3
Aurora40 Join Date: May 2005 Location: Leesburg, VA Posts: 2,713	Re: Interesting read about engine basics/designs Glad you enjoyed it. I thought it was very interesting. Obviously just reading an article doesn't make me close to an expert, but it does make the LT5 seem more impressive. I'd guess it must have a reasonably fast burn chamber, as it has both high compression, and low max timing advance. I believe the factory max is like 23 degrees BTDC. And I believe the car can be run on 87 octane (according to the owners manual), though I'd imagine it is not optimized for that. Pretty cool stuff. Though I also own an Aurora with the 2nd generation of Northstar/Premium V8 architecture, so I found the specific references to the changes made to be interesting. __________________ Bob Saveland Former owner of #2517 [IMG]http://a.random-image.net/aurora40/vette.jpg[/img]