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Old 04-06-2013   #1
XfireZ51
 
Join Date: May 2007
Location: Chicagoland, IL
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Default What say you, Graham?

Now that Graham has graciously joined our little group, I thought he deserved his own "stickie" thread. It would be great to immortalize some of the great insights Graham can bring to the understanding and background of the ZR-1 and LT-5 in particular.


I'll start off by asking this question.

Graham,
What did you guys do, if anything, to mitigate the "split blm" issue we run into when tuning. Seems that the tune is a compromise between left and right banks. It would be nice if they both ran more evenly. And it appears to be exacerbated, particularly at lower rpms, when using larger cams and/or having ported top end, heads etc.

So

WHAT SAY YOU, GRAHAM?
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Old 04-06-2013   #2
Tyler Townsley
 
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Default Re: What say you, Graham?

First off we need a picture!!

http://thepandatrap.com/gallery/ZR-1s/20110422133223

Tyler
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Old 04-06-2013   #3
Blue Flame Restorations
 
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Default Re: What say you, Graham?

Love that pic and my EX5023.....
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Old 04-06-2013   #4
grahambehan
 
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Default Re: What say you, Graham?

Quote:
Originally Posted by Tyler Townsley View Post
First off we need a picture!!

http://thepandatrap.com/gallery/ZR-1s/20110422133223

Tyler
Tell you what Tyler gb is not in the picture!
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Old 04-06-2013   #5
Blue Flame Restorations
 
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Default Re: What say you, Graham?

Geoff and who is the mystery man???
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Old 04-06-2013   #6
grahambehan
 
Join Date: Feb 2013
Location: New Concord Kentucky
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Default Re: What say you, Graham?

Quote:
Originally Posted by XfireZ51 View Post
Now that Graham has graciously joined our little group, I thought he deserved his own "stickie" thread. It would be great to immortalize some of the great insights Graham can bring to the understanding and background of the ZR-1 and LT-5 in particular.


I'll start off by asking this question.

Graham,
What did you guys do, if anything, to mitigate the "split blm" issue we run into when tuning. Seems that the tune is a compromise between left and right banks. It would be nice if they both ran more evenly. And it appears to be exacerbated, particularly at lower rpms, when using larger cams and/or having ported top end, heads etc.

So

WHAT SAY YOU, GRAHAM?
Really intersting, nice flag tho!
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Old 04-06-2013   #7
XfireZ51
 
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Default Re: What say you, Graham?

Quote:
Originally Posted by grahambehan View Post
Really intersting, nice flag tho!
Is this something you did not encounter?
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Old 04-06-2013   #8
grahambehan
 
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Default Re: What say you, Graham?

Quote:
Originally Posted by XfireZ51 View Post
Is this something you did not encounter?
No we did not encouter a major difference bank to bank at design release.

Graham
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Old 04-06-2013   #9
XfireZ51
 
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Default Re: What say you, Graham?

What complicates the issue is installing different injectors ie Accels, RCs, FICs. I don't suppose use of ethanol was a consideration at the time.
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1984 Corvette Z-51/4+3 SOLD
1992 Corvette ZR-1 Aqua/Gray #474 SOLD
1992 Corvette ZR-1 Black Rose/Cognac #458
2014 Honda VFR Interceptor DX
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Old 04-08-2013   #10
LancePearson
 
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Default Re: What say you, Graham?

Quote:
Originally Posted by XfireZ51 View Post
What complicates the issue is installing different injectors ie Accels, RCs, FICs. I don't suppose use of ethanol was a consideration at the time.

I nominate Ethanol as one of the bad ideas of all time in automotive terms and when used or let sit for more than a few days in any engine with a carb. especially, boats, et al. as well.
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