Speaking of Z-28's; check out the new D/S record!

Jeff Lee · 04-11-2008, 12:47 AM

John Duzac sets the nw D/S record @ 10.56 with his '67 Z-28! Better yet the 123.96 MPH shows John .08 faster than the formula I use for optimum ET. Wow, that's impressive!!!
Congratulations John!

Walker4108 · 04-11-2008, 08:57 AM

Impressive to say the least.

Dan Bennett · 04-11-2008, 04:41 PM

Can I get some help from some of the experts here? Since we're talking about D/S, I've been wondering for a while how a Demon/Duster shows up nowadays in D/S and D/SA since over the years I've gotten used to seeing them in G or a class real close.

I don't have a rule book handy so that's why I'm asking what is probably a stupid question. I guess it might be a case of weight, but I never considered a Demon or Duster to be much of a heavyweight to start with. Plus, as far as I know there's only a single 340 that was used in 70 and 71.

Thanks to anyone who knows the answer.

Myron Piatek · 04-11-2008, 07:16 PM

HP factors to the '71's, which have the highest rating for Mopar 4 bbl small blocks. "Natural" class is "E" and they can adjust weight to "D" or "F". It wasn't too long ago that NHRA allowed moving to a faster class with weight removal. (Last year or two?) That's become easier over the years with lighter brakes, wheels, etc.

It's also how the '70 340 6-Pack Challenger T/A ended up in C/SA, and set the record at 10.33! They are not that heavy either.

1970 340 4bbl's have a smaller carb and the '72's lost compression and valve size.

Dan Bennett · 04-11-2008, 07:22 PM

Quote:

Originally Posted by Myron Piatek

HP factors to the '71's, which have the highest rating for Mopar 4 bbl small blocks. It's also how the '70 340 6-Pack Challenger T/A ended up in C/SA, and set the record at 10.33! They are not that heavy either.

1970 340 4bbl's have a smaller carb and the '72's lost compression and valve size.

Thanks for the answer. I really appreciate it.

John Duzac · 04-11-2008, 09:16 PM

Thanks, Jeff Lee. It would not have been possible to set the 10:56 record if it were not for the help of Rob Youngblood, from Advanced Clutch, Jim Lewis racing engines and my good friends at 21Tek. I know there are several D/S cars that can match the 10:56 ET. Records are made to be broken! Lets see how long it lasts?

s10stocker · 04-11-2008, 09:40 PM

Quote:

Originally Posted by John Duzac

Thanks, Jeff Lee. It would not have been possible to set the 10:56 record if it were not for the help of Rob Youngblood, from Advanced Clutch, Jim Lewis racing engines and my good friends at 21Tek. I know there are several D/S cars that can match the 10:56 ET. Records are made to be broken! Lets see how long it lasts?

Mr. John, one of the high points in my life will always be sharing the front page of NHRA.com with you. I hope the next time we are on the side of each other it won't be in the barn.

Jeff Lee · 04-11-2008, 11:11 PM

And sorry for our other buddy Curtis Coulter for the loss of the 10.60 record in D/S. You boys need to have a battle; little giant killer 302 up against the mighty 428!

John Duzac · 04-11-2008, 11:14 PM

Thanks George Roussel for the kind words. I enjoyed meeting you as well. Young racers like you are exactly what this sport needs. And with the work ethic you displayed at Belle Rose, it is little wonder why you qualified number ONE! Keep up the good work.

John Duzac · 04-11-2008, 11:21 PM

Jeff Lee: Several racers I know have already told me what a nice guy Curtis Coulter is. As far as towing all the way to Las Vegas, I really do not think it is in the cards. With the price of diesel, the thought scares me... I look forward to meeting Curtis in the future, I know he is a good guy. Fact is if anyone has contact with Curtis, please give him my e-mail address: jd4446@bellsouth.net. I would love to talk to him. Thanks...

04-11-2008, 12:47 AM	#1
Jeff Lee VIP Member Join Date: Jul 2007 Location: Anthem, Arizona Posts: 2,766 Likes: 0 Liked 3 Times in 3 Posts	Speaking of Z-28's; check out the new D/S record! John Duzac sets the nw D/S record @ 10.56 with his '67 Z-28! Better yet the 123.96 MPH shows John .08 faster than the formula I use for optimum ET. Wow, that's impressive!!! Congratulations John! __________________ Jeff Lee 7494 D/S '70 AMX

04-11-2008, 08:57 AM	#2
Walker4108 Member Join Date: Jan 2008 Location: Houston,TX Posts: 158 Likes: 84 Liked 0 Times in 0 Posts	Re: Speaking of Z-28's; check out the new D/S record! Impressive to say the least.

04-11-2008, 04:41 PM	#3
Dan Bennett Member Join Date: Jun 2007 Posts: 432 Likes: 812 Liked 560 Times in 130 Posts	Re: Speaking of Z-28's; check out the new D/S record! Can I get some help from some of the experts here? Since we're talking about D/S, I've been wondering for a while how a Demon/Duster shows up nowadays in D/S and D/SA since over the years I've gotten used to seeing them in G or a class real close. I don't have a rule book handy so that's why I'm asking what is probably a stupid question. I guess it might be a case of weight, but I never considered a Demon or Duster to be much of a heavyweight to start with. Plus, as far as I know there's only a single 340 that was used in 70 and 71. Thanks to anyone who knows the answer.

04-11-2008, 07:16 PM	#4
Myron Piatek VIP Member Join Date: Nov 2001 Location: Florida Posts: 1,542 Likes: 34 Liked 138 Times in 51 Posts	Re: Speaking of Z-28's; check out the new D/S record! HP factors to the '71's, which have the highest rating for Mopar 4 bbl small blocks. "Natural" class is "E" and they can adjust weight to "D" or "F". It wasn't too long ago that NHRA allowed moving to a faster class with weight removal. (Last year or two?) That's become easier over the years with lighter brakes, wheels, etc. It's also how the '70 340 6-Pack Challenger T/A ended up in C/SA, and set the record at 10.33! They are not that heavy either. 1970 340 4bbl's have a smaller carb and the '72's lost compression and valve size. __________________ LOCOMOTION Racing Last edited by Myron Piatek; 04-11-2008 at 07:27 PM.

04-11-2008, 09:16 PM	#6
John Duzac Member Join Date: May 2005 Location: Covington, La Posts: 311 Likes: 63 Liked 83 Times in 20 Posts	Re: Speaking of Z-28's; check out the new D/S record! Thanks, Jeff Lee. It would not have been possible to set the 10:56 record if it were not for the help of Rob Youngblood, from Advanced Clutch, Jim Lewis racing engines and my good friends at 21Tek. I know there are several D/S cars that can match the 10:56 ET. Records are made to be broken! Lets see how long it lasts? __________________ John Duzac D/S 4448 STK

04-11-2008, 11:11 PM	#8
Jeff Lee VIP Member Join Date: Jul 2007 Location: Anthem, Arizona Posts: 2,766 Likes: 0 Liked 3 Times in 3 Posts	Re: Speaking of Z-28's; check out the new D/S record! And sorry for our other buddy Curtis Coulter for the loss of the 10.60 record in D/S. You boys need to have a battle; little giant killer 302 up against the mighty 428! __________________ Jeff Lee 7494 D/S '70 AMX

04-11-2008, 11:14 PM	#9
John Duzac Member Join Date: May 2005 Location: Covington, La Posts: 311 Likes: 63 Liked 83 Times in 20 Posts	Re: Speaking of Z-28's; check out the new D/S record! Thanks George Roussel for the kind words. I enjoyed meeting you as well. Young racers like you are exactly what this sport needs. And with the work ethic you displayed at Belle Rose, it is little wonder why you qualified number ONE! Keep up the good work. __________________ John Duzac D/S 4448 STK

04-11-2008, 11:21 PM	#10
John Duzac Member Join Date: May 2005 Location: Covington, La Posts: 311 Likes: 63 Liked 83 Times in 20 Posts	Re: Speaking of Z-28's; check out the new D/S record! Jeff Lee: Several racers I know have already told me what a nice guy Curtis Coulter is. As far as towing all the way to Las Vegas, I really do not think it is in the cards. With the price of diesel, the thought scares me... I look forward to meeting Curtis in the future, I know he is a good guy. Fact is if anyone has contact with Curtis, please give him my e-mail address: jd4446@bellsouth.net. I would love to talk to him. Thanks... __________________ John Duzac D/S 4448 STK