Set up - Page 3 - Chevelle Tech
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post #31 of 35 (permalink) Old Oct 7th, 19, 4:13 PM
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Greg.
 
Join Date: Apr 2011
Location: Ottawa, On, Canada
Posts: 5,006
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Re: Set up

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Originally Posted by 71malibuu View Post
Thank you looks like I have some work to do. I値l be getting tires this week same as yours. Also the front spring spacer is that to help bottoming out on the street? Or just to get you to the height/preload you wanted? I知 starting to think the springs and shocks I just installed did a lot more bad than good. Lost basically almost a second on et, and the part that I cannot understand is I also lost roughly 13 mph. Run on stock suspension was 11.01 @ 132. Only difference was suspension and this time I forgot to remove the air cleaner. I値l try your set up as your car obviously hooks pretty damn good. What length and spring rate on the front are you using? Thanks again for all the help.
I love the M/T ET Street S/S # 3454 295/55/15 Tires

Yes the Front Rubber 1" Spacer https://www.jegs.com/i/JEGS/555/60830/10002/-1
is under the Front Moroso Trick 250 lb Springs # 47195 https://www.jegs.com/i/Moroso/710/47195/10002/-1
as they lowered the Front of the Car too much
when the 1" Spacer was installed it Lifted the Front End of the Car by 1.25" to 1.5"

Not getting the FrontEnd up on Launch will cause the Rear Tires to Spin first instead of Hooking

SBC or BBC ?

https://www.jegs.com/i/Moroso/710/47200/10002/-1 for 68 - 72 Chevelle with BBC

BIG NOTE
I have UMI Perf Front Lower & Upper Tubular Control Arms

67 Chevelle Malibu SS Cdn
Born 283 / PG / A51
468/TH400 2,500 stall/ S60 3.70 Gs
Prev Best on M/T ET S/S #3454 street Tires/Dress 2018/05/20
60' = 1.664
1/8 = 7.532 et / 91 mph
1/4 = 11.814 et / 115 mph
NEW Best with 3,500+ Stall TC 2019/09/08
60' = 1.547
1/8 = 7.311 et / 91.76 mph
1/4 = 11.595 et / 114.28 mph


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post #32 of 35 (permalink) Old Oct 10th, 19, 9:04 PM Thread Starter
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Join Date: Oct 2018
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Installed the tires and did a few test hits near my house, I am getting an odd zig zagging feeling from 112-135 mph almost like the left tires are going faster than the right, and then the right side tires are going faster than the left. That pattern alternating very quickly. If that makes any sense at all. Also, after 10/15 hard hits my recently rebuilt rear end is starting to vibrate/howl at roughly 60/80mph at Cruz. May order a 390 gear set and rebuild it this weekend.
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post #33 of 35 (permalink) Old Oct 11th, 19, 7:37 AM
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Join Date: Dec 2005
Location: Lancaster, PA
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Re: Set up

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Originally Posted by 71malibuu View Post
Unfortunately with the long small block springs I was bottoming out the headers on the street. I needed the 550 springs to keep it streetable. I have a feeling this is just going to be temporary as I知 debating front coil overs.
550 is where your problem is. And there is no need for coil overs. Plenty of cars going fast with coil springs and shocks. My car was going low 1.40's in 60' with Moroso 250 lbs trick springs and 3 way shocks with the 10" slicks. I didn't get rid of that front suspension until I was going 9.30's and 1.28 in 60' with the big tire. Finally went 1.21 with the same spring and a Strange single adjustable front shock.
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post #34 of 35 (permalink) Old Oct 11th, 19, 4:56 PM
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Greg.
 
Join Date: Apr 2011
Location: Ottawa, On, Canada
Posts: 5,006
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Re: Set up

Quote:
Originally Posted by 71malibuu View Post
Installed the tires and did a few test hits near my house, I am getting an odd zig zagging feeling from 112-135 mph almost like the left tires are going faster than the right, and then the right side tires are going faster than the left. That pattern alternating very quickly. If that makes any sense at all. Also, after 10/15 hard hits my recently rebuilt rear end is starting to vibrate/howl at roughly 60/80mph at Cruz. May order a 390 gear set and rebuild it this weekend.
Which Tires and how much Air in them ?

The Reason for the Zig/Zag feeling or not enough or too much Air in the Tires
as the Tires are running onto Smooth or Rough patches of Pavement

67 Chevelle Malibu SS Cdn
Born 283 / PG / A51
468/TH400 2,500 stall/ S60 3.70 Gs
Prev Best on M/T ET S/S #3454 street Tires/Dress 2018/05/20
60' = 1.664
1/8 = 7.532 et / 91 mph
1/4 = 11.814 et / 115 mph
NEW Best with 3,500+ Stall TC 2019/09/08
60' = 1.547
1/8 = 7.311 et / 91.76 mph
1/4 = 11.595 et / 114.28 mph


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post #35 of 35 (permalink) Old Oct 11th, 19, 10:45 PM Thread Starter
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Join Date: Oct 2018
Posts: 126
672-3754X This tire @ 25 psi. Front tires are bf sport radials 205/60/15. Rear end is toast. I’ll be rebuilding it this weekend. I have another 3.73 gear, but I believe that I will gain a little on the 1/4 with the 3.90... I will not be spraying it until I can get reliable 150 60 foot times and a sub 11.0 et. Is that unrealistic with my set up?
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