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69 dart grill block off et,mph improvement??s #1256645
06/24/12 07:23 PM
06/24/12 07:23 PM
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oregon
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greendart408 Offline OP
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I have a 69 dart that goes 138-139 plus. I am wanting to block the grill off with some plexiglas for a hopeful et, mph improvement. Does anyone that has a 67-69 dart have any real world experience with this around my speeds?? Thanks

Re: 69 dart grill block off et,mph improvement??s [Re: greendart408] #1256646
06/24/12 07:32 PM
06/24/12 07:32 PM
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Plymouth Meeting, PA
bigtimeauto Offline
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I go 175 not blocked off.


BB, TT5,Procharged 3300lb Street Car 4.79/154
Re: 69 dart grill block off et,mph improvement??s [Re: bigtimeauto] #1256647
06/24/12 07:51 PM
06/24/12 07:51 PM
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greendart408 Offline OP
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Quote:

I go 175 not blocked off.




So in your opinion there would be no improvement? ?

Re: 69 dart grill block off et,mph improvement??s [Re: greendart408] #1256648
06/24/12 08:09 PM
06/24/12 08:09 PM
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Plymouth Meeting, PA
bigtimeauto Offline
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With the way the stock hood overhangs and how high the cars sit probably your not much. I am going to put a lower air dam on mine as i think that might do something


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Re: 69 dart grill block off et,mph improvement??s [Re: greendart408] #1256649
06/25/12 05:14 AM
06/25/12 05:14 AM
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Missouri
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Quote:

I have a 69 dart that goes 138-139 plus. I am wanting to block the grill off with some plexiglas for a hopeful et, mph improvement. Does anyone that has a 67-69 dart have any real world experience with this around my speeds?? Thanks



It would be very easy to answer that for yourself, just cut you a cardboard template to cover the entire grille, make a pass without it and then duct tape the template in place for one run and you'll have your answer.

Re: 69 dart grill block off et,mph improvement??s [Re: StrokerPost] #1256650
06/25/12 10:51 AM
06/25/12 10:51 AM
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Stuttgart, Arkansas
rickseeman Offline
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Cardboard is not strong enough. Use something that won't give. I bought a hemi dart from a guy in 1977. He ran SS and M/P with it. When he ran MP he had a clear piece of plexiglass behind the grill.


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Re: 69 dart grill block off et,mph improvement??s [Re: rickseeman] #1256651
06/25/12 12:18 PM
06/25/12 12:18 PM
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Brookeville, Md
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i'm making a set of plexi-glass inserts for my grill. I'd think and it was pposted here a while ago that if you are going over 100 in the 1/4 blocking off the grill helps. I'm also going to run a 69 SS chin spoiler to keep the air clean under the car. It's worth a try.


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Coming soon!!!!
Re: 69 dart grill block off et,mph improvement??s [Re: Mr.Yuck] #1256652
06/26/12 01:53 AM
06/26/12 01:53 AM
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aotearoa
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no changes to the motor, i went from 139 mph max trap to 142 mph from removing the 6 pak n grille & installing a cowl n flat panel.
before...


after....

ET went from 9.57 best to 9.42 best. run lots of 9.4's last season, the season before was a lot of low 9.6's

Last edited by rebel; 06/26/12 02:00 AM.
Re: 69 dart grill block off et,mph improvement??s [Re: rebel] #1256653
06/26/12 05:40 PM
06/26/12 05:40 PM
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SO. CAL.
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COOL CAR rebel.... I like it!

Re: 69 dart grill block off et,mph improvement??s [Re: 70blackfish] #1256654
06/27/12 03:25 AM
06/27/12 03:25 AM
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aotearoa
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Quote:

COOL CAR rebel.... I like it!



Re: 69 dart grill block off et,mph improvement??s [Re: rebel] #1256655
06/27/12 05:18 AM
06/27/12 05:18 AM
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pacific northwest
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Stroker Scamp Offline
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ive never seen your car run with out a hood, wonder if a cowl hood would help??


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Re: 69 dart grill block off et,mph improvement??s [Re: rickseeman] #1256656
06/27/12 08:29 AM
06/27/12 08:29 AM
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Missouri
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Quote:

Cardboard is not strong enough. Use something that won't give. I bought a hemi dart from a guy in 1977. He ran SS and M/P with it. When he ran MP he had a clear piece of plexiglass behind the grill.



Cardboard taped to the front of the grille will work absolutely fine, wheres it gonna go, its gotta grille behind it? Done it many a time on diff cars and 68 & 69 grilles are the best cuz they are so flat. He only needs one run WITH the cardboard on it.

Re: 69 dart grill block off et,mph improvement??s [Re: StrokerPost] #1256657
06/27/12 03:59 PM
06/27/12 03:59 PM
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oregon
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greendart408 Offline OP
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I will try the cardboard for kicks and see what happens. If I have positive results I will take the time and make a nice plexiglas cover. Know anyone that might want a mint new glasstek hemi hood.....lol!

Re: 69 dart grill block off et,mph improvement??s [Re: greendart408] #1256658
06/27/12 07:40 PM
06/27/12 07:40 PM
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robin hood country
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Report back with your results.
Mick


69 Dart GTS 440 mopar .590 cam, Edelbrock heads, 3200#
best et 6.45, 106.78, 10.14, 132.88 mph, 1.47 60ft
best 60ft 1.36






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