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#1
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Will these changes make a difference?
I have ran 12:40's with my current set up and for the last race of the year i would like to dip into elevens. I will change the following if it will shave the time...
1. remove exhaust from header back... anticipated gain... .3 2. change to a drag race wheel and tire in front(running MT ET Streets out back)... 3. loosen front sway bar to increase 60ft.. I think the last 2 should be good for .2 as well...what say ye...any suggestions or thoughts?
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434 CI TKO600RR 1969 Carousel Red RAII Heads...Pump gas 400+hp/450+tq at the wheels...life is good! |
#2
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Don't want to burst your bubble,but if your running a decent exhaust system I doubt you'll lose .3,maybe .1 if you have full exhaust with tail pipes.On my Firebird I only lose .01-.02 going from open headers with a 3.5"x 12" extension to a reduced 3" xpipe with 3" Hooker maxflo's at the axle.Don't know what your 60's are but you could pick up a bunch from your other two mods listed.Maybe a 100 shot of N20 would get you there easier
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Mark 1970 Lemans Convertible,462,6x-4, 234/242 cam.3.42 posi.12.55@109,4100 lbs...SOLD.... 1968 Firebird , 467 , KRE d-ports ,stock type suspension,3100lbs (1.30 60')(6.08 1/8)(113.43)different runs 9.59 @140.71 on E85 all motor 8.97@148.63 on 150 shot |
#3
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60
My best 60 ft is 1.89...plenty of room for improvement...thats for sure. I am running american thunder exhaust kit from summit..H Pipe set up...sounds as good as anything else I have listened to...it is only 2 1/2 inch tho...so may be a bit restrictive.
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434 CI TKO600RR 1969 Carousel Red RAII Heads...Pump gas 400+hp/450+tq at the wheels...life is good! |
#4
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There`s one way to find out. 2 1/2 pipes might be restrictive on a 12.4 car. Need to see why you only get 1.90 60`s 1`st.
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#5
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car is set up for cornering..gotta remove sway bar...car dont transfer well..
__________________
434 CI TKO600RR 1969 Carousel Red RAII Heads...Pump gas 400+hp/450+tq at the wheels...life is good! |
#6
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When I was in the 12's with a 3" pypes x change and race pro mufflers. Opening the cut outs was worth .2.
I have some collector extensions, 3" flange x 14" you can have cheap. They will help over running straight off the header flange. The 2 1/2" has to be restrictive. Also removing the weight always helps. Remove the sway bar completely. That will help. What traction devices are you using? Shocks? I have a set of Centerline wheels I removed after changing to Bogarts. Front are 3.5" with skinny tires. Rears are 15 x 10 with the Ford 5 x 4.5 bolt pattern. Can you weigh one front and one rear tire and rim? You can find nice gains lightening up the wheels.
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68 Firebird Are you running with the wind or breaking it? |
#7
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I removed about 140lbs last winter. No other changes.
No change in the 60 or the 1/8th. Gained 1-1.5 mph, but still havent beat its fastest run. Havent had enough time to test. Every time i plan to go something else happens.
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If you cant drive from gas pump to gas pump across the map, its not a street car. http://s207.photobucket.com/albums/b...hop/?start=100 |
#8
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Quote:
Also my buddy wants me to install wheel studs...is this neccessary? when I run my street wheel and tire combo its gonna look hella funny...any way around this?
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434 CI TKO600RR 1969 Carousel Red RAII Heads...Pump gas 400+hp/450+tq at the wheels...life is good! |
#9
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BTY, my car runs the same with either 14x7 ralleys with wide radials vs lighter 15x4 Weld Pro Stars with 4" m/t tires.
But like said earlier, wont know till you try.
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If you cant drive from gas pump to gas pump across the map, its not a street car. http://s207.photobucket.com/albums/b...hop/?start=100 |
#10
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I lost 52 lbs in wheels and tires and picked up .18.
25.00 shipped? They cost me 40 to make but I have no use for them with 3.5" collectors.
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68 Firebird Are you running with the wind or breaking it? |
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