boss 429 hp quesstimate??
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boss 429 hp quesstimate??
hello fellow blue oval faithful! I'm new to this sight. i recently just got my 69 boss 429 put back together after 10 long years of having it apart. i got to drag race it at a local airport event over the weekend after much anxiety and elevated blood pressure i discovered the mickey thompson drag radials are severely over matched... here are the stats on my build
4.39 bore
lunati 4.5 crank
mahle kaase boss nine pistons about 10.5:1
eagle 6.7 rods
lunati voodoo cam 30340743 solid lifter
257i 265e @.050
110/106 lsa/icl
nascar rocker arms
70 boss 429 full hemi chamber heads
2.30 intake 1.90 exhaust
the heads were ported by chapman racing heads thats the way i got them
kaase boss 9 4150 intake
holley 1000 annular booster carb
i know its making serious power as 1st and second gear went up in smoke on my first run.... any guesses would be greatly appreciated and how much power am i giving up with the small carb?... i have a kaase 4500 intake and a prosystems sv1 as well its about 1200 cfms but it was breaking up on me at 3500rpm. thanks for the replies in advance...... joe
4.39 bore
lunati 4.5 crank
mahle kaase boss nine pistons about 10.5:1
eagle 6.7 rods
lunati voodoo cam 30340743 solid lifter
257i 265e @.050
110/106 lsa/icl
nascar rocker arms
70 boss 429 full hemi chamber heads
2.30 intake 1.90 exhaust
the heads were ported by chapman racing heads thats the way i got them
kaase boss 9 4150 intake
holley 1000 annular booster carb
i know its making serious power as 1st and second gear went up in smoke on my first run.... any guesses would be greatly appreciated and how much power am i giving up with the small carb?... i have a kaase 4500 intake and a prosystems sv1 as well its about 1200 cfms but it was breaking up on me at 3500rpm. thanks for the replies in advance...... joe
Bosskk1786- Posts : 96
Join date : 2016-09-01
Re: boss 429 hp quesstimate??
Time and MPH???
cletus66- Posts : 865
Join date : 2009-08-08
Age : 58
Location : Charles City, Virginia
Re: boss 429 hp quesstimate??
it was not a timed event. it was a flagged start and run to the cones on an 1/8th mile.... i plan on taking it to lancaster speedway in a week or so to see what it will do on a prepped surface
Bosskk1786- Posts : 96
Join date : 2016-09-01
dfree383- BBF CONTRIBUTOR
- Posts : 14851
Join date : 2009-07-09
Location : Home Wif Da Wife.....
Re: boss 429 hp quesstimate??
i know i'm probably leaving a lot on the table with my cam choice but i street drive the car and i wanted to keep lower spring pressures since the heads had some cracks in the head bolt areas
Bosskk1786- Posts : 96
Join date : 2016-09-01
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