454 LSX Build HP Estimate
Sep 26, 2007 | 06:28 PM
#11
Originally Posted by adams2003
Yeah im expecting anywhere from 500 -550 to all four wheels on the local mustang dyno....probably closer to 500.
Sep 26, 2007 | 06:57 PM
#13
A smaller cam will help move his heavy pig and the high flowing heads will help it carry the power up top. This is EXACTLY what Im experiencing with my 420 and a 224 cam. My heads flow 335cfm at 600 but Im only running a 560 lift cam, it drives AWESOME down low but still screams up top for what it is and being choked by the stock intake. Just my .02 from driving basically the same setup just smaller cam/cubes.
Sep 26, 2007 | 06:58 PM
#14
Originally Posted by GMracer
if you dont mind PM me what you're lookin at cost wise for the build. I cant wait to see this thing up an running.
Sep 26, 2007 | 07:56 PM
#16
Thread Starter
Launching!
Joined: Dec 2005
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Originally Posted by dirt_track_racer_81
i could be wrong here but to me if the ls7 heads flow an enormous amount of air why not get a cam that can benefit the big heads and flow that enormous amount of air..the stock cam of an ls7 is like around .59x lift...too me its like runing a 408 on a stoker on a ls1 hotcam..decent duration but low lift..its something you can also play with after you get it goin..there could be more left on the table..swappin a cam is only a 2-3 hour job if you dont have to change springs
Sep 26, 2007 | 07:58 PM
#17
Thread Starter
Launching!
Joined: Dec 2005
Posts: 224
Likes: 0
Originally Posted by GMracer
if you dont mind PM me what you're lookin at cost wise for the build. I cant wait to see this thing up an running.
-shortblock
-assembly of the motor
-ported ls7's
-harland sharp rebuilt ls7 rocker arms
-ported ls7 manifold
Last edited by adams2003; Sep 26, 2007 at 08:07 PM.
Sep 26, 2007 | 08:02 PM
#18
Thread Starter
Launching!
Joined: Dec 2005
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Originally Posted by Quik
with that low of compression i dont expect the full potential of that combo. might be a partial dog and only make low 500 to wheels
LOL.....partial dog I highly dought. What you have to keep in mind is (said this in my first post) they way the pistons were designed compression loss is much much more minimal than your standard flat top or dome piston. Meaning although the cr is 10.85 it will act more like a much higher compression motor. My engine builder told me he would be highly dissapointed if it made anything less than 700hp at the flywheel (peaking around 6300rpms).
Sep 26, 2007 | 08:51 PM
#19
Originally Posted by adams2003
LOL.....partial dog I highly dought. What you have to keep in mind is (said this in my first post) they way the pistons were designed compression loss is much much more minimal than your standard flat top or dome piston. Meaning although the cr is 10.85 it will act more like a much higher compression motor. My engine builder told me he would be highly dissapointed if it made anything less than 700hp at the flywheel (peaking around 6300rpms).
Sep 26, 2007 | 10:58 PM
#20
Damn How did you get it all done for 10k?????????????
I'm into mine about that and I used the top end off my all bore 388 motor. I am starting to think that a "budget LSX" might be in order for the Yukon...maybe a 427 with a L92 top end, I bet I could get into that for 8k or so....
I'm into mine about that and I used the top end off my all bore 388 motor. I am starting to think that a "budget LSX" might be in order for the Yukon...maybe a 427 with a L92 top end, I bet I could get into that for 8k or so....