408 with stage 3 ls6 heads dyno numbers
11-14-2011, 07:58 AM
#1
Staging Lane
Thread Starter
iTrader: (2)
Join Date: Oct 2006
Location: Longview, Tx
Posts: 55
Likes: 0
Received 0 Likes
on
0 Posts
408 with stage 3 ls6 heads dyno numbers I have a 408 iron block in a 2001 ws6 Trans am that made 460 440 thru a 12 bolt. My setup was stage 3 ls6 cnc'd heads, Texas giant cam, 1 3/4 stepped to 1 7/8 lt headers, and full bolt on's.
After talking to Jason at Lucky speed and performance, he seems to think that switching to a set of cnc'd ls3 heads and a custom cam and their in house tune I should break the 500 rwhp mark. So I have purchased all the necessary parts and am currently waiting on them to come in. Once they are installed I will update you with the new dyno results.
After talking to Jason at Lucky speed and performance, he seems to think that switching to a set of cnc'd ls3 heads and a custom cam and their in house tune I should break the 500 rwhp mark. So I have purchased all the necessary parts and am currently waiting on them to come in. Once they are installed I will update you with the new dyno results.
11-15-2011, 09:07 AM
#6
I'm a cathedral fan personally, depending on who did the st.3 port on your 243's will determine if you see gains on the LS3 heads. A properly spec'd cam needs to be used for the LS3 top end as well. Those huge runners and intake valves don't need a huge intake lobe to fill the chamber on a 408.
You never mentioned your intake setup on the 243 heads?
You never mentioned your intake setup on the 243 heads?
Trending Topics
11-15-2011, 12:01 PM
#8
Staging Lane
Thread Starter
iTrader: (2)
Join Date: Oct 2006
Location: Longview, Tx
Posts: 55
Likes: 0
Received 0 Likes
on
0 Posts
Sorry guys, Yes it was buget build. I had a ported ls2 intake, a 90mm tb, slp maf, slp lid, 1 3/4" stepped to 1 7/8" headers, underdrive, and stock rocker arms.
11-15-2011, 10:06 PM
#11
TECH Enthusiast
iTrader: (21)
Join Date: Mar 2009
Location: Sacramento Ca
Posts: 619
Likes: 0
Received 0 Likes
on
0 Posts
That LS2 intake manifold was probably holding back a bit of power on your cathedral port setup. A FAST setup would've definitely been beneficial on a stroker motor with a huge cam like the one you were running. However, the LS3 topends seem to work wonders as well when setup correctly. Good luck...
11-15-2011, 10:45 PM
#12
You can definately spend a few grand on heads and a cam but if you dont handle the basic supporting mods I think you may be even more dissapointed.
Not sure what your answers will be to the questions above as long as your injectors are efficient at least 36lbers and at least an 85mm maf not the stock 78mm slp maf. I really think you can be within a few HP of 500rwhp with that setup fast 102 or ported fast 90-92mm intake, and a good solid tune.
Those numbers are good but I really think you can get more bang for the buck by tweaking what you have over a H/C swap. Because you still have to cover the basics mentioned in most cases.
Ha I rearead the initial post... it seems you already purchased the stuff. I am sure Lucky has a special sauce formula for ya. Good luck with it and definately post the results.
Plus you get to sell the cam and current heads so its sorta a win win.
11-16-2011, 08:09 AM
#13
Staging Lane
Thread Starter
iTrader: (2)
Join Date: Oct 2006
Location: Longview, Tx
Posts: 55
Likes: 0
Received 0 Likes
on
0 Posts
I have ford green top 42 Ib injectors. The SLP maf was a 85mm and was acting as a limitation on the air flow. I agree that the intake was leaving a lot on the table. The main reason for running the intake was for the n2o. The intake is a Dave’s n2o money maker. The largest limitation was the small runner heads. The heads were stage 3, but were 215 runner heads.
