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Hi I have a LS3 418 ci stroker
also. LS3 Heads, Forged internals 90mm TB with stock LS3 intake 1-3/4 inch LT headers. Mike Norris of Norris Motorsports tuned my ride on a Mustang Dyno. Hope this gives u more insight
changing headers will probably net very little gain but who knows. the lg 1 3/4 headers make good power. my car (f body but still....) had 1 3/4 qtp, unported 90,just got rid of the bump in it,244/248 cam made 538 rw on my 408.after you get you cat delete kit on and hit the rollers again if they would let you you could drop the exhaust and see if that 2 1/2 system is restricting it any.
Not a bad idea....lol not sure the shop would be up for that. Im more than intrigued to see what happens after I get the cats off. Driving it around town....it feels....corked.
Hi I have a LS3 418 ci stroker
also. LS3 Heads, Forged internals 90mm TB with stock LS3 intake 1-3/4 inch LT headers. Mike Norris of Norris Motorsports tuned my ride on a Mustang Dyno. Hope this gives u more insight
Forgot to mention I have a custom grind cam also with build.
while the lowest one here is 13* higher than the other 2, they were all on dynojets with the same mods on the car. I don't have a graph form the highest reading dyno in my area but its known by everyone as the happiest dyno in town and would read a good 20hp higher than my highest results. A place called Dynolab. Here are the graphs i do have. This is also good to show OP, in order to not get too caught up in the numbers game. the last one was std correction. The SAE numbers were 510/480
The first two are within 10 not that far off and if the second was in smoothing 5 it might be a little closer. The one in STD at that power level would probably yield more than a 10 horse difference and bring it to 500 or a bit lower which again is with in 10 horsepower of the first and inline with the second . I will post some graphs in STD to SAE to show you tomorrow.
I have a 418 ls3 but in a fbody m6. My numbers are low as well. Im only at 464rwhp 466rwtq. However my dyno was on a mustang dyno not a dyno jet. I have cats and a y pie and a lame catback. Im praying that switching then up for true duels and taking it to a dyno jet ill pull 500+. Maybe my tunes off so ill have it checked as well. When you factor in the 12% difference from mustang to dynojet its 520 but i want to see it on there first.
I have a 418 ls3 but in a fbody m6. My numbers are low as well. Im only at 464rwhp 466rwtq. However my dyno was on a mustang dyno not a dyno jet. I have cats and a y pie and a lame catback. Im praying that switching then up for true duels and taking it to a dyno jet ill pull 500+. Maybe my tunes off so ill have it checked as well. When you factor in the 12% difference from mustang to dynojet its 520 but i want to see it on there first.
What heads, cam, intake, exhaust, and compression are you running?
HMMM, after reading this thread maybe I should ditch my random technology cats? Free up some ponies. I have a magna flow exhaust system with Y pipe also
HMMM, after reading this thread maybe I should ditch my random technology cats? Free up some ponies. I have a magna flow exhaust system with Y pipe also
I feel like its holding me alot. I havent had time to mess with it but when i free up the exhaust and take it to a dynojet ill see if i get the numbers im looking for. From what i understand the more power you have the bigger a change in something like that will do. We got big 400+ cube motors they got to breath.
The first two are within 10 not that far off and if the second was in smoothing 5 it might be a little closer. The one in STD at that power level would probably yield more than a 10 horse difference and bring it to 500 or a bit lower which again is with in 10 horsepower of the first and inline with the second . I will post some graphs in STD to SAE to show you tomorrow.
Are those recorded as Flywheel numbers or rear wheel on your Dyno? Just curious, thanks
I have a 418 ls3 but in a fbody m6. My numbers are low as well. Im only at 464rwhp 466rwtq. However my dyno was on a mustang dyno not a dyno jet. I have cats and a y pie and a lame catback. Im praying that switching then up for true duels and taking it to a dyno jet ill pull 500+. Maybe my tunes off so ill have it checked as well. When you factor in the 12% difference from mustang to dynojet its 520 but i want to see it on there first.
I wonder what your cam specs are. Do you have a dyno graph to post?
I wish i knew it. Pisses me off i dont, i just try to tell my self the mustang dyno and the exhaust is why it was low
Keep us posted...interesting to see. I will keep you guys updated. Called LG today and they were supposed send them out today...although I still haven't received a tracking number
Keep us posted...interesting to see. I will keep you guys updated. Called LG today and they were supposed send them out today...although I still haven't received a tracking number
Hopefully the cats were bad and you find the power that's missing
Keep us posted...interesting to see. I will keep you guys updated. Called LG today and they were supposed send them out today...although I still haven't received a tracking number
Will do. Im thinking im gonna do the exhaust and take the cats off. I want true duels. Whats a good true duel setup other then kooks. I want kooks but i dont want to spend 1600 on something that possibly wont unlock my power. I might take it to a dynojet and see what numbers i can pull from that.
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