416 LS3 Owners
 

What have done to your engine and what kind of power is it making. I am looking at making some changes to my 416 and whould like to see what others are doing.

We sell 418 short & long blocks all the time that make anywhere from 600 flywheel hp to 675. Tell us about your components & we can discuss what all options you have. What intake are you running? Whats your power goals & current power?

Jason
www.texas-speed.com

Jason I dont know what you are looking for that I did not have listed below

2008 C6 / A6 coupe blk LS3, F55,
416CI, B&S 4.070 x 4.000
Century 6L80 Trans
Haltech CAI
AR headers / x-pipe no cats
cam 243/259@50 625lift 113 LSA
3800 triple disc stall Circle D
Fast 102 intake
60# injectors
LSA heads
SD8802-1
.650 dual spring Patriot
Manley SS valves, 216.5 intake 160 exhaust
Flow 351 intake & 228 exhaust at 600 lift
70cc chamber
3.42 Z06 diff
Dewitt radaitor & fans
P-fadT trans mounts / Hinson engine mounts
Oil catch can
electric exhaust cut outs

Seems like a great list of parts to me. Whats the compression ratio ? What is it that you dont like about it now ?

10.9
The engine is not making the numbers it should be making. I would like to know what other people are getting out of their stroked LS3 engines. this will help me figure out what about my combo is off.

What are the current numbers? Who tuned it?

You could find a lot of power just in a cleaner tune, if that's the issue. The setup itself looks pretty rockin.

I think Jimbo (ZZOOM06 ) on this forum has a 416 stroker. He is @ 543/493 rwhp\tq on a dynojet

depending on the day, weather, angle of the moon, and amount of shade on the tires it can go from 505-515RWHP. I know the tune is pretty good because I have had it looked at by different people, but could it be an issue, hech I dont know. I have HPtuner and I scan the car all the time and I know my AFR because I have a wide band on the car.

The engine runs great and 80% of the world would say good deal but thats not me. The combo is off a little and with the correct tweaking it sound wake up.

Are the numbers from a dynojet or Mustang dyno ?

dyno jet. the car traps 101-103mph in the 1/8th mile.

Getting any false knock? What is your total timing?

416, FAST, Big Comp Cam, headers, CNC heads etc, 548 at the wheels.

My 416 has been a disappointment as well. I've changed out the cam, last spring I had the heads flowed. So I've different heads on it now, just going to upgrade the Yella Terra's with new version. Also will swap out the ID 1000's for LS9 injector's, re tune & hit the dyno again.

That should be a mid 10 second run. That is right where I am at in the 1/8th. Are you getting 30+ mph on the back half ?

Same combo I installed in an 03 Z. Right at 550 whp on a dynojet. Now spraying a 150 shot. Ran 198.8 at the Texas Mile this weekend. Engine was built by LME in Houston.

My was built by Wegner Engines.

http://i254.photobucket.com/albums/h...psc65675c7.jpg

I also have a 416 making 450whp on a mustang dyno nothing impressive, sleeper cam 230/234 602 602 117 lsa, stock intake. 10.4 1/4 on hp leaving off idle with a 1.41 60ft. You are making 500-515whp through a 3800 stalled auto! I would be happy take it to the track run in the 10s. Your setup in a m6 car would make 525-540whp all day. Nothing to worry about.

Dont look at dyno numbers, perfect example, 9.1 with 637whp
http://ls1tech.com/forums/drag-racin...-2004-z06.html

i just finished a 09 with a wegner built 416 and a eforce blower making 723 at the wheels. drives like stock with a rps triple carbon clutch :thumbs: awesome car its the guys daily driver

505-515 thru an auto and OEM heads sounds about right assuming a mild compression ratio. Depending on the weight of the car, the MPH looks about right as well. There are lots of things that you can do to make more power but they usually come with a sacrifice. Easiest thing would be to raise the compression by milling the heads down then switch to E85 and throw a bunch of timing at it. Same can be done with race gas. You could also port the heads or get a better flowing set from the after market. Lots of ways to skin the cat.