Figured I would post up the dyno numbers from my build.

its a 402 forged ls2 stroker
Callies crank, Rods
Manley pistons
12:1 comp
steel top rings
Arp everything
TEA TFS 225cc heads
Harland sharp RR
Texas giant cam
Lsxr 102mm
Ls2 Tb
1 7/8 kooks Lts

This is in an 01 Z

Build by me, Tuned by ECS

 

Nice numbers.

 

thats really good power, especially for being such a low revver! Looks like 5800 or so is the peak RPM. Was that a dynapack that you tuned it on?

 

What is the drivetrain? Good numbers!

 

Nice numbers, but how does a 402 with TFS heads and all the boltons get beat by a stock cubed, stock bottom end LS3, ported L92 heads & a ported L76 intake...on the same dyno

 

Drivetrain is C5 rps twin carbon clutch, fresh rebuilt Mn12, 3.90 rear with c6 Z06 internals.

The dyno was a Dynapack.

 

Those numbers beat 80% of the dyno numbers posted in the 408cid thread.

L92 cars are strong, no doubt.

Also, this bottom is very fresh, under 300 miles and has total seal steel top rings gapped for nitrous.. they need a good 4-5k to seat.

But im quite happy with these numbers, the car should run 10.6-10.8's all day long.

In a few weeks Im installing a stand alone fuel system with a Nano assisted nitrous kit of my choice and spraying 150-200

 

theres abviously a lot of room for discrepancies here. How much do those ported L92 heads flow vs the TFS heads? Same with the intake. What about cam specs? Also the "stock bottom end LS3" is only about 23ci down from the 402ci which can easily be made up with a few more revs, especially since this guys 402 peaks at about 5800rpm and the gra[h you posted peaks about 500rpm higher.

 

how does a dynapack compare (numbers wise) to a dynojet.

 

Dyno numbers dont win drag races.

 

please explain

If I made 516rwhp with a 402/TFS225s/12:1cr....i wouldnt be happy. Id expect 530 atleast but thats just me.
Nysbadmk8 seems to be happy and thats all that matters. 516/488 is still a monster on the street.
& btw the dyno sheet i posted is C6 DVLs, who holds the record for fastest stocked LS3 cubed NA vette. 10.6@132

 

so you wanted to compare "THE FASTEST" LS3 engine vs. somebody elses? on top of that the builds are completely different. What were you trying to accomplish then??

If thats "THE fastest stock LS3 cubed" (you guys come up with a new "segment" or title everyday it seems btw) then this guys build gains even more credibility and respect considering hes only about 10hp shorter than a guy with the all-time record with only 23ci more while keeping the rpms down at the same time.

 

there is alot more to wining drag races than just power... transmission, TQ converter or clutch, rear gears, tires, reaction time, shift point etc....

 

Obvious change I would have recommended:

Change the camshaft...

 

All im saying is the guy has a 12:1cr 402 using top notch parts and made 516rwhp 488rwtq.
and from what I see on this site, those rwhp numbers are low but then maybe im getting spoiled seeing Vengeance racing & Virginia Speed & others put out strokers putting out 540/500.

 

I thought it would of done more with tfs heads. my l92's got 530hp,11.0.1 compression and 10.8's 1/4mi hitting the rev limiter in 1st and 2nd gear.
still,not bad and should see another 10ish hp after break in. I was told by vengeance recing they get 550hp from their 402ci's w/225 tfs heads. I'm looking to move to the tfs 225/235 heads over this l92 set.

 

+1

You can have all the best "top notch" parts you want and still fall short of what you "could" or "should" do with regard to power if your setup has mis-matched components. Not to say that the TSP Giant is a bad cam per say, it's just not tailored to this specific combo.

I too feel that based on the modifcations, this car is producing lower numbers, for now. Pretty beefy drive train and a tight motor = not too dyno friendly. In due time, I'm sure the motor will loosen up and make more power

 

With what cam? I will swap tomorrow if you think a cam change will net me 35 more peak HP without giving up anything under the curve.. I have a two piece timing cover.. cam swap wont take me more then 4 hours.


I was on the fence about this cam, I gave it a chance.. the numbers are not bad for a fresh engine I think.

I "expected" 525 to 550 rwhp

 

You would be unhappy being 14 rwhp off on a fresh bottom end, with steel top rings gapped wide for N20?

 

Too what?