Mazzenger

iTrader: (5)

I took my 408 back to the dyno.
It made 525 rwhp and 485 rwtq. with a locked converter.

Car: 1998 Z28 w/17x9 ROH Snypers on all corners.

Trickflow 235cc Heads with 11:0 SCR
Fast 90/90 Intake - Ported by Tony Mamo
247/251 .624/.632 @ 112 LSA
Yella Terra 1.7 non adjustable Rockers
Hooker 1 7/8 Headers w/TSP Y-pipe w/Hooker Maxflow Muffler over axle
Cut-out Open
10 Bolt Rear w/ 3:73s
4L60e - Beefed up and a SS4000 Torque Converter
Underdrive Pulley and 98mm Lid
91 Octane Gas
Tuned and Built by XP-Racing

Hoping to get some time slips soon.

z28241

iTrader: (13)

Those are fantastic numbers!..WOW! did u do any runs w/ converter Unlocked?

Mazzenger

iTrader: (5)

I didn't get unlocked #s this time, but it is probably in the 480-490hp range unlocked.
The 525 hp 485 tq was the final of 3 pulls. It did 517 first pull and 520 second pull.

There is also about a 12hp difference w/the cutout open compared to closed.

Gordon0652

iTrader: (4)

Awesome numbers! Now track!

adamantium

iTrader: (3)

Nice!

Slowhawk

iTrader: (12)

Looks like a nice low 10 second daily driver.

Spellbound

Interesting, my girlfriend has a LS3 427 with the same heads, Cam specs are the same on duration, 1 7/8 headers to a Y and over the axle, about the same compression, but she has a 12 bolt with 3:73's.

With a locked converter she made 533/4XX. Her best ET was a 10.66 with a 1.44 60'. Her race weight was 3690.

My question, are the extra cubes worth the 8 rwhp plus whatever the difference between the 10 and 12 bolt?

raysadude

iTrader: (11)

Did brett tune your car or you had someone else tune it?

Jimbo1367

Great numbers. Very flat/ broad torque .

Mazzenger

iTrader: (5)

Raysadude - Yes. Brett tuned the car.
Spellbound - Not sure. But her LS3 weighs less and still makes more power than my 408.
Jimbo1367 - Thanks - I am getting used to the torque. The LS1 didn't have near the torque

venom ws7

iTrader: (13)

Great numbers man CONGRATS

Low 10s will be easy if the 10bolt will hold

Mazzenger

iTrader: (5)

Yeah the 10bolt is my next upgrade.

sergo

those are great numbers out of a stalled and geared auto
i really like those TFS 235s and they are fast coming up to the top of my short list.

Mazzenger

iTrader: (5)

I researched for months on heads. AFR, TFS and PRC 237cc were my top 3. All for different reasons.