408 Dyno Numbers
408 Dyno Numbers 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.
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.
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.
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.
11 Second Club
Joined: Feb 2002
Posts: 639
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From: Norcal
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?
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?
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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
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
