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What kind of WHP numbers to expect on dyno day??

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Old 02-06-2019, 09:19 PM
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Default What kind of WHP numbers to expect on dyno day??
Hey guys, I’m just curious on what numbers to expect with the following mods.: M6, forged 347, mild ported 243s(Performence valvejob and cleaned up runners) BTR stage 3 cam( BTR cam kit), LS6 intake, 85mmTB, compression 11.1:1, fast 36lb injectors, 1 3/4 longtubes with off road x-pipe.. thank you guys in advance!!
Last edited by Aaron Hernandez; 02-07-2019 at 12:38 AM.
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Old 02-07-2019, 06:58 AM
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421 rwhp
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Old 02-07-2019, 07:46 AM
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Ok thanks man.. was hoping for higher numbers but 420whp should be pretty fun after all said and done!
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Old 02-07-2019, 08:20 AM
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Originally Posted by Aaron Hernandez
Ok thanks man.. was hoping for higher numbers but 420whp should be pretty fun after all said and done!
i like guessing low, hard to say with out knowing really how much porting was don’t on the heads


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Old 02-07-2019, 08:35 AM
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Here’s some specs from the builder
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Old 02-07-2019, 08:37 AM
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Old 02-07-2019, 12:14 PM
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when are you dynoing it?
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Old 02-07-2019, 12:27 PM
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February 20th.. are you able to see the pics of the head specs I posted?
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Old 02-07-2019, 01:28 PM
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Yea larger valves but doesnt show flow numbers, still alot of variables for dyno numbers as they all read different.
Tires and wheels, gear ratio, tune, fuel quality all play into power numbers
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Old 02-07-2019, 01:41 PM
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380-400 ish. 13/4 headers and, ls6 intake all are choking that motor bad.
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Old 02-07-2019, 02:34 PM
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Ok.. I’ll post up dyno numbers in a couple a weeks!! Thanks for the info guys
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Old 02-07-2019, 02:40 PM
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Originally Posted by Mavn
380-400 ish. 13/4 headers and, ls6 intake all are choking that motor bad.

defiantly intake, post up numbers when you get them!
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Old 02-07-2019, 03:07 PM
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I just talked to BTR and they said the 1/34 headers would be be fine.. maybe lose 5hp... plan on going fast 92/92 eventually
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Old 02-07-2019, 04:28 PM
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415/380 my guess
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Old 02-07-2019, 05:40 PM
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I also say around 380-400 Edit: Closer to 400. Seems like lately a lot of cars are dynoing higher with mild cams than they used to with a T rex or MS3.

I've seen plenty with equal mods and a FAST intake come in at 400-420 so it's hard to see yours be higher than 420.
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Old 02-07-2019, 09:22 PM
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Most will agree that the “magic” here will be in the tune. Lots of power to be found there. I usually don’t bite at these type of things, but I’m gonna step up and say 407/380. I bet it’s gonna be a blast to drive, no matter what the stupid dyno says, and that’s all that really matters.
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Old 02-08-2019, 05:54 AM
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Originally Posted by Che70velle
Most will agree that the “magic” here will be in the tune. Lots of power to be found there. I usually don’t bite at these type of things, but I’m gonna step up and say 407/380. I bet it’s gonna be a blast to drive, no matter what the stupid dyno says, and that’s all that really matters.
I agree man.. but it was fun to get everyone’s opinion... can’t wait to post up dyno sheets in a couple of weeks.. even though if I post anything over 420whp I’m sure I will here it was a happy dyno lol
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Old 02-08-2019, 08:46 AM
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My guess is 404/389.
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Old 02-08-2019, 07:08 PM
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No idea really due to the two wild cards tuning & what type of dyno.

M6, forged 347, 11.1 to 1 compression
mild ported 243s - Perf. VJ & cleaned up runners
BTR stage 3 cam - 231/242 .617"/.592" 112+2

​​​​85mm TB, LS6 intake, fast 36lb injectors,
1 3/4 longtubes with off road x-pipe

428 whp & 392 Dyno-Jet
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Old 02-09-2019, 09:48 AM
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Man, another suck the wind out of my sails thread. I am building a combo very similar to Aarons. Only TSP stage 2.5 CNC 243s and BTR 2 NA cam.

I know I know dynos are just a number and it's all in the tune and how it drives. Thankfully I have one of the best tuners on the west coast.

My car will be on the rollers on the 25th.
Last edited by Mr. Black; 02-09-2019 at 10:11 AM.
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