wannafbody

iTrader: (2)

Stock LS1, M6, 10 bolt, TSP 243 stage 1 heads, Dorman LS2 intake, 92mm TB, TSP 1 3/4 headers and catted Y. 400 rwhp, car pulled all the way to 6600 rpm and didn't nose over. Torque was fairly flat. Here's where things get screwy. My mechanic was disappointed with 400 rwhp so he looked at another car he dynod last year. That car made 385 rwhp with stock heads and a BTR stage 3 cam. When he pulled the file up, it now read 351 rwhp. Obviously something is screwy with the dyno. I expected somewhere between 390-420 rwhp so I'm in that ball park range.

STD correction was 408 rwhp

Sorry, I don't have a printout yet.

Mavn

iTrader: (3)

Seems right on the money

HCI2000SS

iTrader: (2)

Dyno numbers mean jack. What it traps at the track will tell you how strong it is

Jtm2085

iTrader: (1)

Traps can be misleading too. Depending on traction. Most people will say other wise I know. I was spinning terribly to a 117mph trap on some 275/40/17 drag radials. Swapped to some 16in bias ply cheater slicks and picked up 4mph.

HCI2000SS

iTrader: (2)

Very true, but as long as the spinning isn't excessive the trap speed shouldn't really suffer

98CayenneT/A

Any passes that I spin go right in the garbage. If I spin bad enough I just get out of it and try again

Jtm2085

iTrader: (1)

I agree. I had always heard, "spinning inflated your traps". So at the time I was kind of disappointed in my cars performance if the 117mph trap was inflated by the spinning lol.

Darth_V8r

iTrader: (4)

My mph also increased going to bias due to getting rid of the spinning.

99 Black Bird T/A

iTrader: (4)

Wannabody sounds like good results thanks for sharing.

What clutch do you have in the car?

wannafbody

iTrader: (2)

LS6 clutch with 90K miles

99 Black Bird T/A

iTrader: (4)

Any hint of slipping? A fresh LS6 should hold 400 whp. My stock LS1 clutch held 418 whp well for a good while but eventually had some slip in the upper rpm under load.

brian_rs/ss

really doesnt seem far off. the 1 3/4 headers MIGHT hold you back a hair. but there's so many variables when strapping on to a dyno. if you trust your tuner then dont worry about 408 rwhp. how does it feel SOTP?

wannafbody

iTrader: (2)

No clutch slippage. My mechanic was actually impressed for 90K.

Car feels strong from 1500 to 6600.

I cut the bottom of the airbox to allow a bit more fresh air in. Might be worth a couple HP.

I might upgrade the lid to a 98mm to match the 85mm MAF.

After researching, dynos for almost identical setups are ranging from 400 to 444rwhp.

zboy2012

Have you had a trip to the track yet? My 5.3 with stock 862 heads, ls6 intake, BTR stage 2 ls1/2 cam, hooker 1 7/8 longtube headers, ory, flowmaster cat back made 396/396 through a 6 speed. I never took it to the track but made few pulls in Mexico and it ran strong for what the setup was. I agree with the above statements though, wouldn't get caught up in dyno numbers. My cam only Trans Am made 346rwhp on one dyno and 331rwhp on another and it ran 11.51, then threw a chris1313 a/c ram air on it and ran 11.38 and backed it up with an 11.37 in 92 degree heat so numbers don't really mean a hole lot.

ragtopz28

iTrader: (57)

Get a few good passed in...enter stats into 'Wallace Calculator' and it will very accurately give you the rwhp.

FU_I_AM_UltraZ

iTrader: (20)

That's cause dyno readings in STD read higher vs SAE. Real tuners use SAE. Flakey ricer tuner use STD so it reads higher. So they'll start baselines in SAE and final #s in STD so it looks like they found more hp gains in the tune.

Jimbo1367

Please post cam specs when saying what u have. Not everyone knows them nor has the time to RESEARCH info that pertains to YOUR. thread

thanks
jim

Marvel127

Cam is common, can look it up the on the BTR website..

As far as correction, yes, SAE is standard. Make sure it is SAE correction for all runs. Also important to note the GAINS, not just peak numbers, as even SAE dynos will vary some.

Numbers sound decent to me, though 400 rwhp with manual is under 500 bhp..

Can easily dyno at another dyno for a comparison

wannafbody

iTrader: (2)

I've since upgraded the clutch to a Diamond stage 2 due to the LS6 clutch stiicking to the floor. Grabbed a FT98 lid and redid the exhaust with a TSP catback. Proably picked up a few extra hp. Haven't taken it to the track.

My tuner found an issue after the original dyno session. The TB wasn't opening completely. That was fixed but not redyno'd.

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