New mods questions/ dyno numbers

[CamaroJHL]

Hello everyone, I have a quick question... I recently did some mods to my car (ss manual)... Full ARH exhaust with no cats(1 7/8 headers, 3 inch xpipe and ARH mufflers), port and polish TB, under pulley, 160 tsat, tr55 spark plugs and a dyno tune(mustang dyno). I dyno at 397rwhp. My question is that good numbers?, the reason I ask is because everyone that I've talk to and seen with the same setup usually are at 415 to 430 rwhp on the same mustang dyno. Thanks guys.

[CamaroJHL]

Bump

[2011 SS SLP ZL427]

That seems a little low, the stock V8 Camaros are in the 426 range give or take with no modifications, mine is the L99 Automatic which suppose to be 400 stock but its an SLP and its been tuned from them and is getting 427HP which isnt a whole lot more but they did over the computer, installed an intake, axle back exhaust, underdrive pulley, a few cosmetic changes like hood and lowering springs.

[CamaroJHL]

Originally Posted by 2011 SS SLP ZL427

That seems a little low, the stock V8 Camaros are in the 426 range give or take with no modifications, mine is the L99 Automatic which suppose to be 400 stock but its an SLP and its been tuned from them and is getting 427HP which isnt a whole lot more but they did over the computer, installed an intake, axle back exhaust, underdrive pulley, a few cosmetic changes like hood and lowering springs.

Thanks for your input I understand that the ls3 are 426 to the crank and of course to the wheels it's a lower number but I just don't understand why I am producing such low numbers with the new mods... Also i am not to happy that a stock 2013 mustang 5.0 pulled on me a little lol considering that they come with 420 from factory.

[2011 SS SLP ZL427]

Were your numbers more before the modifications?

[Supercharged SS]

Originally Posted by CamaroJHL

Hello everyone, I have a quick question... I recently did some mods to my car (ss manual)... Full ARH exhaust with no cats(1 7/8 headers, 3 inch xpipe and ARH mufflers), port and polish TB, under pulley, 160 tsat, tr55 spark plugs and a dyno tune(mustang dyno). I dyno at 397rwhp. My question is that good numbers?, the reason I ask is because everyone that I've talk to and seen with the same setup usually are at 415 to 430 rwhp on the same mustang dyno. Thanks guys.

You don't have a cai? That's your missing 10-15 rwhp.

[CamaroJHL]

Originally Posted by Supercharged SS

You don't have a cai? That's your missing 10-15 rwhp.

Oh I'm sorry, I forgot to add that on the list. I have CAI intake