5.0

Red370 · 09-20-2011, 02:44 PM

I like the look of the boss mani, but from what i've read, it kills your low end torque and only increases power above 5k, is this true?

Red__Zed · 09-20-2011, 02:46 PM

Quote:

Originally Posted by Red370

I like the look of the boss mani, but from what i've read, it kills your low end torque and only increases power above 5k, is this true?

I've heard the same...curious how it is with a good tune though

m4a1mustang · 09-20-2011, 02:51 PM

Quote:

Originally Posted by Red__Zed

I've heard the same...curious how it is with a good tune though

A local guy here had the 302 IM on his car. There is a slight hit to low end power but the gains at the top end are substantial.

With a tune, you have silly gains of like +45 whp at 7k where the stock manifold has dropped off and the Boss IM just keeps pulling.

Red370 · 09-20-2011, 02:55 PM

Quote:

Originally Posted by m4a1mustang

A local guy here had the 302 IM on his car. There is a slight hit to low end power but the gains at the top end are substantial.

With a tune, you have silly gains of like +45 whp at 7k where the stock manifold has dropped off and the Boss IM just keeps pulling.

dunno if i'd wanna stay that high with the stock cast rods

GZ3 · 09-20-2011, 03:26 PM

Quote:

Originally Posted by Red370

dunno if i'd wanna stay that high with the stock cast rods

the forged powdered-metal connecting rods are totally fine in NA applications, i dont think anyone is spinning more than 7500

GZ3 · 09-20-2011, 02:51 PM

Quote:

Originally Posted by Red370

I like the look of the boss mani, but from what i've read, it kills your low end torque and only increases power above 5k, is this true?

the tq loss is negligible, i didnt even feel it. After 3 datalogs with BBR they corrected all tq loss, there is gains under the curve, then it ******* skyrockets around 6700rpm...my redline was bumped to 7500 so I made power all the way up to that...let me see if i can find the dyno graph in my flash

09-20-2011, 02:44 PM	#1 (permalink)
Red370 A True Z Fanatic Join Date: Jul 2009 Location: Kaiserslautern, Germany Posts: 4,391 Drives: your mom to church Rep Power: 297	I like the look of the boss mani, but from what i've read, it kills your low end torque and only increases power above 5k, is this true? __________________ 2011 Mustang 5.0 \| 3.55's \| Lethal Performance off road H-Pipe \| Magnaflow Muffler Delete \| JLT CAI/Bama tuned 417whp/ 404 ft/lbs