The auto-engine is bound to make more torque, the cam's are set with less overlap, also a longer primary runner would help bring torque up like a race car running a intake restrictor (very very long air runner straight to the throttlebody)
The video is on a stock X-Pipe with the resonator, depending on the tune the crackles are very very nice as is.
Hard to tell, the simplest we could do to quantify would be VE calculate it, but the F136QC in your's has the following differences
Hard to tell, the simplest we could do to quantify would be VE calculate it, but the F136QC in your's has the following differences
If you where to VE calculate back 498 / 4.7 = 105.95 HP/L X 4.2 = 445 HP (502 NM)
- Cam timing different, I recall the duration too
- Bore/Stroke ratio slightly different
This off-course isn't that super straight forward but a rather rough ball park aka just like a F136YE 4.7 does out of the box.
That said you're nearby, i'd work you a deal
For Quattroporte F1 yes, we have done testing, the connection to the X-Pipe we haven't designed yet
Excl VAT for EU customers, and basically UK customers as they'll have it upon arrival.
If you did buy it, you have allowed Zep to become the test-mule for those gorgeous manifolds on a Strad.
