2014 Gt500 5.8 vs 2015 5.0

will absolutely be a drivers race.

i predict both dispatch biblical amounts of smoke and spent rubber and end up in a ditch on the side of the road.

Paul. said:

Just curious. What other mods on your 2015 5.0, what pulley size, what RPM, and post your dyno sheet.

Click to expand...

i bet his whp is accurate or close... he has the billet whipple TB. Also those whipple tunes put up nice dyno numbers .

cant forget the '15 cars get better flowing heads and better cams... add boost and they consistently outperform the 11-14 cars.

Just make sure you get good video of it.


Sent from my iPhone using Tapatalk

gimmie11s said:

i bet his whp is accurate or close... he has the billet whipple TB. Also those whipple tunes put up nice dyno numbers .

cant forget the '15 cars get better flowing heads and better cams... add boost and they consistently outperform the 11-14 cars.

Click to expand...

Sure. Would just like to know the details.

Engine RPM
Pulley size
Other mods (exhaust, etc.)
...and so on.

Right now using whipple tune, I have 3.5" pulley , havent dynoed it with this yet, 93octanes, 72lbs injectors, vmp bap, 132mm tb, rpm 7800, dss800 halfshafts, rxt clutch w/steel flywheel, mgw shifter, steeda clutch line.

Previous dyno graph hasn't been sent to me yet, they said they're computer broke down and they're trying to retrieve their files but if that doesn't happen I want a new dyno session for it.

So next list of mods, longtubes o/r, xpide, gt500 quad exhaust, 3.25" pulley, ms109 gas, n2mb wot box, viking crusader shocks, gona try Lundracing tune and see what she does


Sent from my iPhone using the svtperformance.com mobile app

Ah, no wonder it's making so much power.

The 3.5" pulley is small - more than the 10-11 psi most cars (including mine) are running. The 7800 rpm helps as well. I stopped mine at 7000.

So was that run made with factory exhaust? The longtubes and other stuff is coming later?

i bet that stock exhaust is limiting the boost made by that 3.5" pulley by 1 or 2 psi.....

Boost is a measure of restriction, so actually, the opposite is true. Given the same blower rpm / volume, restrictive exhaust will actually increase boost, not decrease it. ceteris paribus

That said, restrictive exhaust will certainly limit power.

your theory is correct, but in practice this is not always the case. Its also more applicable to turbos than blowers.

Same reason running without an air filter will net an extra 1-2 psi with no other changes.

Paul. said:

Ah, no wonder it's making so much power.

The 3.5" pulley is small - more than the 10-11 psi most cars (including mine) are running. The 7800 rpm helps as well. I stopped mine at 7000.

So was that run made with factory exhaust? The longtubes and other stuff is coming later?

Click to expand...

Yes that was made with stock headers cats, I removed the resonator , hpipe, and roush ab


Sent from my iPhone using the svtperformance.com mobile app

gimmie11s said:

your theory is correct, but in practice this is not always the case. Its also more applicable to turbos than blowers.

Same reason running without an air filter will net an extra 1-2 psi with no other changes.

Click to expand...

But then you're opening up the inlet, and the exhaust if more restrictive is gona net more boost but not efficiently


Sent from my iPhone using the svtperformance.com mobile app

gimmie11s said:

your theory is correct, but in practice this is not always the case. Its also more applicable to turbos than blowers.

Same reason running without an air filter will net an extra 1-2 psi with no other changes.

Click to expand...

This isn't theory; it's science. Removing the air filter is not the same, as it's increasing the available air volume to the compressor. That increase in air volume being squished into the same motor will increase boost pressure, ergo the increase in boost - since it's still a measure of restriction.

More air through the same straw = more boost.

Regardless, we're getting far off topic. The whole point of my original post was simply that the car belting out 700+ rwhp is because it's running a smaller pulley, higher octane fuel, less restrictive exhaust, more RPM, etc...

Paul.

meh. reality beats science 10/10 times.

on to the race!!

If the shelby is stock, you will cream him (if you know how to drive).

Make sure to take video.

It will come down to who can hook up if from a dig, and who doesn't spin at a roll.

Im getting ready my gopro at the moment, and yea Im racing from a dig


Sent from my iPhone using the svtperformance.com mobile app

Should be over in the first 60 feet.

What does a stock 5.8 GT500 dyno? Like 580-600rwhp? OP will gap that Shelby if he hooks. 5.bros unite!

OP, what tires are you gonna be running?

Yeah, that's the power they put down stock. I'm still curious how op knows he is stock and will be stock on race day. The 13 can be at 700rwhp under 2k dollars. It's gonna come down to tires and who knows how to drive their beasts. Both bad ass cars. I'm a Shelby owner but that GT looks damn good.


Sent from my iPhone using Tapatalk

KushBandit said:

What does a stock 5.8 GT500 dyno? Like 580-600rwhp? OP will gap that Shelby if he hooks. 5.bros unite!

OP, what tires are you gonna be running?

Click to expand...

Im going to use 28x10 Hoosier Slicks


Sent from my iPhone using the svtperformance.com mobile app