GT350 vs. Z/28

[thePill]

Essex racing has already revealed their front PP 2pc rotors...10 lbs lighter each for 20 total.

As a matter of side point..a few folks over at the SVT boards weighed the complete IRS assy vs a 197 style SRA and came up with roughly 100lb difference when similarly equipped with hardware.

100% of the weight gain over the S197 is in the IRS and exhaust which account for right about 125lbs over the S197. The bones of the S550 is actually looking to be a slimmer, lighter but much more stiff and solid platform than the outgoing last generation

http://www.svt. performance.com/forums/showthread.php?1057041-IRS-vs-Solid-Axle-weight-comparison

Damn, I was told 75lbs if I remember correctly.

I thought it was 180lbs for the SLA and 250lbs for the IRS. This was well before the car was even seen though...

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[1320']

Well to be fair this was a PP rear end set up. The weight might well be closer to 75 with an auto rear end which uses an aluminum center section.

 

[DivineStrike]

It also looks like they left out the rear sway bar on the sra....so depending on which sway bar is equipped it's only 90 to 100lbs heavier than a PP rearend.

 

[Stuntman]

Damn, I was told 75lbs if I remember correctly.

I thought it was 180lbs for the SLA and 250lbs for the IRS. This was well before the car was even seen though...

Actually, I recall your assumptions quite differently:


http://www.mustang6g.com/forums/newreply.php?do=newreply&p=215233

I cannot see where the weight is coming from, I'll have to wait and see one.

Here is the issue I have with the weight, all of the weight on the ILIRS is UNSPRUNG, if the ILIRS gains 150lbs Mitchell, that would mean the ILIRS has more unsprung weight that the Solid Rear Axle. This is what that math is equaling out to...

Wasn't the solid axle's weight about 188lbs?

Even the sloppy Short-Long Arm IRS is 350lbs, that has an upper and lower cradle and a front and rear cross member, coil-overs, and HUGE disc. I can't see the 150lbs gain...

Still not true. The entire subframe and rear-end (differential) are bolted to the chassis and is SPRUNG weight. About half of the weight of the CV axle shafts and half of the weight of all the control arms (including the aluminum lower arm) is unsprung. I could be wrong but i think the unsprung hubs/uprights are also aluminum.

Either way the ILIRS will have A LOT LESS UNSRUNG weight than a solid axle which the entire thing is unsprung (except half of the weight of the 4 arms -which includes the phb).

The solid axle was weighed at 188lbs (looking for a link), an additional 150lbs puts the ILIRS up in the 350lb range. I don't see it in the diagram, even with the parts that are missing. Maybe 200lbs at most, I see 150lbs, not much more...

as you can see from the diagram, the ILIRS system is 90% unsprung weight... which, is still less than the solid axle AND traditional IRS. As well as weighing less overall.

Any questions on any of this?

I have tried to figure in as much as I can to get the whole ILIRS system to break 200lbs, I have even included the rear end... I can't even get close to 200lbs.

As Grim said above, the Merc Benz W's IRS (almost identical to the Mustang's ILIRS) weighs about 225lbs complete, about 150 as shown in the Mustang diagram. The MB W is a large car, and heavy as well... I just can't see the S550's ILIRS being 350lbs when some of the heaviest IRS (5th Gen Camaro) weighs about that...

I cannot exceed 200lbs and I am even using some of the Fusions steel stamped links for weight instead of Aluminum (they are the same castings). If he said that ILIRS weighed 150lbs, that I could see, without the pumpkin and small front mounted sub-frame, yes... But 150lbs on top of the solid axles 190lbs?

The metal just isn't there...

This is not a 350lbs IRS which makes gaining weight solely from the ILIRS impossible... They may have lost weight in the rear suspension or, very well may have stayed the same. Maybe the Mustang's weight will be exactly the same as the 2014 Mustang. That said, I will still side with Mitchell on the weight although I still am calling it 3380lbs.

I guess not all of your 'insider info' and analysis from your "engineering" background was correct. Or was any of it correct?

Where is the 3,380lb Mustang?

opcorn:

 

[1320']

Nice...actual weight difference numbers are presented and you're still hell bent on this "I was right/no you're wrong" dick swinging contest. Just imagine if we went back to actual specification discussion...

 

[Stuntman]

(Just goes towards credibility)

 

[thePill]

Nice...actual weight difference numbers are presented and you're still hell bent on this "I was right/no you're wrong" dick swinging contest. Just imagine if we went back to actual specification discussion...

Yes, that is his only defense. Because I made a prediction based on what a handful of random sources were giving me details about the structure.... Because I made a guess based on pictures and hearsay, my experience and education must be limited.


Coming from a guy that didn't know leverage had an effect on weight distribution. I prefer to keep him around so I can watch him, laugh at him and make sure he doesn't get out and hurt anyone with his "matter of factly" subject matter. He told me to scale a car... yet had no idea that the tires where an important factor. I think he is also the same guy that had no idea the LS7 was a Corvette engine :(

I had zero information on the content other than the IRS.

He's here because the Camaro can't defend itself in this fight and I am dragging that piece of sh!t through the verbal mud.


Since the z28 is becoming irrelevant, I should mentioned this gem of info I found last week (multiple sources verified, there is also video)

The GT500.......


Was busted running a sub-11 second quarter mile at almost 126mph...

They are disguised as GT350's....

Edit: BTW, where is Mitchell? He told me the ILIRS was 150lbs heavier than the SLA. Mitchell's Inside info was far too heavy. Which is where all this weight guessing started from.


That makes the Mustang's IRS almost 100lbs lighter than the Camaro's. There seems to be a weight gain incoming next Gen in that area based on the ATS-V's unit weight.

The 5th Gen's IRS was 350lbs before the FE4 package or MRC. FE4 and FE5 look to be the standard now and, quite a bit heavier.

The ILIRS should be around 280lbs. That is a pretty large advantage....

I have no idea what Stuntman is trying to prove now. Mitchell claimed the IRS unit was set to be a 350+lbs unit. I challenged that and now we find out I was about 25lbs off. Mitchell was 50lbs over.

We were 75lbs apart and that is a huge difference in the discussion.

With the diagram, I could easily see 200lbs, I just couldn't see the extra 150lbs he was trying to convince you people of... Only to support his 200-300lbs weight gain notion...


Where is that Ford insider now? Gone... and forgotten...

What upsets this guy is that we started weighing the 2015 at pretty much the same weight as the cars we replaced. Mine being a 2011 mind you...

The S550 is at a huge advantage over the S197, the 5th Gen and most likely the 6th due to a sub-optimal footprint and heavier curb weight (and looks like a higher CG).

 

[Strokerswild]

The GT500.......

Was busted running a sub-11 second quarter mile at almost 126mph...

They are disguised as GT350's....

Spill it!

What's the powerplant? Details man, enough of the weight bullshit.....

 

[68fbjjz109]

Wasn't there a forum member who got video of the cars after or before the run, then horsepower kings swiped it.

 

[Todd15Fastback]

Wasn't there a forum member who got video of the cars after or before the run, then horsepower kings swiped it.

Yeah. Evan Smith was driving them.

 

[thePill]

Spill it!

What's the powerplant? Details man, enough of the weight bullshit.....

I am trying... We might have to "weight" for that info though.

 

[mustangletback]

I am trying... We might have to "weight" for that info though.

the big bad BOSS 429,mmm,i wonder.:lol::ford:

 

[thePill]

I think we better start looking at a Twin Turbo Coyote.

Other bad news for GM...

Caddy had an initial weight loss figure from the 2015 CTS-V Coupe to the 2016 ATS-V Coupe. That figure was 650lbs...

The 2016 ATS-V was initially suppose to weigh 650lbs less than the 2015 CTS-V Coupe @ 4120lbs.

The original 2016 ATS-V Coupe was initially under 3500lbs...

However, reality has the figure slighty above 3700lbs. Some are already stating a 3750lbs Curb Weight.

I have no idea where the extra 200lbs came from... They even had some component weight loss and still came out heavy.

I have a feeling the ATS-V's weight will be kept tight lipped until the Camaro's weight is tipped off.


Edit: Salt Lake City Area!!!

Ford Racing School offers a 2015 Mustang course now.

http://www.fordracingschool.com/schools/intro-to-racing.html

$900.58 after taxes...

 

[200MPHCOBRA]

Now we are talking. I just hope its a V8. If not, the Boss is my last car for a long time.

 

[02gtnh]

I think we better start looking at a Twin Turbo Coyote.

Other bad news for GM...

Caddy had an initial weight loss figure from the 2015 CTS-V Coupe to the 2016 ATS-V Coupe. That figure was 650lbs...

The 2016 ATS-V was initially suppose to weigh 650lbs less than the 2015 CTS-V Coupe @ 4120lbs.

The original 2016 ATS-V Coupe was initially under 3500lbs...

However, reality has the figure slighty above 3700lbs. Some are already stating a 3750lbs Curb Weight.

I have no idea where the extra 200lbs came from... They even had some component weight loss and still came out heavy.

I have a feeling the ATS-V's weight will be kept tight lipped until the Camaro's weight is tipped off.


Edit: Salt Lake City Area!!!

Ford Racing School offers a 2015 Mustang course now.

http://www.fordracingschool.com/schools/intro-to-racing.html

$900.58 after taxes...

Where did you read this about the weight?

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