GT500 and the Z06

[415ZR1]

First, props on the 415 CI 4v. That's badass any way you slice it:thumbsup:

You also have to take into account aerodynamics at that speed, and although I don't have the data in front of me I'd be willing to bet that the C6 Z06 has a smaller frontal area and lower Cd.

Thanks, I appreciate the thumbs up. Gotta love 4v DOHC motors. :beer:

The new Z06 does have better aero than my ZR-1 C4. However, mine is lowered 3 inches so the CD difference is less when compared to a stock C4. Needless to say I was very impressed with them (06 Z06). The only things he had done to his car to get 542 rwhp was headers/cam and tune.

When the GT500 starts being sold at msrp and people compare buying a standard Corvette coupe (low 40's) and the GT500 (low 40's) I think there is going to be some brand crossover.

BTW, does anyone know how many 06 GT500's were built and how many they plan on building for 07?

 

[dgussin1]

they didn't build any gt500's in 06, and they will build between 7-10K in 07.

 

[415ZR1]

they didn't build any gt500's in 06, and they will build between 7-10K in 07.

Thanks, I thought it was an 07 only but wasn't sure.
How do you like your's? What do you like and what would you change (besides the side mirrors)

 

[PilledV8s]

I have raced a few modded 06 Z06's and they are surprising to say the least. Whats is suprising to me is how much 300 lbs makes a big difference. That's the difference between my 90 ZR-1 (3,440 lbs) and the new Z06 (3,150 lbs)

I raced a modded one on the highway from a 60 mph roll. Same hp (~540 rwhp) each). By the time I was at the top of 4th gear (132 mph) he had me by a car. By the time we got to 175 mph he had me by 4 cars. The only difference is the 300 lbs I was giving away.

Out of the box the GT500 would have a up hill battle to stay close to a new Z06. Guy's, 800+ lbs's is 800+ lbs's. It's like having 2 fat Albert's in the car.

Now with that said, I really like the supercharged 5.4 DOHC motor. As you can see in my sig, I am a sucker for dual overhead cams. Plus, you will be able to get 600 rwhp with minimal mods from the GT500.

I also love the GT500 styling. It looks like a mean car. I am an old Mustang guy back in the fox body days. I have build several (600 + rwhp supercharged fox bodied Mustangs)

I am actually thinking of buying one once the mania is over. It took about 10 months for the new Z06's to go msrp. I would never pay dealer markup's just to have a car first. There are many people that will and I guess thats ok too.

My hats off to Ford for building the GT500. I also am glad that the Zo6 was built. Looks like we are living in the best times when it comes to muscle cars. Gotta love that.

There are lots of factors/variable that come into play between the cars. 1st being the heads. The LS7 heads flow insane (360-370cfm @ .600 stock & 385-390 cfm @ .600 ported). I'm almost positive that those LT5 don't flow anywhere near that, which gives the edge to the Z06 at higher and explains why it pulled 4 cars on the ZR1 at 175. The Z06 is breathing much better and much easier up there. I doubt the ZR1 has the same gearing, I'd like to know that also. But it dosen't surprise me that the Z06 pulled away up top, also that 540rwhp number is STD. What are the SAE numbers for the ZR1? And was the 540 rwhp number of the Z06 SAE or STD??

 

[PilledV8s]

Thanks, I appreciate the thumbs up. Gotta love 4v DOHC motors. :beer:

The new Z06 does have better aero than my ZR-1 C4. However, mine is lowered 3 inches so the CD difference is less when compared to a stock C4. Needless to say I was very impressed with them (06 Z06). The only things he had done to his car to get 542 rwhp was headers/cam and tune.

When the GT500 starts being sold at msrp and people compare buying a standard Corvette coupe (low 40's) and the GT500 (low 40's) I think there is going to be some brand crossover.

BTW, does anyone know how many 06 GT500's were built and how many they plan on building for 07?

Yup, That'll do it and that's a small - mid sized cam also.

Anyone have any pictures of a GT500 with purple HIDs?

 

[415ZR1]

also that 540rwhp number is STD. What are the SAE numbers for the ZR1? And was the 540 rwhp number of the Z06 SAE or STD??

The dyno sheet on my blog is old.
latest numbers on my car is 540 rwhp sae and 502 rwtq sae.
His numbers I assume were sae.
My heads are CNC ported so they flow as well as the stock LS7 heads. The difference in the race was gearing (above 132 mph) and weight in my opinion. Plus showing stock ls7 head flow numbers at .600 lift is meaningless. What are the flow #'s at .500 lift? Mine flow close to 360 cfm @ 0.450 lift...........the beauty of 4 valves.

 

[ON D BIT]

Wow, I didn't know that sound system was 100 lbs.

Gearing did hurt me a little when I went into 5th @ 132 and he was still in fourth. I run 4:09 gears and I think the Z06 has 3:45 gears or somewhere close to that. Even though it's 700 lbs thats still alot to overcome. However, you guys put some exhaust and smaller pulley's with a tune and you might just surprise a few. ;-)

its about 60 to 70lbs heavier. fully gassed full optioned stock gt500 coupe has weighed in at 3910lbs. the you have dgussins coupe weighing in at 3850lbs with full options and 3/4 tank. whats the difference in the wieght of the drive shafts dave(the two piece is stock right)? and was that weight before or after you dropped the car?

 

[PilledV8s]

The dyno sheet on my blog is old.
latest numbers on my car is 540 rwhp sae and 502 rwtq sae.
His numbers I assume were sae.
My heads are CNC ported so they flow as well as the stock LS7 heads. The difference in the race was gearing (above 132 mph) and weight in my opinion. Plus showing stock ls7 head flow numbers at .600 lift is meaningless. What are the flow #'s at .500 lift? Mine flow close to 360 cfm @ 0.450 lift...........the beauty of 4 valves.

OK, i didn't know you had your heads done as well... I agree, the gearing, the weight, aerodynamics and also the LS7s meaty and broad torque band helped him pull so much at 175. Here are some numbers on ported LS7 heads:
4.100 bore flowed at true 28" vacuum.

intake
lift ported stock ported w ported intake
.100 77 69 n/a
.200 162 166 n/a
.300 259 245 259
.400 314 299 307
.500 352 340 326
.600 376 362 347
.650 386 360 356
.670 388 n/a 363
.700 392 360 367

exhaust (flowed reverse through kooks 1 7/8 header)
lift ported
.100 58
.200 121
.300 167
.400 208
.500 243
.600 252
.650 256
they are flowing over 360 cfm w/ the intake attached
i hope this is helpful

 

[415ZR1]

No doubt those heads are flowing like gangbusters. The LS7 does have a well designed head. Did they just improve on the LS1 "cathedral" port design?
Regardless, the car is a monster and a lot faster than I thought they would be.

OK, i didn't know you had your heads done as well... I agree, the gearing, the weight, aerodynamics and also the LS7s meaty and broad torque band helped him pull so much at 175. Here are some numbers on ported LS7 heads:
4.100 bore flowed at true 28" vacuum.

intake
lift ported stock ported w ported intake
.100 77 69 n/a
.200 162 166 n/a
.300 259 245 259
.400 314 299 307
.500 352 340 326
.600 376 362 347
.650 386 360 356
.670 388 n/a 363
.700 392 360 367

exhaust (flowed reverse through kooks 1 7/8 header)
lift ported
.100 58
.200 121
.300 167
.400 208
.500 243
.600 252
.650 256
they are flowing over 360 cfm w/ the intake attached
i hope this is helpful

 

[Fourcam330]

LT5 Heads > LS7 Heads. A ported Ford GT head will outflow an aftermarket ported LS7 head on the intake, and slaughter it on the exhaust up to .550", that's with a 3.57" bore vs. 4.125". 4Vs don't need more than .500" lift and velocity is near double that of a comparable 2V head.

 

[Fourcam330]

OK, i didn't know you had your heads done as well... I agree, the gearing, the weight, aerodynamics and also the LS7s meaty and broad torque band helped him pull so much at 175. Here are some numbers on ported LS7 heads:

You don't think a 415CI LT5 has a broad torque band? The advantage to a 4v isn't peak power, it's area under the curve due to a longer powerband.

 

[PilledV8s]

You don't think a 415CI LT5 has a broad torque band? The advantage to a 4v isn't peak power, it's area under the curve due to a longer powerband.

Im not that updated on 4V Chevy motors in the LT5, but 415ZR1 is feeding some good information and specs to me. I didn't know ported LT5 heads flowed that well...

 

[PilledV8s]

LT5 Heads > LS7 Heads. A ported Ford GT head will outflow an aftermarket ported LS7 head on the intake, and slaughter it on the exhaust up to .550", that's with a 3.57" bore vs. 4.125". 4Vs don't need more than .500" lift and velocity is near double that of a comparable 2V head.

What does a ported Ford GT head flow on both sides??

 

[TacticalKaos]

When GM or Dodge finally get around to building a car that is in the same catagory as the GT500. Since they have no similar vehicle they are jealous and have to rag on what we have by comparing two totally different types of vehicles.

Why would they ever do that? They're competing to see who will file Chapter 13 first.

 

[BlackBolt9]

Why would they ever do that? They're competing to see who will file Chapter 13 first.

Ohhh I vote this in for stupid post of the week! :loser:

Well to explain it out...
They are both working on producing cars in the GT500 catagory (2 door 4 seat pony/muscle car) GM = Camaro Dodge = Challenger

Maybe thats why I said, "When they finally get around to building a car in the same catagory".

 

[Fourcam330]

What does a ported Ford GT head flow on both sides??

At .500" lift you're looking at 360-370cfm intake and 280-290cfm exhaust with killer velocity. While the intake #s are somewhat comparable to an LS7 head, you have to remember you're only filling 330CI vs. 427CI. Pretty sporty;-)

 

[TacticalKaos]

Ohhh I vote this in for stupid post of the week! :loser:

Well to explain it out...
They are both working on producing cars in the GT500 catagory (2 door 4 seat pony/muscle car) GM = Camaro Dodge = Challenger

Maybe thats why I said, "When they finally get around to building a car in the same catagory".

I was kidding but with all do respect GM needs to do something as do all American car companies. Foreign companies have taken a huge market share. Nonetheless where the hell is the Challenger?

 

[BlackBolt9]

I was kidding but with all do respect GM needs to do something as do all American car companies. Foreign companies have taken a huge market share. Nonetheless where the hell is the Challenger?

Oh ok, I retract my stupid post comment then. You need to use a smiley or something geez this internet thing doesn't express sarcasm well :-D

I agree to a point, it is good to see the American companies at least trying to edge out the foreign cars even if they don't make it. I agree... that Challenger concept was gorgeous. I have a hard time deciding if I like it or the S197's better and I am a Ford guy for the most part.

 

[TacticalKaos]

Oh ok, I retract my stupid post comment then. You need to use a smiley or something geez this internet thing doesn't express sarcasm well :-D

I agree to a point, it is good to see the American companies at least trying to edge out the foreign cars even if they don't make it. I agree... that Challenger concept was gorgeous. I have a hard time deciding if I like it or the S197's better and I am a Ford guy for the most part.

Yeah, e-communication has it's issues. The new Cobra, bad ass. The new Z06, fawking awesome. The new SRTs, sweet. The new STis and EVO 9 MRs......bad ass........and about 20K cheaper on the average. I would have a new Z06 or Cobra or a 300C SRT or something but I'm a college kid in the Army so therefore, I can't afford it. My STi won't beat a lot of stuff but it sure as hell makes for some competition. I love American cars but they're damn expensive for the quality you get.

 

[Mr Rx-7 tt]

Ranger is about/trying to hit 10s BONE STOCK on drag radials.....that's why he hasn't done anything to it.

10.85 @ 129.50 New Best for a Bone-stock C6Z06 on DOT Drag Radials

http://forums.corvetteforum.com/showthread.php?t=1541575