[SpeedIsLife]

Originally Posted by Bhobbs

If the LT4 does end up in the Z/28, would a supercharged engine be allowed in the same class as the GT350R?

That's what I was wondering also..I'm not sure what the class regulations say about FI motors.

[JAZ]

Originally Posted by SpeedIsLife

I'd like to see the Z/28 get back into the IMSA...after Stevenson bailed on the Camaro they just kind of ...faded away.

However, I doubt a CTSCC Z/28 would be very closely related to a street Z/28, especially if the Z/28 uses MRC and a LT4.

Originally Posted by Bhobbs

If the LT4 does end up in the Z/28, would a supercharged engine be allowed in the same class as the GT350R?

I wish I could find a website that clearly answers these questions, but all my patience has allowed me to find so far are statements like cars have to be approved by the Stéphane Ratel Organisation to meet 2017 GT4 BOP regulations. The manufacturer or their racing program company have to submit the specs for their car for approval, but I can't find what all of those specs are.

I do know that MRC and carbon wheels for example are not allowed, but it is not clear if the production car has MRC for example, can the race prep team simply replace them with regular shocks.

I believe I read somewhere that GT4 cars are BOP'd to meet a specific range of power to weight, but I don't know how this relates to supercharging vs NA and what it would mean for a supercharged LT4.

Are there any more 2017 GT4 knowledgeable fans out there?

[GrimReaperSS]

Well, look at the Z06 in the GT Le Mans. Again Supercharged 6.2 down to an NA 5.5. Im sure similar rules apply....

[artsbest]

$25K off the Z28? I didn't see/hear any Chevy dealer discounting the Z28 at that price.

[SSport16]

Originally Posted by artsbest

$25K off the Z28? I didn't see/hear any Chevy dealer discounting the Z28 at that price.

They had a quite a few that could be had for around $50K.

[Bhobbs]

Originally Posted by GrimReaperSS

Well, look at the Z06 in the GT Le Mans. Again Supercharged 6.2 down to an NA 5.5. Im sure similar rules apply....

I know the C7.R is based on the Z06 chassis but it isn't called Z06.R, like the Z/28.R.

[Sven59]

Originally Posted by JAZ

I wish I could find a website that clearly answers these questions, but all my patience has allowed me to find so far are statements like cars have to be approved by the Stéphane Ratel Organisation to meet 2017 GT4 BOP regulations. The manufacturer or their racing program company have to submit the specs for their car for approval, but I can't find what all of those specs are.

I do know that MRC and carbon wheels for example are not allowed, but it is not clear if the production car has MRC for example, can the race prep team simply replace them with regular shocks.

I believe I read somewhere that GT4 cars are BOP'd to meet a specific range of power to weight, but I don't know how this relates to supercharging vs NA and what it would mean for a supercharged LT4.

Are there any more 2017 GT4 knowledgeable fans out there?

They had to detune the Z/28 because it had too much HP.

[LateBrakeU2]

Originally Posted by Bhobbs

If the LT4 does end up in the Z/28, would a supercharged engine be allowed in the same class as the GT350R?

Not in CTSCC, But PWC. Can't imagine that happening as GM has been running the Caddy brand in that series for years. Personally i would venture a 90% chance if they announce a gen 6Z, it will have F.I., and 50% chance this one that's being spied is an up sell on the ZL1.

[FenwickHockey65]

Originally Posted by Bhobbs

I know the C7.R is based on the Z06 chassis but it isn't called Z06.R, like the Z/28.R.

It's the C7.R Z06 I believe.

[BaylorCamaro]

The Z/28.R and GT350R-C had to both be homologated into CTSC so I would imagine if an LT4 or similar engine was used then it would need to be as well. The CTSC can get by with more as compared to the GTLM or GT-PRO classes in IMSA and WEC, which is why the Corvette's cannot homologate a 6.2L engine.

Originally Posted by FenwickHockey65

It's the C7.R Z06 I believe.

Officially on all of the IMSA literature it just says C7.R however it still retains the Z06 badges. Realistically there isn't a lot in common with the production Z06. The C7.R has wider fenders, different hood, different engine, all the aero is different. The chassis is about the only thing that is the same.

[Bhobbs]

Originally Posted by FenwickHockey65

It's the C7.R Z06 I believe.

Oh, ok. I've never heard it called that. Just C7.R.

[Front Runner]

Nice!!! Looking forward to seeing it shred the GT350R! LOL

[artsbest]

Well I'd say those buyers got a good deal then. Kudos to them.

[RLHMARINES]

Originally Posted by Front Runner

Nice!!! Looking forward to seeing it shred the GT350R! LOL

The Z/28.R won the championship in '15 against a much larger and more diverse field which also included the GT350R in the only year they competed directly against each other.