[BlaqWhole]

If anyone can pull off a high revving high HP NA 5.5 DOHC FPC engine it would be GM. But after seeing the disaster that was the Voodoo engine I gotta say I would prefer if they did a safe FI engine. I fully trust them tho and I definitely would buy one.

[BlaqWhole]

Originally Posted by whiteboyblues2001

You really are the only person I have encountered on the internet (expecially in a forum environment), that I actually WOULD pay to hear your opinion!

What about me? I accept Paypal, Venmo, Zelle, Facebook pay, cash, check, money order...

[rocket403]

Found this Video on the GT500 comparing it to the 67 GT500, they didn't really run the old 500 that hard and i get it, as it is a very valuable car but 15.24 LOL

My 80 Cutlass when I had the 307 in it would run a low 15 and my little 5.7 in my RT would kill that time.

I thought Ford was talking about the 2020 GT500 being able to kill the Demon I really don't see that as a possibility, this is a low 11 to high 10 car and might be hard to beat the Redeye.

[rocket403]

Here is a good Video on the Redeye I would take the Redeye over the 500 if I was looking to spend over 90k I could see the Mustang with ADM's costing people in the 150k Range for the next year or so.

[whiteboyblues2001]

Originally Posted by Martinjlm

And then there's this....

The new TR-9080 DCT family combines TREMEC’s experience in manufacturing robust high performance transmissions with leading-edge mechatronics and software. “This new transmission represents a massive investment in resources to create the best DCT in the world,” commented Global Business Development Director Dave Hadley. The design covers the performance envelope from high performance sports cars to super-cars and is suitable for rear-wheel drive applications. The first mLSD and eLSD versions will handle input speeds up to 7,500 RPM and torque capacity of 800 Nm (590 lb-ft), with higher performance and efficiency versions in development.

My interpretation of all this is

• TR-9080 family implies there will be more than just this one. Whether for another customer application (Tremec will certainly hope so) or more Corvette models isn't clear
• It's rated to 7,500 rpm....right in the zone for a high revving FPC
• Other higher performance and efficiency variants in development. <cough*** ZR1 hybrid *** cough> Makes TR-9080 family just a little more clear.

Thanks for this info.

My appologies, I originally wrote that a 5.5L N/A engine would need 7k RMPs, but I meant 9k RPMs. My bad. I went back and corrected my original post.

7,500 RPMs is not going to be enough to make 600 HP out of 5.5L. But, a 5.5L engine would also not put out anywhere near 590 lbft of torque. Can you run a trans to higher RPMs if you have less than max torque? I'm not sure about that one.

[Martinjlm]

Originally Posted by whiteboyblues2001

Thanks for this info.

My appologies, I originally wrote that a 5.5L N/A engine would need 7k RMPs, but I meant 9k RPMs. My bad. I went back and corrected my original post.

7,500 RPMs is not going to be enough to make 600 HP out of 5.5L. But, a 5.5L engine would also not put out anywhere near 590 lbft of torque. Can you run a trans to higher RPMs if you have less than max torque? I'm not sure about that one.

Sometimes when I'm trying to "guesstimate" the output for an engine I think is coming, I use an online HP modeler. This is what I got trying to model the 5.5L NA.

• The yellow highlights are the factors that I changed in the model
• The red circled items are the results I was trying to achieve. I wanted to get to close to the same bore / stroke ratio as LT1 (1.12 I think). Wanted to stay near a 4.00" bore. I also went with 12 bar since that's what the model estimates for a high performance 4-stroke engine. I put in 7,500 rpm limit of 8DCT and that gave me a piston speed of 21.27 m/s. Piston speed in the model for a performance engine is 18 m/s, 22 for a race engine with some endurance. 21.27 m/s to achieve 7,499 seems reasonable.
• A 5.5L engine is roughly 334 ci. I could probably stand to reduce the bore a little bit to bring the b/s ratio down a bit and bring the displacement down a bit, but given that this iteration got me just over 600 hp, I assume 600 is the target.

[NW-99SS]

Originally Posted by whiteboyblues2001

Thanks for this info.

My appologies, I originally wrote that a 5.5L N/A engine would need 7k RMPs, but I meant 9k RPMs. My bad. I went back and corrected my original post.

7,500 RPMs is not going to be enough to make 600 HP out of 5.5L. But, a 5.5L engine would also not put out anywhere near 590 lbft of torque. Can you run a trans to higher RPMs if you have less than max torque? I'm not sure about that one.

5.2l Voodoo makes its peak HP @ 7200rpm. 5.5l doesn't need 9K rpm, and will make at least 550hp below 7500rpm given no improvement to Voodoo VE (volumetric efficiency).

Edit: Nevermind, Martin beat me to it with the math to back it up!

[DaveC113]

IMO... I think the trans will be rated for higher RPMs for the Z06, I can't see a FPC V8 "only" revving to 7500 rpm and 600 hp isn't enough.

[whiteboyblues2001]

Originally Posted by Martinjlm

Sometimes when I'm trying to "guesstimate" the output for an engine I think is coming, I use an online HP modeler. This is what I got trying to model the 5.5L NA.

• The yellow highlights are the factors that I changed in the model
• The red circled items are the results I was trying to achieve. I wanted to get to close to the same bore / stroke ratio as LT1 (1.12 I think). Wanted to stay near a 4.00" bore. I also went with 12 bar since that's what the model estimates for a high performance 4-stroke engine. I put in 7,500 rpm limit of 8DCT and that gave me a piston speed of 21.27 m/s. Piston speed in the model for a performance engine is 18 m/s, 22 for a race engine with some endurance. 21.27 m/s to achieve 7,499 seems reasonable.
• A 5.5L engine is roughly 334 ci. I could probably stand to reduce the bore a little bit to bring the b/s ratio down a bit and bring the displacement down a bit, but given that this iteration got me just over 600 hp, I assume 600 is the target.

Thanks for the great info, especially the HPWizard resource! But, of course, now I am going to go down the rabbit hole with this website. I love to learn.

So, it seems as though 600HP is doable at 7500RPMs with a 5.5L, but it's closer to race engine spec in terms of piston speed. Maybe they will go with a bit more oversquare on the b/s ratio to reduce the piston speed enough to rev it a bit higher.

Either way, I can't wait to see what comes out...

[shaffe]

Originally Posted by hotlap

Amazing.

In the initial write up, where MT claimed to have measured 561 HP, 515 lb-ft, they describe their phone calls to the Chevy “engineers” asking them to speculate on why the measured numbers were high.

What really makes it even sadder is they ran it like what 6 times? And in 6 pulls couldn't figure out they had it set to read for an AWD car.

Originally Posted by BlaqWhole

If anyone can pull off a high revving high HP NA 5.5 DOHC FPC engine it would be GM. But after seeing the disaster that was the Voodoo engine I gotta say I would prefer if they did a safe FI engine. I fully trust them tho and I definitely would buy one.

That sounds like blind faith to me lol. To say the only ones who can do it is GM when it's going to be their first try?

I mean it would/will be cool to see it but personally I would have a little more faith in someone that has built FPCs before than someone that has never done it.

[RobbyBeefcake87]

I don't remember where but a while ago I had seen someone post the specs to two different tr 9080s... I assumed the higher torque rated one was for a later model... Maybe it wasn't a finalized product. It's safe to assume the current one won't be the one used in higher output models imo

[Martinjlm]

Originally Posted by RobbyBeefcake87

I don't remember where but a while ago I had seen someone post the specs to two different tr 9080s... I assumed the higher torque rated one was for a later model... Maybe it wasn't a finalized product. It's safe to assume the current one won't be the one used in higher output models imo

Not sure about TR-9080, but there are two sets of specs for TR-9070 (GT500)

[RobbyBeefcake87]

Originally Posted by Martinjlm

Not sure about TR-9080, but there are two sets of specs for TR-9070 (GT500)

Maybe, it was a similar spec sheet to that, but I do remember it having 8 gears and having a different torque capacity for each though.

[RobbyBeefcake87]

I've hears negative things on YouTube about the gt500s somewhat long gearing for a dct compared to a pdk or something, but I like it. Easy to manual shift without having to shift non stop and it sounds like a traditional manual reving through the gears not shifting non stop like an a10. Plus the gt500 has the wide power band to able to work with long-ish gearing. On top of that, the last 3 years being overdrives helps out with gas efficiency for those that will daily them.

I'm a fan and have the delusional hope that maybe they'll make a manual KR version with a TR 7070 and similar gearing.