C6 vs. C7 - equal horsepower
02-12-2019, 02:13 PM
#41
Le Mans Master
Honestly, given infinite funds, I think a C5 would be the fastest. It's the lightest, isn't it?
Practically speaking: It's hard to imagine getting a C7 to run faster than a C5 for the same amount of money. $50k in a C5 is a damn fast car. $50k barely covers the cost of a C7. You'd be lucky to get a cage, pads, fluids, seat and harness in a C7 for $50k.
Practically speaking: It's hard to imagine getting a C7 to run faster than a C5 for the same amount of money. $50k in a C5 is a damn fast car. $50k barely covers the cost of a C7. You'd be lucky to get a cage, pads, fluids, seat and harness in a C7 for $50k.
02-12-2019, 02:19 PM
#42
Honestly, given infinite funds, I think a C5 would be the fastest. It's the lightest, isn't it?
Practically speaking: It's hard to imagine getting a C7 to run faster than a C5 for the same amount of money. $50k in a C5 is a damn fast car. $50k barely covers the cost of a C7. You'd be lucky to get a cage, pads, fluids, seat and harness in a C7 for $50k.
Practically speaking: It's hard to imagine getting a C7 to run faster than a C5 for the same amount of money. $50k in a C5 is a damn fast car. $50k barely covers the cost of a C7. You'd be lucky to get a cage, pads, fluids, seat and harness in a C7 for $50k.
You are correct though... a C7 cage is about double a C5 cage currently. It's way cheaper to make a fully blown C5 roadrace car still. But OP wants an Optima car.
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village idiot (02-12-2019)
02-12-2019, 02:25 PM
#43
Le Mans Master
Yeah, I feel like there are multiple questions being answered here.
Anyway, good to know the C7 is lighter than the C5 frame. Why is the whole car so much heavier? Is the C7 gutted lighter than the C5? I figured the C5 had more weight to lose with stuff like pop up headlights. Maybe brakes?
Anyway, good to know the C7 is lighter than the C5 frame. Why is the whole car so much heavier? Is the C7 gutted lighter than the C5? I figured the C5 had more weight to lose with stuff like pop up headlights. Maybe brakes?
02-12-2019, 02:27 PM
#44
Yeah, I feel like there are multiple questions being answered here.
Anyway, good to know the C7 is lighter than the C5 frame. Why is the whole car so much heavier? Is the C7 gutted lighter than the C5? I figured the C5 had more weight to lose with stuff like pop up headlights. Maybe brakes?
Anyway, good to know the C7 is lighter than the C5 frame. Why is the whole car so much heavier? Is the C7 gutted lighter than the C5? I figured the C5 had more weight to lose with stuff like pop up headlights. Maybe brakes?
02-12-2019, 02:35 PM
#45
Yeah, I feel like there are multiple questions being answered here.
Anyway, good to know the C7 is lighter than the C5 frame. Why is the whole car so much heavier? Is the C7 gutted lighter than the C5? I figured the C5 had more weight to lose with stuff like pop up headlights. Maybe brakes?
Anyway, good to know the C7 is lighter than the C5 frame. Why is the whole car so much heavier? Is the C7 gutted lighter than the C5? I figured the C5 had more weight to lose with stuff like pop up headlights. Maybe brakes?
1. Seats are way heavier as they have proper solid metal inernals, 3 vent fans, heating element, airbags. (C5 seats are light, passenger seat is manual in a C5)
2. Direct injection w/ HPFP (none of this is on a C5)
3. Dry sump oiling (not on C5)
4. Larger radiator and oil cooler stock (C5 has a tiny thin radiator and no oil cooler)
5. Stronger uprights, hubs, axles, clutch, etc.
6. Heavier balancer to deal with DOD
7. OEM tans and diff coolers and hoses and ducting.
8. Bigger brakes (rotors and calipers)
9. Retarded heavy Chinese cast OEM wheels
10. EDiff unit with pump, lines, and control computer
That's the bulk of it... there's a photo of a powerpoint floating around the web from when the C7 was released showing the exact differences and where mass was added. I have never seen a "fully gutted" C7, but if you add dry sum and equal coolers to a C5 I'd wager the C7 will be lighter.
Last edited by RapidC84B; 02-12-2019 at 02:35 PM.
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village idiot (02-12-2019)
02-12-2019, 03:27 PM
#46
I was saying all being equal EXCEPT cost.
100% if cost was an issue, the older ones would become a better candidate.
But I wasnt trying to find the best lap time vs $$$ spent.
Im simply tring to find out whic is a better chassis.
Driver mod this, alignment that - none of that I care about at this point.
Which is the better chassis?
excellent exchange of information here and you guys all have great, valid
points.
100% if cost was an issue, the older ones would become a better candidate.
But I wasnt trying to find the best lap time vs $$$ spent.
Im simply tring to find out whic is a better chassis.
Driver mod this, alignment that - none of that I care about at this point.
Which is the better chassis?
excellent exchange of information here and you guys all have great, valid
points.
Honestly, given infinite funds, I think a C5 would be the fastest. It's the lightest, isn't it?
Practically speaking: It's hard to imagine getting a C7 to run faster than a C5 for the same amount of money. $50k in a C5 is a damn fast car. $50k barely covers the cost of a C7. You'd be lucky to get a cage, pads, fluids, seat and harness in a C7 for $50k.
Practically speaking: It's hard to imagine getting a C7 to run faster than a C5 for the same amount of money. $50k in a C5 is a damn fast car. $50k barely covers the cost of a C7. You'd be lucky to get a cage, pads, fluids, seat and harness in a C7 for $50k.
02-13-2019, 02:08 PM
#47
Safety Car
Contact Jason Priestly at JDP....he does the Optimal thing in a C7.
02-13-2019, 02:58 PM
#49
Drifting
Member Since: Nov 2006
Location: Sierra Mtns. The Great State Of Jefferson
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Rich Willhoff (RichieRichZ06) and his wife Carrie both do Optima. Rich has a C6Z and is always a contender. Carrie had a C7Z that she ran in Optima and sold it for a C6ZR1 to run with. Neither one of them liked the C7 as an Optima Challenge car. Real life experience.
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D K (02-13-2019)
02-13-2019, 04:19 PM
#50
Racer
Having owned a bunch of these things including a C7 GS, with equal power in "stock" trim (equal tires with equal or the same driver) in my experience the C7 is faster. I'd suspect that with some mods but once again same tires/driver the C7 would likely still be faster because of the advantages that Brian has spelled out.(not sure he mentioned no lift shift which is another C7 advantage).
I think once you go to full prep the c5/6 will more than hold their own. I'm very curious to see how Brian and others do with prepped C7's as I know for certain he knows his stuff.
Unless I'm leaving someone out I believe most shops that build sportsman Corvettes (other than LG) have typically avoided or recommended against the C7 platform for a W2W car.
I think once you go to full prep the c5/6 will more than hold their own. I'm very curious to see how Brian and others do with prepped C7's as I know for certain he knows his stuff.
Unless I'm leaving someone out I believe most shops that build sportsman Corvettes (other than LG) have typically avoided or recommended against the C7 platform for a W2W car.
02-13-2019, 04:26 PM
#51
Having owned a bunch of these things including a C7 GS, with equal power in "stock" trim (equal tires with equal or the same driver) in my experience the C7 is faster. I'd suspect that with some mods but once again same tires/driver the C7 would likely still be faster because of the advantages that Brian has spelled out.(not sure he mentioned no lift shift which is another C7 advantage).
I think once you go to full prep the c5/6 will more than hold their own. I'm very curious to see how Brian and others do with prepped C7's as I know for certain he knows his stuff.
Unless I'm leaving someone out I believe most shops that build sportsman Corvettes (other than LG) have typically avoided or recommended against the C7 platform for a W2W car.
I think once you go to full prep the c5/6 will more than hold their own. I'm very curious to see how Brian and others do with prepped C7's as I know for certain he knows his stuff.
Unless I'm leaving someone out I believe most shops that build sportsman Corvettes (other than LG) have typically avoided or recommended against the C7 platform for a W2W car.
Or am I doing something wrong? Does the car have to be in a different drive mode? My C7 doesn't have PTM and I just turn all the do-dads off. I run it in track mode for the steering feel. AH/TC turned full off.
02-13-2019, 04:38 PM
#52
Racer
Whenever I've used the NLS I'd be in race mode. I haven't run the car in a number of months however for sure it wouldn't shoot up to onto the limiter when I'd shift which would normally be up very close to 6500 when I'd use it. If I get a chance I'll check out one of my video's to see what the rpm drop was(I don't recall it losing a lot of revs).
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RapidC84B (02-13-2019)
02-13-2019, 04:46 PM
#53
Whenever I've used the NLS I'd be in race mode. I haven't run the car in a number of months however for sure it wouldn't shoot up to onto the limiter when I'd shift which would normally be up very close to 6500 when I'd use it. If I get a chance I'll check out one of my video's to see what the rpm drop was(I don't recall it losing a lot of revs).
I bet shifting at 6500ish it feels like "no lift shift" because you're already right at limiter and now that it's a soft limiter it functions like no lift shift. I admit I really like it at VIR just holding 4th on the straights. You don't abuse the valve train; it's very smooth.
02-13-2019, 08:28 PM
#54
I tested it once on the highway... I floored it in 3rd, kept my foot on the floor, and tried to shift at 4K rpms.... it didn't like that I bet shifting at 6500ish it feels like "no lift shift" because you're already right at limiter and now that it's a soft limiter it functions like no lift shift. I admit I really like it at VIR just holding 4th on the straights. You don't abuse the valve train; it's very smooth.
I bet shifting at 6500ish it feels like "no lift shift" because you're already right at limiter and now that it's a soft limiter it functions like no lift shift. I admit I really like it at VIR just holding 4th on the straights. You don't abuse the valve train; it's very smooth.https://youtu.be/FzHfR7aKr6U
Last edited by BrunoTheMellow; 02-13-2019 at 08:31 PM.
02-13-2019, 09:30 PM
#55
No. That's not it but it's completely unnecessary to do at the track. When you no lift shift it's a fairly obvious sound. Almost like the sound the car makes when stability control kicks in. Check this.
https://youtu.be/FzHfR7aKr6U
https://youtu.be/FzHfR7aKr6U
02-13-2019, 09:48 PM
#56
02-13-2019, 10:40 PM
#57
02-14-2019, 06:21 PM
#58
02-14-2019, 08:40 PM
#59
02-14-2019, 09:17 PM
#60
More content across the board:
1. Seats are way heavier as they have proper solid metal inernals, 3 vent fans, heating element, airbags. (C5 seats are light, passenger seat is manual in a C5)
2. Direct injection w/ HPFP (none of this is on a C5)
3. Dry sump oiling (not on C5)
4. Larger radiator and oil cooler stock (C5 has a tiny thin radiator and no oil cooler)
5. Stronger uprights, hubs, axles, clutch, etc.
6. Heavier balancer to deal with DOD
7. OEM tans and diff coolers and hoses and ducting.
8. Bigger brakes (rotors and calipers)
9. Retarded heavy Chinese cast OEM wheels
10. EDiff unit with pump, lines, and control computer
That's the bulk of it... there's a photo of a powerpoint floating around the web from when the C7 was released showing the exact differences and where mass was added. I have never seen a "fully gutted" C7, but if you add dry sum and equal coolers to a C5 I'd wager the C7 will be lighter.
1. Seats are way heavier as they have proper solid metal inernals, 3 vent fans, heating element, airbags. (C5 seats are light, passenger seat is manual in a C5)
2. Direct injection w/ HPFP (none of this is on a C5)
3. Dry sump oiling (not on C5)
4. Larger radiator and oil cooler stock (C5 has a tiny thin radiator and no oil cooler)
5. Stronger uprights, hubs, axles, clutch, etc.
6. Heavier balancer to deal with DOD
7. OEM tans and diff coolers and hoses and ducting.
8. Bigger brakes (rotors and calipers)
9. Retarded heavy Chinese cast OEM wheels
10. EDiff unit with pump, lines, and control computer
That's the bulk of it... there's a photo of a powerpoint floating around the web from when the C7 was released showing the exact differences and where mass was added. I have never seen a "fully gutted" C7, but if you add dry sum and equal coolers to a C5 I'd wager the C7 will be lighter.