What Would Be Your Ultimate C7 Track Car Build?
01-10-2019, 09:34 PM
#161
The 2019 GS 1LT M7 with PDR I ordered from Mike Furman should be built by now so I hope to have it in the next week or two. I have a bunch of parts on the way and plan to start with installing the suspension and brakes myself. I'll post a link here to the build thread once I get started. I've decided to call this the "C7 GS.R".
Last edited by grandsport2017; 01-10-2019 at 10:20 PM.
01-11-2019, 07:35 AM
#162
Track Rat
Thread Starter
Probably not in pure stock form and I'm kind of anxious to get this build done before track season gets in full swing. However, I do plan to do suspension and brakes myself and might get it to the track before I send it off for motor, trans, and aero. Summit Point just announced three track days in February so that might give me an opportunity to shake down the car in stages. I had bad experience the last time I went to the track in the cold though. We'll see.
01-11-2019, 08:17 AM
#163
Probably not in pure stock form and I'm kind of anxious to get this build done before track season gets in full swing. However, I do plan to do suspension and brakes myself and might get it to the track before I send it off for motor, trans, and aero. Summit Point just announced three track days in February so that might give me an opportunity to shake down the car in stages. I had bad experience the last time I went to the track in the cold though. We'll see.
Last edited by BrunoTheMellow; 01-11-2019 at 08:17 AM.
01-11-2019, 08:21 AM
#164
Thanks everyone for the suggestions and I completely understand the rationale for a lighter low power car but it's just not what I'm interested in right now. However, I did just pick up a Civic Type R and plan to do a little track time in that while I get this project sorted so it'll be interesting to try a lighter FWD car.
Good suggestions on the classing piece. A major reason to try out TT is because it is pretty much impossible to get clean laps in HPDE with this pace to set a time and understand if you're improving. The only way I've found to do it is to grid up first and then hold the group behind me for a lap while I warm the tires and then go. I might be get one lap if nobody entered the track late. I also never considered myself competitive but recently I did an autocross and realized that when put in that environment I get very competitive. We'll see if I actually find that fun or not.
I've been thinking and I should be able to limit power on the LT1 427 just by reducing the rev limiter. That should allow me to detune the car to TT1 if I want without any mechanical changes. Exactly how much I need to lower the revs will depend greatly on the final weight with my big **** in the car but I only plan on doing that if I'm way off the pace in TTU.
The 2019 GS 1LT M7 with PDR I ordered from Mike Furman should be built by now so I hope to have it in the next week or two. I have a bunch of parts on the way and plan to start with installing the suspension and brakes myself. I'll post a link here to the build thread once I get started. I've decided to call this the "C7 GS.R".
Good suggestions on the classing piece. A major reason to try out TT is because it is pretty much impossible to get clean laps in HPDE with this pace to set a time and understand if you're improving. The only way I've found to do it is to grid up first and then hold the group behind me for a lap while I warm the tires and then go. I might be get one lap if nobody entered the track late. I also never considered myself competitive but recently I did an autocross and realized that when put in that environment I get very competitive. We'll see if I actually find that fun or not.
I've been thinking and I should be able to limit power on the LT1 427 just by reducing the rev limiter. That should allow me to detune the car to TT1 if I want without any mechanical changes. Exactly how much I need to lower the revs will depend greatly on the final weight with my big **** in the car but I only plan on doing that if I'm way off the pace in TTU.
The 2019 GS 1LT M7 with PDR I ordered from Mike Furman should be built by now so I hope to have it in the next week or two. I have a bunch of parts on the way and plan to start with installing the suspension and brakes myself. I'll post a link here to the build thread once I get started. I've decided to call this the "C7 GS.R".
The first time I did TT it felt weird to do such short sessions, but to me it’s worth it. One thing to note, if you’re an instructor you can also run HPDE-4 sessions in addition to TT (although technically you’re not supposed to). I will usually take a student with me to justify it.
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Poor-sha (01-11-2019)
01-11-2019, 08:41 AM
#165
Melting Slicks
Member Since: Jun 2005
Location: Rochester NY
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2018 C6 of Year Finalist
St. Jude Donor '10, '17
Thanks everyone for the suggestions and I completely understand the rationale for a lighter low power car but it's just not what I'm interested in right now. However, I did just pick up a Civic Type R and plan to do a little track time in that while I get this project sorted so it'll be interesting to try a lighter FWD car.
Good suggestions on the classing piece. A major reason to try out TT is because it is pretty much impossible to get clean laps in HPDE with this pace to set a time and understand if you're improving. The only way I've found to do it is to grid up first and then hold the group behind me for a lap while I warm the tires and then go. I might be get one lap if nobody entered the track late. I also never considered myself competitive but recently I did an autocross and realized that when put in that environment I get very competitive. We'll see if I actually find that fun or not.
I've been thinking and I should be able to limit power on the LT1 427 just by reducing the rev limiter. That should allow me to detune the car to TT1 if I want without any mechanical changes. Exactly how much I need to lower the revs will depend greatly on the final weight with my big **** in the car but I only plan on doing that if I'm way off the pace in TTU.
The 2019 GS 1LT M7 with PDR I ordered from Mike Furman should be built by now so I hope to have it in the next week or two. I have a bunch of parts on the way and plan to start with installing the suspension and brakes myself. I'll post a link here to the build thread once I get started. I've decided to call this the "C7 GS.R".
Good suggestions on the classing piece. A major reason to try out TT is because it is pretty much impossible to get clean laps in HPDE with this pace to set a time and understand if you're improving. The only way I've found to do it is to grid up first and then hold the group behind me for a lap while I warm the tires and then go. I might be get one lap if nobody entered the track late. I also never considered myself competitive but recently I did an autocross and realized that when put in that environment I get very competitive. We'll see if I actually find that fun or not.
I've been thinking and I should be able to limit power on the LT1 427 just by reducing the rev limiter. That should allow me to detune the car to TT1 if I want without any mechanical changes. Exactly how much I need to lower the revs will depend greatly on the final weight with my big **** in the car but I only plan on doing that if I'm way off the pace in TTU.
The 2019 GS 1LT M7 with PDR I ordered from Mike Furman should be built by now so I hope to have it in the next week or two. I have a bunch of parts on the way and plan to start with installing the suspension and brakes myself. I'll post a link here to the build thread once I get started. I've decided to call this the "C7 GS.R".
I'm also an instructor with NASA in the NE and if you can make it to their first HPDE event at the Glen in late April and run HPDE4 (I realize it is a LONG haul for you) you will have your TT license in no time (unless you already have laid out plans). Happy to chat offline so I don't clutter up your thread any further.
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Poor-sha (01-11-2019)
01-11-2019, 09:16 AM
#166
Track Rat
Thread Starter
While I agree with you in principle the reality is that it would delay getting started at least 2-3 weeks and even then conditions at my closest track (Summit Point) would be far from optimal. Fortunately I have lots of data already from my FE6 Z06 both with and without the DSC controller, my FE7 Z06, and the ZR1.
01-11-2019, 09:34 AM
#167
While I agree with you in principle the reality is that it would delay getting started at least 2-3 weeks and even then conditions at my closest track (Summit Point) would be far from optimal. Fortunately I have lots of data already from my FE6 Z06 both with and without the DSC controller, my FE7 Z06, and the ZR1.
01-11-2019, 10:07 AM
#168
What color GS did you get? Did you get stage 3 aero or get a stripper so you can do it all yourself?
Regarding NASA TT... if you're fast you get 2-3 laps max. You "get it done" on lap 1 or 2 if you're on As and pit. Otherwise you hit the back markers and you're done. It's a huge rush for me. In some regards I like it more that W2W racing; both are different.
Please start a build thread with the GS and keep us in the loop. I'm very close to going full track build with my C7 and buying a convertible for the street.
Regarding NASA TT... if you're fast you get 2-3 laps max. You "get it done" on lap 1 or 2 if you're on As and pit. Otherwise you hit the back markers and you're done. It's a huge rush for me. In some regards I like it more that W2W racing; both are different.
Please start a build thread with the GS and keep us in the loop. I'm very close to going full track build with my C7 and buying a convertible for the street.
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Poor-sha (01-11-2019)
01-11-2019, 02:21 PM
#170
Safety Car
Jason (toilets) should have some good insight as he has a completely built c7z. His build thread is on here somewhere.
Last edited by heavychevy; 01-11-2019 at 02:21 PM.
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Poor-sha (01-11-2019)
01-12-2019, 07:43 AM
#171
Sr.Random input generator
If I were you, I'd still want to get a baseline data, first. This car will not be identical to your other C7s, and benchmarking from stock would give you all the data you need.
Besides, if you finish all mods at once and quickly stop being able to improve your times, where is the fun??
Besides, if you finish all mods at once and quickly stop being able to improve your times, where is the fun??
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village idiot (01-12-2019)
01-12-2019, 10:08 PM
#172
Melting Slicks
I’m late to the party but I’ll contribute what I think would make for a sweet and inexpensive grand sport build.
Personally I’d keep the standard j56 brakes I’ve really yet to see people over drive these especially with rikhek using them with no issue. Most of the AP weight savings is simply from the rear rotor running an aluminum center vs the factory steel, all we need is someone to machine a new center and you’d have 75% of the rear weight savings for 10% of the cost. For the fronts the weight savings is in the calipers so you’d have to run those if you really needed the 12lb savings over iron j56 brakes.
AC delete -20lbs?
hooker shorty headers -19lbs
norcal deletes -12lbs?
keep OEM x pipe to meet sound
braille g30 lithium battery -32lbs
seats -50lbs
BMS filter
forged wheels -25lbs
slick tires -15lbs??
that’s 173lbs off for not much money. Pulling all the carpet might save another 15lbs
Personally I’d keep the standard j56 brakes I’ve really yet to see people over drive these especially with rikhek using them with no issue. Most of the AP weight savings is simply from the rear rotor running an aluminum center vs the factory steel, all we need is someone to machine a new center and you’d have 75% of the rear weight savings for 10% of the cost. For the fronts the weight savings is in the calipers so you’d have to run those if you really needed the 12lb savings over iron j56 brakes.
AC delete -20lbs?
hooker shorty headers -19lbs
norcal deletes -12lbs?
keep OEM x pipe to meet sound
braille g30 lithium battery -32lbs
seats -50lbs
BMS filter
forged wheels -25lbs
slick tires -15lbs??
that’s 173lbs off for not much money. Pulling all the carpet might save another 15lbs
01-13-2019, 07:15 AM
#174
Le Mans Master
Member Since: Jul 2008
Location: 200 AGL
Posts: 9,554
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St. Jude Donor '15
The Katech lightweight flywheel would be a viable option for me if you’re going to do internal engine work as well. That saves another 24 pounds. The Akrapovic titanium exhaust would help too.
Last edited by 64drvr; 01-13-2019 at 07:28 AM.
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Poor-sha (01-13-2019)
01-13-2019, 10:52 AM
#175
Drifting
Member Since: Jun 2016
Posts: 1,266
Received 310 Likes
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213 Posts
2020 Corvette of the Year Finalist (track prepared)
C7 of Year Winner (track prepared) 2019
so just gonna throw this out there since we're taking about weight
my car without driver and half tank of gas is 3215 (2015 1LT Z51)
removed:
carpet
interior panels
mufflers
passenger seat race seat,
OEM seatbelts
speakers
Dash trim molding
door windows
door internals
door trim
engine cover
Z51 spoiler
added:
splitter frame/splitter (birch plywood)
Rear wing/uprights
full cage
kill switch
replaced:
wheels/tires (forgeline GA3R w/Hoosier R7)
driver seat (sparco sprint)
MSRC w/LG G2 coilovers
secondary cats (w/XPipe)
swaybars w/LG swaybars
battery (AGM battery so not a huge weight savings)
front calipers/rotors (J56 on front)
transparent top w/Carbon fiber top
things to remove in the future
rest of dash
AC
entire wiring harness (swap with full motec)
my car without driver and half tank of gas is 3215 (2015 1LT Z51)
removed:
carpet
interior panels
mufflers
passenger seat race seat,
OEM seatbelts
speakers
Dash trim molding
door windows
door internals
door trim
engine cover
Z51 spoiler
added:
splitter frame/splitter (birch plywood)
Rear wing/uprights
full cage
kill switch
replaced:
wheels/tires (forgeline GA3R w/Hoosier R7)
driver seat (sparco sprint)
MSRC w/LG G2 coilovers
secondary cats (w/XPipe)
swaybars w/LG swaybars
battery (AGM battery so not a huge weight savings)
front calipers/rotors (J56 on front)
transparent top w/Carbon fiber top
things to remove in the future
rest of dash
AC
entire wiring harness (swap with full motec)
The following users liked this post:
Poor-sha (01-13-2019)
01-13-2019, 11:15 AM
#176
so just gonna throw this out there since we're taking about weight
my car without driver and half tank of gas is 3215 (2015 1LT Z51)
removed:
carpet
interior panels
mufflers
passenger seat race seat,
OEM seatbelts
speakers
Dash trim molding
door windows
door internals
door trim
engine cover
Z51 spoiler
added:
splitter frame/splitter (birch plywood)
Rear wing/uprights
full cage
kill switch
replaced:
wheels/tires (forgeline GA3R w/Hoosier R7)
driver seat (sparco sprint)
MSRC w/LG G2 coilovers
secondary cats (w/XPipe)
swaybars w/LG swaybars
battery (AGM battery so not a huge weight savings)
front calipers/rotors (J56 on front)
transparent top w/Carbon fiber top
things to remove in the future
rest of dash
AC
entire wiring harness (swap with full motec)
my car without driver and half tank of gas is 3215 (2015 1LT Z51)
removed:
carpet
interior panels
mufflers
passenger seat race seat,
OEM seatbelts
speakers
Dash trim molding
door windows
door internals
door trim
engine cover
Z51 spoiler
added:
splitter frame/splitter (birch plywood)
Rear wing/uprights
full cage
kill switch
replaced:
wheels/tires (forgeline GA3R w/Hoosier R7)
driver seat (sparco sprint)
MSRC w/LG G2 coilovers
secondary cats (w/XPipe)
swaybars w/LG swaybars
battery (AGM battery so not a huge weight savings)
front calipers/rotors (J56 on front)
transparent top w/Carbon fiber top
things to remove in the future
rest of dash
AC
entire wiring harness (swap with full motec)
01-13-2019, 11:23 AM
#177
Drifting
Member Since: Jun 2016
Posts: 1,266
Received 310 Likes
on
213 Posts
2020 Corvette of the Year Finalist (track prepared)
C7 of Year Winner (track prepared) 2019
Did your ST2 car have the factory wiring in it still?
what diameter tubing was used for the C5? was it slightly smaller diameter since the car was already lighter?
The rear glass is the next thing to go on this car. my goal is to get a RACE weight of 3300 (currently 3400)
01-13-2019, 07:39 PM
#178
Track Rat
Thread Starter
so just gonna throw this out there since we're taking about weight
my car without driver and half tank of gas is 3215 (2015 1LT Z51)
removed:
carpet
interior panels
mufflers
passenger seat race seat,
OEM seatbelts
speakers
Dash trim molding
door windows
door internals
door trim
engine cover
Z51 spoiler
added:
splitter frame/splitter (birch plywood)
Rear wing/uprights
full cage
kill switch
replaced:
wheels/tires (forgeline GA3R w/Hoosier R7)
driver seat (sparco sprint)
MSRC w/LG G2 coilovers
secondary cats (w/XPipe)
swaybars w/LG swaybars
battery (AGM battery so not a huge weight savings)
front calipers/rotors (J56 on front)
transparent top w/Carbon fiber top
things to remove in the future
rest of dash
AC
entire wiring harness (swap with full motec)
my car without driver and half tank of gas is 3215 (2015 1LT Z51)
removed:
carpet
interior panels
mufflers
passenger seat race seat,
OEM seatbelts
speakers
Dash trim molding
door windows
door internals
door trim
engine cover
Z51 spoiler
added:
splitter frame/splitter (birch plywood)
Rear wing/uprights
full cage
kill switch
replaced:
wheels/tires (forgeline GA3R w/Hoosier R7)
driver seat (sparco sprint)
MSRC w/LG G2 coilovers
secondary cats (w/XPipe)
swaybars w/LG swaybars
battery (AGM battery so not a huge weight savings)
front calipers/rotors (J56 on front)
transparent top w/Carbon fiber top
things to remove in the future
rest of dash
AC
entire wiring harness (swap with full motec)
The following users liked this post:
Poor-sha (01-14-2019)
01-14-2019, 12:02 AM
#180
it is a fat pig of a car.
Did your ST2 car have the factory wiring in it still?
what diameter tubing was used for the C5? was it slightly smaller diameter since the car was already lighter?
The rear glass is the next thing to go on this car. my goal is to get a RACE weight of 3300 (currently 3400)
Did your ST2 car have the factory wiring in it still?
what diameter tubing was used for the C5? was it slightly smaller diameter since the car was already lighter?
The rear glass is the next thing to go on this car. my goal is to get a RACE weight of 3300 (currently 3400)
