Homepage Garage Wiki Register Members List Social Groups Calendar Search Today's Posts Mark Forums Read
#Camaro6
Go Back   CAMARO6 > Engine | Drivetrain | Powertrain Technical Discussions > V8 LT1 Engine, Exhaust, and Bolt-Ons


BeckyD @ James Martin Chevy


Post Reply
 
Thread Tools
Old 02-25-2021, 08:59 PM   #127
oldman


 
Drives: SS 6 speed of course
Join Date: Jan 2016
Location: Hilo, HI
Posts: 4,151
I run E85 on sub 600 lift cam and boost, think my rev limiter is at 7250 RPM, I shift at 6900ish. I did the 7250 for 0-60 bragging rights with M6 as there is no shifting needed given my slightly taller tires drag radials.. cheeezzeee I know, just say it is very close to C8 times... There is no reason to push the engine that high, mine was a specific objective.
__________________
Forged short block, large duration sub .600 lift Cam Motion cam, 7200 RPM fuel cut, Pray Ported Heads, 3.85 pulley D1X, stage II intercooler, DSX secondary low side, DSX E85 sensor, Lingenfelter big bore 2.0 pump, ported front cats, 60608 Borla, LT4 injectors, ZL1 1LE driveshaft and Katech ported TB, ported MSD intake, BTR valvetrain, ARP studs, ProFlow valves, PS4 tires.
oldman is offline   Reply With Quote
Old 02-25-2021, 10:27 PM   #128
cmitchell17

 
Drives: 17 2SS, 8L90, Cam, Heads, E85
Join Date: Dec 2016
Location: US
Posts: 873
Quote:
Originally Posted by oldman View Post
I run E85 on sub 600 lift cam and boost, think my rev limiter is at 7250 RPM, I shift at 6900ish. I did the 7250 for 0-60 bragging rights with M6 as there is no shifting needed given my slightly taller tires drag radials.. cheeezzeee I know, just say it is very close to C8 times... There is no reason to push the engine that high, mine was a specific objective.
I generated my own torque curve and ran it through some optimization calculators, and it came up with right at 7000 rpms, I think you need at least 250 rpms (if your shift MPH's are right on) to not hit the rev limiter if your tires lose traction in 1st and you have to upshift.
cmitchell17 is offline   Reply With Quote
Old 02-26-2021, 12:40 PM   #129
oldman


 
Drives: SS 6 speed of course
Join Date: Jan 2016
Location: Hilo, HI
Posts: 4,151
The only way to get close or under 3.0 0-60 with 100 wear tires is to not shift on the M6, this can be done on the Zl1's M6 (different first gear), other than 0-60 times, there is little reason to rev the engine past 7000 RPM. A 1LE in a tight road race may carry that RPM in some situations probably in 2nd or 3rd. Back to 0-60 times no matter how good you are at shifting IMO of course, 3.6 to 3.8 is about the best you can do M6 0-60 and shifting 1st to 2nd.
__________________
Forged short block, large duration sub .600 lift Cam Motion cam, 7200 RPM fuel cut, Pray Ported Heads, 3.85 pulley D1X, stage II intercooler, DSX secondary low side, DSX E85 sensor, Lingenfelter big bore 2.0 pump, ported front cats, 60608 Borla, LT4 injectors, ZL1 1LE driveshaft and Katech ported TB, ported MSD intake, BTR valvetrain, ARP studs, ProFlow valves, PS4 tires.
oldman is offline   Reply With Quote
Old 02-26-2021, 01:56 PM   #130
cmitchell17

 
Drives: 17 2SS, 8L90, Cam, Heads, E85
Join Date: Dec 2016
Location: US
Posts: 873
Quote:
Originally Posted by oldman View Post
The only way to get close or under 3.0 0-60 with 100 wear tires is to not shift on the M6, this can be done on the Zl1's M6 (different first gear), other than 0-60 times, there is little reason to rev the engine past 7000 RPM. A 1LE in a tight road race may carry that RPM in some situations probably in 2nd or 3rd. Back to 0-60 times no matter how good you are at shifting IMO of course, 3.6 to 3.8 is about the best you can do M6 0-60 and shifting 1st to 2nd.
Are you running on stock exhaust with stock cats?

Best I could do was 3.13, thats with rollout. I have never been able to put down full traction with a brake stall. This is stock converter NT555R2's. I even tried 3.73 gears and results were basically exactly the same, I couldn't really tell if I was spinning more with 3.73s but I think I was.

Last edited by cmitchell17; 02-26-2021 at 02:17 PM.
cmitchell17 is offline   Reply With Quote
Old 02-26-2021, 02:05 PM   #131
parish8

 
Drives: 17 SS a8
Join Date: Feb 2010
Location: omaha
Posts: 1,596
Quote:
Originally Posted by oldman View Post
The only way to get close or under 3.0 0-60 with 100 wear tires is to not shift on the M6, this can be done on the Zl1's M6 (different first gear), other than 0-60 times, there is little reason to rev the engine past 7000 RPM. A 1LE in a tight road race may carry that RPM in some situations probably in 2nd or 3rd. Back to 0-60 times no matter how good you are at shifting IMO of course, 3.6 to 3.8 is about the best you can do M6 0-60 and shifting 1st to 2nd.
Is this your opinion on a street car or the lt in general? some of the fastest ls people I know spin their junk to over 8000rpm. These are 99% strip cars.
__________________
760 rwhp at 11psi, 6.48@113 1/8th mile, stock motor
1096 rwhp at 22psi, 5.94@122 1/8th(18psi), 9.19@155 1/4(20psi), drop in rods and pistons
Twins build http://www.camaro6.com/forums/showthread.php?t=465472
parish8 is online now   Reply With Quote
Old 02-26-2021, 02:18 PM   #132
cmitchell17

 
Drives: 17 2SS, 8L90, Cam, Heads, E85
Join Date: Dec 2016
Location: US
Posts: 873
Quote:
Originally Posted by parish8 View Post
Is this your opinion on a street car or the lt in general? some of the fastest ls people I know spin their junk to over 8000rpm. These are 99% strip cars.
Besides the valvetrain what is the other weak links?
cmitchell17 is offline   Reply With Quote
Old 02-26-2021, 07:28 PM   #133
s346k

 
s346k's Avatar
 
Drives: 18 1SS 1LE
Join Date: Jun 2012
Location: indiana
Posts: 1,192
Quote:
Originally Posted by oldman View Post
3.6 to 3.8 is about the best you can do M6 0-60 and shifting 1st to 2nd.
i did multiple 3.8 in an 18 1LE, all stock with exception to full exhaust, ported stock intake manifold and tune. i have no doubt the car is capable of harder launches:

a) not on a broken county road
b) with more power
c) with a smaller diameter, sticky tire
__________________
2016+ camaro: everyone’s first car
s346k is offline   Reply With Quote
Old 02-26-2021, 09:52 PM   #134
KingLT1


 
KingLT1's Avatar
 
Drives: 2016 1SS NFG A8
Join Date: Aug 2017
Location: 46804
Posts: 4,170
Need to use a dragy and not the performance page to measure 0-60.

My best so far from a second gear launch on the street is 3.05 or 2.84 with rollout like the C8 performance page measures. That's how they are reporting such good 0-60 times.
Attached Images
 
__________________
2016 NGM 1SS A8
Options-[2SS Leather/NPP]
Perf. mods-[Whipple 2.9/LT4-LPE-JMS Fueling/LT5 TB/Rotofab Big Gulp/Flex Fuel/CA ORP/FM NPP Axle back]
KingLT1 is offline   Reply With Quote
Old Yesterday, 08:57 PM   #135
cmitchell17

 
Drives: 17 2SS, 8L90, Cam, Heads, E85
Join Date: Dec 2016
Location: US
Posts: 873
Quote:
Originally Posted by KingLT1 View Post
Need to use a dragy and not the performance page to measure 0-60.

My best so far from a second gear launch on the street is 3.05 or 2.84 with rollout like the C8 performance page measures. That's how they are reporting such good 0-60 times.
I think the performance page on the Camaro reports out with NHRA rules? I know I always thought it didn't use 1 foot rollout because I heard someone else say it didn't (but maybe that was on C7) anyway it always perfectly matches the Draggy's 1 foot rollout time though?

I was never able to get full traction with my NT555R2s, I always have to let it roll out for about .25-.5 seconds before I go full throttle. Funny enough I think this was my fastest 1/8th mile and this was right before it decided to eat its own intake valve haha
Name:  Screenshot_20210227-204904.jpg
Views: 52
Size:  61.1 KB

Name:  Screenshot_20210227-204827.jpg
Views: 53
Size:  60.8 KB

Also anyone know anyway I can change the title to this thread? I was going to change it to broken stock intake valve seats, so at least someone else could locate it easier through a search?
cmitchell17 is offline   Reply With Quote
Old Yesterday, 09:45 PM   #136
arpad_m


 
arpad_m's Avatar
 
Drives: 2018 Camaro 2SS
Join Date: Jul 2017
Location: NJ
Posts: 4,408
Quote:
Originally Posted by cmitchell17 View Post
Also anyone know anyway I can change the title to this thread? I was going to change it to broken stock intake valve seats, so at least someone else could locate it easier through a search?
If you edit your initial post with the advanced editor (press the "Go Advanced" button after clicking "Edit"), it'll allow you to change the title. I do this all the time with my classifieds.
__________________
2018 Camaro 2SS
G7E A8 NPP MRC NAV
Magnuson Heartbeat TVS2300 | Roto-Fab CAI | JMS PowerMAX voltage booster
Soler LT5 95mm TB | 1LE replica wheels | BMR rear cradle lockout | Jannetty Racing custom tune
1100 - 1/30/18 | 2000 - 1/31/18
3000 - 2/06/18 TPW 2/26/18
3400 - 2/19/18 | 3800 - 2/26/18
4300 - 2/27/18 | 4B00 - 3/01/18
4200 - 3/05/18 | 4800 - 3/14/18
5000 - 3/16/18 | 6000 - 3/19/18
arpad_m is offline   Reply With Quote
Old Yesterday, 11:56 PM   #137
cmitchell17

 
Drives: 17 2SS, 8L90, Cam, Heads, E85
Join Date: Dec 2016
Location: US
Posts: 873
Quote:
Originally Posted by arpad_m View Post
If you edit your initial post with the advanced editor (press the "Go Advanced" button after clicking "Edit"), it'll allow you to change the title. I do this all the time with my classifieds.
Thanks, I changed it so it will help someone find it if they are searching for things on the topic. I know I have never heard of valve seats, especially intake valve seats, failing when putting in a cam or after a valve job or even on stock LT1 applications.
cmitchell17 is offline   Reply With Quote
Old Today, 09:57 AM   #138
KingLT1


 
KingLT1's Avatar
 
Drives: 2016 1SS NFG A8
Join Date: Aug 2017
Location: 46804
Posts: 4,170
Quote:
Originally Posted by cmitchell17 View Post
I think the performance page on the Camaro reports out with NHRA rules? I know I always thought it didn't use 1 foot rollout because I heard someone else say it didn't (but maybe that was on C7) anyway it always perfectly matches the Draggy's 1 foot rollout time though?

I was never able to get full traction with my NT555R2s, I always have to let it roll out for about .25-.5 seconds before I go full throttle. Funny enough I think this was my fastest 1/8th mile and this was right before it decided to eat its own intake valve haha
Attachment 1060115

Attachment 1060116

Also anyone know anyway I can change the title to this thread? I was going to change it to broken stock intake valve seats, so at least someone else could locate it easier through a search?
Yea 6th gen performance page doesn't use roll out but you can "trick" it to get better times with some wheel spin due to the performance page using wheel speed vs time instead of gps vs time like the Dragy. So it's more accurate in that regard.

I have to do the same thing on the street. I brake stall to 2k rpm, let off brake, let it roll out a bit then put it to the floor from second gear. That has netted me a 1.75 60ft, 6.9 @ 107mph in the 1/8.
__________________
2016 NGM 1SS A8
Options-[2SS Leather/NPP]
Perf. mods-[Whipple 2.9/LT4-LPE-JMS Fueling/LT5 TB/Rotofab Big Gulp/Flex Fuel/CA ORP/FM NPP Axle back]
KingLT1 is offline   Reply With Quote
 
Post Reply

Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -5. The time now is 04:38 PM.


Powered by vBulletin® Version 3.8.9 Beta 4
Copyright ©2000 - 2021, vBulletin Solutions, Inc.