Video : 0-60 mph test
Thread Starter
Le Mans Master
Joined: May 2007
Posts: 8,448
Likes: 27
From: Valparaiso
Video : 0-60 mph test
Since i bumped the timing to 10° car feels much responsive
i will try to get it to 12° with no detonation.
Tried to avoid wheelspin as much as possible
Gradual launch on drag radials at 28 psi.
GTech says 4.94 seconds !
I'm improving !
what you think ?
i will try to get it to 12° with no detonation.
Tried to avoid wheelspin as much as possible
Gradual launch on drag radials at 28 psi.
GTech says 4.94 seconds !
I'm improving !
what you think ?
Thread Starter
Le Mans Master
Joined: May 2007
Posts: 8,448
Likes: 27
From: Valparaiso
What i don't like about the '87 display is the lag that they show the numbers
it's not like one number after another , it jumps from 0 to 30 then 65 or so ...
same thing for the speedometer.
I'm running a 3200 Precision Industries Vigilante
it's not like one number after another , it jumps from 0 to 30 then 65 or so ...
same thing for the speedometer.
I'm running a 3200 Precision Industries Vigilante
Thread Starter
Le Mans Master
Joined: May 2007
Posts: 8,448
Likes: 27
From: Valparaiso
thanks , i think i can do better
i did other launch later , this time full throttle , spinning a lot and i did worst.
So it's all on the launch , find the sweet spot when you don't spin, then
knowing when to floor it , seems like im getting closer to what my combo
is supposed to do.
i did other launch later , this time full throttle , spinning a lot and i did worst.
So it's all on the launch , find the sweet spot when you don't spin, then
knowing when to floor it , seems like im getting closer to what my combo
is supposed to do.
Melting Slicks
Joined: Sep 2010
Posts: 2,422
Likes: 202
Your welcome.. with the initial adavance.. I had plenty of tune time on my HSR
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
2027 Corvette vs The World: Every C8 vs Its Closest Competitor
Joe Kucinski
10 Most Common Corvette Problems of the Last 20 Years!
Joe Kucinski
5 MOST and 5 LEAST Popular Corvette Model Years in History!
Joe Kucinski
2027 Corvette Buyer's Guide: Everything You Need to Know!
Joe Kucinski
10 Things C8 Corvette Owners Hate (But Won't Tell You)
Joe Kucinski
10 Best Corvettes Coming to Barrett-Jackson Palm Beach 2026!
Brett Foote
Every Corvette Grand Sport Explained! (C2, C4, C6, C7, & C8)
Joe Kucinski
Grand Sport & Grand Sport X Launch Alongside All-New 535hp LS6 V8!
Michael S. Palmer
5 Reasons Bad Drivers Crash & 5 Ways to Avoid a Costly Mistake!
Joe Kucinski
Pro
Joined: May 2008
Posts: 670
Likes: 55
Bumping the timing at idle really does help with a bigger cam than stock. I remember when I figured this out with a 400 SBC I built years ago. The thing was a dog at low rpm with stock timing of 6, I finally ended up with 12 if I remember right, it really did wake up the motor.
Thread Starter
Le Mans Master
Joined: May 2007
Posts: 8,448
Likes: 27
From: Valparaiso
Yes, i was told that several times, but i did and felt no difference (maybe because the tranny was going south) so i decided to leave it at 6°.
Forgot about it and adjusted it one year later, im pleased !
i have the 219 Lingenfelter cam :
Stock L98 cam
Duration @ .050", 202/207
Lift: .413/.428 ,
114.5 LSA
219 cam
Duration @ .050", 219/219
Lift: .525/.525 1.6 Rockers
PART NUMBER 74219 GROSS VALVE LIFT INT. 0.525
GRIND GROSS VALVE LIFT EXH. 0.525
ENGINE SBC INTAKE OPEN 32
ROCKER RATIO 1.50 INTAKE CLOSE 68
ROCKER RATIO 1.50 EXHAUST OPEN 76
CAM LIFT INTAKE .350 EXHAUST CLOSE 24
CAM LIFT EXHAUST .350 OVERLAP@ LASH 56
LOBE SEPARATION 112 INTAKE PHASE 108
ADV. OR RET. DEG. 4 ANGLE or CENTERLINE
INTAKE "LASH" DUR. 280
EXHAUST "LASH" DUR. 280 EXHAUST PHASE 116
INTAKE DUR @ .050" 219 ANGLE or CENTERLINE
EXHAUST DUR @ .050" 219
Forgot about it and adjusted it one year later, im pleased !
i have the 219 Lingenfelter cam :
Stock L98 cam
Duration @ .050", 202/207
Lift: .413/.428 ,
114.5 LSA
219 cam
Duration @ .050", 219/219
Lift: .525/.525 1.6 Rockers
PART NUMBER 74219 GROSS VALVE LIFT INT. 0.525
GRIND GROSS VALVE LIFT EXH. 0.525
ENGINE SBC INTAKE OPEN 32
ROCKER RATIO 1.50 INTAKE CLOSE 68
ROCKER RATIO 1.50 EXHAUST OPEN 76
CAM LIFT INTAKE .350 EXHAUST CLOSE 24
CAM LIFT EXHAUST .350 OVERLAP@ LASH 56
LOBE SEPARATION 112 INTAKE PHASE 108
ADV. OR RET. DEG. 4 ANGLE or CENTERLINE
INTAKE "LASH" DUR. 280
EXHAUST "LASH" DUR. 280 EXHAUST PHASE 116
INTAKE DUR @ .050" 219 ANGLE or CENTERLINE
EXHAUST DUR @ .050" 219
Race Director
Joined: Nov 2003
Posts: 12,220
Likes: 446
From: Overland Park Kansas
2020 Corvette of the Year Finalist (appearance mods)
C4 of Year Winner (appearance mods) 2019
I assume you're still running the same bin as you bought from Alvin (a year/two ago)? Not much luck figuring out TunerPro?
Race Director
Joined: Nov 2003
Posts: 12,220
Likes: 446
From: Overland Park Kansas
2020 Corvette of the Year Finalist (appearance mods)
C4 of Year Winner (appearance mods) 2019
Bumping the timing at idle really does help with a bigger cam than stock. I remember when I figured this out with a 400 SBC I built years ago. The thing was a dog at low rpm with stock timing of 6, I finally ended up with 12 if I remember right, it really did wake up the motor.
Thread Starter
Le Mans Master
Joined: May 2007
Posts: 8,448
Likes: 27
From: Valparaiso
Race Director
Joined: Nov 2003
Posts: 12,220
Likes: 446
From: Overland Park Kansas
2020 Corvette of the Year Finalist (appearance mods)
C4 of Year Winner (appearance mods) 2019
Learn how to use TunerPro Sammy. Or, datalog and have Alvin burn another bin. Advancing the dizzy because you gave up on tuning isn't the right way to do this. Seriously. 
If I were to guess. you're running a bit more responsive off-idle...Maybe even faster up to 3k rpms. After that, I bet it feels flat and might be going slower.
If I were to guess. you're running a bit more responsive off-idle...Maybe even faster up to 3k rpms. After that, I bet it feels flat and might be going slower.
Thread Starter
Le Mans Master
Joined: May 2007
Posts: 8,448
Likes: 27
From: Valparaiso
Thanks Gregg , no i have not gave up on that, i will datalog to check what is
exactly going on there. i want the best of my set up and i'm sure we can do better
and that's with fine tuning only !
exactly going on there. i want the best of my set up and i'm sure we can do better
and that's with fine tuning only !
