Carbed timing table
Carbed timing table Have any of you guys had expeirence setting a timing curve for a carbed setup? The curve i have in the car now is at 36* at 6000-6900 rpm.the spark plugs show no signs of detenation at 36* i want to play with the timing some but how much is to much 38*,42*? the track is closed and a havent made it to the dyno yet. knock is hard to detect with no knock sensors and loud exgaust. any info would help me out
TECH Enthusiast
Joined: Sep 2004
Posts: 564
Likes: 0
From: Omaha, NE
You seem a little agressive on timing, on a given head a carb application will not accept as much timing as an EFI application due to a carb's greater cyl to cyl fuel distribution problem. Your 36* would be right in there on the old '60s' iron heads but on todays fast burn combustion chambers, 24-28* is where we would want to be with EFI. The most timing you can run does not usually equate to the most power. Just my opinion of course.
I applaud your experiment. We recently slapped a 5.3 truck motor with the Vic Jr. Intake, holley carb, 224 cam, p/p/ozv heads combo on a 83 foxbody. We used my old 98 pcm to control spark and kept the knock sensors hooked up to set the spark. We ended up with about 32 @ WOT. Ofcourse we had EFI Live and a LC-1 to back up everything else backed up by the dynojet. Bottom line get some instrumentation and the guessing is gone. More power to ya! 
Now how about a intake elbow, TB, and fuel injection rails to up the ante and really spank some unsuspecting folks with your camaro?
Now how about a intake elbow, TB, and fuel injection rails to up the ante and really spank some unsuspecting folks with your camaro?
Or go the other way and see if that GMPP fuel pump /
HEI adapt-em-up kit ever made it to retail... back to
the good ol' days of 1 wire engine management
If it doesn't have to run the injectors there's only
8 reasons left for all that wireball and fussiness.
30 degrees, all in by 3000 is the old school SBC rule
of thumb I think.
HEI adapt-em-up kit ever made it to retail... back to
the good ol' days of 1 wire engine management
If it doesn't have to run the injectors there's only
8 reasons left for all that wireball and fussiness.
30 degrees, all in by 3000 is the old school SBC rule
of thumb I think.
doc I totally agree with you instrumentation = no guessing. so 36* is problably my best bet till i get it on the dyno and/or at the track.dynocar i had the same thoughts as you at first i pulled up my buddys tune in his 99 m6 with a g5x2 and it was at 29* so thats what i put tuned in to msd box,went for a drive and it felt like i had a gooseneck trailer hooked to the bumper,iput the 36* back in it and it felt a lot stronger.so that got me wondering 36* is good! is 38* better? i agree with you too more timing dosnt allways equel more power. thanks for your input
Originally Posted by 6L.IROC-Z
doc I totally agree with you instrumentation = no guessing. so 36* is problably my best bet till i get it on the dyno and/or at the track.dynocar i had the same thoughts as you at first i pulled up my buddys tune in his 99 m6 with a g5x2 and it was at 29* so thats what i put tuned in to msd box,went for a drive and it felt like i had a gooseneck trailer hooked to the bumper,iput the 36* back in it and it felt a lot stronger.so that got me wondering 36* is good! is 38* better? i agree with you too more timing dosnt allways equel more power. thanks for your input
i believe your the guy that runs the cheap street at jackson right? fast car! mine wont be in that class but it will be in some of the "King of the Street" races...
you ran some 5.8x didnt you?
i may see you around..
Trending Topics
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
6 Gifts Neither Your Dad Nor Grad Will Shove Into the 'Trinket Drawer'
Brett Foote
Topdon ONE vs. Artidiag 800 BT2: Which is the Diagnostic Tablet For You?
Pouria Savadkouei
Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine
Verdad Gallardo
7 Most Reliable High-Performance Engines GM Has Ever Built
Verdad Gallardo
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin
Verdad Gallardo
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei