When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
Power seemed low. According to mph and weight. About 435 hp at 10 psi and 500 hp at 14 psi at 4000 da. 5.3 aluminum 10:1 243 heads ls6 intake sloppy stage 2 vsracing 78/75. 93 pump with boost juice. 3450 with me in it. Here is my timing and afr.
I'd like to start off by saying I'm not a Holley guy , but trying to help. I can't see the rpm on one of the tables but it looks like you could be be at - 2 psi , 14.7 afr and 36° timing , that could easily cause some knock and depending on how quickly it brings back timing that could cause a poor run and low numbers. I'm sure some experienced holley guys can send you a better timing table and help with tuning the knock sensors. Hope this helps a little
I think ur timing is low as u get into boost...i generally run close to NA timing up to about 4-5psi then start pulling. At only 10psi AND meth I would run more than 12*...not sure thats ur entire problem cause there maybe other mechanical **** going on.
Edit i just took another look and saw u have about 15*...i would run more either way since u have meth.
Were you at the track, or on a dyno-500 doesnt seem way out of line-I never got as much as some report on dynos, of course they all claim theres reads low, lol.
Were you at the track, or on a dyno-500 doesnt seem way out of line-I never got as much as some report on dynos, of course they all claim theres reads low, lol.
Track using drag calculator. 3450 lbs with me 4000 da. Ran 118 mph in 1/4 on 10 lbs and 123 on 14 psi.
I think ur timing is low as u get into boost...i generally run close to NA timing up to about 4-5psi then start pulling. At only 10psi AND meth I would run more than 12*...not sure thats ur entire problem cause there maybe other mechanical **** going on.
Edit i just took another look and saw u have about 15*...i would run more either way since u have meth.
Would you think 2 degrees all across the board from wot and up? Or more.
I agree the timing seems low. The sloppy rule of 14@14 has always been my go to for starting a tune. i also dont start pulling timing until 5-6psi as someone above mentioned.
I would try to get another 4 degrees of timing out of it. Granted I run 9.5:1 CR, but I run 8 degrees at 24psi....I ran 14 degrees at 14psi and like 17 degrees at 10psi.
I would bet you're just timed way to soft. Maybe 11.2 AFR for 14psi and higher too once you bring the timing up.
edit: I run this timing on 60/40 water/meth injection. I probably should have said that.
Last edited by LetsTurboSomething; Jul 28, 2020 at 02:44 PM.
^^^^ his timing at -2 psi is 25 not 36. Your boost timing might be fine but you could be getting KR as you approach boost then it may take a few sec to return to normal. Logging will help
Read the plugs. Too many variables. Your commanded timing may be 16*. But unless you have confirmed TDC and that your ECU is firing at the correct commanded time, you may be at 18* or 13* or whatever. Plugs don't lie.
make sure you verify timing with a light. your timing is a little low but not crazy however if your actually 3 degrees retarded of what your commanding your probably leaving 100-130hp on the table at the same boost level.
from there read plugs and creep up on it until it doesn't go faster at the same boost level.
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Slideshow: From wobbling harmonic balancers to failed EBCMs, these are the issues that define long-term C5 ownership and what repairs typically involve.
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Slideshow: A modern Camaro transformed into a retro icon, this limited-run "Bandit" build blends nostalgia with brute force in a way few revivals manage.
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Slideshow: Cadillac didn't just crash the high-performance luxury vehicle party, it showed up loud, supercharged, and occasionally a little unhinged...
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Slideshow: A one-off sports car that looks like a vintage Italian exotic-but hides a C6 Corvette underneath-just sold for the price of a new mid-engine Corvette.
First time out disappointed need help 
