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.
PROBLEM FOUND!!!!What timing are you guys running on a 5.3 ??im t6 with a treadstone so iat is good 120* max. Running under 16* now at 12.0 afr 18 psi boost . Car is .6 slower than my 6.0 builds at same tune level.
Last edited by yenkomike; Oct 30, 2021 at 11:53 AM.
I think you may have answered your own question; Your .6 tenths off of your 6.0L builds with a 5.3L? Seems like your missing the CI. As far as timing goes, what fuel?
It runs good just not like I think it should. Going to do a timing pointer and check that out and go from there. Runs 10 teens easily with a 1.49 60. Same exact tune and launch with a 6.0 went 1.38 and 9.40-50s. Time to swap in my ly6 I guess
I’m working on it but I feel it’s off a little . Not bad but a few tenths . It will go 9.90s with a hard launch I’m sure . I bet it is the same weight as Ron’s nova no more. It’s a full 2009 lc9 with a jfr 216/222 cam and a 80/96 Borg billet. Spools good 7 psi in .6 sec on 2 step and 18 psi in 1.6 seconds from floored. Ptc 17.0 and 3.42 gear
Ron I typically run 11.7 ish on these but my last couple seem to mph better on 12.0 . Afr. Made one pass yesterday track was packed so I left . Wanted more tune time . Floored it at top amber so I got .6 before green on 2 step left on green at 6.5 psi went 1.49 / 6.50 @106. 10.19 @132. 18.2 psi/ 16 degrees timing. A 12 lb launch will surely get me a 1.3x. And a 9.xx but 132 mph is low . Should be 138 +.
I don't think there is an answer here. Just treat timing like a a low/high dial. Watch plugs and power/MPH. As soon as I stop seeing big gains per degree, I stop adding timing. I like to see at least .75 mph per degree. Ive picked up as much as 2mph off 1*. Not an exact science for sure. A load dyno would likely be the best place to dial it in. There is a definite sweet spot. Valve events, load, elevation, DA, and a many other variables all come into play.
Last edited by Forcefed86; Oct 5, 2021 at 01:06 PM.
I was at 20* at 18psi on my SBE 5.3. Just my experience. I believe we dropped it to 18* at 24psi. My tuner felt that was on the aggressive side. I told him to send it. Setup ran strong as hell tho.
The more built the engine, the more timing I've seen my tuner run. Big difference for him 'tween an SBE and a forged motor with aftermarket thicker deck heads.
What timing are you guys running on a 5.3 ??im t6 with a treadstone so iat is good 120* max. Running under 16* now at 12.0 afr 18 psi boost . Car is .6 slower than my 6.0 builds at same tune level.
more pics of the car! exterior and engine bay! love it
Nice car! as mentioned previously the 5.3 is going to take more boost to run the same as a 6.0 would. AFR seems lean and it's definitely soft on timing.
Only proper answer is check the plugs! Not sure why people routinely risk engines over a $16 set of plugs. Be friends with your plugs! Especially when you have your dick beaters all over the keyboard.
Originally Posted by Pro Stock John
The more built the engine, the more timing I've seen my tuner run. Big difference for him 'tween an SBE and a forged motor with aftermarket thicker deck heads.
Built engines don't like detonation either. My built engine has a good bit higher compression than my SBE so to blindly give it more timing wouldn't work out very well. In all reality you usually end up running less timing on built stuff since there's no point to buying forged parts with thick deck heads unless you are gonna lay the pipe to it.
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.
E85 timing 
