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So my single cab silverado likes about 32 degrees timing NA. I have 150 shot of nitrous on it and I'm trying to improve my mph and time slip a little. I'm pulling 13.0/ high 12. Im putting 5.5 degrees of timing back in the truck on the spray. Do you guys think my numbers would improve a bit if I put a little more timing back in it. Was thinking of putting the 200hp jets in it but wanted to see if timing would help me first. Oh and the truck runs on e85. Thanks
What’s done to this engine first off? 32 degrees on a ls engine? How much timing have you pulled for the 150 shot if you are adding back 5.5 degrees?
-5.3 SBE iron block
-243 heads CNC port polished and milled .030
-660 dual spring kit with trunion upgrade
-btr stage 3 218/224 .553/.553 110+0 cam
-mellings oil pump
-102 mm intake & throttle body
-42 lb injectors (gm flex fuel) on e85
-6an feed and return fuel lines, aeromotive 340 pump & regulator
-410 gears with mini spools
--4l65 tranny with shift kit and external cooler
- and it has dual fans on a Nelson harness
- nitrous outlet 102 mm plate kit, its on 150 now, as stated thinking of going up to 200. Im aiming for low 12s. I may be missing a few things but that's the basics of the truck.
my tuner has the truck pulling 32 degrees NA through HPTUNERS, i have a lnc2000 for the timing on the nitrous and for 150 shot he set it at 5.5
What do the plugs look like? That seems like a lot of timing already. You could even pick up pulling more timing if its unhappy where it is now. What does it run at the track? Is is consistent? Trying pulling a degree or two and see if it gains ET or MPH, then go the other way until it doesnt gain anymore. Read the plugs tho. You can always add timing, but you can't pull timing after the engine lets go. No one can say yes or no if you can add or not.
What do the plugs look like? That seems like a lot of timing already. You could even pick up pulling more timing if its unhappy where it is now. What does it run at the track? Is is consistent? Trying pulling a degree or two and see if it gains ET or MPH, then go the other way until it doesnt gain anymore. Read the plugs tho. You can always add timing, but you can't pull timing after the engine lets go. No one can say yes or no if you can add or not.
the plugs actually look pretty clean, forgranted I just put them a few weeks ago. So on my lnc2000 add a few degrees it what your saying. Maybe go to about 8 or 10 and work my way back to 6? This time was me not spraying 1st gear and it coming on in 2nd from a windows switch because it was spinning bad. I've ordered a progressive controller and new tires and hoping to play with the timing and get it down in the 12s
the plugs actually look pretty clean, forgranted I just put them a few weeks ago. So on my lnc2000 add a few degrees it what your saying. Maybe go to about 8 or 10 and work my way back to 6? This time was me not spraying 1st gear and it coming on in 2nd from a windows switch because it was spinning bad. I've ordered a progressive controller and new tires and hoping to play with the timing and get it down in the 12s
Dont have to go that much. make a run as is, then pull like 2 more and try to do everything exactly the same. See if it picks up, if not, go back the other way. add a degree from your original 6 and see if it picks up. definitely work on your short track tho. that is going to make the biggest difference.
work on the 60ft before anything else. suspension, tires, practice etc
it was spinning bad off the line, I couldn't spray 1st. I ordered some mickey thompson ee street R , I have some already but they were getting a bit of age.
Dont have to go that much. make a run as is, then pull like 2 more and try to do everything exactly the same. See if it picks up, if not, go back the other way. add a degree from your original 6 and see if it picks up. definitely work on your short track tho. that is going to make the biggest difference.
ok I'll try that, I'm going back next weekend so ill do those things and see if it helps. I picked up a progressive controller and new tires so now I should be able to spray off the line so I'm hoping that will help. That and a little more seat time as well. I've only took the truck to the track a few times
Last edited by Tommy42088; Jun 11, 2023 at 11:40 AM.
Yeah man 32 degrees seems a bit high for me, what's your Compression on that motor ?
personally the way I would go about it would be drop the timing 26-28 dial in the MPH N/A till you find the sweet spot, any access to a Dyno?
Pull the recommended timing from there with the LNC with a fresh set of plugs, run it spray it and shut it off right after your run, coast it and pull the plugs and go from there. I think e85 plugs will look different, maybe someone can chime in on that
Also what plugs are you running?
don't get into the ego battle of a lower time by just upping the shot right away, you need consistency on the 150 shot
it's better to take a month figuring out your combo vs 6 months of having to start all over because you popped the motor lol
Yeah man 32 degrees seems a bit high for me, what's your Compression on that motor ?
personally the way I would go about it would be drop the timing 26-28 dial in the MPH N/A till you find the sweet spot, any access to a Dyno?
Pull the recommended timing from there with the LNC with a fresh set of plugs, run it spray it and shut it off right after your run, coast it and pull the plugs and go from there. I think e85 plugs will look different, maybe someone can chime in on that
Also what plugs are you running?
don't get into the ego battle of a lower time by just upping the shot right away, you need consistency on the 150 shot
it's better to take a month figuring out your combo vs 6 months of having to start all over because you popped the motor lol
I'm not sure what the compression is man honestly, I can do most of the wrench turning aspects of mechanic work but when it comes to stuff like that I really don't know to much. 32 degrees is just what I was told. I wouldn't know how to verify that.
its a 5.3 sbe besides ls7 lifters, 243 heads port polished and milled .030, 102 mm intake and throttle body, btr stage 3 truck cam 218/224.553/.553 110+0, .050 head gasket from summit, dual springs 660 and trunion upgrade, fuel is an aeromotive 340 pump with 6an lines with aeromotive regulator and 42 lb flex fuel injectors on e85, 4l65 transmission, Detroit 410 gears with mini spools, and its a nitrous outlet plate kit with a nitrous outlet winmax and nitrous express progressive controller and the lnc2000 for timing and 2 step, also has a 3800 converter, ngk br7ef plugs. The truck made 400 to the back tire NA, and went mid 13s and on the 200 shot progressing in at 2.5 seconds it went the 11.9 number. Best mph was 116. Sounds like I need to learn how to use hp tuners. It seems very complicated tho
For the record ive never seen my tuner pull my plugs when he tunes my truck so maybe I need to either find someone else or learn to do it myself. Vs racing told me 2 grand for a 78/75 turbo kit so I may just buy that and do away with all this nitrous stuff
Your combo is healthy for sure, but for how long is my worry.
I think you're close to figuring it out, tackle suspension, invest in some caltracs, look through the forums on Performancetrucks.net to figure out how they're planting it down
As far as with your tuner, does he LOG your runs?
Tuning just requires time to learn, even if you don't wanna mess with the engine, you can mess with your shift points and log stuff yourself so you can upload them and people way smarter than me can help 🤓
Boost is amazing if you can hook 😄
Forgot to add, can you lose any weight on the truck? Maybe have your tuner raise the shifts up a little
Your combo is healthy for sure, but for how long is my worry.
I think you're close to figuring it out, tackle suspension, invest in some caltracs, look through the forums on Performancetrucks.net to figure out how they're planting it down
As far as with your tuner, does he LOG your runs?
Tuning just requires time to learn, even if you don't wanna mess with the engine, you can mess with your shift points and log stuff yourself so you can upload them and people way smarter than me can help 🤓
Boost is amazing if you can hook 😄
Forgot to add, can you lose any weight on the truck? Maybe have your tuner raise the shifts up a little
my suspension is all done as well, the only thing o don't have is the caltracs, it's 2/4 dropped as well, frame is c knocked with plates welded in and I'm on 305/45/r17 mickey thompson et street R on the back. When I dropped the tire pressure to around 25 pounds it hooks fairly decent on the track. On the street it has its moments. My shift points are set at 6450 and I'm guessing he logs them. When he tunes it I just drop the truck off and he puts it on the dyno and then when I pick it up he gives me a print out of what it made. Any time I take it back for changes he makes the adjustments fairly easily if that helps. And yeh I've been looking at alot of kits but I'm just not to sure which one to go with. I don't want to have to weld all kinds of **** up and I don't wanna spend an arm and a leg either. If I found something that would be pretty much a bolt up kit for a few grand then that would be the route I would choose. There's just so many different turbos and all the places I call don't really seem to be alot of help.
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Timing and nitrous 
