Tips on getting spool time down?
Tips on getting spool time down? Looking through the logs of my best run I think I see why my trap speed and E.T. don't match (6.13@117mph).
My turbo is taking a long time to get up to speed. I left with just under 4psi on the 2 step set at 3200rpm (tried moving that up rpm wise the next run to get more boost out of the hole but ended up spinning).
On that run (leaving at just under 4psi) it took 2 seconds of the 6 second run to get to full boost (13psi). Once the turbo gets moving obviously it is doing a pretty good job pushing me down the track, but I've got to figure out a way to get the turbo spooled up quicker.
I know a t-brake would probably help this, as well as a high end boost controller, but I am looking more to timing techniques and fueling. Possibly a little nitrous oxide just out of the hole?
My turbo is taking a long time to get up to speed. I left with just under 4psi on the 2 step set at 3200rpm (tried moving that up rpm wise the next run to get more boost out of the hole but ended up spinning).
On that run (leaving at just under 4psi) it took 2 seconds of the 6 second run to get to full boost (13psi). Once the turbo gets moving obviously it is doing a pretty good job pushing me down the track, but I've got to figure out a way to get the turbo spooled up quicker.
I know a t-brake would probably help this, as well as a high end boost controller, but I am looking more to timing techniques and fueling. Possibly a little nitrous oxide just out of the hole?
93 pump and spraying 80/20 meth over 10psi. with the 2 step 200 rpm higher (from ~3200 to ~3400) it moved me from just under 4 to just over over 5. Might be able to squeeze another 200 or so rpm out of it before it pushes through.
Im sure your running 93 and meth for a reason, however e85 hepls spool time quite a bit. If 200rpm and 1psi more made you spin out of the hole, nitrous is going to make your traction issuse worse. What tires are you running?
Just wondering if there were any tuning tweaks that can aid in spooling a large turbo up quicker in the powerband. Maybe retarding the timing a bit as it spools or putting more (or less) or less fuel in it. Sorry if it is a stupid question, just figured if there are techniques to help with spool you guys would know.
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There is a ton of different ways to get to the same result and everyone will do it different. Simply put move timing around and test, and do the same with fuel. Some like a ton of timing and a lean afr and some like a bit of fuel. Some like timing coming in and then dumping it once into the converter. Is that confusing enough lol?
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Here is his thread of the build
https://ls1tech.com/forums/forced-in...res-video.html
There is a ton of different ways to get to the same result and everyone will do it different. Simply put move timing around and test, and do the same with fuel. Some like a ton of timing and a lean afr and some like a bit of fuel. Some like timing coming in and then dumping it once into the converter. Is that confusing enough lol?
OP do you not have a electronic boost controller? That will be your best help in setting up a boost ramp that will get you out of the hole fast and still bring it in soft enough so you don't spin.
Do you have adjustable shocks?
Don't do it to him!!! He isn't ready!!! LOL
OP do you not have a electronic boost controller? That will be your best help in setting up a boost ramp that will get you out of the hole fast and still bring it in soft enough so you don't spin.
Do you have adjustable shocks?
OP do you not have a electronic boost controller? That will be your best help in setting up a boost ramp that will get you out of the hole fast and still bring it in soft enough so you don't spin.
Do you have adjustable shocks?
Apexi and some others make controllers that do gear specific boost control. Most do 1st-5th gears. These are pretty helpful in getting a big turbo moving faster in low gears without overboosting in higher gears.
Atleast throw a manual boost controller on, it will help with spool quit a bit. Most wastegates crack open at half of the target boost pressure. How much timing and what afr are you running on the spool up?
about 18* when i come out of the hole @ 3200rpm, tapers off to about 12.5 mid way through the spool then peaks at about 14.5* at full spool/rpm where it stays for the remainder of the run. afr is about 11.25:1 through the spool.
Well it's not uncommon for people with auto's to run 30-40 degrees of timing and a 12.5-13 afr at the line. Obviously need to ramp out timing before you launch. May want to raise the 2 step rpm also. You will have to play with it but it sounds like you're leaving a lot on the table. You want the engine to make the max amount of torque while coming up on the converter.
I would start at 18* around 2000rpm and ramp it up to 24* at 3200 where you are coming out of the hole.
Once it's out of the hole whatever the next rpm cell is up from the one it's on when it comes out the hole, take about 6* degrees out of it, and take 2 more for each cell until you reach 14.5.
Make sense?
That should be a good start and if it's not enough make the ramp from 18-28 and then back to 14.5.
What plugs are you running?
Once it's out of the hole whatever the next rpm cell is up from the one it's on when it comes out the hole, take about 6* degrees out of it, and take 2 more for each cell until you reach 14.5.
Make sense?
That should be a good start and if it's not enough make the ramp from 18-28 and then back to 14.5.
What plugs are you running?
