@ fatman,
my ep82 is hitting boost around 4500K and around 5k for the full boost.
Yes Im noticing wheel spin in 1st gear until red line and a bit in 2nd gear.
Tried bouncing the limiter 3x before engaging to 2nd and got a much more positive result without the case of bogging down. This is just
okay though if im using my street tires. But never tried it on slicks.
As for my Launching (@ staging lane) is it really normal for our 1300cc w/ tdo4 to bog down below 5000K rpm?
Because, I want to use my slicks but I have to hit 6000K rpm at launching just to keep it from bogging down and hitting the rev limit comes
very quick.
Is it normal for tdo4 equip. 4efte to launch at these RPM?
Somebody also suggested that I should use a bee R rev limiter or an MSD w/ launch controller so that when I engage the Launch controller
my turbo will be starting to boost and I can Launch @ 4000K RPM and dont bog down?
Im really sorry for my ignorance.
No need to apologise, you're asking questions in the right place in the right manner, I'm always happy to help out somebody who is willing to learn rather than just be spoon fed.
I'm glad to hear my suggestion worked, that definitely shows it's just the management of wheelspin that needs addressing, not some sort of crazy gear ratio problem!
To answer your spool question, no, 4500-5000 is extraordinarily high for what I assume is a standard TD04L? Not some sort of crazy hybrid or a TD05? What sort of boost are you running?
Launch RPM is a complex subject, subject to many variables. Aside from engine displacement/turbo size some other key things to consider are flywheel weight, available grip, severity of the clutch engagement, whether you're using launch control and probably many more things I can't think of off the top of my head.
A lighter flywheel provides less energy storage @ any given RPM. The energy stored in the flywheel is what gets you moving before your engine has a chance to see the now open throttle and wind up some boost. Though many people 'upgrade' to a lighter flywheel, this can actually be very counter productive in a drag racing scenario where managing power off the line is quite literally the difference between miserable failure (bog/stall) and great success (ideal 60', best possible ET). My point is, your RPM launch point (effectively how much energy you're able to instantly load the tires with) will vary with flywheel weight. Even small differences in weight (e.g the spread across even the stock standard unit, they do vary) may affect ideal launch RPM by a substantial amount. You can't really compare between cars, especially given very varied traction conditions.
Far and away the best way for you to launch a car at the strip in a consistent fashion is with launch control. This can be built into an aftermarket ECU or come as a stand alone unit (such as the MSD). These devices usually do three things, 1 retard spark timing. This in effect expels the still expanding gasses from the exhaust ports prematurely, the expansion in the exhaust can make a bit difference to turbo spool. 2 add fuel. Similar to timing, adding lots of extra fuel promotes a rich mix literally burning as it's going out the exhaust ports. Further expanding gasses to spool turbo. 3 add configurable rev limit via spark cut. You set the unit to 4500 rpm, it will retard spark, add fuel and once you reach 4500 will cut spark on overrun, allowing you to sit at exactly the right rpm.
Launch control is definitely something to look into if you want to win races!
However, I would avoid the Bee R. They are very simple devices that have some very odd effects on spark timing. I've seen several engines damaged by their use. I haven't got any experience with the MSD, however their gear is usually good.
With launch control you could potentially LOWER your launch RPM, although you still need the energy in your flywheel, your turbo is already spooled and throttle is already wide open. Electronics react much quicker and power will be produced near instantly. Finding this sweet spot is just a matter of trial and error (and preferably some proper drag strip timing gear)
