sr18 wrote:scene the removal of the rev limiter is not for speed its for burn out purpose...but i had a SR20 DET ecu and some men broke in my car and stole it.....i had a few mods on the car before
oh boy *sigh* why do you guys do this to me?
sr18 lets make this as objective as possible.
you need a higher rev limit to do burnouts
ok thats important.
But at the same time you say that you have
A SR18/20 DE
at the very best i can assume that you are using the 18 head on the 20 bottom end or the stock 18 head and block with SR20DET EMS. Questionable but fair enough.
by my calculations with any combination of modifications you may have made to the stock head(s) or block(s) you are using stock management and you will be limited to about 160WHP NO HIGHER normally aspirated and about 200 WHP under turbocharged boost.
mind you those figures are probably double what my experience tells me you're actually running but just for you sake leave it at that.
anyway here's what i wanted to put forward. The
ONLY SENSIBLE purpose of a burnout is so that the race compound used in racing slick tires can be brought to their optimum operating temperature before a race. That said it is also worth mentioning that race slicks work best on race tracks prepared with traction compounds like "track bite" or they loose their effective capacity to put the power to the ground when launching the car aggressively.
so basically what should govern your immediate decision to remove your stock speed or rev limiter settings would be:
1) are you going to be running on full race slick or drag radials?(less than 100 threadwear tires)
2) will the track you intend to run the car on be prepared with trackbite?
if the answer to either or both of these questions is NO then i guess it follows sensible thinking that you should leave the limiters alone.
now just because i have nothing better to do i'll go on to say that AS LONG AS you are running the engine (especially without boost) within the confines of the stock fuel system and you have done nothing to significantly improve the volumetric efficiency of the engine,
(meaning improved flow over through the head like bigger cams etc)
THERE IS NO POINT to increasing the rev limit of the engine for any reason than just being able to brag about the higher rev limit or enjoying the way it sounds. the payback for doing it will usually come by way of greatly reduced engine reliability because the stress on the rods and bearings are increased tenfold. EVEN IF the stock cams could make more power at higher RPM they have the stock exhaust headers restricting as well as the intake port design. Unless reflashed the stock ecu will usually not be up to the task of providing optimum air fuel ratios beyond stock rev limits which puts you in the range of immediate detonation. The lubrication system may fail if not designed to properly lubricate crank and pistons at these extreme RPM's. this will in turn cause the engine to overheat causing at the very least an annoying experience of a blown radiator hose or cap. If the engine had seals on the verge of failure this is a sure way to expedite their demise as well possibly taking the Oxygen sensor along with them if enough oil gets into the combustion chamber before complete engine failure. of course anything that screws up the oxygen sensor will probably affect close loop (less than full open throttle) fuel economy. multiply the catastrophe by 10 if you're running boost.
at the end of it all if you're running a race for pink slips and it doesnt matter if you blow it up in trying to win cause you'll lose the entire car anyway if you lose then why the heck not? pour in some Aviation fuel, advance the timing all that the distributor could go. drain out half the oil from the engine (2/3 if you're feeling lucky) bolt on some 14 inch steelies in front with semi slick compound racing tires and launch the car at 14 000 RPM. you may not win but hey... at least if i was there watching i'd be impressed.
, bro also it doh make any sense risking that, jus get an ECU without a speed cut and a rev limiter..
