Hey...

am new here... but have a nice KR Verada ei!!! however recently i have notice i have a lack in low-end power... ie u put ur foot down from take-off n have little power til like 2500-3000rpm!!! What the....???
can any1 give me some insight into what this is, how i would go about fixing it, and can i do it myself....??

Cheers!!! :dancin:

Use PULP, it will shift the torque curve to arrive at its peak earlier. Then if you want to free up the torque drop in the high end fit a straight-through muffler.

what the.....????? :S none of that makes any scense to me!!! Sorry!!! i got a straight through muffler.... but yer.... :S

maybe thats cause sence is spelt S E N C E... not scense.. ulp = unleaded petrol, and guess what pulp means kids? thats right premium... so if you already got a stright through muffler just use premium instead and see if the more expenso go-juice helps it, if not fit a V8.

she needs premium dood, PREMIUMMMMMM!!!!!!!!!!!!!!!!!!!!!!!!!

she needs premium dood, PREMIUMMMMMM!!!!!!!!!!!!!!!!!!!!!!!!!

Hey Snake, when are you going to get out?

If you only use ultimate or one of the 98 octane premiums, then advance your ignition timing a few degrees too. It made a huge difference to my car.

[QUOTE=Nick]maybe thats cause sence is spelt S E N C E... not scense.. QUOTE]


Actually it's S E N S E.

i believe its sense, also straight through muffler and advancing timing with PULP will help top end, and they wanted more bottom end. its very hard to improve bottom end without stroking engine, getting a specific can grind is possible, changing to a lower final drive ratio will improve low end response as well, but both these options will lose top end revs and top end speed.

I had a very noticeable bottom end boost when I advanced the timing.

I'm reading that this loss of power is a recent thing, not a general that you guys are helping with. I can't provide too much assistance with this sort of thing though.

I'm reading that this loss of power is a recent thing, not a general that you guys are helping with. I can't provide too much assistance with this sort of thing though.
Bottom end torque loss is what happens when you make it breathe and fart easier. Like KillBilly
said, increase the timing a bit to bring back some of the bottom end and add a FPR.

When you make it breathe and exhaust easier, the lower end should not be decreasing. You create more top end power by stopping the huge drop in torque after it hits its point of max volumetric efficiency (peak torque). IMHO with a low tech engine such as the 6G72 it's always going to be hard to boost low end unless you go for a small turbo.

im assuming u r increasing timing with the PULP and getting gain with bottom end, bec the PULP has a different amount of time to burn.
what u r doing is making the spark fire a bit sooner than the fuel arrives. with standard fuel this only helps when everything is flowing fast, ie high revs, like u can advance timing for a long highway drive on cars that dont have overdrive and are revving high when cruising at 110-120, they are more willing to rev smoothly,then put it back once u r back to city driving bec they are sluggish in that condition if too advanced- (this is with satndard fuel).

as vlad points out better breathing in ultimate flow usually causes bottom end loss, bec there is less velocity and swirl of air and fuel through the intake valves and combustion chamber and out exhaust, plus poorer suspension of the mixture in the air, so the way of the future to have it both ways is systems like VTEC and VANOS to have variable cam lift and timing, and/or variable intake tract.

as vlad points out better breathing in ultimate flow usually causes bottom end loss, bec there is less velocity and swirl of air and fuel through the intake valves and combustion chamber and out exhaust, plus poorer suspension of the mixture in the air,

I thought this might be an issue on a carbied engine but an EFI? I'd have imagined that it's vapourised good enough to work well enough.

yeh maybe with the swirl and droplet suspension factors efi helps a lot, but still velocity through combustion chamber at low revs suffers when evrything is opened up for bigger flow at higher rpm. but evry engines diffrent, best if u can see dynos and tests of someone elses trial and error...