Racing 90FB vs 93FB (Me)

[RatedR]

Man I'm PISSED~! Last weekend, I went out to race this 90 FB with my 93 FB. We're both completely stock (or so he says) but I kept loosing~! I can't explain it...am I supposed to loose??? I would take the lead off the launch, but as soon as I hit 2nd, he starts to pull and doesnt stop. I raced him about 5 times, the first 4 with my girl and my friend in the car, the last with just me. He had one friend in the car the whole time, but he still beat me even after I lost all that weight. The only thing I could think of was that he shifts WAY earlier than I do, cause when I get to 2nd, he's already in the mid 4000 of his 2nd. I would also wait all the way to redline before shifting. Does anyone know why I lost???

(Ahhhh, feel better now that I've vented out a bit)

-R

[240nismo]

maybe your clutch is shot and its slipping? if thats not possible put some injector cleaner in, then tell us what its doin

[RatedR]

Nah, not a clutch problem, I installed a Spec Stage1 clutch in it. Feels really good, pulls really hard all the way to 6000, but I kinda noticed that I lag from 6000-7000....I also noticed that my OBX shifter doesnt let me shift from 1st to 2nd above 6000, so when I would shift from 1st to 2nd at redline, I would have a small interval where I HAVE TO wait for the rpms to drop to 6000 before I can put it into 2nd....Anything else I missed???

[Aries]

um, for 1 you're reving the motor way to high.You don't shift at redline when the motor stops making power by 6200.You should be shifting between 6k and 6200 to get the best results.

[RatedR]

I knew it`! I started to notice the lag/struggle of the engine to soar up to 7000...Thanks Aries~! Should I only push it up to 6200 rpm in every gear??? Or is it only in 1st? Thanks again~!

[Aries]

well, in all the gears.the motor only makes the power that is allowed for by the flow of air (in and out) and the profile of the cams. Stock cams only make power until then.

[RatedR]

Thanks Aries~! Useful advice, wish I had known it before the race...hahahah

[Aries]

now go try again and beat him this time

[RatedR]

WEEKEND'S HERE~! I'll go do just that, WIN~!

[NeedCAforS13]

Aries...I was reading in motortrend, an article by one of their testers...he says shift right past the power peak (so say 6500) for the best results, because it puts the engine back into the powerband sooner on the following gear...according to his logic, if you shift just past the power peak it is actually better than shifting just at it! But either way shifting at redline isn't the way to do it (assuming your max power isn't at redline):D

Sean

[RatedR]

You both make sense, I just didnt realize that the KA24DE doesn't have "sprinting" capabilities when it comes to RPMs like Hondas do. Either way, I know I should shift at around 6000 cause then I would have to wait for the engine to drop down its RPMs until I can engage 2nd gear...this is also probably the reason why I cant power shift, been over-revving the whole time~!

[Ajax]

There was an article in sport compact car a while ago talking about finding your shift points. They had a dyno so they can go into more depth... but the point is you need to find out the torque to the wheels in each gear and the rpm drop.So, if you shift at red line- measure that torque and the torque in the next gear.Then compare with shifting at 6000 rpm and so on until you find optimum.I tend to shift just shy of red line with clutch, flywheel, injen, and 2.5" exhaust- no dyno but it feels like the best pull to me.

[RatedR]

DAMN IT~! I lost again~! But this time, I lost cause of excessive wheel spin out the line. I know I could've taken him if my tires gripped in 1st, but yeah I guess I need more practice with this car.... hahahah

[quiksilvia]

i have a 90 240 and i lost pretty noticably to a 93 hatch. maybe ur car needs a tune up, mine runs like crap...but the sr is on the way so i dont care...as long as i can beat a si with a quadruple decker wing, im ok for now

[C-Kwik]

Aries...I was reading in motortrend, an article by one of their testers...he says shift right past the power peak (so say 6500) for the best results, because it puts the engine back into the powerband sooner on the following gear...according to his logic, if you shift just past the power peak it is actually better than shifting just at it! But either way shifting at redline isn't the way to do it (assuming your max power isn't at redline):D

Sean

This is wrong. Not all engines and gearing are optimized with each other. Without a dyno and without knowing your gear ratios, it's hard to tell what the best shift point is. Choosing your shift points comes down to whether or not shifting will put more torque down to the wheels. This can actually be different for each gear.

[RatedR]

Hey QuikSilvia, where in NorCal u from??? I dont think I need a tune up, but that 90 does beat a lot of cars out there...he even took a 2000 Sentra, not sure if it was the V-Spec. Maybe he ISNT stock, but he sure looks like it, no BOV or Wastegate sounds or anything. And its not like I lost REALLY badly, I just loose by about a half a car length...

[singlecamhonduhkilla]

A HELPFUL HINT WHEN UR RACE AGAIN... LOWER UR AIR PRESSURE ON UR BACK WHEELS TO ABOUT 25PSI.. THATLL HELP U LAUNCH ALOT BETTER AND WHEN U LAUNCH LAUNCH AT LIKE A LOWER RPM.. I LAUNCH AT LIKE 2300 AND I GRIP VERY WELL.. JUST TRY IT ON UR OWN FIRST TO GET THE FEEL FOR IT.. IT WORKS..JOE

[singlecamhonduhkilla]

HEHE.. I HAD A LARGE JUMP ON A SIR-II HATCH ONE TIME.. BY LIKE 2CARS.. WHILE HE WAS SPINNING HIS FRONT TIRES.. BUT OF COURSE HE CAUGHT UP VERY FAST AND KILLED ME.. SIR-II HATCH(200HP) KA COUPE (140HP) BUT IT WAS KOO..JOE

[RatedR]

Yeh, I know how the launch feels, just that I got overly excited that one time (you know hot it is). I usually launch at around 2500, "feather" or follow through with the clutch all the way till I feel less wheel spin. After that, it's all GOOD~!

[quiksilvia]

im in sacramento

[RatedR]

quiksilvia - I'd love to see your car man~! We should meet up whenever you have the time~! I'm in the East Bay, Pittsburg area...

[singlecamhonduhkilla]

Wait a minute, how much horsepower does that FRONT WHEEL DRIVE thing have? What do you need a wing for then?

hahahaha!!!!

i love that!!loljoe

[RatedR]

Yo guys, I have an update on that 90 FB. I'm pretty sure he's not stock, but you guys figure it out. Here's what I was observing:

He raced a Type-S RSX. They went off the line both in equal distance. Shifts second, still equal. Shifts 3rd, then the RSX pulls away. But when they finished, the 240 was only about a fender or a door behind the RSX.

Now I've raced an RSX-S before, and MAN, did he ever smoke me in 2ND~!!!! And dont get the wrong idea, I'm not hating on him or anything. I'm just really trying to figure out how he's beating everyone, including me (repetitively~!), if he is "so called stock" in his 240. Any thoughts people?

[silviaNE]

Will he let you look under the hood? Look under his car for nitrous lines? When hes asleep at night break into his car and find out what really in his car. Just kidding on the last one.

[RatedR]

Dont think he'll let me pop the hood....any other thoughts?

[TomsMR2]

^ beat him senseless with a tire iron for not popping the hood :P

that kinda crap is retarded.

[Good240]

If you want to watch him fuel up you might catch him putting some rich fuel in his car. Doesn't mean his car needs it still but he may have a few unsightable mods such as a raised compression ratio, Overbore/stroke, aftermarket camshaft, or maybe even a differential that contains smaller gears.

Oh yeah about that powerband thing. Shift beyond the power band by at least a few hundred RPM, I'd say at least 500-600 RPM. If you drop say 2000 RPM between gears and you're powerband peaks about 5500 RPMS than you should start the powerband at 4500 and exit about 6500 through each gear. Of course ratios change gear to gear but this'll put you in the ballpark.