Thanks Bahamut

And welcome back.

WADAD

 

your question - do torque/hp points change with mods.
answer - absolutly. camshaft will be a nice upgrade for you, and exhaust system as well as dropping a bit of weight like you said (seats, tire, fuel) would likely get you into the 15's. camshafts can generally add 10-12hp to the wheels and then exhaust adds another 5% hp onto that.

 

Yes, most mods will change the powerband of your car. Camshaft and header will produce bigger gain than any exhaust.

15's?? He has to be fast enough to beat/compete the last gen SI HB, stock. Thus, 160-180 HP goal range.

 

160-180Hp Ouch!!!!
I assume you are talking flywheel Hp but no combo of bolt on mods will produce that amount hp right? That's 40 extra hp Im looking for. (Along with camshaft)

I'm going to have my car dyno'd next week with the headers. Will post when I return. Hopefully it will be encouraging.

WADAD

 

Yes, at flywheel.

No regular bolt-on mods will grant you +40 HP. You may get half or jump 2/3 of it.

Camshaft will give you, depending on mods, big increases. I'm confident w/ bolt-ons and cam, you'll chase down a stock SI or even w/ intake.

 

Ok now that I have th new dyno figures can someone answer my question about shift points. Should now run to 6000 redline before shifting since hp is still peaking up to this point or should I shift where hp and torque intersect around 5700-5800 rpm. At this point hp is still rising but torque is declining?

I am am curious to know how I would use this data to improve my times.

Thanks
WADAD

 

It's awfully hard to tell since your motor's HP tends to shoot straight up to redline before dropping off. We know shifting redline isn't a way to go, higher chance of driver error.

If it drops off before redline, I would say shift there and then.

Shifting at TQ intersection, it's not a sure rule. As HP increases in a powerband, TQ will have to spiral downwards. I don't know any motor defying this laws of physics.

Try this. As you merge onto the interstate, hit WOT. Feel your motor pull and sense the faint hint of HP drop off. Try this a few times to get an accurate reading.

Downshifting will have a different feel than stop light sprints.

 

On the way back to Orlando I tried pulling 3rd WOT a couple times and the car pulls all the way to 6K. There isn't really a noticeable drop in the "pull" of the engine.

Next time I I go to the track I am going to try shifting further into the rpm range and see how that affects my times. A buddy of mine also told me that my shifting techniques are bad. Anyone else can chime in on this but he said once I get hooked up and move off from the light that I should never release the accelerator pedal. In other words my foot is to the floor the whole time.

His reasoning is that the car is rocking back and forward from the way I shift and this is slowing down my times? Anyone agree or disagree with this?

The only thing I am worried about is missing a shift and what catastrophic results may occur.

This is my last on this until I break that 16 sec barrier I am looking for.

Peace
WADAD

 

Leave your foot floored on the gas while you shift and Mystic Seer Andrew predicts a new clutch in the near future.

 

hehehe funny. Sounded crazy to me too.

WADAD

 

That's true. That's an old domestic trick to hammer the car faster. Then again, domestic clutches are probably cheaper to destroy anyway.

If you don't feel any drop, try to tag 6100 at most. I'm too hestiate to ask you to peg 6200. Feel your engine. Don't go berserk and go for 6500 rpm and spin a rod bearing.


"His reasoning is that the car is rocking back and forward from the way I shift and this is slowing down my times? Anyone agree or disagree with this?"

All manual will have this tendency. Only the true god-like shifter can shift w/o every having the car rock a bit. From all the years of driving, I have only seen 2 out of hundreds can do it on the track or street.

Get traction first within the first 60' . . . the rest will drop in time.

In the pro drag import circuit, they consider 1.8 sec on the 60' bad traction . . .

 

Fuel cutoff is around 6,250-6,300 (at least in first gear) so watch how far you rev. A slight driver's error could really ****** your time.

 

OK cool guys.

I need that new rubber first I guess but my tires aren't really worn yet. We'll see how things go. My goal is to break the 16 sec mark without spending over 2G's. So far I have spent a total of $830 including the dyno and short shifter I just installed.

Peace
WADAD

 

Yah.. It can be done and it's called power shifting. You really have to shift really quick inorder to do this technique correctly.

If your car does rock back and forward on every shift you make, then my humble suggestion for you is to practice your shifting skillz. Shift faster and release the clutch in a split second. You shouldn't feel the car jerk forward on every gear you put into and it should feel a smooth transition, almost like an auto shift if you get this shifting correctly. Also, just a little tap on the clutch should do to get the car in gear. Keep practicing.

 

Power shifting is usually used by domestic who is willing to torch his clutch. Prolong usage will torch your clutch.

Yes. Practice will take time, but eventually you will grind a gear from misshift.