Hi, I need some education here, please help...

WOT = Wide Open Throttle = Pedal to the floor... correct?

I am moving along and suddenly I send my D15b7 to WOT. The engine RPM only increases by a little but then the engine gets loulder to reflect the rest of the WOT. It stays like that for lets say.. 1 - 2 seconds and then the engine finally speeds up working it's way to the redline.

What is the pause from?

 

the accelerator pump is bad in the carb...

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by B20luda &raquo;</TD></TR><TR><TD CLASS="quote">the accelerator pump is bad in the carb...</TD></TR></TABLE>
?? The accelerator pump.. wtf?

 

maybe u were outside ur powerband cos sometimes if ur in a high gear goin slo and floor it doesnt mean ur car is gona hop n go it will build up into the powerband ... duno whether this will apply to ur situation ... like for my car i get into my powerband from 4500 to 6500 anything lower its like a snail ... trying shifting to a lower gear then nailing i think u may see the difference

 

Right. Because fuel injected engines use carbs.

It's a combination of high gearing, a **** for power engine, and maybe an automatic tranny.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by IN VTEC &raquo;</TD></TR><TR><TD CLASS="quote">Right. Because fuel injected engines use carbs.

It's a combination of high gearing, a **** for power engine, and maybe an automatic tranny.</TD></TR></TABLE>

Carbs? What are carbs?


" a **** for power engine" doesn't say anything but your opinion of the engine, which isn't something I asked about.

"maybe an automatic tranny" MAYBE?

No offense but I hate people who attack my damn engine. I know it's not powerful, get off of it already. If you really feel the need to mention that in every post when I ask something about it then write a letter to honda asking wtf they'd make something like it in the first place.

 

d15b7 --&gt; narrow powerband and tall gearing or not being in the 'right' gear which is part of the reason y there is a 'delay' in ur car's response time

carbs ---&gt; carberators ( i think i spelt that wrong )

i dont think he was refering to ur car (**** for power engine) just making a general statement but i am sure he will defend himself lol

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by z3r0 &raquo;</TD></TR><TR><TD CLASS="quote">d15b7 --&gt; narrow powerband which part of the reason y there is a 'delay' in ur car's response time

carbs ---&gt; carberators ( i think i spelt that wrong )

i dont think he was refering to ur car just making a general statement but i am sure he will defend himself lol </TD></TR></TABLE>
Well I know he wasn't referring to my car, he was referring to the engine specificly.

Wasn't aware our cars had carberators ...

Also, my theory is like this. I think this will give you more of an idea of what I am seeing. I think the delay is the ECU catcing up with the dramatic change in throttle change, the engine gets loulder because much more air is in the combustion chambers but not more fuel. Then the ECU increases the fuel and the engine actually starts to speed up. As soon as the engine starts speeding up, the power is at the wheels.

I am not saying the engine's rpms are continuing to increase during the "pause". It's like they remain at where they were but get louder because more air is being moved in and out of the cylinders. Nah mean?

1. PEDAL TO FLOOR
2. LOW TONE GURRRRRRRRRRRR for 1 to 2 seconds
3. SUDDEN HIGH INCREASE IN RPM TO RMMMMMMMMMMMMMMMMMMM and POWER TO WHEELS.


Thats just my theory. But the other theory of the tall gearing may be right because I experiance that when getting off the freeway at times. Hard to say, I just wanted to understand why it was doing that - for sure.

 

i was kidding about the carbs...just being a smartass....

 

yeah and now I get it that IN VTEC was anti-proofing the joke back.

 

sounds funny .... pseudo turbo lag lol maybe u should get ur car looked at .,....

 

First, drive in another dx and see if it's the same, then try advancing timing a bit if it's not.

 

Sounds normal to me, especially from low RPM's.

The increase in noise is due to the fact that your TB just popped wide open and is now sucking in probly several times the volume of air.

The reason for the low tone is simply because the RPM's arn't rising and that's because there's a fair bit of engine, car, tranny and wheels to accelerate. D's don't have much torque nor are their flywheels terribly light making it hard for the enigne to accelerate itself ESPECIALLY at lower RPMs out of the powerband.

It all really comes down to intertia and the fact that it's all stacked against your 100hp. This is why lighter is better, especially rotational weight (wheels, tires, tranny flywheel, internals, etc.)

go find yourself a geo metro and try the same thing and you'll feel really good about your car

 

Assuming it's an auto tranny, it's just taking it's time downshifting.

Suddenly go to WOT... First thing to happen is a little increase in rpm just from the torque converter. Then the transmission downshifts, which is the bigger jump in rpm.

Is that car old enough to have a physical cable from the throttle body down to the tranny? If that's not adjusted properly, the tranny could be downshifting late.

Or perhaps the tranny is just designed to do that because of fuel economy... Not to attack your engine & tranny, but they're probably just designed to be slow & economical.

 

Yes it does have a cable going from the throttle body down to the transmission. Thanks for replying too. I think the last few people to reply here have really been helpful in figuring out whats going on. Thanks again!