Is this really possible at all? What kind of mods can you do that won't effect much the fuel economy but will give you more power? I'm already planning on killing lots of weight and all that. This is prolly a silly question but it is hard to find these types of things considering most are more in love with their straight-backs than their air. ;-)

Thanks.

 

well any real power increase is gonan require more fuel.

 

Basically increasing power requires additional fuel when the cylinder design is a constant. If you wanted to increase fuel economy, you could tune your engine perfectly to the lean limit before it harms your engine. But this is not really a realistic approach. So typically, power/economy issues is a push/pull. Give up one to get the other. This is concerned with the actuall fuel mixture requirement. Other losses that are independant of the fuel mixture are blow by and scavaging. These are more dependant on intake/exhuast timing. Try looking into these issues.

 

One thing I'm wondering is about opening up the exhaust hurting gas mileage. I've heard lots of conflicting things about this, and from a technical standpoint I really dunno what judgement to make about it.

 

Not sure if this is outside the category of "mods" you were asking about, but what about swapping the engine?

A motor meant for pushing a 2700 lb car should get good mileage when its put into a 2000 lb car. I get ~30mpg in my 11:1 compression b18c1 w/ all the boltons, even when crusing at 5k rpms on the freeway. It's all in how you drive.

 

I'm prolly gonna be running a stock hf that gets 50/56 MPG or a d15b vtec which I figure would get 40/45.

 

take weight off of the car.. i bet you can lose 150lbs if you put your mind to it

 

I've been thinking about doing lexan in the rear windows, I hear it saves 50 pounds.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by SVOboy &raquo;</TD></TR><TR><TD CLASS="quote">I've been thinking about doing lexan in the rear windows, I hear it saves 50 pounds.</TD></TR></TABLE>

the hatch should save you a good amount of weight.. but the side windows will blow away in the wind if your not careful.

there is a lot of weigh tin the bumpers.. battery could go lighter and lets not forget about lighter rims

 

I'm looking at the 15" rota slipstreams too, light crap they are.

 

Sure you could lose weight, try devices like ignition amplifiers, tornado (dunno if it really works...who knows), keep it maintained and tuned. Use of high quality thinner oils will cut down the powertrain losses. We're not talking about a lot of power here but everybit counts.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Reelizmpro &raquo;</TD></TR><TR><TD CLASS="quote">Sure you could lose weight, try devices like ignition amplifiers, tornado (dunno if it really works...who knows), keep it maintained and tuned. Use of high quality thinner oils will cut down the powertrain losses. We're not talking about a lot of power here but everybit counts. </TD></TR></TABLE>

Could you give an explanation of ignition amplifiers for me? I've never heard of such a thing, but then again, I am rather new.

 

You could always cut weight, thats one way to increase fuel economy by reducing the load on the engine and at the same time make the car faster.

 

i have heard alot about people doing B series swaps and getting better fuel milage because of the newer electronics, and the fact they dont have to push the motor so hard to get it up to speed. anyone know wut im talking about?

 

Suck ,squeeze, bang, blow.
Want more bang? You'll need more fuel.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Reelizmpro &raquo;</TD></TR><TR><TD CLASS="quote">Sure you could lose weight, try devices like ignition amplifiers, tornado (dunno if it really works...who knows), keep it maintained and tuned. Use of high quality thinner oils will cut down the powertrain losses. We're not talking about a lot of power here but everybit counts. </TD></TR></TABLE>

Did he just recommend a Tornado intake insert?

I've got this bridge I need to sell...

 

I've heard the tornado insert does weird things to the car. So I dunno really. What about a hybrid tranny. I searched for them and found nothing about making one or the theory. I know it is replacing gears, but should I read up on the honda trannies and then go about it or what?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by SETI20 &raquo;</TD></TR><TR><TD CLASS="quote">Suck ,squeeze, bang, blow.
Want more bang? You'll need more fuel.</TD></TR></TABLE>

Don't forget the suck and blow...
increase the flow, less pumping loss... yo.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Bunger &raquo;</TD></TR><TR><TD CLASS="quote">increase the flow, less pumping loss... yo. </TD></TR></TABLE>

I have heard that increasing the flow will hurt the gas mileage though, is this incorrect? To me it makes sense, but what makes sense in my mind is usually off-base. Thanks.

 

If you can decrease pumping loss without decreasing port velocity, then you will gain power and efficiency.

 

Thanks, that's good to know.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by SVOboy &raquo;</TD></TR><TR><TD CLASS="quote">

I have heard that increasing the flow will hurt the gas mileage though, is this incorrect? To me it makes sense, but what makes sense in my mind is usually off-base. Thanks.</TD></TR></TABLE>

http://home.cinci.rr.com/mistab0ne/tranny.html

 

So if I start with a si tranny what gear would you reccomend I swap in for the 5th considering I want the lowest cruising rpms possible?

 

Well the theory is if you have a hotter/bigger spark you can acheive a better burn which means more power and better economy. Ignition amplifiers like MSD (multiple spark discharge), Jacobs, etc etc are supposed to give you higher voltage spark at all times. About the Tornado, I don't know if they really work or not but I like the theory because it creates a better mix of air/fuel = better atomization which is good for performance and economy.

Forgot to mention that keeping the air filter clean/changed will help economy and power too.


Modified by Reelizmpro at 3:41 AM 7/23/2005

 

its all about the weight reduction fellows