.

 

You need to multiply the tq by the gear ratio and the final drive ratio. With a B-16 trans the appox. tq in 1st gear for the B-16 is 1554 ft.lb. for the B-18b its 1764 ft.lb. in 3rd gear it is approx. 732 ft.lb. vs 831 for the B-18.

 

look at the 0-60's, that is where u can tell torque!

 

I was wondering the same thing, when I tuned my car I not only gained torque ACROSS the board, but 15lbs at the peak point.... and also tuned in alot more low-mid end torque.... but I have yet to goto the track and see if it can knock a few tenths off my 1/4 (also got 25whp more tuning).

 

The B18A also makes the torque lower in the powerband. Like 5000 ish compare to 7000 ish on the B16A. That's why you notice it better. You don't have to rev the hell out of the B18/20's to get some speed.

 

The tq and bhp of on engine are rated at the flywheel, what actually gets to the wheel,to accelerate the car,is multiplied by the trans mission gear ratio and the final drive ratio.
a first gear ratio of 3.2 times a final drive of 4.4 multiplies the engine tq & bhp by 14.08 (less friction loss) a third gear of 1.5 x 4.4 final drive muliplies it by 6.6 That is why your car accelerates quicker in 1st gear than 3rd. It is why changing to a 4.9 final drive will have your car accelerate faster with no engine mods.

 

It makes a big difference...ask people with H22a's, but that's more like 20-30 ft-lbs

 

You can't compare just peak numbers. Look at a stock B16A graph vs a stock B18C1 graph. The peak may be small, but the B18C1 whips the B16A's *** everywhere.

I got tired of revving the **** out of my B16A just to beat some soccer mom SUV onto the freeway.

Sonny

 

130 ft-lbs of torque makes a TON of difference over say 111 ft-lbs

 

Ask your girlfriend if she'd rather have a guy with a 12" dick or a 7" dick.

There's not much difference on papaer, but you sure can feel it!

 

lol

 

HAHHAHHAHHA

GOOD ONE!!!!!!!!!

Thanks for the laugh!

 

i've never read a more inappropriate, yet insightful answer. ROFLMAO! good call d00d.

 

it also has to do with what part of the power band the engine is making more power at.

for example: i have a 89 golf, it has 110tq. at the flywheel from 3300rpm-5krpm. where as the si makes it at 7600rpm. which allows me to take si's from a 10mph start for sure, but once the si get's into its power band and stays there(which is like from 3rd gear) it just pulls pass me and never looks back mostly do to my suckass gearing though.

but what a lot of people forget is that the si makes most of its power up top; therefore, you shouldn't expect it to pass car's with ease without taking it to redline.


[Modified by star&buc, 10:59 PM 10/20/2002]


[Modified by star&buc, 11:00 PM 10/20/2002]

 

Ask yourself the question, what is torque?

http://www.howstuffworks.com/fpte3.htm

 

Im starting to understand this torque and gear combination. I saw a site a while back that could comput somethings...possably to find the best gear ratio....which would be great to know if I was in the market for a new tranny...any body know?

damn Im learning...just think if all this time deicated to reading the honda-tech forum was spent to college...I'd probly be graduated with 3 masters...and then make enough money to pay for a garage to put a b18c5 turbo'ed in the CRX instead of this tiny b16



[Modified by FitCRX, 6:27 AM 10/22/2002]

 

that's also another reason why honda's have such high final drive's. seeing how tq get's you moving and honda's don't have much of that down low so they make their trannies with high final drives to help with the acceleration or something like that.

 

The ultimate question. With our small displacement motors, it's pretty difficult. I've seen that all the mods you do to increase HP, also increases the torque - I'm not sure of a way to only build upon the torque....

It would make sense that having a smaller wheel/tire diameter would increase torque. Lightening your car would 'feel' similar to increasing torque.... I'm out of idea's tho.

EDIT: Advancing ignition timing makes a difference, and also a higher compression ratio builds up those torque numbers... As well as HP.


[Modified by MrTodd, 11:58 PM 10/21/2002]

 

hp = tq * rpm / 5252, so you can't increase *just* torque according to the formulas... seriously, do things to increase horsepower and torque will follow. Just be sure you're doing things to increase torque in the range you desire - peak power output doesn't affect low rpm output, etc.

 

If you start with a GSR which makes 110 at 6200 and 98 at 8K at the wheels from 128 at the flywheel @ 6200 which is acura's published spec... 10 more ft/lbs at 7800 (hp peak) would be an extreme difference.

110*7800=858000/5252=163.36theoretical whp from the GSR's stock 138-144whp peak. thats a completely different car, its the one I drive 10 ft/lbs of tq is nothing to sneeze at especially at the right interval...

 

ha!...

 

You have to remember, its not just what torque peaks at, you got to look at all rpm's. B16a makes 160hp, but you have to rev the hell out of it to go fast. B18b makes about 140hp[guess] but will beat a b16 in an identical chassy.

 

huh? thats not right. All the mods you do to your car increase torque, because adding headers doesn't change your redline.

 

I don't really understand what your trying to say..but taking a guess at it...headers don't change your redline...but they do change your HP..HP is a function of tq...so change the equation

tq = (hp*5252)/RPM




[Modified by FitCRX, 4:33 AM 10/23/2002]

 

use percentages so you dont have to do all the gear/math calculations.

B18a w/ 126 ft-lb of torque has 15lb-fot more than a b16a, 15/111 = ~13-14% (somewhere around there) more torque. If that % is kept thru most of the power range, it can make a difference.