20b question
 

i was thinking if i got the 20b in a 86 fc na how much would it throw off the weight of the car?????

Not much. According to Peter Farrell, the 20B weighs only 100 lb. more than the 13B. In my car, the weight distribution is 51% front and 49% rear.

http://www.cris.com/~Asam/Part3.html

:rofl:

i read the story and heard you say you only got 12 mi to the gal is it possable to get anything better?

You're going to throw $10K dollars into this swap, who the hell cares about fuel milage.

Higher gearing and good tuning should get you much better mileage than 12MPG on the freeway. The 20b doesn't need that low of a ratio to accelerate quickly anyways.

fuel
 

At 60mph highway i am at 25 to 26mpg, with street port.

After adding a wide-band O2 sensor, which provides feedback directly to the TecII, I'm getting 15.5 mpg on my daily commute. I haven't taken it on a long drive, yet, so I can't give a current highway mileage figure. Without the wide-band, I got 16.5 mpg on a trip to Florida, as well as on a trip to Canada. I'm hoping that I could get 18 - 19 mpg now.

The answer posted by slo is good advice. I have a T-II differential (4.10 : 1), and I could easily get by with a 3.7 : 1 ratio or even a 3.3.

What rearend ratio are you using?

Stock with 5 speed. At 14.7 to 15.0 A/R

Good luck finding taller diff ratios for a TII rearend.

mine got 19.9 on the highway, 14-16 in mixed driving. if you drive it hard though, single digit mileage would be really easy

Not a 20B. but for refrence my tired 13b-re swapped FC gets 22-23 with the haltech set for closed loop 14.8-1 at 80 MPH.

i've read that racing beat can make any ratio you want, i have no clue what it would cost though.

[QUOTE=Attila the Fun]After adding a wide-band O2 sensor, which provides feedback directly to the TecII, I'm getting 15.5 mpg on my daily commute. I haven't taken it on a long drive, yet, so I can't give a current highway mileage figure. Without the wide-band, I got 16.5 mpg on a trip to Florida, as well as on a trip to Canada. I'm hoping that I could get 18 - 19 mpg now.
QUOTE]

The tec 2 does not have sequential fuel injection does it?

if racing beat makes it, you'll have to sell the car and refinance your house to afford it.

That's astounding. Nice job of tuning.

[QUOTE=CMonakar]I actually have two TecIIs. The second one handles the trailing plugs and injectors. At some point, I plan to upgrade to a single Tec3, which has built-in support for a 20B.

It's more like i am at 60mph, but also tuning is with Steve K.