2nd Generation Specific (1986-1992) 1986-1992 Discussion including performance modifications and technical support sections.

mpg difference between fi and carbed 13b at 200 rwhp?

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Old Jun 8, 2006 | 10:49 AM
  #1  
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From: lillington, nc
mpg difference between fi and carbed 13b at 200 rwhp?

does anyone know? im shooting for 200 rwhp on my na and i like the fi system, but the carb setup would kick ***, it'd make the engine look tiny. that'd kick ***, plus i heard its good for almost 30 out of the box, more if you velocity stack.
i dont want a carbed vs. fi flame war, just info on mpg and if the numbers i posted are accurate
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Old Jun 8, 2006 | 11:11 AM
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From: Rohnert Park CA
Carb'd you will have lower daily mileage than with fuel injection.

Carbs are good for peak power, but poor for daily driving milage requirements.

Toss in when you get in the 200+HP range for power you tend to use the throttle more, and your mileage will probably further drop.
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Old Jun 9, 2006 | 02:39 AM
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From: Mississippi
I'll have to agree with icemuff, they're both gonna suck, if you're even able to push an NA 13b to 200rwhp (approximately 235 flywheel hp - better than the stock Renesis).

You can get to around 170rwhp and keep 25ish freeway mpg. How? 1. Intelligent street port. 2. RB header. 3. SAFC or Megasquirt fuel control. 4. Cone filter, cold air intake, and light intake manifold port job.

Getting beyond 170 requires a super loud exhaust, true standalone ECU or super bad drivability carb and / or wild port that you really wouldn't want to have to deal with in traffic.
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Old Jun 10, 2006 | 10:03 AM
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From: Bemidji Minnesota
Originally Posted by 88IntegraLS
I'll have to agree with icemuff, they're both gonna suck, if you're even able to push an NA 13b to 200rwhp (approximately 235 flywheel hp - better than the stock Renesis).

You can get to around 170rwhp and keep 25ish freeway mpg. How? 1. Intelligent street port. 2. RB header. 3. SAFC or Megasquirt fuel control. 4. Cone filter, cold air intake, and light intake manifold port job.

Getting beyond 170 requires a super loud exhaust, true standalone ECU or super bad drivability carb and / or wild port that you really wouldn't want to have to deal with in traffic.
Kahren's ports made 195 with a safc, RB exhaust, and TII manifolds? He told me it idles at 900RPM and acts like stock.

200 or more requires the EMS.
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Old Jun 10, 2006 | 11:25 PM
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Ever heard a vid of Kahren's car? Sure you want that sound eminating from your car's *** all over town?
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Old Jun 10, 2006 | 11:27 PM
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From: chamber of farts
Originally Posted by Icemark
Carb'd you will have lower daily mileage than with fuel injection.

Carbs are good for peak power, but poor for daily driving milage requirements.

Toss in when you get in the 200+HP range for power you tend to use the throttle more, and your mileage will probably further drop.
Pluse, you'll have to adjust it seasonally?
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Old Jun 10, 2006 | 11:52 PM
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From: Bemidji Minnesota
Originally Posted by 88IntegraLS
Ever heard a vid of Kahren's car? Sure you want that sound eminating from your car's *** all over town?
Which vid? I have around 8 of em. They don't seem to carry as well as alot of setups do (Corksport, Motoria).

When he made his new cat-back you can tell. Plus it really wasn't that loud (3 mufflers).
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