cb performance

jrg_mm · Post by **jrg_mm** » Sat Jul 14, 2001 2:04 pm

so is CB performace EFI good or not....

want to go turbo later but need carbs what do you all recomend..? I have a 1955 cc engine (76x90.5)

Steve Arndt · Post by **Steve Arndt** » Tue Jul 31, 2001 12:52 pm

Go for it, there isn't really a better off the shelf solution.
Steve

John BUG2180 · Post by **John BUG2180** » Tue Jul 31, 2001 2:45 pm

I've seen people use CB's throtle bodies and
SDS electronics, with great results! The next best thing to a complete off the self set-up.

Hot Wheels · Post by **Hot Wheels** » Tue Jul 31, 2001 11:12 pm

Same Here,

We ran them on two buggies here. Easier to tune than carbs, no more jet changes, no more float problems in the bumps. I have certainaly been pleased with the reliability and ease of setup. Like most products i think the "Best" setup depends on your intended use and ability to use the added features. Being my first venture in aftermarket FI i like the CB setup as an entry level system thats easy to comprehend.

Sean

dimaggio · Post by **dimaggio** » Sat Aug 18, 2001 3:48 pm

Now, the question really is: is it worth the $1800 mackaroos instead of $700-900 for a pair of webers? Is what you get in return with that difference in price worth all the extra moolah? I really would like to know the answer to this question, especially in a street car, since I am seriously looking at getting it for a 2165 cc project. Any thoughts??

Steve Arndt · Post by **Steve Arndt** » Sat Aug 18, 2001 10:50 pm

It is probably best to get familiar with the motor on carbs. You can often sell dual carbs for at least what you invest in them! This makes it less of a chunk of change to deal with later when you are ready for more drivability and tuning options with FI.

Steve

<BLOCKQUOTE>quote:<HR>Originally posted by dimaggio:
Now, the question really is: is it worth the $1800 mackaroos instead of $700-900 for a pair of webers? Is what you get in return with that difference in price worth all the extra moolah? I really would like to know the answer to this question, especially in a street car, since I am seriously looking at getting it for a 2165 cc project. Any thoughts??<HR></BLOCKQUOTE>

dimaggio · Post by **dimaggio** » Sun Aug 19, 2001 8:05 am

Steve:
"This makes it less of a chunk of change to deal with later when you are ready for more drivability and tuning options with FI."

This still doesn't answer the questions I raised? Is what you get in return for the use of EFI worth the double in cost? I don't do any drag racing or any other racing for that matter other than at the light once in a while (rare), so what does the EFI unit have to offer me over the set of carbs? I am not being a pain in the ass, but I am ignorant about the answer to these questions. I am sure people that have had both in similar set ups or have gone to one from the pther can tell me what reall appreciable difference they see.

Alberto

pbanders · Post by **pbanders** » Sun Aug 19, 2001 5:28 pm

Alberto,

Here are some of the advantages of FI over carb systems:

1. Better fuel economy - the system can accurately tailor the A/F ratio for all conditions, reducing waste
2. Lower emissions - similar reasons to 1.
3. Better driveability - better on- and off-throttle transition, better cold start and warmup, better adjustment to altitude, better running in cold and hot conditions
4. Less tuning - once set, the system requires very little adjustment, fewer mechanical parts. If an oxygen sensor is used for closed-loop operation, the system is essentially self-tuning.

Brad Anders

Steve Arndt · Post by **Steve Arndt** » Mon Aug 20, 2001 9:14 am

In other words, it is worth it!
Steve

<BLOCKQUOTE>quote:<HR>Originally posted by pbanders:
Alberto,

Here are some of the advantages of FI over carb systems:

1. Better fuel economy - the system can accurately tailor the A/F ratio for all conditions, reducing waste
2. Lower emissions - similar reasons to 1.
3. Better driveability - better on- and off-throttle transition, better cold start and warmup, better adjustment to altitude, better running in cold and hot conditions
4. Less tuning - once set, the system requires very little adjustment, fewer mechanical parts. If an oxygen sensor is used for closed-loop operation, the system is essentially self-tuning.

Brad Anders<HR></BLOCKQUOTE>

Sharkey · Post by **Sharkey** » Sat Sep 01, 2001 2:15 pm

Brad forgot to mention the "kewl faktor".

OTOH, I still don't think the difference in price is worth it for most people. Most auto manufacturers use fuel injection nowadays because they are mandated to. The gov'ment sez "you gotta get your vehicle emissions down or you can't sell cars." For hotrodders and other old car enthusiasts, carbs are still very popular.

However, living here in the mild climate of the Pacific Northwest, I can say that my EFI runs much better in cold weather than my last engine-- that featured dual Dells. Perhaps a nice Weber progressive carb with its built-in fast idle and choke would have been better, but my Dells were horrible to drive once the temperatures dropped down close to freezing (or colder). So I guess it depends on how cold it gets where you live.

I initially went EFI because I wanted CB's turbo kit. By the time I was ready to drop the cash, however, the Dellorto supply had all but dried up and the kits were now only available with EFI throttlebodies. Wanting a CB turbo kit, I didn't have much of a choice. Now CB sells the kit with modified Webers, so you've got a choice again.

EFI is not just about tuning the fuel mixture for best power and economy, however. Aftermarket EFI also allows you to taylor the spark advance, and a whole lot more.

Visit my webpage for a breakdown of about ten different EFI solutions for the ACVW for more info.