I'm currently looking for ways to make my N/A FC have a little more pep and i figured a weber intake system was the best route short of turbo so what i'd like to kno is what sorta gains am i looking at from the setup and what other parts would i need, e.g. fuel pump, afc, etc., to have my car run properly?

 

To do a weber setup, you would need the carb and intake manifold. The carb assembly shoul include all the necessary items such as throttle cable, jets of varying sizes, venturi's chokes, etc unless you get a carb that was from a 13B rotary motor.

Then you need to get a fuel pump that is low pressure, adjustable fuel pressure regulator and an acurate guage from 0-6 or 7 PSI.

Then the type of carburator is also important.... downdraft, sidedraft, 2 barrel, etc.....

No AFC is needed dince you don't have an O2 sensor or FI.

You don't want to carb a FI car for daily use, nor do you want to tackle this project if this is your first time getting "down and dirty" with your car, which I suspect it may be for you.

Just throw on a RB header and be happy that you didn't have the headaches of a carb.

Joe Breese
90 GXL
85 Base (dellorto power)

 

already got the header.....just looking for a tad more power...

 

You're probably not going to get all that much more. you might see a few , but for the added expense I wouldn't recommend it.

 

Yea Keep it FI, I think the Gain your talking about would best be achieved with Turbo, and even then is a lot of work ... hope the seven isn't your daily driver=)

 

talk to Racing beat about carbs. they have seen great gains with them and have complete kits that bolt on in an afternoon. these guys have been spioled by FI, and they no longer understand some of the benifits assosiated with it. Your car will never be able to pass amissions afterward though.

 

!! Finally !!

I've been waiting for someone to say that carbs do have their benefits...EFI is just good for cleaning up everything. A used setup should run you a few hundred, then rebuild the carb. Mikuni made some great carbs for the rotary, cept finding them is going to be next to impossible (very cherished carb).

A carb'd streetport 13B can easily get around 200-215 HP with a lil tuning.

 

I think both setups are good. The biggest factor with either one is your knowledge in properly tuning them. If you are familiar with the carb and don't know much about FI then it only makes since to go carb. If you are more familiar with FI.....................

You get the point. They both do the same thing just in different ways.

 

Carbs do have their benefit, I even have Dellorto on my 1st gen. The problem is not aquiring, installation or even power potential. Tuning the carb for the specific engine and altitude is a bitch. Let me repeat, tuning is a bitch. EFI is not just good for cleaning up everything. EFI will give more HP than a carb anyday humid, dry, low altitude, high altitude. Some of the top racers are using EFI when allowed since throttle response and power is more refined. EFI is a better way to go, but Carbs can sometimes offer more power than a stock EFI system. The money one spends on a carb setup to gain more power can ofen be used to fix any glitches in the EFI system with similar or better results.

Carbs are not the end all say all solution to simple horse power. Yes they are more simple to tune initially, but to extract the most amount of HP, you need just the same amount of understanding as you would an EFI set-up for similar gains.

JB

 

I don't want to turn this into a flame war but I need to say this! Apart from cost, a carb has no advantages over EFI. EFI is not that complex so don't say it is! The only way you'll make more power over EFI is if the carb you select can flow more air than the stock EFI setup. The obvious answer to this is to use aftermarket EFI throttle bodies on a Weber style manifold and a Haltech or similar. You don't mention cost as a factor in your decision so I'd highly recommend this setup if your goal is more NA power, plus you'll retain all the advantages of EFI as mentioned above.

 

LoL here we go again NZ

It's one thing when you guys can buy after market computers for half what we forced to pay here in the states.

Haltech USA is the exclusive importer of Haltechs
They DO NOT pass any saving they get from the currency exchange rates to us.

Autronic also has a exclusive importer

EFI Hardware
Has a weber sytle EFI throttle body for near $400
exlcuding injectors.
and options

Then they Got a Hawk EC21 programmle windows based
system for a very good price
$600 USD excluding options
Has great features if your staying N/A
but lacks Turbo features.


So your going to spend 1,200.00+ USD
2,871.94+ NZD

on this setup excluding the cost of Dyno time
Tuning issues

or you spend $600 for a good used Weber or Mikunni
system with a FB distributor

I would think Racing Beat would know there stuff
They were the pioneer's of our cars aftermarket accesories

 

OK, fair point. Those are some crazy prices! What I can't work out is why Australia has ended up being the aftermarket EFI capital of the world!

I'm quite sure they do, but even they'll tell EFI is better

And I still hate carbs...