I want to switch over to a carb setup with my '85 gsl-se. Still running the 13b 6port and was hoping to get some advise on an affordable setup. Also interested in a used kit if anyone has one for sale. Otherwise any advise on what to get to make this an affordable step would be greatly appreciated!

Thanks

 

racing beat setup is the way to fly ethier holley or weber setup both of the work better that the stinky SE FI sistem. you can check ebay.com and partstrader.com. they are usually use ones there.

 

A Holley 650 carb is the way to go. Since it has 4 barrels, the car can run both lean down at low rpm (giving you good fuel economy) and rich up top (high rpm). It's also the the only carb available with 2 fuel bowls, so it will never lean out.

Parts are available anywhere, and it easily can be converted to a blow-through Turbo setup if you choose to go that route later.

2nd choice would be a Dell'Orto side-draft setup, but those are no nonger in production, so parts are hard to come by.

3rd would be the Webber side-drafts, although none can give the top-end power of a Holley.

Check out rotaryshack.com for Webbers.
Check out Ebay for Dell'Orto's,
and PM me for Holley's.

 

I think i want to go with the Holley carb. How much do you think this conversion will set me back and if I bought a used setup, would there be anything in perticular to be careful of?

 

Check your PM's

 

Hey Directfreak, could you PM me the info on the holley as well? It looks like the kind of set-up I'm looking for.
Grant

P.S. Now all I need its a header first

 

Though I don't have the data, I would think that a dual weber IDA setup would out flow a Holley 650? It would also give the same advantage as the Holley four barrel too since with this setup you'd have two barrels per rotor with one on each tuned for low end and the other tuned for high end.

 

Both of the throttle plates on the webers open at the same time, and they have the same jets. That would also be waaay to much carb.

-Marques

 

I'm pretty sure you can tune the throttle plate opennigs on a dual setup otherwise you are correct that would be too much.

By dual seutp I am not saying dual 48/50 IDA's. I'm talking something like this local has:

That is all in his SA.

 

Ah just dual webers, not IDAs. I saw a manifold on ebay for dual weber downdraft 36's. I think the manifold was made by Rotary Engineering, but i'm not sure. I would like to see a setup like that in action.

-Marques

 

Holley is NOT the way to go. There have been many tests to prove it. A weber 48IDA carb makes more power than a 650 holley all the way to 7500 RPM. Now seriously how often are u going to be above 7500RPM? The weber IDA has more useable power.

I'm talking about a single weber setup. Nobody runs dual webers, on a rotary anyway. A weber dual setup would just be too much for the rotary.

I have a few friends with holley powered FC's and they both say if they could do it over again they would go weber.

Give Rob a call at Rotaryshack . He can set up with a absolutely sick weber system.

 

ok but what kinda of money are we talking about?

How much should i expect to spend on this Weber carb and manifold setup ?

I need the low down on the $$$ .

 

Nobody, eh? I just posted proof that somebody does.

 

that dual setup sounds really expensive..... any ideas on the cost of going that route and where to look for it?

 

Webber will be cheaper than a Holley. You can compare prices at www.racingbeat.com. Go into either Webber intake or Holley intake to see prices.

 

I doubt it. But I will give you the opportunity to prove me wrong.

 

What is wrong with going with a Nikki? Its much cheaper and will support up to 150hp easily in stock form and with a few mods, such as boring out the venturies, up to 200hp on a streetported 13B? This was the choice of the pre efi 13B rotary performers.

If you want more than that, the 48IDA is the best set-up around for a topend street car, and you can go one size higher if you are not looking at a daily driver.

Changing from EFI to carb will need mods to the fuel supply but its much cheaper than going the other way!

 

remydrm-
Making a carb choice is best done by doing quiet research on your own. Asking what carb you should get for your car here is like asking which religion is the most sensible. Everybody's got an opinion that they're certain is correct but can't really prove.

- Or they're trying to sell you a carb, like me. (I'm a no bullshit kinda guy...I wanna sell you a carb. )

If you want complete tunability throughout the entire rpm range that the rotary will make power, I can build you a modified Nikki carburetor that I will happily put up against all the other options.
I have no proof, but I believe my carburetor will offer you the best driveability, the best tunability, and maybe even the highest peak HP. I can afford to make such a bold challange because I offer something hard to find in the aftermarket performance parts world...

...a money back warrantee.
-If you don't like it, you can send it back and I'll refund your money. (thirty day warrantee)

You would have to locate a manifold though.
Email me if you're interested.

 

The dual Weber DCD setup sold by RE was a decent performer, lots of low and midrange power, but not quite enough top end. Plus, they are a hassle for most people to keep synchronized. They do look really cool, though.

Interesting thought about the NIKKI, but I would go with a modded Hitachi over a modded NIKKI any day.

 

...and you have alot of those kicking around, do ya?
I mod the later Nikkis the same way as the earlier ones. The only real difference when I'm done is that the early Hitachis (they're all Hitachis) don't have all that extraniuos emissions plumbing cast into the main body.
They would perform exactly the same side by side.

 

I guess here are my concerns. Everywhere I look, people complain about the Webers being terrible at low rpm punching of the throttle. I hear Nikki's require constant tuning and fiddling as do the Delortos. It seems the only true down fall to the Holley is tha they have very little low end power and scream at the top of the power band.
I am looking for a very simple carb to tune and leave alone when its done. Not constantly toy with. Secondly I am road racing this car so I really won't need the low end power. So far the Holley sounds like the one that suits my needs.
Am I on the right track? Have I pointed out the right differences to the different units and if not, I would greatly aprreciate being set straight. All the information I am getting has been a tremendous help as its all in one place and on one thread. I hope you guys can keep it coming.
And this is in no way a feudal effort, I will be buying some thing this week.

thanks again


btw
I should remind everyone, this is for a '85 se with a 13B 6 Port.

 

ok, now for the stupid question

Why do some carbs use horns or velocity stacks and other don't. (weber vs holley)

Sorry, I'm very new to the carb world......

 

I gave away most of the old carbs I had, but I've still got about 4-5 old RX2 and RX3 carbs laying around.

Why, you want one?

 

I'd love to see some videos/sound clips of stockport 13Bs with carbs. Apparently the sound is quite intoxicating. As far as gas mileage goes, would a *decently* tuned Weber 48IDA give better mileage than a *shittily* tuned stock SE EFI system? The 48IDA should provide quite a bit more punch than stock EFI shouldn't it? I already have Mindtrain 2.5" headers and exhaust with no cats. What kind of gains would I be looking at with either a Holley or the Weber? I'm open to all opinions here!

I don't mean to hijack the thread, merely just to get everyone back on the right track.

Zac

 

Absolutely! I PMed you.