1st Generation Specific (1979-1985) 1979-1985 Discussion including performance modifications and technical support sections

Rotary Shack Weber 34 Kit Install

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Old 07-03-09, 12:51 PM
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Originally Posted by 680RWHP12A
for all the haters and non believers out there, i have bad news for ya!

there are now 22 kits on the road and fuel economy reports are great..
funny how there are always the non believers out there, same thing happened with my 12A turbo that made 680 rwhp in '99, nobody online could believe it made that much power, but the local guys that witnessed the beast in action knew what was up

with all the nikki carbs worn out the 1bbl carb kits are a fresh new alternative fuel friendly carb kit that offers out of the box improved of low end performance, better starting and great fuel economy


i have customers that go to extremes for maximum fuel economy. a few examples would include taller tires, installing a GSL_SE tranny for the taller 5th gear, vacuum guages installed to monitor while driving, mixing fuels, 1bbl carb kits.
here is some pics of a recent customer that stopped by the shop to show off his 1bbl carb kit. he averages over 900 miles a week commuting in his rx7 fyi
What kind of mileage are your customers reporting and how much are you selling the kits for? How much fuel pressure do you need to run?
Old 07-03-09, 01:02 PM
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Originally Posted by Nphocus
What kind of mileage are your customers reporting and how much are you selling the kits for? How much fuel pressure do you need to run?

average is in the 37mpg to 42mpg for the guys light on the throttle.

2 psi seems to be the ideal pressure for best mileage
Old 07-03-09, 01:56 PM
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I've seen this kit in person on two different cars and both owners love it. Definitely a great product and it does it's job very well.
Old 07-09-09, 08:44 PM
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The solenoid on my starter went out last week, so I haven't had a chance to drive as much as I wanted.

My last tank is up to 17.522 MPG (120.1miles on 6.854 us/gal...I was really hoping for better) driving like grandma (shifting under 3k in most cases and trying to run about 1.5/2k). While I had the car jacked up to switch out the starter I noticed fluid standing on the rear drivers side brake. If that brake is dragging (or whatever it is bad brakes do) how bad would it drop my mileage?

I replaced the brake master cylinder last month due to it physically dumping fluid into my floorboard, but i guess it wasn't the only thing leaking. :P

On the plus side it's running much better once warmed up, but I'm still not 100% sure how I should choke it to start. Sometimes it seems to like full choke and then backed off to about 25% choke. Other times it seems to like 25% or even no choke at all.
Old 07-10-09, 12:13 AM
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That brake fluid leaking from the rear drum is 100% going to be a bad wheel cylinder. They're cheap and easy to replace. It's the rectangular cylinder shaped thing at the top middle. Generally when they go bad, you have reduced to no braking on that wheel and you find yourself adding alot of brake fluid for some reason.

When I replaced my starter/solenoid assembly on my 83, I replaced the stock coarse aluminum wire starter wire that goes to the battery with 0 gauge copper wire and I also wired the ignition directly to a seperate hidden starter button. This is a nice security measure as the car no longer starts via key alone and you can crank the car with the ignition and fuel pump off for those times when it's flooded.
Old 07-10-09, 01:32 PM
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I've got rear disc, but I figured it's something similar. Autozone seems to sell a 'brake caliper kit - rear' for 25 bucks. Is that for both rear brakes, or just one?

Also, why does a front kit only cost 3 bucks? Looks like the rear kit only has one more part in it...

I guess it wouldn't be possible to nab the front calipers from my 85 and put them onto the rear of my 84? Are the rear calipers larger/different?
Old 07-10-09, 01:37 PM
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I could be wrong, but the calipers should be the same. Do they both have vented rotors on the rear?

25 bucks seems alot for just a rebuild kit. It's basically just an 0 ring and some boots.
Old 07-10-09, 01:51 PM
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Rear calipers have the parking brake mechanism in them and are more complicated that the fronts. Thats why the kit costs more I would imagine.
Old 07-10-09, 01:52 PM
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Originally Posted by falcoln0014
I've got rear disc, but I figured it's something similar. Autozone seems to sell a 'brake caliper kit - rear' for 25 bucks. Is that for both rear brakes, or just one?

Also, why does a front kit only cost 3 bucks? Looks like the rear kit only has one more part in it...

I guess it wouldn't be possible to nab the front calipers from my 85 and put them onto the rear of my 84? Are the rear calipers larger/different?
The rear calipers are smaller, and they have a more complex internal structure because of your parking brake(hand brake w/e). That's why the kit is more expensive as well as why the two aren't swappable.
Old 07-10-09, 11:10 PM
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Originally Posted by 680RWHP12A
for all the haters and non believers out there, i have bad news for ya!

there are now 22 kits on the road and fuel economy reports are great..
funny how there are always the non believers out there, same thing happened with my 12A turbo that made 680 rwhp in '99, nobody online could believe it made that much power, but the local guys that witnessed the beast in action knew what was up

with all the nikki carbs worn out the 1bbl carb kits are a fresh new alternative fuel friendly carb kit that offers out of the box improved of low end performance, better starting and great fuel economy
You have any dyno sheets or real data to back those claims up?
Old 07-10-09, 11:21 PM
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If these carbs had a money back guarantee (if you return an undamaged carb) with like a 30 day warrenty that your gas mileage will increase to at least over 30mpg AND retain factory like Nikki performance give or take 5 horsepower or so and not loose any top end RPM or run out of fuel at 6,000 plus RPM on very heavy acceleration or when taking a sharp turn on heavy throttle..

Dyno comparison a 100 % stock Nikki car in good shape and dyno the same car with the Weber. If the results are really good. Show them off.

If you prove that this setup works, and price it at under $300 for the carb and adapter (Am I too cheap?) So many people would be buying this carb it's not even funny. I would buy one.
Old 08-26-09, 01:54 PM
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Come on guys....where are some REAL numbers??? Lets see some numbers from people who actually bought one. I am considering one for a car that I will be doing a 400 mile trip every week.
Old 08-26-09, 02:38 PM
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If someone decides to take their car to the dyno that's on them, but as far as getting "real data" for you all, we're in no rush. We've sold 24 kits to date and are very pleased with with thus far. If you wanna buy one, go ahead, if not you can wait for someone to provide "real data". There's been too many times that all people want is a dyno sheet, and in then end after it's provided and the numbers show to be true, they don't come through and purchase one, that's why were not so interested in doing this cause you all can't promise you'd purchase one if the numbers are present.
Old 08-26-09, 02:58 PM
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common sense prevails....

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Originally Posted by Kerebrus
If someone decides to take their car to the dyno that's on them, but as far as getting "real data" for you all, we're in no rush. We've sold 24 kits to date and are very pleased with with thus far. If you wanna buy one, go ahead, if not you can wait for someone to provide "real data". There's been too many times that all people want is a dyno sheet, and in then end after it's provided and the numbers show to be true, they don't come through and purchase one, that's why were not so interested in doing this cause you all can't promise you'd purchase one if the numbers are present.
Look...I am glad you guys are making this and if it produces the numbers, I am in.

I work in engineering...I like to see data and repeatable data.

If this carb produces the numbers, you should have a hit on your hands..
Old 08-26-09, 03:08 PM
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Originally Posted by 80's old school
Look...I am glad you guys are making this and if it produces the numbers, I am in.

I work in engineering...I like to see data and repeatable data.

If this carb produces the numbers, you should have a hit on your hands..
We've told many customers to get some numbers for us to show online, it's up to them if they want to do so. We don't have time ourselves to slap on a car and hit the dyno, just too busy.
Old 08-26-09, 03:36 PM
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However, as a business, you guys are stating certain results from this product. It should be on your shoulders to produce proof that your product meets your claimed specifications.

So far, all I have heard from your customers is that they are having a hard time getting the results that have been claimed. It is not the customer's responsibility to proove that your product meets your stated claims, it is your responsibility....

You are making big claims, but offering no proof that it actually works. You say that you've sold 24 kits and everybody loves it, but you could just as easily say you've sold a hundred of them. Who's to know?

Is there a money back satisfaction gaurantee? I suppose that would cut the risk somewhat, but still not as good as (proven) facts and data.

But still, I wish you luck with this. It would be great if it really works as stated.
Old 08-26-09, 03:55 PM
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I agree with Ken. For a dyno, you could do a run with the stock nikki and then another with this carb. Shouldn't take much time or cost. I suspect that a customer would have no problem letting you do this with their car as they are probably interested in the results as well.

For MPGs, it is a little trickier. You need real world driving with different cars and different drivers. People associated with the 'Shack couldn't really do this either as there would be potential bias. It would be nice if a few of the 24 buyers would post up some real world numbers. If you can back up the claims, you will get a lot more sales.
Old 08-26-09, 06:57 PM
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I agree that Rotaryshack should post dyno results. Be even better if a dyno owner would sponsor some of the cost. Real world mileage, buyers should assume the responsibility to share their honest results with others here on the forum. I would "expect" some loss in top end power, and this would be acceptable if it delivered on the mileage.
Old 08-26-09, 06:59 PM
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Also, having dealt with Robert I can say he is protective of what others think and say about him, and he is honest about his faults too. I do not think he would screw the community and ruin his reputation if this product did not provide positive results.
Old 08-26-09, 07:51 PM
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Originally Posted by 84stock
Also, having dealt with Robert I can say he is protective of what others think and say about him, and he is honest about his faults too. I do not think he would screw the community and ruin his reputation if this product did not provide positive results.
I agree that Robert wants to protect his reputation...

Put it this way....lets say earlier this year when Honda reintroduced the Insight and they said......."well it should get good gas mileage.....we really don't have time to test the gas mileage.....but our customers are happy......maybe some of our customers should post their real world mileage figures".........

When you look at it this way Kerebus.....what you said really does not make sense..
Old 08-26-09, 07:57 PM
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I would really like to hear from the original poster and see how he is doing with the carb kit now that he's had plenty of time to live with it... and if he's getting at least 30mpg...

... I know I tried disconnecting the mechanical secondaries on my car and running at highway speeds... slow is an understatement. You could do it around town under 45mph and stay quick with the shifts... but 65 is about the max I could hit on a downgrade.
Old 08-26-09, 11:08 PM
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I just bought a 94 Miata to DD and use my 7 as a play toy now. I don't care about MPGs for it anymore since nobody will show actual proof or dyno numbers for it. If I could find real numbers for this carb I would consider it for a 12a swap into the Miata.
Old 08-27-09, 02:40 AM
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I don't see it being very difficult at all to see the numbers Robert's claiming. Stu has reported 30+mpg on an FB Nikki. I myself have gotten almost 29 mpg on an SA Nikki leaned out. The SA Nikki's ran richer because of the Thermal Reactor system so I could have easily gotten 30+mpg on an FB Nikki in the same conditions. A single barrell carb designed specifically for fuel economy shouldn't have much trouble hitting high 30's to low 40's.
Old 08-27-09, 07:05 AM
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common sense prevails....

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Originally Posted by FirebirdSlayer666
I don't see it being very difficult at all to see the numbers Robert's claiming. Stu has reported 30+mpg on an FB Nikki. I myself have gotten almost 29 mpg on an SA Nikki leaned out. The SA Nikki's ran richer because of the Thermal Reactor system so I could have easily gotten 30+mpg on an FB Nikki in the same conditions. A single barrell carb designed specifically for fuel economy shouldn't have much trouble hitting high 30's to low 40's.
Thats great, but come on folks....bring on the proof!!
Old 08-27-09, 07:35 AM
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someone should try an old honda 3 barrel!


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