Badfun's

Crunch

2009-10-18T10:07:00.000-07:00

In early October I was hit in the back left bumper, I doubt I'll fix it :(

Smooth sailing?

2009-05-27T10:46:00.000-07:00

Time to update the total money spent portion of this blog. This last month I have done the following.
Clutch & throwout bearing
front yoke and back u joints
piped it from headers back and added a muffler
+1100 bucks.

Rotary resurrection

2009-05-17T14:10:00.000-07:00

rotary resurrection

wiring diagrams

2009-05-17T13:41:00.002-07:00

Rx7 wiring diagrams

wiring diagrams

2009-05-17T13:41:00.001-07:00

Rx7 wiring diagrams

ATF Treatment By BOBRx-7

2009-02-07T21:53:00.001-08:00

ATF Treatment By BOBRx-7

Restoring Compression � The ATF Treatment

One of the more common reasons for failure of rotary engines is actually very preventable and in many cases reversible. This entry will cover just how it�s done and why it works 95% of the time.

Rotor Seal Design

The rotary engine is among the simplest in overall design. No valves, cams, heads or any of the parts commonly associated with piston engines. This makes them extremely reliable with one major exception. . . the apex seals.

To seal the three tips of each rotor, a groove is machined to accept a long thin cast iron (in stock engines) insert. This is the apex seal. A spring, located behind the seal, applies the force needed to hold the seal in contact with the rotor housing wall as it passes around the inside housing wall. As the apex seals pass the narrow points in the housing, they are compressed against the springs and then move back outward in the wider parts of the housing. A corner seal at each end of the apex seal is also spring loaded to prevent combustion gasses from leaking around the ends of the rotor tip. Additional seals on the sides of the rotor complete the set to form a relatively leak-free chamber.

Over time, carbon, ash and oil sludge deposits will accumulate in the machined groove in the rotor tip. If allowed to remain, the apex seals will eventually begin to bind in the grooves and will not move outward completely during the combustion cycle or intake cycle. This allows gasses to escape into the next chamber, reducing compression. In the extreme, the apex seals will stick in the compressed position to the extent that virtually all compression is lost. At this point, the engine will likely refuse to run at all.

Dirty oil and general lack of maintenance is the most common cause of compression loss. The oil injection system on the rotary is designed to feed oil in to the chamber to keep both the housing walls and the apex and corner seals lubricated and clean. Dirty oil will simply throw grit, sludge and other combustion debris back into the chamber. Result, thousands of perfectly good 12A and 13B engines, or complete cars, rotting in the junk yard, for no good reason!!!!

Preventive Care

The obvious solution here is consistent oil changes. Never more than 3000 miles between changes and good (spelled Castrol GTX 20W50) oil with a new filter. By the way, the puny little factory filter is COMPLETELY inadequate. A remote filter setup that will allow the use of a 1 qt. filter is much better. At the very least, use a K&N or WIX filter in the stock location. These will filter particles down to 10 microns. A better oil cooler on those 83-85 12A engines is also an excellent idea.

The Fix

So what if your engine is already suffering from the dreaded sticking/seized apex seals, you ask?? Never fear. An old mechanics trick used to free up sticking valves and lifters works WONDERS on your rotary. The procedure works a little differently for carbureted engines that the EGI models, but accomplishes the same results.

1.

Disable the ignition primary circuit by disconnecting the igniters or the negative lead on each ignition coil.

2.

Remove the air cleaner lid on carbureted engines, or pull the Leading (lower) plugs on 13B EGI engines.

3.

For carbureted engines, pour 2 oz. Automatic Transmission Fluid (ATF) (the cheap stuff is fine) down each primary bore (the small ones) of the carb, while an assistant cranks the engine for 5 seconds or so. On EGI engines, use an oil squirt can and pump two or three shots into leach leading spark plug hole. Have an assistant lightly bump the starter two or three times, squirt in more oil, bump the starter, squirt, bump, squirt, bump. . . you get the idea. You want to get ATF in all chambers and thoroughly distributed. Reinstall the spark plugs on EGI engines.

4.

Allow the engine to sit in the ATF stew for AT LEAST 24 hours. Don�t be tempted to rush the process. This takes time. The detergents in the fluid, used to keep the small polished valves in an auto trans valve body free, will soften the carbon and sludge deposits.

5.

PLEASE. . . Make sure the car is outside for this step. You'll see why. Reconnect the ignition system, hold the throttle open � way on carbureted engine and start it up. Allow to idle. The neighbors will now think that Mt. St. Helens has erupted in you driveway or a massive brush fire has broken out. It will take about 5 minutes for the smoke to clear completely, since some of the ATF has worked it�s way into the exhaust pipe and must be burned off.

6.

Install a new set of plugs. The ATF will foul the old ones and may cause hi-speed misfire. Take the car out on the e-way and THRASH IT for a few miles to completely clear the chambers. 6 to 10 redline runs will do it.

At this point, the apex and corner seals can move freely again. In extreme cases, you may want to repeat the treatment after a week or so of driving. If so, hang on to the old plugs to use again for the second treatment.

If you were to perform a before and after compression test, you could potentially see an increase of 20 psi or more and will feel a whole lot of power that wasn�t there before. I have revived engines that would not start and know of a couple ITA drivers running junk yard engines brought back to life this way.

IT�S CHEAP. . . IT WORKS. . . And you can end up with a nearly new engine for $2. You�ve gotta love it!!

HAPPY ROTORING!!

Bobrx7

Neko Scca solo II event

2008-09-07T15:45:00.001-07:00

Saturday I attended The NeOk Scca September to remember Event day one. I did eight runs around the course.It only took runs five to make a clean finish. It's actually a lot harder than it looks, When those cone are coming up on you fast you HAVE to discern what direction you need to go next and how to set up the next corner in a matter of a split second if you miss a cone you DNF, it is quite a rush. You can run up to two "classes" per day.Each class you pay for gets you four runs on the course. The cars class was the first four runs, 3 DNF's (did not finish).Second Class was the driver level, I was entered into Novice.Out of the 20 plus I was 11th.All in all it was really fun.I did some ride alongs as well, some of the guys out there are fantastic drivers.Here is some photos I took.

Craigs list FTW! wheel & Tires+Lugs=$250

2008-08-31T09:05:00.000-07:00

Can't help my self $50 bucks

2008-07-23T17:42:00.000-07:00

I really did want these bad.The Amp has been sitting around the house for a while now unused, it was begging for me to install it.As you can see in pic #2 The edge is pinched to I had to take the covers off and mod them.That is a temporary spot for the Amp until I figure out a better place.

All Progress has been halted.

2008-07-21T19:42:00.001-07:00

So many things I still want to do, but the cash flow will not allow me to.Until I have saved enough to buy that Mazda Miata for my wife.So for now It's just enjoy what I have done so far.
On a different note I filled up the Rx today and it will hold 15 gals that was 57 bucks omg!!

Main power window switch arrives!

2008-07-17T18:41:00.000-07:00

The switch came in today but it would only roll down the pass side down not up and didn't work at all on the driver side. So took it apart and cleaned it just like I did before with my old ones and it was DIRTY AS HELL after I put it back together I was good to go.

It was a good day.

2008-07-16T17:45:00.000-07:00

A buddy of mine told me about this spot, it was great for changing the fluids, Transmission and rear end.I really can't tell a huge difference so far but I was covered in sweat and oil and just wanted a shower.I'll wait for judgment on the Red Line MTL.

So today my brakes got fixed,put some used tires on and changed the fluids.Hopefully my power window switch will come in soon.
All that will be left is the O2 sensor and the fuel filters,oh and a relay for the radio.

17 MPG

2008-07-16T13:02:00.001-07:00

Thats what I got on the last tank of fuel.

Rescheduled Delivery: 07/17/2008

2008-07-16T13:00:00.001-07:00

So I am hoping to have the window switch in by tomorrow.

Red Line MTL and LSD fuild.$60 bucks

2008-07-16T12:55:00.001-07:00

Adding this to my Trans mission and rear end later today. Hopefully it will go as smooth as the brakes did today.

So far so good

2008-07-16T12:48:00.001-07:00

Got some decent used tires today, and Jake helped me bleed out the brakes one final time and now they kick ass.Jake also got me the hook up on the tires.Thanks doode!

Wed the 16th a big day.

2008-07-15T20:50:00.000-07:00

A buddy of mine is going to help me with the brakes,and another buddy of mine found this great spot to change out the transmission fluid and rear end fluid without having to jack up the car I'll post some pics if I remember to bring my cam.Wish me luck.

Finally!

2008-07-15T20:45:00.000-07:00

I WAS OUT OF STOCK ON THIS PART WHEN YOU ORDERED IT...I HAD A FRIEND OF MINE SHIP IT TO YOU. THEY SHIPPED IT TO THE WRONG ADDRESS, BUT HAD IT CORRECTED. I WOULD IMAGINE YOU SHOULD HAVE THE SWITCH TOMORROW. PLEASE CHECK BACK WITH THIS TRACKING NUMBER TOMORROW FOR AN UPDATE ON THE SCHEDULED DELIVERY DAY. WE HAD SOLD OUT LOCALLY AND DID NOT REALIZE THAT OUR LISTING WAS STILL ON EBAY. I DO APOLOGIZE FOR ANY INCONVENIENCE IN THIS.

Woot!

AM reception whoas.....

2008-07-15T18:45:00.000-07:00

as mentioned above the power antenna's trigger is ground (or - ). With all after market radio's antenna output as 12 volts positive (+). To make a stock power antenna work you need a relay wired like this:

Bummer just one more thing to do.

JVC Buget stereo deck $50.00

2008-07-13T19:44:00.000-07:00

Camo seat covers $13 bucks

2008-07-09T13:33:00.001-07:00

Now I am almost ready for my urban assault. :P

ebay the salvage yard of the future! $91 bucks

2008-07-08T16:28:00.000-07:00

I ordered a driver side window switch today off ebay.

NGK plugs FTW! $22 bucks

2008-07-08T14:15:00.001-07:00

Look how much room you have when you do the plugs. I never had such easy time doing Sparkplugs.

The first plug I pulled out was actually in the best shape.The electro on the leading plugs were almost gone.

Power window woes...

2008-07-03T12:38:00.000-07:00

New battery $65 bucks

2008-07-03T12:36:00.001-07:00

Got a new battery for it today the old one tested bad.

June 28th

2008-06-29T13:53:00.000-07:00

Dead battery :( Funny thing about this is it sat for 9 moths I jumped it drove it home and filled up the battery with water and jumped it again and is been fine for 3 weeks.Me doth wonder if it has an electrical issue?!

june 28th

2008-06-29T13:49:00.000-07:00

This was the 3rd brake bleed for the car and its still not braking right.
It may be time for the shop. :(

June 20th $70 bucks

2008-06-29T13:47:00.000-07:00

Changed out the brake master cylinder.

June 12th $65 bucks

2008-06-29T13:45:00.001-07:00

Changed Oil and filter as well as new air filter. miles 142323