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Just bought an FB 13B PP racecar

Old 02-07-05, 01:17 PM
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Kim
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Smile Just bought an FB 13B PP racecar

Hi guys, ive been browsing this section of our great forum for quite a while, now finally im the proud owner of an ex two times Danish Championship FB.

Bought the Car with a fellow rotorhead. We will soon start fixing her up for some racing.

It needs a new 4.88 diff.pinion.
and some other minor stuff.
Motor is MFR 13BPP housings, there is an extra motor with the car, also MFR but one housing is cracked by the leading sparkplug
extra wheels and raintyres

Ill start fabbing some glassfiber hood soon and the wing will be replaced with an IMSA style eventually.

Let me know what you think about it, any suggestions are more than welcome

Pictures are on my site.
www.wankelkim.net/rx7/fb/
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Old 02-07-05, 02:08 PM
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Was just told by Rotary Emotions that its a SA rather than an FB.
Ohh well im not that familiar with first gens.
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Old 02-07-05, 02:52 PM
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What's up with the rearend? Is that the setup I think it is?

Nice looking car. What series will you run with? Sprint or endurance racing?

Looks like you'll have your hands full, good luck.
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Old 02-07-05, 03:09 PM
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Thanks Chris
Im set on running some Super Saloon class here in DK, its an open class, allmost anything goes. The car won this class two times before, in that class there are a few Porsches, Lotus´, BMW M1 or atleast it used to be.

What do you mean by rearend setup? im not so familiar with first gens, please fill me in...

I know youre thinking the same thing. "The wing has to go" It will.

Post up sites or any info, im input-hungry
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Old 02-07-05, 04:18 PM
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The cars come stock with a Watts-link. Here in the states a common rear end geometry change is a 3-link and panhard bar. The setup on your rearend, from one of the pictures, doesn't look anything like either. Looks almost like a 4-link, but I only saw one picture of the driver's side part of the rear.
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Old 02-07-05, 04:30 PM
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It's a racecar. Keep the wing.
Is it ugly? Yes. Is it functional? You betcha.
If you were just gonna autocross it I'd say ditch it.
But you plan on racing on a track where downforce will play a role.
At least drive it a few times with the wing on before you ditch it so you have somthing to compare with. You have nothing to lose. If you dont like the way it handles at speed then change to the imsa style wing.
racecar=function over form
Just what I'd do if'in it were mine.
And I wish it was.
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Old 02-07-05, 04:55 PM
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Originally Posted by elron90sc5speed
It's a racecar. Keep the wing.
Is it ugly? Yes. Is it functional? You betcha.
If you were just gonna autocross it I'd say ditch it.
But you plan on racing on a track where downforce will play a role.
At least drive it a few times with the wing on before you ditch it so you have somthing to compare with. You have nothing to lose. If you dont like the way it handles at speed then change to the imsa style wing.
racecar=function over form
Just what I'd do if'in it were mine.
And I wish it was.
Id figure that an IMSA spoiler would generate plenty of downforce
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Old 02-07-05, 05:23 PM
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^I'm with elron90sc5speed.

You guys are going to have a blast with that thing.

Cheers
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Old 02-07-05, 05:33 PM
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Hey Kim! Good to see you own a real race car with a hopefully good 13 PP motor! Do you plan to come up to Sweden and do some drifting this year??
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Old 02-07-05, 06:03 PM
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I'd strongly suggest beefing up the driver's side roll cage anti-intrusion bars if you plan to race it wheel to wheel. Here's a picture of my driver's side door bars for comparison:



The rear susupension looks like a stock setup with the bottom mounts relocated down and converted to a coil over setup. It looks like the watts linkage is still there, but it has been modified with hiem joints (rod ends). Drive it. If you like the way it handles don't change it. If you don't like how it handles, a panhard bar could be a viable option.

-Trent
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Old 02-07-05, 06:33 PM
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That's the funniest looking Watts I've ever seen if it is.

Oh, and Kim: change the rear safety belt mounting setup ASAP!
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Old 02-07-05, 07:27 PM
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I might as well jump in with my 2 cents worth about the rearend lateral suport dvise. From the minimal pictures it looks like a Panhard bar attaching to the chassis on the drivers side & to the axle on the passengers side.

EDIT: Please see pictures #1 & #13.

Have Fun ; )
David

Last edited by ddewhurst; 02-07-05 at 07:34 PM. Reason: additions
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Old 02-07-05, 08:07 PM
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holy cow that's a BFW. (big frikkin wing).
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Old 02-08-05, 01:43 AM
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Yup - it has a panhard, and the bracket that it connects to is braced half way down with the short piece that looks kind of like half a watts link. The lower link on that side is visible, but it's hard to tell how the rest of it hooks up.
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Old 02-08-05, 04:03 AM
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Im coming to Sweden Lasse, but no drifting. I miss Kinnekulle Ring

Seatbelt mount will be redone as it needs new belt,seat and fuell cell to comply with FIA.

Side impact protection is a must and will be done.

Kim
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Old 02-08-05, 10:56 AM
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Congratulations on your new racer. The back of the car definitely has SA22C model tail lights, that means 1979 or 1980 model years.

That is the strangest looking rear suspension; I can't quite figure it out from the photos; maybe there are more parts that I can't see in the pictures.

The intense radiant heat from the exhaust will overheat your transmission. You will need to add some simple sheet metal heat shields between the pipes and the transmission.

The entire roll cage needs to be upgraded to provide protection and chassis stiffness for better handling.
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Old 02-09-05, 05:27 PM
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I will take pictures of the rear suspension tomorrow.
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Old 02-09-05, 06:18 PM
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BTW, Ive been looking for Fuelpump specs.
My racecar has an BMW E30 320i fuelpump that needs replacement.
What do you guys reccomend?
With specs please.

Guess I gotta do some serious sucking up, as its not the last time Ill ask noobish questions
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Old 02-09-05, 06:25 PM
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Now that's a rear wing! Good car to start with. Lots of surface rust........ I'd be temped to spray down the brown stuff with WD-40 every time I worked on the car.
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Old 02-09-05, 07:15 PM
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If it's already won some it must be doing something right I'm curious about the rear suspension as well. Looks like a big panhard rod. Don't see a tri-link. But I don't see the upper links either??? Cool car though. Ya'll notice the spacers between the struts and the lower control arms on the front suspension
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Old 02-09-05, 11:32 PM
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Yea Those look like the Tri Link Turn In Spacers
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Old 02-10-05, 09:53 AM
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Originally Posted by speedturn
Congratulations on your new racer. The back of the car definitely has SA22C model tail lights, that means 1979 or 1980 model years.

That is the strangest looking rear suspension; I can't quite figure it out from the photos; maybe there are more parts that I can't see in the pictures.

The intense radiant heat from the exhaust will overheat your transmission. You will need to add some simple sheet metal heat shields between the pipes and the transmission.

The entire roll cage needs to be upgraded to provide protection and chassis stiffness for better handling.

I have the FISA papers on this race car and it is a SA22C model and inside the logbook, first registered in 1981

Looking at the competition preparation papers. Rear suspension is a Watts link assembly. It has drawing with part numbers

I read somewhere on this forum, you are using a Holley blue fuel pump, is this correct? We can easily replace the pump that was used before from a bmw, unless you recommand we don't. We will find flow numbers on both in the meantime.
Kim also checked the spark plugs and the last owner used Nippon W37EPT. So far, we see Mazdatrix and Racing beat both sell NGK R6725-115. Which would you recommend or should either spark plug type work fine?

Thanks for all the recommendation and comments from everyone!.
Oliver
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Old 02-10-05, 10:08 AM
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We also need to replace the short nose ring & pinion , Size (4.875) part # 131227 110A

I see Mazdatrix sells this for $412, Racing beat $475
We are checking prices in Europe but does anyone know of other places we should contact first in the States?

Regards
Oliver
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Old 02-10-05, 02:47 PM
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Thanks Oliver
I have found out that the BMW e30 fuelpump thats mounted to it produces about 80-85psi which is kindda overkill. I can crank the motor but it just floods.

My question this time is: Is this fuel set-up right?

Pump-Carb-FPR-Return.

I find it kindda odd that the fuel pressure regulator is mounted AFTER the carburettor, this way im assuming the carb gets the full 80psi from the pump, am I right.
Gas is litteraly dripping out of the exhaust. I would think that the FPR should be located BEFORE the carburettor, right?
this is what it looks like.
http://www.wankelkim.net/rx7/fb/fprwtf.jpg
http://www.wankelkim.net/rx7/fb/fpr(1).JPG
http://www.wankelkim.net/rx7/fb/fpr(2).JPG

And as promised the rear suspension pictures

http://www.wankelkim.net/rx7/fb/rearsusp.JPG
http://www.wankelkim.net/rx7/fb/rearsusp(1).JPG
http://www.wankelkim.net/rx7/fb/rearsusp(2).JPG
http://www.wankelkim.net/rx7/fb/rearsusp(3).JPG

Thanks in advance
Kim

Last edited by Kim; 02-10-05 at 02:50 PM.
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Old 02-10-05, 02:48 PM
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After looking at all the pictures (I missed the one with the left side shot last time) It is a Panhard setup. My Bad.

-Trent
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