583 replies to this topic

[Niko]

Lol, that Synergy engine in the Jun car is like a $70,000 job.

 

What are MCA running in their WTAC car? An SR or an RB I thought.

[JDWhiteWRX]

 

 

What are MCA running in their WTAC car? An SR or an RB I thought.

 

Their Toyota 86 runs a 3.7 L VQ37 V6 from a Nissan 370Z.

 

https://chromjuwelen...-86-with-a-vq37

[Niko]

In case you're looking for parts.

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[JDWhiteWRX]

I'm currently in Japan looking for parts.







.
Nah just kidding in just looking for fresh powder 😃

[El_Freddo]

Nice. Good opportunity to score some parts on the side

I've heard they've got some cool little 4wd vans among other things!

Cheers

Bennie

[Niko]

http://www.speedhunt...ord-challenger/

[JDWhiteWRX]

Yes I did see that, I'm still in Japan but will take a good look at it when I get back, it's hard to see the detail on my phone.

[JDWhiteWRX]

Sorry there have been no updates but I have been very busy working on my wrx. Here are a few photos of that.

 

 

 

 

 

With regards to the BRZ I have been slowly acquiring some parts and thinking long and hard about how to attack the chassis work. Ben from Benny's Custom Works has been a great help in sourcing some of the suspension parts I needed to get started. So far I have got the complete rear multi-link subframe with control arms and the front x-member. There are a few more pieces too which I need to go down and pick up.

[JDWhiteWRX]

Things are getting underway with the BRZ. I have been designing the rear end which will be a space frame tied into the roll cage but done according to WTAC pro-am rules with the cage following CAMS schedule J. This has taken a lot of research to get to this design I will be using, its about 80% done, the remainder can not be done until I finish making a jig for the factory rear multi-link suspension cradle.

Today I removed some of the floor so I could get some better measurements.





Joel.

[El_Freddo]

Good to see the weight reduction being taken to the extreme! 

 

 

Sorry there have been no updates but I have been very busy working on my wrx. Here are a few photos of that.

 

 

 

 

 

I can relate to this, especially the under the bonnet work! (isn't this why we're all here??).

 

Keep up the good work!

Cheers

Bennie

[JDWhiteWRX]

Work has begun on the rear suspension, I have done my research and I think I have figured out how to do it but there will be some changes made as I go.

It starts with making a welding jig for the rear suspension cradle. The idea is to locate all the suspension arm pivot points in space including the position of the rear diff.



I am using these bits of tube to locate the pivot points which have been cut such that they will slide into a piece of 50 x 2.5mm square box (SHS). The box sections will be cut to create brackets for the rod ends on each control arm. The rest of the frame will be CDS tube.



I hope to build most of it on the bench but at some point it will need to be placed in the rear of the car as it will not be bolt-in to save some more weight. I will use the original 4 bolt points to locate the tube frame in the correct position, however, I will raise it up about 80mm using spacers so the the car is lowered by this amount without affecting the suspension geometry.

Joel.

[Adam]

Yessss wicked

[Niko]

This car is getting cray cray, can't wait to see it on the track.

[JDWhiteWRX]

Some more progress today, I have got the main frame of the jig welded up and test fitted it in the back of the car to make sure that it fits between the frame rails. You may notice the use of washers in the control arm mounts, this is because the rod ends I intend on using are a lot more narrow than the factory rubber bushings.



This is as far as I got today, the frame is welded up and the rear diff mounts are finished.



Joel.

[JDWhiteWRX]

Last night I finished off the diff mounts in the jig.





Control arm pivot locations will be next which are slightly more difficult as I have to attach square to round tube.

Joel.

[JDWhiteWRX]

A little bit more done last night and this afternoon. Started joining bars to the pivot points, I used a step drill on the square tube first to match the outer diameter of the tube that locates the pivot points. This way you get a nice tight fit for welding.



The rear most pivots were a little awkward to reach, I've got to think ahead and make sure I can remove the jig from the frame when its finished and also get good enough access to get a weld on first so nothing moves.

I had to flip it over to get to some of the welds.



The next pivot points moving forward were much easier and access was good so I just attached the bar straight to it.



Final photo is of a car that I am getting ideas from to join the tubular rear cradle to the roll cage.



Joel.

[El_Freddo]

So this jig will serve the purpose of building a tubular rear suspension frame for strength or reduced weight?

 

There's not much of that vehicle left in that last pic.  Cool looking frame that looks like it should just slot in like a glove to the remaining shell.  Then what do they do, reweld the rest of the body back on or use fibreglass panels?  I'm guessing this comes down to the requirements of the class the vehicle will be raced in.

 

Keep up the good work.  Pics are ace.

 

Cheers

Bennie

[Barbbachello]

So this jig will serve the purpose of building a tubular rear suspension frame for strength or reduced weight?

 

There's not much of that vehicle left in that last pic.  Cool looking frame that looks like it should just slot in like a glove to the remaining shell.  Then what do they do, reweld the rest of the body back on or use fibreglass panels?  I'm guessing this comes down to the requirements of the class the vehicle will be raced in.

 

Keep up the good work.  Pics are ace.

 

Cheers

Bennie

Theyd probably cut up the cage and reweld it back in the car or make the front end tubular too

[JDWhiteWRX]

That car is a full tube chassis or space frame as they call it. Basically the tube frame takes all the loads from the suspension and driveline, motor etc. and the body adds nothing structurally, its just there to make the car look like something we can relate to.

For my car I am working with WTAC rules which do not allow a full tubular construction. I am allowed tubular only from the front of the rear wheel arches moving toward the rear. Under no circumstances can I modify the floor pan, engine firewall or front strut towers.

So what I will do is use as much tube as I can within the rules, this will drop considerable weight and give me a very low ride height without any suspension geometry compromises.

[JDWhiteWRX]

Lots of progress today, I have just completed all the pivot locations on the jig.

The last one was a little tricky as I wanted to include a little anti-squat reduction into the design.

It started by making some drilled angle which would move the pivot down and slightly forward.



Then this was simply bolted into the factory location and squared off the table.



Here is a photo of the completed pivot location in its new lower position.



and a couple of photos of the completed pivots. I'm getting better at using the MIG welder, this job has given me a lot of practice.





The final part involves locating the four main subframe attachment points. This is a little tricky as I have to make them removable with bolts otherwise I will not be able to separate the cradle from the jig. More on that later....

Joel.