T3 front swaybar sr20 and JBC crossmember

Suspension, including wheel, tire and brake.
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cartel
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T3 front swaybar sr20 and JBC crossmember

Post by cartel » 26 Jun 2020 22:36

T3 has a sr20 front sump swaybar now


Anyone tried it and with jbc crossmember?
Mike Gibson
Datsun: 71 dime; 73 Z ; GT3 240
Other: 65 + 67 Mustang ; 03 murcie

sixstring4as
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Re: T3 front swaybar sr20 and JBC crossmember

Post by sixstring4as » 15 Oct 2020 14:28

I do I have the JBC V3. The swaybar isn't mounted yet as I have to still weld the mounts, but I can probably answer your questions.

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cartel
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Re: T3 front swaybar sr20 and JBC crossmember

Post by cartel » 18 Oct 2020 11:21

ive already bought it and its installed- norm has his installed and driving see funwithmonkeys thread for feedback
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JLsKA
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Re: T3 front swaybar sr20 and JBC crossmember

Post by JLsKA » 25 Dec 2020 21:25

Are you referring to this one: https://technotoytuning.com/nissan/510/ ... waybar-510
I had bought a front sway bar on ebay for my KA swap but it won't fit unless I grind down the old series McKinney cross member.
For that reason, I'm considering buying the new T3 bar but was curious about the design... are there performance trade-offs?

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JordanTr
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Re: T3 front swaybar sr20 and JBC crossmember

Post by JordanTr » 26 Dec 2020 08:16

Yep that’s the one Funwithmonkeys has. To be comparable to a 1” solid bar in the stock location, the front mounted bar needs to be quite a bit larger. Something like 1.375 tubular or 1.25” solid.

I had to drop my 1” sway bar when I installed the JBC stuff and repositioned the engine so I am interested in building some blade style bars that are comparable in stiffness to what I had...
'72 2 door KA project | S14 Silvia RB25DET | S14 RB26DETT (sold) | '90 Audi 90Q20V (sold)

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cartel
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Re: T3 front swaybar sr20 and JBC crossmember

Post by cartel » 26 Dec 2020 11:30

well jordan i have 2 here that you can copy the blade design off-- speedway makes quite a few "bars" and also some splined ends- this was a good starting point and better than "nothing" literally.. the solid mounting plates that T3 makes are nice and i believe would work with a larger bar- it would be nice if they make a larger bar for those of us with 300# front springs but thats not yet - and i have enough other things to do on these so messing around with fabricating swaybars isnt a priority yet -
Mike Gibson
Datsun: 71 dime; 73 Z ; GT3 240
Other: 65 + 67 Mustang ; 03 murcie

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funwithmonkeys
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Re: T3 front swaybar sr20 and JBC crossmember

Post by funwithmonkeys » 26 Dec 2020 11:33

I can confirm what Jordan said. The bar fits very well. Is easy to install and works well. It just needs to be bigger. I have had it out quite a bit now and on my car at least it is not stiff enough. A 1.25 solid bar in that location would probably be in the sweet spot. I'm going to look at the speedway bars soon.
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icehouse
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Re: T3 front swaybar sr20 and JBC crossmember

Post by icehouse » 26 Dec 2020 18:27

Standard T3 product IMO......
"People don't like it when shit doesn't match their rule of thumb." Sam

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Dave Patten
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Re: T3 front swaybar sr20 and JBC crossmember

Post by Dave Patten » 07 Jan 2021 06:35

With the TC rod to sway bar clearance being an issue on extremely lowered cars, FutoFab looked into making a similar forward mounted sway bar.

What we found was when you double the length of the arms, you need to increase the torsional strength of bar by roughly 4 times.

To match torsional strength of our 1 1/8" sway bar, the forward mounted sway bar diameter needed to be over 1 3/4".

Drawing from T3's online info, assumptions and my own vehicle measurements (all very non-scientific) my calculations put the T3 bar as being equivalent to a stock position bar with a diameter between 5/8" to 3/4".

Here is a link to a handy sway bar torsional strength calculator.
http://www.gtsparkplugs.com/Sway-Bar-Calculator.html
Dave Patten
http://www.FutoFab.com
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cartel
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Re: T3 front swaybar sr20 and JBC crossmember

Post by cartel » 07 Jan 2021 15:35

speedway has their own calculator as for arm length and thickness-- i would tend to believe what their ratings are-- my real race car has a speedway hollow 1.25" and i think its 3/16"? id have to check - it also has arms that are at least 15" long as the swaybar is mounted behind the cylinder head ..

im pretty sure that a 1.25" od bar will get to the stiffness required based on the arm length -

either way i wasnt able to figure out 100% if the futofab bar works on the JBC crossmember - and no one could seem to give me the answer.
Mike Gibson
Datsun: 71 dime; 73 Z ; GT3 240
Other: 65 + 67 Mustang ; 03 murcie

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icehouse
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Re: T3 front swaybar sr20 and JBC crossmember

Post by icehouse » 08 Jan 2021 07:09

futofab bar does not work.
"People don't like it when shit doesn't match their rule of thumb." Sam

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