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> Talk torsions and springs.
brant
post Mar 24 2025, 02:31 PM
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thats a nice weight...
guessing it is streetable without roll cage and fire system added at that weight.
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worn
post Mar 24 2025, 07:35 PM
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QUOTE(Front yard mechanic @ Mar 21 2025, 02:29 PM) *

I like soft suspension with sway front and rear it’s much easier on my L3 L4

Ohhh! That is the spot that gets me.
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gnomefabtech
post Mar 25 2025, 09:58 AM
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Headed to the shop today to install 125# rear springs and 19mm front torsions if the Craigslist guy who has them actually has them.

I'll report back.
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flxzcat
post Mar 25 2025, 10:49 AM
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QUOTE(brant @ Mar 24 2025, 01:31 PM) *

thats a nice weight...
guessing it is streetable without roll cage and fire system added at that weight.


Brant, Yes to above.

I have yet to add plastic but will be doing so in the next couple of weeks. I expect to get down to 1725lbs via hoods, bumpers, headlight mech's, and roof skin on sub frame. At that point I will start adding weight in bigger brakes and wheels.

Oh, Hey, even the new softer torsion bars and springs will be lighter!
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brant
post Mar 25 2025, 12:35 PM
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Way to go

I got my -6 to about 1810 wet
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gnomefabtech
post Mar 26 2025, 08:49 AM
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I got the rear springs in yesterday. Massive improvement. For starters the 14" 125# springs don't have any free droop so they don't rattle on the perches, and 125# is a pretty good sport street spring rate. The car came with nice Bilsteins that I never knew were nice because the suspension didn't move.

Here's a pic of the old spring vs the new spring and a link to the springs I used.

https://www.summitracing.com/parts/STR-SP14125A

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gnomefabtech
post Mar 26 2025, 08:54 AM
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Also, you guys are talking about 1800# cars. What are you doing that gets then that light? Are we talking no side windows and that level of commitment? My car is pretty sparse and still weighs 2000# wet.
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Superhawk996
post Mar 26 2025, 09:01 AM
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QUOTE(gnomefabtech @ Mar 26 2025, 10:49 AM) *

The car came with nice Bilsteins that I never knew were nice because the suspension didn't move.


Suspension travel is overrated (IMG:style_emoticons/default/av-943.gif)
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sb914
post Mar 26 2025, 09:23 AM
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You have pics of the engine swap.?
I watched a couple videos with the hayabusa swap
WOW !
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gnomefabtech
post Mar 26 2025, 10:01 AM
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I didn't take a lot of photos of the build process, just because that can become a full time job, but I do have a few just as a teaser. I'll actually take real pics of the whole thing soon. It's a really complicated thing lol.

The second photo says a lot I think.

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sb914
post Mar 26 2025, 10:23 AM
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Holy rpm ! Can’t wait to see the whole car and video!!
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gnomefabtech
post Mar 26 2025, 11:45 AM
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yeahmag
post Mar 26 2025, 04:15 PM
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I run extremely high spring rates, but have all teflon and monoball bushings, run Hoosier A7's with PCA LA Autocross, and like to win. Feel free to reach out for a ride in it.
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gnomefabtech
post Mar 26 2025, 05:04 PM
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QUOTE(yeahmag @ Mar 26 2025, 03:15 PM) *

I run extremely high spring rates, but have all teflon and monoball bushings, run Hoosier A7's with PCA LA Autocross, and like to win. Feel free to reach out for a ride in it.


Do you have anything done to stiffen the chassis? I notice a bit of "movement" in mine.

Who makes all the bushings you use? I see the Elephant racing options and they look as good as they are expensive.
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yeahmag
post Mar 28 2025, 04:24 PM
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I have the Mad Dog Motorsports longitudinal, inner rear ear, and front sway bar mount stiffeners. I use all Rebel Racing Teflon bushings on the front and rear suspension along with custom monoballs for things like drop links and camber plates.
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technicalninja
post Mar 28 2025, 06:04 PM
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I just love the murdered out black car look!

Wild drive train!

What transmission are you using?

What is your final drive ratio?

I'd love to hear that puppy at full howl!

(IMG:style_emoticons/default/ninja.gif)
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gnomefabtech
post Mar 30 2025, 10:43 AM
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All that black out look was done by the P.O. but it's kinda grown on me so O'm leaving it.

The drivetrain is a kit I'm developing with some friends where we ditch the bike transmission and adapt to a car trans. We are taking the power off the primary shaft of the bike engine, so it's geared down x.6. This means we can use regular car gearing a clutches and stuff. The other car running this kit is a Miata.

The transmission is currently a $500 craigslist-bought stock 901. Needless to say, I'm very ginger in first gear. I have another trans that has taller gears and I'll put that in soon. The ZD 5th is just a bit too short so I'm going with a flipped H.

I'll post a video. I promise.
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gnomefabtech
post Mar 30 2025, 10:45 AM
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QUOTE(yeahmag @ Mar 28 2025, 03:24 PM) *

I have the Mad Dog Motorsports longitudinal, inner rear ear, and front sway bar mount stiffeners. I use all Rebel Racing Teflon bushings on the front and rear suspension along with custom monoballs for things like drop links and camber plates.



Yeah. I have to arrive at acceptance that I need to beef up the longs. The door gap definitely changes a bit when it's on a lift.

Seems like that Rebel kit wouldn't be that hard to add.
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JamesM
post Mar 30 2025, 06:38 PM
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QUOTE(flxzcat @ Mar 24 2025, 12:22 PM) *

My new to me 914-4 is 1825lbs weighed last week on Longacre scales and a 44%-56% balance (I like adding lightness)

Somehow, I got talked into 21mm hollow bars up front and 250lb coils in back.

The car is way too stiff on the street and I consider myself a hard-core racer canyon carver type.

I will soon be changing to 19mm front and 180lb rear.



Still to much.
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