I totally agree with Mitsuozboi, I first took out just 1 spring and (with the wing on it) it handled the opening/closing almost perfectly, but when you close it the gap on the side with the spring pressure acting on it was very small (closer than stock) and the other side was huge (from inside the trunk I could see light outside)

After some attempts to 'heat' the stock springs to reduce their tension (which worked somewhat) I decided I was still not happy with the way they acted and just removed them. I will put in a hydro-assist lift kit like Mitsuozboi did somewhere down the road.

For now I'm loving my new look and the fitment on the Seibon unit is top notch. Other than not having to reshape or drill a few of the interior holes to get rubber stoppers in, the trunk is totally awesome!

Thanks for all your help guys!

 

just to mention.. I have the Seibon as well.... The fit and weave is flawless but it is a very deep yellow now. Twice as yellow as my seibon hood and I have had the hood much longer. The clear on my trunk has also started cracking. There are probably 100 cracks all over the top of the trunk. each one 1/2" long. Heres pics of the cracks. Just a heads up. You might want to get some extra coats of clear sprayed on if its your DD.

 

Get the Evo RS springs or just the Lancers.

 

Lancers wont work... cause I have a lancer with a evo CF trunk and a evo wing on it and it still flung up fast enouph to break stuff. I have heard the rs works but I dunno... CFtrunks are so much lighter.

 

Here's what doesn't make sense. A Lancer lid is ~18-22lbs, depending. A Seibon lid is ~15lbs and an Evo wing is ~7lbs. As you can see, in theory the stock bars should work well, so perhaps there's something else at play.


I have a CF lid that weighs ~12lbs. I replaced my stock bars with RS bars to no great help. The heating idea sounds interesting.

1. If you don't mind, what exactly do you mean by heating?

2. When you say "worked somewhat," what do mean by "somewhat?" TIA

 

Im not sure what to tell you other then from my experience. Seibon CF trunk with Cerious CF evo wing and lancer oz trunk bars. The trunk flew up fast enouph where I was worried about the trunk ripping off the hinges.


As far as warping,
What you say does make sense and when I installed it I figured I would be fine. But, my only real guess is that the evo wings weight is at the very edge of the trunk.. The tension bars were warping the trunk just in front of the wing. The wing adding weight to the rear of the trunk possibly could have even helped the warping process since the weight wasnt even across the trunk. it was heavy in the rear.

 

I wish I could find my camera, but here is what I tried. Basically I determined the weight of the stock evo trunk + wing was about 37-40 lbs. My new CF trunk + wing weighed in about half, maybe 21-22 lbs.

Looking at the operation of the trunk spring (two metal rods being twisted around each other creating 'spring' force), when the trunk is in the fully upward position, there is almost no twist on the bars (about 25% off 0 tension) just enough to hold the trunk up. When the trunk is fully down it’s at 100% twist. At this level my SWAG (based on how fast and with how much force the stock trunk lid opens) is that the spring is producing about 55-60 lb/ft of force.

Based on this highly speculative assumption I took out my heating torch and raised the trunk to the 50% (half open) position. I put down a whole ton of left over heat shielding blankets and aluminum foil overtop the springs so as to not damage anything else. I heated the springs for about 2 minutes per spring (the idea behind heating is to reduce the tension on the metal by getting it hot and setting it in the new position when it cools down).

After heating what I got was when I pull the latch the trunk pops open with medium force (still more than I would like) but only goes up about 3/4 way and does 2 or 3 oscillations. Basically it would spring open and bounce back and forth in the air and settle at about 1/2 open. You would have to hold it by hand at the fully open position. Also when closed the springs still pushed up the gaps on the trunk to larger than I would like to see.

For these reasons I decided to just remove the springs. I think if someone could figure out a more scientific and accurate way to heat them in the fully downward position to reduce their tension, this could work allot better.

Hope this helps

 

Good info to have mitsuozboi, thanks. Also I think the reason for the warpage is just the total amount of pressure the stock spring puts on the trunk. It only presses on the trunk arms, which are only attached at the very edges. The latch is in the middle of the trunk, so basically when the trunk is latched the springs are pulling on the outside edges while the middle is secured. It's easy to see how warping could occur with too much spring force in this situation.

 

FWIW, the stock lid/wing is ~30lbs. OTOH, the RS lid is ~18lbs. With that in mind, heated RS bars may work in your case, although I'm not sure you'd be inclined to take the $70 gamble (ie. the cost of the RS bars).

Thank you for taking the time to explain this so well.

Just so I understand, are you referring to the gaps between the lid and the fenders when looking down at the trunk?

Too, when did you and Mitsuozboi begin to notice the warping/extra gapping, time-wise? I've had mine for ~2 weeks and it seems fine in that respect, but as you can tell I'm concerned.

 

I just installed in last night so no warping or anything for me and yes I was talking about the gap between the fenders and the carbon trunk side sills. I also had to remove and shim the latch hook (on the bottom of the trunk body) to raise it up to try and get it to fit better/reduce the gap when I had the springs on. Without the springs the shims helped but are not nessisary.

 

Just re weighted my stock trunk lid w/ key tumbler as I dont have that in my new trunk. It was 28 lbs my questionably accurate scale.

 

Trebuchet! most people dont even know what that is, i applaud u for that alliteration.

 

Really?! Wow! I was going by the numbers posted on the site and I appreciate you setting the record straight. If you have the stock wing, could you weigh that, too? I wish I had a scale, as I'd do it, myself.

 

<grin> I used the exact, same reference when I had the lid installed. No one knew what it meant. I sited the movie Gladiator as an example, once I saw the questioning looks. Admittedly, it's not necessarily a word in common usage.

 

its funny because I had to type it into google to make sure I spelled it correctly, then went onto wikipedia to look up the history to see when they were actually used