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| Blooze Own: An F355 Six Speed N* Build Thread (Page 94/126) |
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355Fiero
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FEB 11, 07:16 PM
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Incredible work Blooz;
Really nice to see everything coming together after so much time and effort. Look forward to seeing it sitting on the ground under tension.
Cheers
Don
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Bloozberry
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FEB 11, 07:29 PM
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| quote | Originally posted by Yarmouth Fiero:
Did you already make plans to move your battery to a new location? |
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The battery will be relocated to the front compartment since there will be lots of room up there, and to help redistribute some weight, but I haven't made any solid plans yet.
| quote | Originally posted by Steven Snyder:
Proma Stars are twin-tube shocks. You can't run twin tubes upside down or sideways. |
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Well thanks for busting my bubble. Where were you before I forked out $400 for these puppies? Hunh? Hunh? It's interesting that none of the literature that came with them even remotely suggests that there's a top or a bottom and that there's a correct orientation for them. I'll have to look more into this but it is starting to make sense why all of the horizontal shock systems I've seen use a remote reservoir. A quick Google scan indicates that that particular style is called a DeCarbon shock and uses a floating piston between the nitrogen and the oil in a reservoir. Why does this suddenly sound really expensive? What is the effect of using a twin tube horizontally?
| quote | Originally posted by Will:
Are you planning to triangulate the rocker arm mounts? |
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I don't think so, though I could possibly incorporate a couple 1" x 1" rectangular braces for additional rigidity if required. Some may find the appearance of the bell crank mounts to be under-designed, but the photos can be deceptive regarding the scale of the pieces involved. The effective moment arm of the bell crank on the lower mount is only about 6.5". I believe it's stout enough having a full 2" x 3" x 1/8" cross section with the 3" dimension oriented parallel to the expected forces. Likewise, the effective moment arm of the bell crank on the upper mount is only about 3" long and is resisted by a 1.5" x 3" x 1/8" wall tubing with the 3" dimension again oriented the same way. It would take some pretty heavy duty forces to bend either one, or to break them from their bases.
Will, I'm still curious to see your design and how you surmounted many of these challenges. If you're not willing to show them to the general public (as you've stated in the past), then I can PM you an email address.
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Zac88GT
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FEB 11, 08:47 PM
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| quote | Originally posted by Steven Snyder:
Proma Stars are twin-tube shocks. They are valved for drag racing so they weren't really ideal for your application anyway.
FYI there are no other common types of automotive dampers besides mono and twin-tube. Twin-tube is the most common in mass production. |
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According to QA1 the promastar can be mounted in any orientation. A guy in this thread phoned them. QA1 also says "Used in drag racing, street performance, autocross, road race and street rod applications, Proma Star shocks are the best for hard-core performance." They're not just for drag racing. Keep up the great work Blooze, I wish I could stay this motivated with my project.[This message has been edited by Zac88GT (edited 02-11-2014).]
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Bloozberry
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FEB 11, 09:10 PM
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| quote | Originally posted by Zac88GT:
According to QA1 the promastar can be mounted in any orientation. |
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Excellent find there Zac!  I was just pricing some DeCarbon style and some emulsion shocks and nearly fell off my seat. The prices average US$1300, which for me would run close to $1800 delivered  That`s not counting the new springs I`d surely need to buy as well.
Feeling quite depressed about it all given the likelihood of finding some alternate shocks with the same travel range was small, I headed out to the shop and tested my shocks by hand. I cycled them upside-down, sideways, and right-side-up about 15 times each way and there was no discernible difference. They slid in and out with just as much pressure no matter what the orientation, and there were absolutely no audible bubbles or swishing sounds coming from them either. I know that's not very scientific, but it gave me a better sense that mounting orientation isn't critical with these. Whew!
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wftb
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FEB 11, 10:55 PM
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i have run my proma stars upside down for a year now with no ill effects .everything i read from QA-1 said they can be mounted any direction .i dont think there is a better shock for the money .the adjustability is great and they are a good looking shock to boot .i have read some criticism because they are not gas filled but a little research shows that gas filled shocks are cheaper because it is very time consuming to design a shock that can use oil alone . cant wait to see everything welded up on your chassis . [This message has been edited by wftb (edited 02-11-2014).]
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Steven Snyder
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FEB 11, 11:16 PM
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I stand corrected. The Summit Racing catalog lists them as having twintube construction, but apparently they are not! Sorry for the alarm! Apparently Proma Stars are gas charged monotube dampers with a separator piston, so they can be used in any orientation.
Worst case you would have had to fork out ~$300 each for some Bilstein ASN shocks. Good monotubes aren't expensive, so it's no big deal.[This message has been edited by Steven Snyder (edited 02-11-2014).]
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Bloozberry
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FEB 12, 07:05 AM
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No probs there Steven... I feel better now. 
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Yarmouth Fiero
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FEB 12, 07:06 AM
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We all feel better now Blooz. 
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Will
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FEB 12, 10:54 AM
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wftb
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FEB 12, 01:06 PM
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QA-1 coil overs are not gas charged shocks .I did a lot of research before i bought mine .If you look at all of the info on their website and in the catalogue , there is no mention of gas charging .
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