Hi everyone. I already posted this in the General Discussion (sorry for the dbl post) but figured this might be the better place for it.
Has anyone corner weighted their stock 5th gen (preferably base)? I am trying to calculate wheel rates and spring natural frequencies so I can figure out what spring rates to get when I buy new springs. So did anyone who has cornerweighted their car get the stock weight per wheel? If not, does anyone know the weight distribution Front to Rear? Thanks for any help.
Originally posted by Poboy Hi everyone. I already posted this in the General Discussion (sorry for the dbl post) but figured this might be the better place for it.
Has anyone corner weighted their stock 5th gen (preferably base)? I am trying to calculate wheel rates and spring natural frequencies so I can figure out what spring rates to get when I buy new springs. So did anyone who has cornerweighted their car get the stock weight per wheel? If not, does anyone know the weight distribution Front to Rear? Thanks for any help.
ah someone had done this earlier, emial or PM PreludeLC. He has done it.
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-Andrew
'00 Prelude NX'd 13.71@102.83mph (Blown Engine, JDM replaced and sold)
'05 Nissan Altima 2.5S and how.
I corner weighted my 97 SH after the springs had settled a little.
The final weights were:
LF: 1032 lb RF: 965 lb
LR: 628 lb RR: 557 lb
With driver (approx 200 lb at the time).
Can I ask why you are going to so much trouble for a luxury sport coupe?
I don't think your going to see much better performance then you would if you asked around and went with some common sense racing knowledge. No matter what you do with spring rates, it's still gonna be a 3000 lb LUxo/Sport coupe.
Originally posted by Marsh I corner weighted my 97 SH after the springs had settled a little.
The final weights were:
LF: 1032 lb RF: 965 lb
LR: 628 lb RR: 557 lb
With driver (approx 200 lb at the time).
Can I ask why you are going to so much trouble for a luxury sport coupe?
I don't think your going to see much better performance then you would if you asked around and went with some common sense racing knowledge. No matter what you do with spring rates, it's still gonna be a 3000 lb LUxo/Sport coupe.
Thanks man! As for why I'm going through the trouble, it's hard to explain. Mainly I just want to know, figure it out for my own. And this way I'll Know that the spring rates will be the optimal setting (and I'll be able to calculate natural frequencies for any spring rate). As for asking around, while there are definitely people who're trustworthy and knowledgeable, you never really know if their ideas about comfort/performance are the same as yours, or how many different products they tried first, etc. Also, there doesn't seem to be a lot of 5th gen racers out there. I'm trying to avoid buying Teins for example just because they're popular (and I've heard good and bad things about them). This way I'm tuning my suspension from a real starting point, not arbitrarily picking a 'better' setup. It may still be a 3000 lb sport coupe, but hopefully it'll be a mad handling beast of a 3000 lb sport coupe. Well, that was probably way more than you wanted to know .
If anyone has the weight dist. or base sprung weight per wheel info, I'd still like to know, so I can confirm my calculations. Thanks again.
No not really. I'm a mechanical engineering student and designing the suspension my school's 2003 Forumal SAE car. I know extacly what the purpose of the calculation is. What surprises me is that anyone that knows how to do it would wast their time on a car like the Prelude. Besides wich calculating the natural frequency will give you a good base from which to work, but finding the right wheel rates for the right scenario is still something of a black art. If I had a dime for everyone that thought they knew what they were doing in this respect I'd be rich. Oh wait I am rich! It's still going to take a good deal of trial and error. Of course on a race car you build a database from the previous cars (which are usually very similar) and use that data to find the correct setup for the next vehicle. In the Prelude you don't have that data, unless you know someone that races a Prelude. In which case you would have the equipment to find this out for your self and wouldn't be asking the question here.
I'm not trying to insult you or anything. But it seems to be that someone with the knowledge needed to do this could find a project more deserving of the skills. Never the less good luck.
For the record I waste my time with the Prelude because as a student I can no longer afford to replace it. (dispite the fact that I always seem to justify spending a few thousand on it every year to keep it competitive)
Originally posted by Marsh No not really. I'm a mechanical engineering student and designing the suspension my school's 2003 Forumal SAE car. I know extacly what the purpose of the calculation is. What surprises me is that anyone that knows how to do it would wast their time on a car like the Prelude. Besides wich calculating the natural frequency will give you a good base from which to work, but finding the right wheel rates for the right scenario is still something of a black art.
The reason I'm 'wasting my time on a Prelude' is because that's what I have. Even if I was driving a Yugo, I'd want it to handle a well as I could with the money I have. I realize that what I end up with will not be the final answer, but the starting point for trial and error tuning, etc.
Quote:
If I had a dime for everyone that thought they knew what they were doing in this respect I'd be rich. Oh wait I am rich! It's still going to take a good deal of trial and error. Of course on a race car you build a database from the previous cars (which are usually very similar) and use that data to find the correct setup for the next vehicle. In the Prelude you don't have that data, unless you know someone that races a Prelude. In which case you would have the equipment to find this out for your self and wouldn't be asking the question here.
Unfortunately, not many people race the prelude, so that wasn't an option.
Quote:
I'm not trying to insult you or anything. But it seems to be that someone with the knowledge needed to do this could find a project more deserving of the skills. Never the less good luck.
No offense taken. As for a project more deserving, I disagree with the notion that any car isn't worth the effort.
I'll probably be going today to have the sprung weight per wheel done so I can finally get the answers I'm looking for. Thanks for providing your numbers, but I didn't realize they included the driver. Oh well, time to spend some money.
I appreciate the #'s desmat, but the problem is subtracting driver's weight. Since the driver's weight is distributed over the LF and RR, I'd need to know what % goes where. Still, it helps to have a ball park.
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). Do you remember the thread topic by chance so I can search for it?
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