Suspension Setups

Suspension, including wheel, tire and brake.
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S15DET
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Re: Suspension Setups

Postby S15DET » 17 Jul 2012 12:14

Is there a way to determine the RC? You can "measure" CG by comparing flat 4-wheel weight to tilted 2-wheel weight in some manner, right, like tilting to car up to, say, 30deg?

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Re: Suspension Setups

Postby HudsonMC » 18 Jul 2012 13:49

S15DET wrote:Is there a way to determine the RC? You can "measure" CG by comparing flat 4-wheel weight to tilted 2-wheel weight in some manner, right, like tilting to car up to, say, 30deg?


Yes, you can measure the difference in weight and then back-calculate and find the CG height that way.

As far as roll center height, the only way I've ever heard of it being measured is by measuring and calculating the heights. There are formulas which make it easy for more common types of suspensions. I've lent my book that contains them out to a friend, so I don't have them handy. To get the whole picture, it takes a detailed model though, as the RC moves around a bit as the suspension moves.

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Dave Patten
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Re: Suspension Setups

Postby Dave Patten » 16 Aug 2012 06:21

One thing that must be considered when comparing body roll between the Alfa and the 510 is the different types of suspension systems on these cars.

Image

The 510’s IRS rear has a great ability to soak up bumps and keeping the tires on the pavement because of its lower unsprung weight. Great for a smooth ride in a street car, but the toe and camber changes as it moves thru the suspension travel are a detriment to the car’s handling when at the limits of adhesion. The solid or live rear axle in Alfa on a smooth surface like most racetracks gives up very little in handling because of its much more limited toe/camber change during suspension movement.

The 510’s MacPherson strut front suspension has limited (negative) camber gain during bump suspension travel because of it design. In fact bump travel as it increases can get to a point where the suspension no longer gains negative camber and will start to induce positive camber. The system is simple in design with a low build cost when compared to the double a-arm suspension as used on the front of the Alfa. The 510 because of the limited negative camber gain needs more roll control to keep proper tire contact with the road when racing. The Alfa with its unequal length double A-arms has not only more negative camber gain but an increasing rate of camber gain as the suspension increases in bump travel.

Back to the picture, the Alfa has what most 510 drivers might consider too much bodyroll to handle well, but when you consider that both the 510’s and the Alfa’s suspension systems are keeping the tires nearly perpendicular to the road surface it is no wonder that the Alfas gave the 510 a run for its money in the handling department.

Because of the type of suspension used on the 510 stiffer springs and larger sway bars (compared to the Alfa) are needed to keep the tires in proper contact with the road, which is what is needed to help generate the most lateral grip in a car.
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Mattndew76
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Re: Suspension Setups

Postby Mattndew76 » 12 Sep 2012 19:54

This is not a datsun but it is a really neat setup.
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butters68
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Re: Suspension Setups

Postby butters68 » 25 Dec 2012 19:35

does anyone know the length of the illumina mr2 insert[ body] ?
i'm looking for my inserts and want to make sure i get the right size.
the inside length of my 280zx strut tube is 14-7/8".and the nut is 5/8" so i got 14-1/4". i would like to go with the adjustable shocks if possible.
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proflex
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Re: Suspension Setups

Postby proflex » 25 Dec 2012 20:34

http://www.tokicoperformanceshocks.com/ ... eries.aspx

viewtopic.php?f=29&t=1067&p=159457&hilit=BZ3038#p159457
That must be just recently, I ordered a set of BZ3038 Tokico Illuminas (280ZX) from Lightning Motorsports beginning of September for $111.40/each with free shipping.


Needs a spacer or shortened strut. :arrow:
viewtopic.php?f=3&t=14383
Then Tokico illuminas 5-way adjustables P/N# BZ3125, which fit 90-95 Toyota MR2, measured 12 inches and 7/8th of an inch. Again make sure you measure the tube with the nut on it because it makes a huge difference

http://forums.hybridz.org/index.php/top ... ll-around/
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butters68
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Re: Suspension Setups

Postby butters68 » 25 Dec 2012 22:59

ok thanks chad,just needed to make sure of the length. 8)
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Re: Suspension Setups

Postby Byron510 » 26 Dec 2012 00:32

proflex wrote:http://www.tokicoperformanceshocks.com/c-6-illumina-series.aspx

http://www.the510realm.com/viewtopic.ph ... 38#p159457
That must be just recently, I ordered a set of BZ3038 Tokico Illuminas (280ZX) from Lightning Motorsports beginning of September for $111.40/each with free shipping.


Needs a spacer or shortened strut. :arrow:
http://www.the510realm.com/viewtopic.php?f=3&t=14383
Then Tokico illuminas 5-way adjustables P/N# BZ3125, which fit 90-95 Toyota MR2, measured 12 inches and 7/8th of an inch. Again make sure you measure the tube with the nut on it because it makes a huge difference

http://forums.hybridz.org/index.php/top ... ll-around/


Thanks for the link Chad,

Tokico shows a PN for the stock 510 front struts...TOHZ3038

Anyone ever purchased their Blue series inserts? Any feedback?

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butters68
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Re: Suspension Setups

Postby butters68 » 26 Dec 2012 13:15

byron i have there blue's on butters , i think they give a very nice ride with my stock springs.
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Re: Suspension Setups

Postby Byron510 » 26 Dec 2012 23:17

butters68 wrote:byron i have there blue's on butters , i think they give a very nice ride with my stock springs.


Mike, did you buy them locally. And we're they a direct fit for the stock 510 struts of??? Length?

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butters68
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Re: Suspension Setups

Postby butters68 » 27 Dec 2012 07:01

byron i got them off of ebay, think it was like $180.00 shipped for front and back. the front needed if i remember right a 7/8" spacer.
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Byron510
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Re: Suspension Setups

Postby Byron510 » 27 Dec 2012 08:28

butters68 wrote:byron i got them off of ebay, think it was like $180.00 shipped for front and back. the front needed if i remember right a 7/8" spacer.


A 7/8" spacer when using the 68 struts on ? Or did you you use the later, longer struts?

Thanks Mike.

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Re: Suspension Setups

Postby MK510 » 27 Dec 2012 11:46

Tokico shock numbers for stock 510 struts are S3001 for longer struts and S3002 for shorter struts.

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butters68
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Re: Suspension Setups

Postby butters68 » 27 Dec 2012 14:14

byron it was my stock 68 struts.if i can get my new set up ready ,i will be selling my setup that i'm running now .
ding ding dong dong all night long long.

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Re: Suspension Setups

Postby Byron510 » 27 Dec 2012 17:01

butters68 wrote:byron it was my stock 68 struts.if i can get my new set up ready ,i will be selling my setup that i'm running now .


If they are 7/8" shorter than the stock 68 struts, woud this part number not be for a 280ZX insert?

Just wondering.

If the set is coming up, sure I'll get in line for that. These are for Old Blue. It's shocks are... shot... to say the least. The front does a really bad wallow at highways speeds - not so good. A bit more of a marshmellow than I really like. I'd replace the rears just to keep them matching.

Thanks Mike, we'll stay in touch. When do you think you'll be onto this program? Send me a PM.

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