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post #81 of 178 (permalink) Old 07-02-2014, 08:11 AM
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Hi,

Can anyone please confirm if this front KONI (PN: 8040 1092) shocks can be used for 91 Esprit SE using the stock(OE) spring? Any info will be greatly appreciated! Thanks

JR
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post #82 of 178 (permalink) Old 07-31-2014, 06:38 AM
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Any updates on the Koni / Fiero shocks installation/performance/fitment?
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post #83 of 178 (permalink) Old 08-06-2014, 08:38 AM
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To eliminate any ambiguity, the original OE-s should be tested on the dyno to verify/compare the rates.

The "looks" and previous applications do not guarantee similarity, it is just a pure speculation.

Ideally, shock/spring pairs should be tested together to get the "football" graph.
The force of the spring helps resist bump and and promotes rebound.

The key to a balanced set up is:
front and rear spring/shock combos (including anti-sway bar, shock ratios and geo factors), should be tuned in such manner that each end of the car will roll to the same angle, (angle at which each suspension system would roll to if it were independent and not attached to each other by means of the chassis).
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post #84 of 178 (permalink) Old 08-11-2014, 11:59 AM
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Quote:
Originally Posted by lotusespritman View Post
Hi,

Can anyone please confirm if this front KONI (PN: 8040 1092) shocks can be used for 91 Esprit SE using the stock(OE) spring? Any info will be greatly appreciated! Thanks

JR
Could you please tell me how did you come up w/this particular PN?
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post #85 of 178 (permalink) Old 08-11-2014, 02:33 PM
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The info came from previous page.
Anyway, I had confirmation from MyEspritGT that it could fit but it involves a lot of modifications. So why bother... I`ve just installed the OE front shocks from SJ in UK.
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post #86 of 178 (permalink) Old 02-28-2015, 08:50 AM
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The solution is: buy shocks with adjustable perch, front and rear.
Like these GAZmatic shocks.

I just got a pair of custom built adjustable (14 settings from 75 lbs to 600 lbs max), rear shocks with spherical bearings and adjustable perches from GAZmatic.

GAZ guys know their stuff! They are easy to work with and they know what suppose to go on your car!

Just give them model and a year of your car and that's it. They'll do their magic from there.

Here is the tech info: Gaz Shocks Products | GAZ Shock Absorbers | GAZ GHA Suspension kits | GAZ Gold Suspension kits | Top Mounts | Camber Adjuster Plates
and
how to contact them: [email protected] and [email protected]



PS. They've rebuilt my "old" 14 click adjustables for 28 GBP a piece! Quick turn around.

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post #87 of 178 (permalink) Old 02-28-2015, 12:05 PM
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In my opinion:

First, get your custom tailored Gaz shocks and see how much adjustment they give you, calculate pre-load and the desired ride height

and then,

get a genuine Eibach springs from the eBay (if on sale) or Amazon. Don't pay more than $99 a piece, sales happen every week.
It is much easier to replace rear springs (1 hour/per) than the front.

$$: You do the math...

Pick your springs using OE ratings below and your rim/tire width/size
as a guide:

OE LOTUS SPRINGS:

85/86/87/(and 88?) Turbo Esprit Wiki - Esprit.TechnicalData



88 Federal & non-SE 89: (17% anti-dive geometry),
Front: Rate– 22.8 N/mm / 130 Lb/in, Free Length–369mm (14.5”), Static Length– 203mm (10”), 585# preload, ride hgt 170mm
Total with ARB in the corner = 270 lbs/in; ARB rate=0 in the straight line motion
Rear: Rate– 27.5 N/mm / 157 Lb/in, Free Length–334mm (13.15”), Static Length– 205.7mm (8”), 808# preload, ride hgt 170mm
ARB: 17.5 mm dia. front anti-sway bar, confirmed! Rate: 140 lbs/in

89+ SE (22% pro-dive geometry)
Front: Rate– 29.1 N/mm /166 Lb/in, Free Length–372mm (14.6”), Static Length– 219mm (8.62”), 992# preload, ride hgt 190mm
Total with ARB in the corner = 306lbs/in, ARB rate=0 in the straight line motion
Rear: Rate– 27.5 N/mm / 157 Lb/in, Free Length–347mm (13.7”), Static Length– 218mm (8.6”), 800# preload, ride hgt 170mm
ARB: 17.5 mm dia. front anti-sway bar Rate: 140 lbs/in

1990 X180R
Front: Rate- 40.3 N/mm /230 lb/in
Total with ARB in the corner = 370* lb/in; ARB rate=0 in the straight line motion
Rear: Rate- 31.0 N/mm 177 lb/in
ARB: 17.5* mm dia. front anti-sway bar Rate: 140 lbs/in OR 15 mm * ? To be verified

S4
Front: Rate – 36 N/mm / 205 Lb/in
Total with ARB in the corner = 290 lbs/in; ARB rate=0 in the straight line motion
Rear: Rate – 39 N/mm / 225 Lb/in
ARB: 15 mm dia, Rate: 85 lbs/in

S4s
Front: Rate – 41 N/mm / 234 Lb/in, Free Length - N/A, Static Length– 214mm (8.43”) (From Jeremy Walton’s book “The official story”)
Total with ARB in the corner = 319 lbs/in; ARB rate=0 in the straight line motion
Rear: Rate – 45 N/mm / 257 Lb/in, Free Length - N/A, Static Length– 227mm (8.93”)
15 mm dia. front anti-sway bar, Rate: 85 lbs/in

The front damper platform height for each of these measurements is 59mm. The rear platform height is 115mm. The extended/compressed length for the front is 12in./10in., and the rear is 16in./12in.

Sport 300
Front: Rate – 43.2 N/mm / 280 Lb/mm
Total with ARB in the corner = 365 lb/in; ARB rate=0 in the straight line motion
Rear: Rate – 48.8 N/mm / 320 Lb/in
ARB: 15 mm dia, Rate: 85 lbs/in


Tech tips: http://lotusespritworld.com/EGuides/Chassis.html

.

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post #88 of 178 (permalink) Old 02-28-2015, 12:37 PM
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I put SPAX on mine a year or so ago with OEM springs in back and Eibach up front. Handle and drive terrific!

Kenny; Dallas Tx
==============================
1995 Lexus SC300 - SOLD
1990 Nissan 300ZX - SOLD
1990 Nissan 300ZX Twin Turbo - SOLD
1996 Porsche 911 Cab - SOLD
1989 Porsche 928 S4 - SOLD
1994 Lotus Esprit S4
Test pipe, Ramspott & Brandt center exit exhaust, 2002 center exhaust valance, Alunox performance exhaust manifold, Spax coilovers with Eibach front springs, Elise steering wheel
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post #89 of 178 (permalink) Old 03-01-2015, 11:27 AM
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post #90 of 178 (permalink) Old 03-01-2015, 12:28 PM
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Quote:
Originally Posted by MRDANGERUS View Post
You have S4? how much for Spaxs?
Cannot find the receipt right now though it is probably in the garage which is freezing, I try and dig up later.

Bought them from JAE

Kenny; Dallas Tx
==============================
1995 Lexus SC300 - SOLD
1990 Nissan 300ZX - SOLD
1990 Nissan 300ZX Twin Turbo - SOLD
1996 Porsche 911 Cab - SOLD
1989 Porsche 928 S4 - SOLD
1994 Lotus Esprit S4
Test pipe, Ramspott & Brandt center exit exhaust, 2002 center exhaust valance, Alunox performance exhaust manifold, Spax coilovers with Eibach front springs, Elise steering wheel
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post #91 of 178 (permalink) Old 03-01-2015, 01:16 PM
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did anyone try the new suspension set from Nitron? The model NTCLO029 kit?
Surely looks interesting. I would prefer a very firm road set, and this seems to be somewhat like that. And I am free of modifying the Bilstein/Eibach Lotac set, as it rides too high. I've spoken to a friend here, and he rides a similar car like me (1990 SE) and bought the Lotac kit, and it's too soft and not responsive enough and is too high. No adjustment and ballast could counterbalance and remedy that. So he also wants a better suspension instead of the Lotac combo.
Btw. I don't want comfort, only roadholdning. So if I can Loose some comfort and gain even better roadholdning, I'm all in for that. I don't suffer from fatigue or pain from riding a non-comfortable car.
And I might add that i am using V8 AWI Wheels.

Otherwise I'll speak to Öhlins, as I have a very good experience with their products. Expensive but exceptional quality.

Cheers,
Redfox.
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post #92 of 178 (permalink) Old 03-03-2015, 07:34 AM
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FYI:

OE tire sizes:

88 Esprit, Lotus Design OZ Ruote 7-spoke
Frt: 195/60, 7J x 15 +23.3mm track:1529 mm (60.0”)
RR: 235/60, 8J x 15 - 20.3* negative! track: 1553 mm (61.2”)
See: http://www.automobile-catalog.com/ma...vens/1988.html

89 –non SE, Lotus Design OZ Ruote 7-spoke
Frt: 195/60, 7J x 15, +23.3
RR: 235/60, 8J x 15, +30.0
See: http://www.automobile-catalog.com/ma...vens/1989.html

5/89 to 93’ SE, Lotus Design OZ Ruote 7-spoke
Frt: 215/50, 7J x 15 +23.3
RR: 245/50, 8.5J x 16 +30.0
Seehttp: http://www.automobile-catalog.com/ma...vens/1990.html

Chassis and start-point for the “Eagle” Esprit SE chassis
From 3/4/89 for SE, then a couple of month laterfor the different variants at the following chassis numbers:
SE (264 BHP) SCCFC20A 1KHF65000
GMP4 (225-228 BHP) SCC08291 0KHF62728
DOM (UK) Turbo (215 BHP) SCC08291 OKHD13587
DOM (UK) N/A (172 BHP) SCC08591 2KHD13582


93’ Sport-300, OZ Racing Futura Modular 5-spoke w/o cntr cap
245/45 8.5J x 16 +23.3
315/35 10.5J x 17 +30.0
see: http://www.automobile-catalog.com/ma...vens/1990.html

93-1/2 SE, OZ Revolution 5-spoke
215/50 7J x 16 +23.3
245/50 8.5J x 17 +30.0

http://www.automobile-catalog.com/au...ns%2F1989.html

94 to 95-1/2 S4, and USA S4s, Lotus Design OZ Racing 5-spoke
235/40 8.5J x17 +23.3
285/35 10J x 18 +30.0
http://www.automobile-catalog.com/ma...vens/1990.html

95 to 95-1/2 USA S4s (optional), OZ Racing Futura Modular 5-spoke
215/40, 7J X 17 +23.3
245/45 8.5J x 17 +30.0
http://www.automobile-catalog.com/au...ns%2F1989.html

95’ to 96’nonUSA S4s, OZ Racing Futura Modular 5-spoke
215/40, 8.5J x 17 +19.0
245/45 10J x 18 +17.0

96’ to 98’ V8, Lotus Design AWI 6-spoke
235/40, 8.5J x 17 +19.0
285/35 10J x 18 +17.0

96 to 98 V8 (optional), OZ Racing Futura Modular 5-spoke
235/40, 8.5J x 17 +19.0
285/35 10J x 18 +17.0

99 to 01V8, OZ Racing Saturn Plus 6-spoke
235/40 8.5J x 17 +19.0
285/35 10J x 18 +17.0

99’ Sport 350, Lotus Design OZ Racing Crono Magnesio 5-spoke
235/40 8.5J x 17 N/A
295/35 10J x 18 N/A

02 to 04 V8, OZ Racing Nova 16-spoke
235/40 8.5J x 17 +19.0
295/35 10J x 18 +17.0

02 to 04 V8, OZ Racing Nova 16-spoke
235/40 8.5J x 17 +19.0
285/35 10J x 18 +17.0

Early Stevens Esprit's front wheel wells changed through the years. Early ones, including the '88, had smaller wheel wells.
Non-USA S4 and S4s got larger wheel wells, and 17x8.5 wheels with +19mm offset and 235/40 rubber.
The USA models got smaller 17x7 with +23.3mm offset and 215/40 rubber.
Then, in mid-1995 the molds were commonized and all markets got the larger wheel wells.

Turn the front wheels to full lock on an early, small housing USA S4s, and the clearance between the outer edge of the tire, and the rear inside of the fender wall is a scant 8-10mm.
So if you're drooling over some of the big tires used on Euro S4/ S4s, or mid-1995 onward USA S4s and all V8s, you better carefully check-out the clearances in the front wheel well first.
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post #93 of 178 (permalink) Old 03-03-2015, 09:01 AM
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didn't the Sport350 run 295 and nit 285 on the rears?

Kind regards,
Jacques.
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post #94 of 178 (permalink) Old 03-03-2015, 09:52 AM
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Yes the Sport 350 was specified with 295/35-18 Pirelli PZeros on 18x10" rear wheels.

Travis
Vulcan Grey Esprit 89 SE

My Lotus Project Photo Collection
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post #95 of 178 (permalink) Old 03-03-2015, 09:30 PM
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post #96 of 178 (permalink) Old 03-10-2015, 05:03 AM
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Another alternative?

https://www.thelotusforums.com/shop/...uspension.html


Kenny; Dallas Tx
==============================
1995 Lexus SC300 - SOLD
1990 Nissan 300ZX - SOLD
1990 Nissan 300ZX Twin Turbo - SOLD
1996 Porsche 911 Cab - SOLD
1989 Porsche 928 S4 - SOLD
1994 Lotus Esprit S4
Test pipe, Ramspott & Brandt center exit exhaust, 2002 center exhaust valance, Alunox performance exhaust manifold, Spax coilovers with Eibach front springs, Elise steering wheel
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post #97 of 178 (permalink) Old 03-10-2015, 08:08 PM
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post #98 of 178 (permalink) Old 03-14-2015, 08:26 AM
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All dampers are not equal…

When choosing a damper, you should always attempt to match the damper to your spring choice, not the other way round. Some dampers such as Koni and Bilstein are easily revalve-able, others not so much. A re-valve-able damper means that you can send it off to a specialist and have it valved exactly for your requirements, which is no doubt about it, the best way to go.

If this isn’t an option, then the next best thing is to search for adjustable dampers (pricey, Ouch!)

When checking these dyno plots, there are a few things you want to be on the look out for besides checking they match the rest of your setup.
Shape You will typically have three shapes of force/velocity curves.

Digressive.
As stated before, you really want to be looking for a digressive type curve where damper force reduces as the piston velocity increases; this is the best of both worlds as you get firm body control and a good ride.

Linear
A lot of JDM dampers have linear damping, which if used purely on track is not necessarily bad, however in order to get the low speed damping required to control body motion, the high speed damping force goes through the roof and causes an incredibly crashy ride bumpy roads. Good handling, crap ride.

Progressive
One to steer well clear of is any dyno plot with a progressive curve, i.e. one where force increases as piston speed increases. This is just bad in every way; you’ll have poor control over body motion and a crap ride too, worst of both worlds.
Adjust-ability
Adjustable dampers aren’t a necessity at all if you’ve specced everything correctly.

Linear progression
Check that the force curve for each adjustment is a good progression on from the one before it. Good brands will have somewhat linear steps between each adjustment; cheaper ones can tend to be all over the place, with 2 clicks making a massive change at one point and 8 clicks making almost no difference at another. Some brands can even have adjustments going the wrong way, with some full stiff settings being softer than full soft!

The various adjustment traces should also ideally follow a similar shape curve, beware of any that start out progressive and go digressive as they’ll be a nightmare to ever get performing correctly.

Rebound/compression isolation
Most adjustables on the market are rebound adjustable only, so check that adjustments made to the rebound have no effect on the compression damping. If it does affect compression, make sure it is a mirror of the effect on the rebound curve.
When considering purchasing a set of dampers, always ask the dealer/manufacturer for the dyno chart for each one that you are buying, any reputable manufacturer will provide these as they will dyno each individual damper to check its performance. If they don’t/won’t/can’t provide these then you should be questioning why not, you as the buyer want proof that the items you are buying are matched in performance!

Once you’ve found some suitable dampers, and the dealer/manufacturer can provide the individual dyno results for each one, you can be pretty much assured that you’re going to get some good quality equipment.
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post #99 of 178 (permalink) Old 03-23-2015, 09:56 PM
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My front shocks arrived today, PN# GP8-2144
21-click adjustment, spherical bearings, 2.5" ID adjustable perches.
Required spring length = 7.25"+(corner weight/desired spring rate)
L=7.25"+(720/spr rate) [round it up in full inch increments]

Very good quality and price.

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post #100 of 178 (permalink) Old 04-18-2015, 06:10 AM
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Rear suspension finished!

Eibach springs ($160, Amazon),
shocks(190 GBP, GAZmatic,UK),
Lotus radius arm bushes, LOTAC05754 ($60 GBP, Lotus shop),
Upper seats (rubber?) ($40, JAE)
Coil spring thrust roller bearings ($46, eBay),
new hub bearings ($90, eBay),
lateral links ($600, eBay), masking tape protects the powder coating during adjustments.
elbow grease (precious, mine),LOL.
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