Lower cost Bilstein option! - Page 3 - LotusTalk - The Lotus Cars Community
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post #41 of 176 (permalink) Old 02-02-2013, 06:19 PM Thread Starter
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Originally Posted by dalefield View Post
Yeah...I think you're in the right neighborhood. probably the most usefull info at this point is the perch height relative to the loaded spring length. That info should make the first cut a little easier. I'm eager to see what you put together.
Yes great info. I can almost set ride height without putting the car on the ground! I will probably get the ride height set where I like it and then do the final fine tuning on scales. the car was previosly corner weighted by the previous owner. wish I had that information as the car is very nuetral with no understeer. Just wish it didn't ride like a track only car on these crappy Texas roads.

1989 Lotus Esprit
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post #42 of 176 (permalink) Old 02-02-2013, 09:15 PM
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I have done something similar with my 83 Esprit, only I used QA1 shocks (adj rebound). I utilized the stock upper spring perches in the frame front and rear. For the front it was pretty much mandatory I do this or otherwise I would have needed to do some cutting to clearance the the springs to do a true coil-over. For the 1985 and up cars this isn't necessary.

On the rear you dont need to use the stock upper spring perch but I did so because the rubber bushes that were supplied with the shock were pounded out pretty quick by taking the spring load directly. I might have gotten away with using polyurethane but it was easy enough to make some adapters to use the stock upper spring perch.

I used 2.5" I.D. (Hypercoil) springs and have 225# (8" length) front and 225# rear (10" length). I feel the rears are a bit soft and I will probably try some 250#.

Jeff
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post #43 of 176 (permalink) Old 02-03-2013, 10:10 AM Thread Starter
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Originally Posted by speedmerchant View Post
I have done something similar with my 83 Esprit, only I used QA1 shocks (adj rebound). I utilized the stock upper spring perches in the frame front and rear. For the front it was pretty much mandatory I do this or otherwise I would have needed to do some cutting to clearance the the springs to do a true coil-over. For the 1985 and up cars this isn't necessary.

On the rear you dont need to use the stock upper spring perch but I did so because the rubber bushes that were supplied with the shock were pounded out pretty quick by taking the spring load directly. I might have gotten away with using polyurethane but it was easy enough to make some adapters to use the stock upper spring perch.

I used 2.5" I.D. (Hypercoil) springs and have 225# (8" length) front and 225# rear (10" length). I feel the rears are a bit soft and I will probably try some 250#.

Jeff
Thank you for the info. I will be using the stock upper perches as well. I don't have the stock springs or shocks as my car had GAZ coilovers when I bought it. I can tell from looking that the Gaz setup is using the stock upper parts. It does sound like you did pretty much the same exact thing.

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post #44 of 176 (permalink) Old 02-04-2013, 11:51 AM Thread Starter
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The rear Bilstein shock has a larger size sleeve hole in the bottom mount to fit a C4 Corvette. So I bought these Poly bushings to make the bottom hole the correct size for an Esprit.

Prothane 19 920 Shock Mount Bushings 2 PC Straight Hat w Sleeve Bilstein 12mm ID | eBay

1989 Lotus Esprit
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post #45 of 176 (permalink) Old 02-16-2013, 10:28 AM Thread Starter
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Update:

I dropped the rear shocks off with a machinest and they are maching the groove for the snap ring. I have ordered the fron shocks and waiting for them to arrive. I also found this interesting ad on Ebay. While this setup is not for an Esprit, the components are very similar. This shoud give you an idea of the Lotus Tax rate!

Bilstein coilover Shock Spring Strut Kit Front Rear Pontiac GXP Saturn Sky | eBay

1989 Lotus Esprit
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post #46 of 176 (permalink) Old 03-15-2013, 12:03 PM
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Lantana.. Any updates? Installed? If so coments on ride harshness, etc., etc.?

Will these fit a 1994 S4?
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post #47 of 176 (permalink) Old 05-13-2013, 08:52 AM
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Any updates??? I'm also working on something similar... Any details will be much appreciated!

Thanks!
JG
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post #48 of 176 (permalink) Old 05-13-2013, 09:11 AM
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Lantana:
Are you replacing the Gaz shocks because you could not get a decent ride out of them? Or was there some other reason you were not happy with the Gaz setup? I have a used set of front & rear Gaz shocks for an Esprit I bought off of Ebay but I have never fitted them to the car.

Steven DuChene
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1988 Lotus Esprit Turbo w/SE bodywork and burnt pistons
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post #49 of 176 (permalink) Old 05-17-2013, 09:05 AM
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left rear is leaking a bit.. need solution!
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post #50 of 176 (permalink) Old 06-24-2013, 10:00 AM
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Hey LantanaTX- any updates on this project? I am quite curious to see how it all turned out and if it would be worthwhile to go your route?
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post #51 of 176 (permalink) Old 06-24-2013, 12:00 PM
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Originally Posted by jfitz981 View Post
Hey LantanaTX- any updates on this project? I am quite curious to see how it all turned out and if it would be worthwhile to go your route?
He hasn't posted since February so not sure how likely to see a response.
Certainly sounded like an interesting project (along with his Coyote V8 in an Esprit)

Eddie B
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post #52 of 176 (permalink) Old 07-02-2013, 11:52 AM
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I bought the Esprit that Lantana was planning to convert.Great guy and a pretty good Esprit too.
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post #53 of 176 (permalink) Old 07-25-2013, 04:52 AM
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Late bump for Joebula. Did you also grab Lantana's suspension pieces with the sale? If so...any plans to attempt an install?

Cheers,

Scott
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post #54 of 176 (permalink) Old 08-10-2013, 06:51 PM
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Still looking it all over,really can't believe it!The suspension definitely needs attention..way too low.Yeah I'm going down Lantana's path for sure though. I'm waiting for a slight cool down to start on it.I'm in Phoenix..yeah it's hot.I'll keep it posted for sure though.
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post #55 of 176 (permalink) Old 08-14-2013, 02:53 PM
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Looking forward to it.

Cheers.
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post #56 of 176 (permalink) Old 12-11-2013, 10:49 PM
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post #57 of 176 (permalink) Old 12-12-2013, 07:24 AM
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200-500 lbf/in??

As in somewhere in that range? Or as in 200 in front and 500 in rear?

That's a big range... also this would be a large difference front to rear.

Just adding stiffer springs in the rear will not "fix" the lack of sway bar in the rear! It will just make the balance of front to rear grip change and cause the rear to slide much too easy. I have 300lbf/in front and 350lbf/in rear and I have to dial the rear compression and rebound down a couple clicks in the rear to keep the car from spinning on the track.

A 500 lbf/in rear spring on the Esprit is too much spring for the chassis.

Travis
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post #58 of 176 (permalink) Old 12-12-2013, 07:59 PM
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Travis,
I'm talking about rear springs.
I found a pair which tested 200lbs if compressed 1 inch and 500 lbs at 2 inches.
I bought them second hand as "200# springs".
I knew they are progressive, but I didn't have idea that the second number is so high.

By any chance, do you know what is the spec for testing progressive springs? 1" and 2" or 1" and 3" of compression?

Would you recommend trying 175/450 or 175/350 instead?
My objective is to get a tight street car, no tracking.

What rate would you recommend for the front (with 17mm ARB)?

Thank you

Last edited by MRDANGERUS; 12-15-2013 at 10:09 AM.
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post #59 of 176 (permalink) Old 12-14-2013, 07:00 PM
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seems like a lot of effort when you can buy some AVO's here:

https://www.merlinmotorsport.co.uk/p...rs-ph604-ph604

I got em on all 4 corners of my s4s and they work great..PH745 and PH746
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Last edited by wohlmeyer; 12-14-2013 at 07:08 PM.
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post #60 of 176 (permalink) Old 12-16-2013, 06:47 AM
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I have not heard good reviews on those... :/

I'm gonna need something that can handle 400lbs springs in all 4 corners. Can they?

JG
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