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Learning how to build Lotus Seven replicas...together!
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PostPosted: Sun Nov 22, 2009 10:50 am 
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Joined: Sun Nov 22, 2009 9:56 am
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Location: Austin, Texas
I have started working on a new project which is using a Honda S2000 running gear in a McSorley 7+4 chassis.
Currently replicating the independent rear suspension adapted to the chassis

I have created a website that you can view my progress at http://www.lambobuilder.com/LS7/index.html

I have built numerous Lamborghinis and thought I would try something different.
My Lamborghini website is http://www.lambobuilder.com/

Actually we had a silver S2000 when they first came out.We also had a teenage son. The S2000 was rolled and disposed of.

The S2000 power train is not from that car. Still have lots of research to do on the front suspension.
Before and after of our S2000
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Dale

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PostPosted: Sun Nov 22, 2009 11:01 am 
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Location: Charleston, WV
Looks like a nice start. Nice donor choice. Hope your son is OK. I've drooled over the S2000 drivetrain for years now. How much does that engine stick up above the top frame rail and how much sticks out below the bottom? Post pics of your uprights and what not when you get to that point I'd love to see what you're working with. I looked at your website and it appears you have a couple frames in the works? A sister project perhaps?

Welcome to the forum.

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PostPosted: Sun Nov 22, 2009 12:21 pm 
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Location: Shawnee, Ks
I'm available for adoption if you need another son. Wow, looks like it is going to be a screamer. Russ


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PostPosted: Sun Nov 22, 2009 2:25 pm 
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The S2000 was wrecked many years ago. The son was not injured beyond his pride. He actually built the chassis when he was attending Wyotech. Pictures with the S2000 in the chassis can be found here http://lambobuilder.com/LS7/chassis/fra ... /index.htm

It may be tall but will address that when we get to that part. No other projects in the work beyond this one.

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PostPosted: Sun Nov 22, 2009 3:58 pm 
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lambobuilder wrote:
The S2000 was wrecked many years ago. The son was not injured beyond his pride. He actually built the chassis when he was attending Wyotech. Pictures with the S2000 in the chassis can be found here http://lambobuilder.com/LS7/chassis/fra ... /index.htm

It may be tall but will address that when we get to that part. No other projects in the work beyond this one.

Yeah I saw those pics earlier, but I was hoping you might have actual measurements of the dimensions I mentioned in my last post. Glad to hear your son was fine. That looks like a boatload of anti-squat (or something along those lines) in the pic of the rear suspension FWIW. Those front lower A arm chassis pivots are lot higher than the rear. I'm not used to seeing that sort of thing, I hope it works well for you. Have you figured out what your wheelbase will be? I'll bet it's a good bit more than the S2000 was.

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PostPosted: Sun Nov 22, 2009 9:14 pm 
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Chetcpo, Have not figured out the wheelbase yet. Still working on the rear. Had to notch the lower suspension to clear the axle. I should have noted that when creating my jig. Will update website later this week.

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PostPosted: Mon Nov 23, 2009 2:11 pm 
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Be sure to check the s2000 forum. Early S2000's had problems such as weak valve spring retainers (they crack from the bottom up) and transmissions that needed the RIGHT oil or they'd break. If they've found cures for these problems, you'll save yourself some grief later.


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PostPosted: Mon Nov 23, 2009 8:50 pm 
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Location: Fort Worth, Texas
jerelw wrote:
Be sure to check the s2000 forum. Early S2000's had problems such as weak valve spring retainers (they crack from the bottom up) and transmissions that needed the RIGHT oil or they'd break. If they've found cures for these problems, you'll save yourself some grief later.


That's QUITE an overstatement!

There were a few early engines that had valve spring retainers that did crack and the solution was to replace the newer version when it was time to adjust the valves. Very few ever had an engine issue after the first few dropped a valve and made everyone aware of the problem. Honda even replaced any with a hint of a problem. But not a transmission in sight that needed the right oil or they'd break.

Once again the earliest 00-01 models had a few trannies that the stacking tolerances totalled more than was wise and some had a hard shifting issue that was fixed under warranty cause it was so obvious. About the only way you'd get one of those is to find one that was wrecked with 1,000 miles or so on the odo.

As far as transmission fluids making a difference you'll find that most of the S2000 fanbois who swear by that are also the tinkerers that can't find anything else to do to the car so they change fluids and swear they feel a difference. I've had one fluid change in 56,000 miles and feel no difference in shifting. I have a friend who just bought a new CR and we were amazed at how my shifter felt just as good as his brand new one. Several of our friends are in the 100,000+ miles range with no fluid changes and no apparent degradation of shifting quality nor any problems. If you do change fluids they do recommend the factory Honda fluid or the GM synchromesh modified fluid as they seem to feel better at the shifter. I used Royal Purple.

They changed the synchros to carbon fiber in '04 which is supposed to make bang shifting easier but at the same time they put a clutch delay valve in so you couldn't bang shift. The quick fix for that is with a dental pick and about 5 minutes to remove the valve.

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PostPosted: Mon Nov 23, 2009 9:55 pm 
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Thanks for the insight. The engine is 2002 but will certainly heed the advice

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PostPosted: Mon Nov 23, 2009 11:18 pm 
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Do you have the 2002 ecu, key and immobilizer module? If not it can be tricky to get running.

If you don't send your ecu to Brian at WCM Ultralite and he can remove the immobilizer from it.

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PostPosted: Tue Nov 24, 2009 1:19 am 
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Location: Etobicoke, ON, Canada
Just a note, but in your illustration you have the camber washer bolt stops drawn incorrectly. They should butt up against the washer on both sides. This is what forces the camber bolt to move.

I like your build, but aren't you concerned about the weight at all? I'm in the process of building a middy BEC using S2000 uprights and differential. I'm using it because it was easy and cheap for me to get...(I suspect the same might be said for you?). I'm mildy concerned about unsprung weight given how heavy the spindle assemblies are. The diff isn't featherly light either. I'm planning on fabricating my own control arms (again mainly because of weight concerns).


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PostPosted: Tue Nov 24, 2009 1:29 am 
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I was kinda wondering the same thing, but I'm not too wise in such regards. I figured maybe the guides were just for positioning, and he's counting on the clamping forces to actually hold it in place.

-dave "i dunno" hempy

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PostPosted: Tue Nov 24, 2009 2:14 am 
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Dave, it's no different than the way any Miata gets aligned.
You do need to make sure that the bolt gets tightened WELL, in the shop the term is "tight as [PooPoo]".

Moti

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PostPosted: Tue Nov 24, 2009 8:57 am 
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you are correct on the camber washer stops. When I was putting the illustration together I wasn't thinking it all the way through. I've corrected the picture on my site.

This is the other chassis that I built from the ground up.

Image
Details can be seen here http://lambobuilder.com/chassis/index.htm

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Dale
http://lambobuilder.com/LS7/
http://lambobuilder.com/


Last edited by lambobuilder on Tue Nov 24, 2009 2:23 pm, edited 1 time in total.

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PostPosted: Tue Nov 24, 2009 2:21 pm 
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Got the rear diff mounted and found I needed to notch the lower support. Latest pictures here http://www.lambobuilder.com/LS7/chassis/suspension.html

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http://lambobuilder.com/LS7/
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