Mikey Bikey's Scimega

If you have a long-term project and would like to share/document progress, this is for you.

Moderators: scimjim, Roger Pennington, philhoward, Lukeyboy46, erikscimitardemon

User avatar
MikeyBikey
Posts: 6411
Joined: Thu Mar 11, 2010 1:55 pm
Location: Sunny Falmouth. :)

Mikey Bikey's Scimega

Post by MikeyBikey » Tue Sep 15, 2020 4:40 pm

:roll: :roll:

Anyways just got car weighed. With a me sat in,

1200kg overall, 620kg front, 580kg rear so I'm happy with that


Is we sideways yet...

efi_sprintgte
RSSOC Member
Posts: 1865
Joined: Fri Oct 22, 2010 6:24 pm
Location: Sutton, Surrey

Mikey Bikey's Scimega

Post by efi_sprintgte » Tue Sep 15, 2020 5:40 pm

Proves the placement of the LPG tank was spot on 8)


JC

User avatar
MikeyBikey
Posts: 6411
Joined: Thu Mar 11, 2010 1:55 pm
Location: Sunny Falmouth. :)

Mikey Bikey's Scimega

Post by MikeyBikey » Tue Sep 15, 2020 7:36 pm

Yes, I am pleased with that, I must admit.

I've also managed to put a full size 15" spare wheel in where the old fuel tank was. I was going to put the focus fuel tank in but I've changed my mind. As much as a great fit the focus fuel tank is, and its basically perfect - thanks for the idea Phil - I don't need 50 litres odd of petrol capacity combined with 60 litres of lpg so I'm going to put a bespoke aluminium fuel tank where the passenger side rear drug smuggling cubby hole is.

Regarding mass etc. I now realise the solid rear axle is a bit meh. Its distorting the sprung v unsprung mass on relation to front and back. (ie the front has a much smaller unsprung mass compared to the rear.

Regardless, its bleddy great to be progressing on all the other things rather then engine, clutch, gearbox; engine, clutch, gearbox; engine, clutch, gearbox; engine, clutch, gearbox; engine, clutch, gearbox again; engine, clutch, gearbox; engine, clutch, gearbox; engine, clutch, gearbox..

you get the point :roll:


Is we sideways yet...

User avatar
MikeyBikey
Posts: 6411
Joined: Thu Mar 11, 2010 1:55 pm
Location: Sunny Falmouth. :)

Mikey Bikey's Scimega

Post by MikeyBikey » Sat Sep 19, 2020 7:30 am

So one of these small jobs is tweaking the ride height. I've lifted the front 10mm, and dropped the rear 20. But did that in three steps, rear 10, front 10, rear 10. Driving in between to keep an eye on things.

However even though the ride height is now good, the rear handling is diabolical on undulating surfaces. I think having the large lpg tank behind the axle masked this trait somewhat, but it does explain why the handling has been so poor at times around curbs.

So I've done the sprung to unsprung weight on front and back. This is a picture or rear passenger side
20200916_201035.jpg
20200916_201035.jpg (145.99 KiB) Viewed 607 times
Including the wheel, 38kg front, 84kg rear (each corner)

After doing the calcs my front springs appear far to weak so I've ordered a stronger set.

I'm also checking all the rear trailing arms, bushes etc for anything untoward.


Is we sideways yet...

b.c.flat hat
RSSOC Member
Posts: 2383
Joined: Tue Aug 28, 2007 6:29 pm
Location: St. Martins, Oswestry.

Mikey Bikey's Scimega

Post by b.c.flat hat » Sat Sep 19, 2020 8:40 am

350 front, 225 rear ish! Just don't let yer front lower wishbones droop below horizontal, chassis end that is. It morphs from "marvellous!" to "messy!" otherwise.😎



User avatar
MikeyBikey
Posts: 6411
Joined: Thu Mar 11, 2010 1:55 pm
Location: Sunny Falmouth. :)

Mikey Bikey's Scimega

Post by MikeyBikey » Sat Sep 19, 2020 8:51 am

Cheers Brian, agreed with wishbones, hence lifted the front a tad.

I'm dreaming of IRS.....


Is we sideways yet...

User avatar
MikeyBikey
Posts: 6411
Joined: Thu Mar 11, 2010 1:55 pm
Location: Sunny Falmouth. :)

Mikey Bikey's Scimega

Post by MikeyBikey » Tue Sep 22, 2020 8:10 pm

:D :D

Hmmm , which set tonight....
20200922_200740.jpg
20200922_200740.jpg (201.33 KiB) Viewed 514 times


Is we sideways yet...

Bitterend
Posts: 44
Joined: Sat May 22, 2010 12:16 am
Location: N.W. London

Mikey Bikey's Scimega

Post by Bitterend » Thu Sep 24, 2020 11:36 pm

An interesting journey. I am doing my own conversion to a Cosworth BOB. Started ages ago but this year have got on with it because I have had the time.
Thanks Mike for helping me avoid some of the pitfalls. Although my engine has been in and out more times than a cock-in-a-tart.
Just dropped the rear axle. Trying to decide..... IRS (Jag) or keep the Atlas axle and go for a LSD and disks.Can't remember now What disks and callipers did you use? there seems to have been plenty of different ones used by people here.
With regards to the front rear brake ballance, would a load sensing valve not sort out the problem. As the car brakes and the nose dives the rear will lift so the valve would regulate the pressure to the rear.



User avatar
scimjim
RSSOC Member
Posts: 40816
Joined: Sun Oct 01, 2006 10:08 pm
Location: Gloucester

Mikey Bikey's Scimega

Post by scimjim » Fri Sep 25, 2020 7:40 am

Rear axle on your 6a will be a Salisbury 4HA, not Atlas.


Jim King

SECURE DRY STORAGE FOR YOUR SCIMITAR

Current: SE5 (8Ball), 1400 1600 1800 Zetec ST170 powered SS1 (G97), 2.5TD SE5a (diesel 5a), 6 x random other SS1s.
Previous: SE5, 3 x SE5a, 2 x SE6a, 3 x SE6b, GTC, 2.9i GTC, 3 x 1600 SS1, 1300 SS1, Mk1 Ti Sabre, Mk1.5 CVH Sabre, TI SS1 (snotty), 1600 SS1 (C686CCR).
Chief mechanic for: 1400 K series SS1 (Megan3), 1400 CVH EFi SS1 (Grawpy), 1300 SS1 (Number One) & Sarah's coupe.
CURE THE FAULT - NOT THE SYMPTOMS

User avatar
BigBobPilot
RSSOC Member
Posts: 1567
Joined: Mon Aug 06, 2007 8:41 pm
Location: Warwickshire

Mikey Bikey's Scimega

Post by BigBobPilot » Fri Sep 25, 2020 9:09 am

There's not too much wrong with the beam axle when everything is set-up properly. Far easier & cheaper to get the set-up done than spend lot of time & money converting to independent rear, that will still need to be set-up properly anyway.


Ben

SS1 CA18DET race car
Latest owner of V6 coupe SRE 353G
SSSC Champion 2009, driving "Big Bob"
CSCC "Swinging 60s" race series winner in 2011, 2014 & 2015 (Group 2) sharing a Marcos with Iain Daniels

User avatar
MikeyBikey
Posts: 6411
Joined: Thu Mar 11, 2010 1:55 pm
Location: Sunny Falmouth. :)

Mikey Bikey's Scimega

Post by MikeyBikey » Fri Sep 25, 2020 9:36 am

Went with Rover 827 vented coupe disks up front (there are two diameters, I got the larger ones but can't remember the actual size) They are a deep top hat design so actually go over the existing hubs quite neatly, rather than bolt on the back, then you can dissipate some of the heat through the alloy wheel rather than the hub. Wilwood 4 pot calipers.

The Rears are also rover 800, solid disk and caliper. The drum backing plate has been re-enforced and acts as a the mounting for the calipers.

I've used a mondeo balancing valve inline, between front and rear and it seems to be a pretty good balance.
bbv.jpg
bbv.jpg (24.04 KiB) Viewed 384 times

And likewise I've thought about IRS but tbh, I just want to get out and enjoy the car for a year or so.

Supercharge maybe, before IRS but projects for the future


Is we sideways yet...

User avatar
Nick
Posts: 3058
Joined: Tue May 15, 2007 3:38 pm
Location: Redditch

Mikey Bikey's Scimega

Post by Nick » Fri Sep 25, 2020 10:38 am

I'm with Ben. A top engineer once said "a well set up live axle is the next best thing to perfect independent suspension".


Nick

MR2 and Beemer 3 series, currently no Scim!
Six times SSSC Class Winner
Not over the hill, just going up it faster !

Bitterend
Posts: 44
Joined: Sat May 22, 2010 12:16 am
Location: N.W. London

Mikey Bikey's Scimega

Post by Bitterend » Fri Sep 25, 2020 7:53 pm

Hmmmm....
I dont know why I put Atlas when I know it is a Salisbury. I have overhauled dozens of them when I was with Ford.
For the rear disks I was going to make up 2 plates to mount the callipers on and also to retain the bearing, then find some suitable stone guards to finish the job. Stripping the axle at the moment, but have got a particularly stubborn drive flange. My puller wont move it. Pulled the half shaft and off to my mate to borrow his press. My intention is to sort the brakes, put it back in and run it and see how it goes with the wheel/tyre/gearbox combination before pulling it out and replacing the crownwheel and pinion. Will probably fit a LSD at that time.
I will do a drawing of the plate and post it somewhere on here. Not sure where the best place is though.



User avatar
scimjim
RSSOC Member
Posts: 40816
Joined: Sun Oct 01, 2006 10:08 pm
Location: Gloucester

Mikey Bikey's Scimega

Post by scimjim » Fri Sep 25, 2020 8:09 pm

I have the Rover discs on one of my axles (also with LSD) - I imagine some of the sprinters have the adaptor design on file but if you post it here, I’ll move it into the right section 👍


Jim King

SECURE DRY STORAGE FOR YOUR SCIMITAR

Current: SE5 (8Ball), 1400 1600 1800 Zetec ST170 powered SS1 (G97), 2.5TD SE5a (diesel 5a), 6 x random other SS1s.
Previous: SE5, 3 x SE5a, 2 x SE6a, 3 x SE6b, GTC, 2.9i GTC, 3 x 1600 SS1, 1300 SS1, Mk1 Ti Sabre, Mk1.5 CVH Sabre, TI SS1 (snotty), 1600 SS1 (C686CCR).
Chief mechanic for: 1400 K series SS1 (Megan3), 1400 CVH EFi SS1 (Grawpy), 1300 SS1 (Number One) & Sarah's coupe.
CURE THE FAULT - NOT THE SYMPTOMS

Bitterend
Posts: 44
Joined: Sat May 22, 2010 12:16 am
Location: N.W. London

Mikey Bikey's Scimega

Post by Bitterend » Mon Sep 28, 2020 10:29 pm

Hi Mike,
Quick question. Did you have to machine the rover disks or the hubs to get them to fit?
only my hubs measure up at 69.8mm and the disk specification is 64.1mm.
I got the data from Brembo part number 08.5582.10
However the nissan almera disks 08.5443.10 come up closer at 68.09

Just wondered if I am missing something. I can machine out the disks if required, but the nissan ones are 2mm smaller in overall diameter with a larger centering hole. worst way is I have to machine out 1mm on the dia of the centerig hole.
It would be good to have a definative list of parts for evryone to benefit from, so once it is sorted I can put a list up and a method.



Post Reply

Return to “Project Progress”