RX8 gearbox into 5a

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
CarlosVanDango
Posts: 193
Joined: Wed Jan 02, 2019 7:37 pm
Location: Rotherham

RX8 gearbox into 5a

Post by CarlosVanDango » Sun May 03, 2020 6:56 pm

scimjim wrote:
Sun May 03, 2020 5:53 pm
Might have to look at the Mazda flywheel tonight.
they are more like an auto flexplate - i wanted to use one for mine they bolt to the rotary crank with 2 bolts and don't look like they have much mass to them
i had a look at some pictures and thought sod that :lol:



efi_sprintgte
RSSOC Member
Posts: 1846
Joined: Fri Oct 22, 2010 6:24 pm
Location: Sutton, Surrey

RX8 gearbox into 5a

Post by efi_sprintgte » Sun May 03, 2020 6:57 pm

scimjim wrote:
Sun May 03, 2020 6:55 pm
I went back to KISS principles and drilled a hole in it to take an SE5 engine mount but didn’t take a pic :D
That was going to be my plan :lol:


JC

User avatar
philhoward
RSSOC Member
Posts: 27891
Joined: Tue Aug 29, 2006 5:41 pm
Location: Staffs, UK
Contact:

RX8 gearbox into 5a

Post by philhoward » Sun May 03, 2020 8:29 pm

I’ve got a gearbox mount consisting of an M10 bolt sandwiching some rubber doughnuts and washers. Seems to be doing the job.

Unlike the snazzy poly mounting washers that broke up into 10mm chunks as soon as any pressure was applied to it - like tightening the bolt..


Phil Howard
Scimitarweb Forum Admin
SS1 1600 Rooster Turbo; Sabre Mk1.5, Sabre Mk2
SS1 Racer
Previous: SE5/5a/SS1 No.1/SS1 Rooster/SS1 1800Ti/SE5a 24 Valve
http://www.ss1turbo.com
Never try and argue with an idiot. They drag you down to their level, then beat you based on experience.

User avatar
CarlosVanDango
Posts: 193
Joined: Wed Jan 02, 2019 7:37 pm
Location: Rotherham

RX8 gearbox into 5a

Post by CarlosVanDango » Mon May 04, 2020 7:46 pm

but this is a better shot of mine sat in situ -the plywood packer is 1"
IMG_9178.JPG
IMG_9178.JPG (218.53 KiB) Viewed 1153 times
plan C now is to make a cradle picking up of the 2 larger lower studs that i have removed, i'm going to get some bolts that bolt the cradle into the threads and the cross member should just clear the heads

for the rubbers i'm looking at something simple like land rover ones



User avatar
scimjim
RSSOC Member
Posts: 40772
Joined: Sun Oct 01, 2006 10:08 pm
Location: Gloucester

RX8 gearbox into 5a

Post by scimjim » Mon May 04, 2020 7:49 pm

Have you checked the output shaft angle versus axle angle? Just from measurements, I make it a bit less than 1” but that’s only theoretical. The SE5 engine mount I’ve mocked up is about 1” though.


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

efi_sprintgte
RSSOC Member
Posts: 1846
Joined: Fri Oct 22, 2010 6:24 pm
Location: Sutton, Surrey

RX8 gearbox into 5a

Post by efi_sprintgte » Mon May 04, 2020 8:00 pm

scimjim wrote:
Mon May 04, 2020 7:49 pm
Have you checked the output shaft angle versus axle angle? Just from measurements, I make it a bit less than 1” but that’s only theoretical. The SE5 engine mount I’ve mocked up is about 1” though.
Could always space that crossmember down from the chassis a few mm.


JC

User avatar
CarlosVanDango
Posts: 193
Joined: Wed Jan 02, 2019 7:37 pm
Location: Rotherham

RX8 gearbox into 5a

Post by CarlosVanDango » Mon May 04, 2020 8:03 pm

scimjim wrote:
Mon May 04, 2020 7:49 pm
Have you checked the output shaft angle versus axle angle? Just from measurements, I make it a bit less than 1” but that’s only theoretical. The SE5 engine mount I’ve mocked up is about 1” though.
i measured the height of my old output shaft of the scimitar box (mine was O/D not sure if that makes a difference?) i'm matching it to that



User avatar
CarlosVanDango
Posts: 193
Joined: Wed Jan 02, 2019 7:37 pm
Location: Rotherham

RX8 gearbox into 5a

Post by CarlosVanDango » Mon May 04, 2020 8:04 pm

efi_sprintgte wrote:
Mon May 04, 2020 8:00 pm
scimjim wrote:
Mon May 04, 2020 7:49 pm
Have you checked the output shaft angle versus axle angle? Just from measurements, I make it a bit less than 1” but that’s only theoretical. The SE5 engine mount I’ve mocked up is about 1” though.
Could always space that crossmember down from the chassis a few mm.
also could cut away a bit of the cross member where it would foul :idea:



User avatar
CarlosVanDango
Posts: 193
Joined: Wed Jan 02, 2019 7:37 pm
Location: Rotherham

RX8 gearbox into 5a

Post by CarlosVanDango » Mon May 04, 2020 8:37 pm

IMG_9180[1].JPG
IMG_9180[1].JPG (205.91 KiB) Viewed 1138 times
this was the mount i was thinking of - it'll be tight but they should just squeeze in....... hopefully :lol:

its a L/H defender mount part no ANR3201
the l/h and the r/h are different sizes so i would just get 2x l/h ones



User avatar
CarlosVanDango
Posts: 193
Joined: Wed Jan 02, 2019 7:37 pm
Location: Rotherham

RX8 gearbox into 5a

Post by CarlosVanDango » Mon May 04, 2020 8:47 pm

just been out and tried it - my scimitar is still on the wheels so it was tight to get a decent picture but it will fit
IMG_9181[1].JPG
IMG_9181[1].JPG (233.41 KiB) Viewed 1132 times
this will be how it fits and one opposing the other side

i've just ordered 2 new ones as this one is a used one and it's got slight wear in - good enough to save for a land rover but not up to scimitar standards :lol:



User avatar
GavinR
RSSOC Member
Posts: 575
Joined: Wed Dec 01, 2010 11:31 pm
Location: Bristol

RX8 gearbox into 5a

Post by GavinR » Mon May 04, 2020 11:38 pm

efi_sprintgte wrote:
Mon May 04, 2020 8:00 pm
scimjim wrote:
Mon May 04, 2020 7:49 pm
Have you checked the output shaft angle versus axle angle? Just from measurements, I make it a bit less than 1” but that’s only theoretical. The SE5 engine mount I’ve mocked up is about 1” though.
Could always space that crossmember down from the chassis a few mm.
Or try a Capri cross member which is already lowered
It should be wide enough to reach the chassis rails - I can measure one if needed

e.g. https://www.ebay.co.uk/itm/Capri-Gearbo ... 2248420755


GavinR
RSSOC Member 3513
1971 SE5a
1970 SE5 Project

User avatar
CarlosVanDango
Posts: 193
Joined: Wed Jan 02, 2019 7:37 pm
Location: Rotherham

RX8 gearbox into 5a

Post by CarlosVanDango » Sun May 10, 2020 10:26 am

i've got my design drawn up (in my head) for my mount - i've took the 2 studs out of bottom mount, chopped them down and welded an M16/24mm nut over them to convert them to bolts, i will swap them for bolts but at the moment i'm unsure of the thread size

i'm making a 'u' shaped bracket that cradles the box using the lower mount holes and rests on top of my land rover mounts - i'll also tie it in one side to the other higher up mount for a bit of added strength

i'll weld 2 mounting bosses to my original scimitar cross member so to dismantle i can just undo the 2 nuts from underneath and 4 scimitar cross member bolts

ive also been looking into the clutch - i plan to use the RX8 slave cylinder i've found out the thread is M10x1 so i'll get a pipe made up that goes from the scimitar master cylinder to it

i've also found that to do this you need a .700 master cylinder, not sure what mine is (i've read it should be .625 standard) but it looks old so i'll get a new one to be sure the output thread on the new one is 3/8 unf but i think the scimitar standard is 7/16 unf



User avatar
scimjim
RSSOC Member
Posts: 40772
Joined: Sun Oct 01, 2006 10:08 pm
Location: Gloucester

RX8 gearbox into 5a

Post by scimjim » Sun May 10, 2020 4:36 pm

Just done some measuring and there’s no way it will fit an Essex with the standard flywheel and clutch. The bellhousing and input shaft are far too short.
51220352-FFCE-4924-92BF-F2D73593BFEE.jpeg
51220352-FFCE-4924-92BF-F2D73593BFEE.jpeg (358.74 KiB) Viewed 985 times


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

efi_sprintgte
RSSOC Member
Posts: 1846
Joined: Fri Oct 22, 2010 6:24 pm
Location: Sutton, Surrey

RX8 gearbox into 5a

Post by efi_sprintgte » Sun May 10, 2020 4:56 pm

scimjim wrote:
Sun May 10, 2020 4:36 pm
Just done some measuring and there’s no way it will fit an Essex with the standard flywheel and clutch. The bellhousing and input shaft are far too short.
I came to the same conclusion


JC

User avatar
philhoward
RSSOC Member
Posts: 27891
Joined: Tue Aug 29, 2006 5:41 pm
Location: Staffs, UK
Contact:

RX8 gearbox into 5a

Post by philhoward » Sun May 10, 2020 6:15 pm

So what’s the solution from the guy(s) peddling them on Facebook? Block them?


Phil Howard
Scimitarweb Forum Admin
SS1 1600 Rooster Turbo; Sabre Mk1.5, Sabre Mk2
SS1 Racer
Previous: SE5/5a/SS1 No.1/SS1 Rooster/SS1 1800Ti/SE5a 24 Valve
http://www.ss1turbo.com
Never try and argue with an idiot. They drag you down to their level, then beat you based on experience.

Post Reply

Return to “Project Progress”