EOI: Custom Gemini diff conversion R&D and manufacture
so with this just being a center, whats the estimated price and what would need to be supplied?
got my te gemi for $220
new coupe... project under construction
http://www.ozgemini.com/forums/non-tech ... ight=fazio
new coupe... project under construction
http://www.ozgemini.com/forums/non-tech ... ight=fazio
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Hey all sorry to join the conversation late, I have been looking through all the posts regarding up grading the gemini diff to a stronger item,
I'm curious to know why a cut down VL 5.0 LSD disc brake item is so unpopular??????
I have one am looking into cutting one down for my coupe and switching to a four link rear.
The crummydore diff is strong, common and "cheapish" and there are a few different ratios to suit. There are of course engineering issues, and the cost of cutting down axles and welding on mounts ect ect. But surely this could be all done for under $1000 in including the diff??? with a little bit of home engineering (excluding professional engineering)
eg:
-My diff cost (free) $$maket value $400?
-axles cut and re-splined $200
-weld up gemini suspension mounting points (free)
-fabricate 4 link pick up points (engineering input recomended)
I'm curious to know why a cut down VL 5.0 LSD disc brake item is so unpopular??????
I have one am looking into cutting one down for my coupe and switching to a four link rear.
The crummydore diff is strong, common and "cheapish" and there are a few different ratios to suit. There are of course engineering issues, and the cost of cutting down axles and welding on mounts ect ect. But surely this could be all done for under $1000 in including the diff??? with a little bit of home engineering (excluding professional engineering)
eg:
-My diff cost (free) $$maket value $400?
-axles cut and re-splined $200
-weld up gemini suspension mounting points (free)
-fabricate 4 link pick up points (engineering input recomended)
#Turbocoupe75
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- Supreme Overlord
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lol!!!But surely this could be all done for under $1000 in including the diff???
diff - what ever u paid.. say $400
shorten housing and weld gemini brakets on.. $750
shorten and respline axels $300
tail shaft - $350
4 link kit $800+ or ladar bar kit $500
then u have all the mods tot he car to fit the 4link which would be a heap.. a little work in the ladar bar....
then u need to buy a LSD and ratio that u want...
no way u would do it for a grand
"No thank you, Turkish; I'm sweet enough."
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LOL back, I reckon i could do for close to $1000, I'm not saying it would be easy, there is no reason that allot of the fabrication couldn't be done in the back shed with a little planning and design
diff - what ever u paid.. say $400
-I got my LSD diff for free with disc brakes
shorten housing and weld gemini brakets on.. $750
Free, I have a welder and access to a drop saw
shorten and respline axels $300$200 or free if I do it myself It helps a mate has a mill and dividing head, not sure how much it is to get them heat treated?
tail shaft - $350 why pay someone??, measure cut weld I can do that myself, pay to get it balanced though
4 link kit $800+ or ladar bar kit $500
then u have all the mods tot he car to fit the 4link which would be a heap.. a little work in the ladar bar....
No way im paying $800 for a kit, cut the pickup points and upper links from another car and fabricate suitable mounting points on the underside of the gem.
won't hurt to give it a go!
diff - what ever u paid.. say $400
-I got my LSD diff for free with disc brakes
shorten housing and weld gemini brakets on.. $750
Free, I have a welder and access to a drop saw
shorten and respline axels $300$200 or free if I do it myself It helps a mate has a mill and dividing head, not sure how much it is to get them heat treated?
tail shaft - $350 why pay someone??, measure cut weld I can do that myself, pay to get it balanced though
4 link kit $800+ or ladar bar kit $500
then u have all the mods tot he car to fit the 4link which would be a heap.. a little work in the ladar bar....
No way im paying $800 for a kit, cut the pickup points and upper links from another car and fabricate suitable mounting points on the underside of the gem.
won't hurt to give it a go!
#Turbocoupe75
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Turbocoupe75 wrote:LOL back, I reckon i could do for close to $1000, I'm not saying it would be easy, there is no reason that allot of the fabrication couldn't be done in the back shed with a little planning and design
no eveyone have ability to do so in there back shed
diff - what ever u paid.. say $400
-I got my LSD diff for free with disc brakes
not everyone is goning to get a diff for free
shorten housing and weld gemini brakets on.. $750
Free, I have a welder and access to a drop saw
dodgy... got a jig to make it straight?
shorten and respline axels $300$200 or free if I do it myself It helps a mate has a mill and dividing head, not sure how much it is to get them heat treated?
not everyone has mates with machinery liek that
tail shaft - $350 why pay someone??, measure cut weld I can do that myself, pay to get it balanced though
cos not eveyone has welding abilitys to do so.. and somehtign like a tail shaft i would be paying a pro to weld up, even if i could weld
4 link kit $800+ or ladar bar kit $500
then u have all the mods tot he car to fit the 4link which would be a heap.. a little work in the ladar bar....
No way im paying $800 for a kit, cut the pickup points and upper links from another car and fabricate suitable mounting points on the underside of the gem.
again, dodgy.. cut and shut suspension parts.. awsum....
won't hurt to give it a go!
might hurt when the tailshaft comes apart and tears through the floor
you said
maybe for you its cost effective cos u know peoepl who can do this and that, and u have welding skills etc.. your question was a general "why dont peoelp like shortened commodore diffs cos they can be done under a grand" and my answer was a general reply to that..I'm curious to know why a cut down VL 5.0 LSD disc brake item is so unpopular??????
cant say i would like to have a housing cut and welded up in the back yard with out the use of a jig to make sure its straight...
either way. i doubt u will do it under 1000$... not to mention have it legal. for under 1000$
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anyways, this isnt the thread to be asking about comodor diff conversions.
"No thank you, Turkish; I'm sweet enough."
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No worries, so cost is the reason it's is so unpopular
I was more worried about weight or physical size of the diff or difficulty of obtaining a suitable diff ratio, rather than the cost or difficulty of installing a vl diff.
I was more worried about weight or physical size of the diff or difficulty of obtaining a suitable diff ratio, rather than the cost or difficulty of installing a vl diff.
apologies wrong forum...nuff said, ill just go do it n post some pics!I'm curious to know why a cut down VL 5.0 LSD disc brake item is so unpopular??????
#Turbocoupe75
VL diffs are the same as VN-VS live axle ones. LSD centers are easy to find as are different gear ratios. This was the path i was going to go down - cost is 1800 through McDonalds bro's racing including shortening, fitting and all however...
Some engineers like it, some dont. IF this idea materializes then its alot easier to get it passed off seeing as it bolts in.
Some engineers like it, some dont. IF this idea materializes then its alot easier to get it passed off seeing as it bolts in.
Previously GeminiCoupe/GeminiRollingShell/SCAR3D/Jonnoisac#nt
78 TD Gemini Sedan - R.I.P
81 TE Gemini Sedan
78 TD Gemini Sedan - R.I.P
81 TE Gemini Sedan
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I work in this industry of chassis work and diff work etc.Turbocoupe75 wrote:Hey all sorry to join the conversation late, I have been looking through all the posts regarding up grading the gemini diff to a stronger item,
I'm curious to know why a cut down VL 5.0 LSD disc brake item is so unpopular??????
I have one am looking into cutting one down for my coupe and switching to a four link rear.
The crummydore diff is strong, common and "cheapish" and there are a few different ratios to suit. There are of course engineering issues, and the cost of cutting down axles and welding on mounts ect ect. But surely this could be all done for under $1000 in including the diff??? with a little bit of home engineering (excluding professional engineering)
eg:
-My diff cost (free) $$maket value $400?
-axles cut and re-splined $200
-weld up gemini suspension mounting points (free)
-fabricate 4 link pick up points (engineering input recomended)
You can respline and axle but what heat treating is on the axle to begin with? If it has been case hardened it will need re heat treating...
Your mate may have a mill but does he have a broach to cut the splines? Not a cheap machining tool at that either.
Yes you can cut your diff tubes but i guarantee not in a million years will the cut of a drop saw be accurate enough to just "slap" the ends onto and weld up.
The reason we have engineers in this country to sign stuff of is for people like you who think they can wing it.
Using suspension parts off another car isnt going to work either. Not unless they work in the exact same configuration they came off in. But hey if you dont want to pay $800 for a universal 4 bar kit then off you go. I can tell you know that a polished stainless 4 bar kit with brackets costs $700 COSTS $700 and takes 4 hours to put together. Make 2 a day and it doesnt even cover overheads.
The tailshaft dont even get me started on this....
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WH Caprice daily driver- Tune, Exhaust, auto, stall, diff gears, Valve springs, U/Dirve pulley, OTRCAI 12.7@ 108 MPH
TG- Latest Project plans not sure
WH Caprice daily driver- Tune, Exhaust, auto, stall, diff gears, Valve springs, U/Dirve pulley, OTRCAI 12.7@ 108 MPH
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Turbocoupe75 wrote:No worries, so cost is the reason it's is so unpopular
I was more worried about weight or physical size of the diff or difficulty of obtaining a suitable diff ratio, rather than the cost or difficulty of installing a vl diff.
apologies wrong forum...nuff said, ill just go do it n post some pics!I'm curious to know why a cut down VL 5.0 LSD disc brake item is so unpopular??????
sorry cuz, but i need to reply.
not really the cost.. a conversion will cost u about 2000-3000, which is what peoepl are gonna pay for this thing cuz is having made up (includign stonger tube and axels, disk conversion etc... its more the legality sides of things... most engineers dont want a bar of diff conversions in geminis.. Re: one of my earlyer posts in this thread abou tthe "grey area"
"No thank you, Turkish; I'm sweet enough."
Ok, now that this thread is nice and gummed up with crap, can we please move the posts not relevant to another thread?
The only legit question i saw while browsing through these posts was about pricing - please refer to the bottom of the very first post in this thread. I ouline what I have paid for the various parts of the driveline and an approx of what the LSD centre will cost to be made up.
The only legit question i saw while browsing through these posts was about pricing - please refer to the bottom of the very first post in this thread. I ouline what I have paid for the various parts of the driveline and an approx of what the LSD centre will cost to be made up.
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Last edited by Gemi Coupe on Tue Oct 26, 2010 3:28 pm, edited 1 time in total.