205wrc 16 Posted December 20, 2006 Hi has anybody on here tried the combination of a 1.6 Gti engine fitted to a diesel gearbox. The reason I'm asking is that I've been given a diesel box for free, and was considering fitting it over Xmas. I did have a 1.6 box with an MI 16 final drive fitted about 18 months ago but the planet gears exploded on a road rally, and exited the box via the dizzy cap !!. I have read that the close ratio box for the 1.6 engine is the diesel box with a 1.6 final drive, but what is the complete diesel box like - without swapping anything over. I still have the 4:4 CWP, and the standard 1.6 CWP in cardboard boxes if a swap with the diesel one is required - I was just thinking about saving time !!! Cheers Aled Share this post Link to post Share on other sites
Anthony 1,003 Posted December 20, 2006 I'd think that it would be awful and waaaayy too long - 1.6's on 1.9 'boxes (still alot shorter than a derv) are bad enough. Share this post Link to post Share on other sites
205wrc 16 Posted December 20, 2006 The Ratio's I've found are : Diesel 1st 3.308 2nd 1.882 3rd 1.280 4th 0.969 5th 0.757 CWP 3.471 1.6 Close Ratio 1st 3.308 2nd 1.882 3rd 1.280 4th 0.969 5th 0.757 CWP 4.063 Standard 1.6 GTi 1st 3.251 2nd 1.850 3rd 1.360 4th 1.069 5th 0.865 CWP 4.063 Share this post Link to post Share on other sites
Anthony 1,003 Posted December 20, 2006 It's the final drive that's the killer (not quite sure why that's called a 1.6 close ratio box either, as the gearing is wider spaced than a standard 1.6 box ) Share this post Link to post Share on other sites
pug_ham 245 3 Cars Posted December 21, 2006 It would be horrendous, the car would be painfully slow & nothing like a GTi at all. I've got the equivalent of the 1.6 close ratio box on my 1.9 GTi now (mines from a 405 SRi) & fifth gear is to long for that to pull to the limiter without a major long flat straight. Its good on the motroway but with my box on a 1.6 it'd only work in the first three gears & that would be the end of progress at GTi pace. Fifth would be an absolute nightmare. Graham. Share this post Link to post Share on other sites
pugpete1108 62 1 Cars Posted December 21, 2006 It would be horrendous, the car would be painfully slow & nothing like a GTi at all. I've got the equivalent of the 1.6 close ratio box on my 1.9 GTi now (mines from a 405 SRi) & fifth gear is to long for that to pull to the limiter without a major long flat straight. Its good on the motroway but with my box on a 1.6 it'd only work in the first three gears & that would be the end of progress at GTi pace. Fifth would be an absolute nightmare. Graham. i would have to dissagree ,unless i havent got the close ratio one, i had this combo on my gti and found that when i changed the box for a 1.6gti one and didn't find much difference apart from the long gears , it also still got up to 120 . nippy of the start and good on the motorway i would have kept it but it got quite a bad oil leak.i think its still in the garage actually Share this post Link to post Share on other sites
pug_ham 245 3 Cars Posted December 21, 2006 i would have to dissagree ,unless i havent got the close ratio one, i had this combo on my gti and found that when i changed the box for a 1.6gti one and didn't find much difference apart from the long gears , it also still got up to 120 . I had this same gearbox (405SRi / 1.6 GTi c/r) on mine as a 1.6 before I swapped to the 1.9 engine & yes, whilst it was OK especially on the motorway for cruising, it struggled quite a bit when it got to a hill in 5th. On fast A & B roads it just about worked as 4th gear(same as 1.9 4th) is a nice halfway house between the standard 1.6 box 4th & 5th but the drop between 3rd & 4th slowed progress a bit when really go ing for it due to the lack of comparative torque oon a 1.6. My 1.9 starts to slow pulling much over 6k in fifth (which is near 130mph), it does still pull but not as quick as I'd like. I only ran the car like this for a few months but I wouldn't fit it to a 1.6 again. Graham. Share this post Link to post Share on other sites
