wildejon 7 Posted May 9, 2006 Just wondering what your thoughts on this were. There seem to be a fair threads few with regards to standard 1.6 or 1.9 engines and Mi's too but I couldn't really find anything on the Gti-s engine... Cheers Share this post Link to post Share on other sites
TEKNOPUG 3 Posted May 9, 2006 Just wondering what your thoughts on this were. There seem to be a fair threads few with regards to standard 1.6 or 1.9 engines and Mi's too but I couldn't really find anything on the Gti-s engine...Cheers It's just a mildy tuned 1.9 engine - stick with the 1.9 'box Share this post Link to post Share on other sites
wildejon 7 Posted May 9, 2006 Fair play, any reason for that? I thought I would get better acceleration from the 1.6, but reading a few other topics they dont really appear to be all that different...? Share this post Link to post Share on other sites
TEKNOPUG 3 Posted May 9, 2006 You will get slightly better acceleration at the cost of slightly worse top end. The 8v doesn't rev like the 16v so you don't need a short 'box to keep it on the power. Also, if you do any motorway driving you'll find that the 1.9 'box only gives 20mph/1k in 5th (80mph at 4k) which is pretty short already - the 1.6 'box will be even worse! Share this post Link to post Share on other sites
Robsbc 0 1 Cars Posted May 9, 2006 You will get slightly better acceleration at the cost of slightly worse top end. The 8v doesn't rev like the 16v so you don't need a short 'box to keep it on the power. Also, if you do any motorway driving you'll find that the 1.9 'box only gives 20mph/1k in 5th (80mph at 4k) which is pretty short already - the 1.6 'box will be even worse! Had a 1.9s with a 1.6 g/box which is now mated to my Mi16....Found the gearbox fine in both specs of engine. SBC like the 1.9 gearbox and 1.6 final drive Share this post Link to post Share on other sites
wildejon 7 Posted May 9, 2006 I unfortunately have to drive 25 miles to work on the motorway (complete waste of a 205, I know, its driven properly at the wkend) so I guess the 1.9 makes sense for that reason. How come SBC like the 1.6 final drive? (I'm presuming thats 5th) Is it meant to be used with anything other than petrol saving at higher speed? Cheers! Share this post Link to post Share on other sites
jonD6B 0 Posted May 9, 2006 I unfortunately have to drive 25 miles to work on the motorway (complete waste of a 205, I know, its driven properly at the wkend) so I guess the 1.9 makes sense for that reason. How come SBC like the 1.6 final drive? (I'm presuming thats 5th) Is it meant to be used with anything other than petrol saving at higher speed? Cheers! I should do a bit more searching for a better idea. The final drive, put VERY basically is the gear which determines the ratio or speed of how quickly the other gears will spin. It isn't 5th gear as such. It sounds like you should stick with the 1.9 box. I'm currently running an MI box at 19.9 mph per 1K revs. and it's terrible for motorway driving. Share this post Link to post Share on other sites
wildejon 7 Posted May 9, 2006 Oh, I hadn't thought of that! Makes sense. Mind you, I've been running a 1.6 box for 2 years with my 1.6. I do get sh!te fuel economy on the motorway but I can't complain compared to the economy some ppl with crazy engiens get! I'll give the 1.9 a shot then and swap it over if I'm not happy. Will take some getting used to after the 1.6 one. Share this post Link to post Share on other sites
Ahl 4 Posted May 9, 2006 You'll be happy with the 1.9 box. The shorter ratio gearbox will feel more 'buzzy' for sure, but all that happens is that you end up changing gear more often and you find yourself in too low a gear most of the time, loosing some flexibility. They don't really make the car any faster. The 1.6 and mi16 only have lower ratio gearboxes because they rev higher, and so retain the flexibility. Share this post Link to post Share on other sites
wildejon 7 Posted May 9, 2006 Thats set then Cheers Share this post Link to post Share on other sites
TEKNOPUG 3 Posted May 10, 2006 Had a 1.9s with a 1.6 g/box which is now mated to my Mi16....Found the gearbox fine in both specs of engine. SBC like the 1.9 gearbox and 1.6 final drive That's a fair comment Rob. There isn't really too much difference between the boxes, that was my main point. There is lot's of informantion regarding all the BE3 gears ratio and even spreadsheets which will show you the max speeds with each combination, but I'll let you have a search around to find those! Each box is designed to meet the specific needs of the car and engine they are attached to. For example, the 1.6 is quite a revvy motor, so it has quite short, evenly spaced gears to keep it in the power and promote sporty driving. The 1.9 has a bit more torque and isn't quiter a rev-happy, so it has a slightly longer (although similarly equally space gears for sporty driving) box. The Mi16, although being a 16v with a high rev limit and power in the upper ranges, was fitted to a 405, which is bigger and heavy than a 205 (and designed for a different purpose). So it has short 1st & 2nd gears to get it going from low speed, equally spaced 3rd & 4th for overtaking and a lonngggg 5th for sales-rep m-way cruising. So it's important to tailor the gearing to the car/engine/purpose. Many people find that the Mi16 engine/box isn't suited to a 205 as the first couple of gears are too short (lot's of wheelspin) and the rest are too long. So many people swap to the 1.6 box to keep the engine revving hard in all the gears and imagining that they are Keke Rosberg or some such (you all know who you are ). Personally, my engine is turbocharged so the power is further down the rev range. I use a 1.9 box with a longer final drive. This makes all the gears a little longer whilst keeping the same spacing between gears as before. So I get to keep the engine in the power and on boost longer than with a standard 1.9 box which would want to change up earlier. It also gives me a theoretical top speed of 143mph (although the car goes into meltdown above 135mph! And motorway journeys are a little less of a chore...... When you find all the gear ratio info, you'll notice that a lot of the gears are the same in the boxes, just with a few subtle changes in combination and final drive. Share this post Link to post Share on other sites
Ahl 4 Posted May 10, 2006 So it's important to tailor the gearing to the car/engine/purpose. Many people find that the Mi16 engine/box isn't suited to a 205 as the first couple of gears are too short (lot's of wheelspin) and the rest are too long. So many people swap to the 1.6 box to keep the engine revving hard in all the gears and imagining that they are Keke Rosberg or some such (you all know who you are I'd disagree with that. 1st is a bit shorter, but the rest of the gears are shorter than even the 1.6 gearbox, with the exception of 5th, which is still very slightly shorter than the 1.9 gearbox. It gives the same flexibility as the 1.9 gearbox on the mi16 engine due to it revving so high. The only complaint is usually the drop when you go into 5th, but thats the compromise of needing a cruising gear on a short ratio 5 speed gearbox. Its not *that* bad at all and the whole package is pretty good if you ask me. Share this post Link to post Share on other sites
TEKNOPUG 3 Posted May 10, 2006 OK, many people with the exception of Ahl........ Share this post Link to post Share on other sites
wildejon 7 Posted May 10, 2006 Crikey! I'll do some more reading then and let you know what I end up doing. I reckon I'm going to end up trying both at this rate and seeing which I prefer! Thanks for your comments everyone, much appreciated. Share this post Link to post Share on other sites
saml666 0 Posted May 10, 2006 Crikey! I'll do some more reading then and let you know what I end up doing. I reckon I'm going to end up trying both at this rate and seeing which I prefer! ...yup, trying both is the only way to tell for sure! Ratios are as much about your own driving style as much as anything else. I'm trying to get a BE3 1.6 box for my Mi16 engine but am keeping the old 1.9 one in the wings just in case... Cheers and good luck! Sam Share this post Link to post Share on other sites
SPGTi 2 Posted May 11, 2006 I am running a 1.9 box with MI16 FD. I hit the rev limiter at 105mph in 5th but getting there doesn't take long at all. The car pulls like crazy in every gear and now 5th is a very useable gear not just a motoway cruising gear. The best bit is that on gear changes I loose hardly any revs so it is very easy to stay in the "power band". My Quaife gets a good work out when accelerating out of corners !! Just for info ('box/FD) 1st 2nd 3rd 4th 5th 6th FD 1.6/1.6 3.31 1.88 1.36 1.07 0.87 0 4.06 1.6/1.9 3.31 1.88 1.36 1.07 0.87 0 3.69 1.6/mi16 3.31 1.88 1.36 1.07 0.87 0 4.43 1.9/1.6 2.92 1.85 1.36 1.07 0.87 0 4.06 1.9/1.9 2.92 1.85 1.36 1.07 0.87 0 3.69 1.9/mi16 2.92 1.85 1.36 1.07 0.87 0 4.43 mi16/1.6 2.92 1.85 1.28 0.97 0.76 0 4.06 mi16/1.9 2.92 1.85 1.28 0.97 0.76 0 3.69 mi16/mi16 2.92 1.85 1.28 0.97 0.76 0 4.43 Share this post Link to post Share on other sites
wildejon 7 Posted May 30, 2006 Cool, cheers for that info Share this post Link to post Share on other sites
Robsbc 0 1 Cars Posted May 30, 2006 Good luck with my engine... Share this post Link to post Share on other sites
wildejon 7 Posted May 30, 2006 Cheers I'll look after it mate Share this post Link to post Share on other sites
