CTWG60

My looms still doing well one year on thanks KUR2Y, I was one of the first to get one from you on here I think! Thanks. :D

Not if you have a good quality oil leak! Keeps the rust at bay! :lol:

Yeah but it still has expensive tastes. I think he should start making it drink diesel and remove the spark plugs, I think it would be content that way.

:lol: :lol: :rofl: :lol:

You find out how quickly your wobbly thing likes wobble! Being technical about it! 6800*1.7=11,560 with a standard pulley increase the wobbling by some 30-40% and your looking at more than 15000rpm, ouch! If it was kept below 6000rpm then he could of kept it within spec at 13200rpm.

Ooops it's broke already, the charger that is! 62mm = too much!

Kev problem is the 1st and 2nd gear are on the input shaft side are part of the shaft itself and it doesn't matter what diff you throw that won't affect rev drop between gears, and all the input shaft you use although they have different gear ratios VW tend to make the spacing of first and 2nd the same and so the drop in revs between 1st and 2nd is always around 2500rpm. Sucks I know only way round this I can see is a an SQS input shaft and 1st and 2nd gear. Unless there is an input shaft out there I don't know about! You see modern cars are heavy with big wheels so you always end up with a stupid short 1st gear to get it moving and then a short, but not shorten enough 2nd gear so you still end up with a rev drop. Not really looked at 02M boxes yet but I think they are the same. I'll have a poke about later and see if I can find one that maybe of interest. :D All other gears of course are interchangeable and the GXV 02S is the king of short shifting no matter what FD you use! :D

Hopefully this will get made a sticky. It has come to my attention over the last few years that there seems to be a lot of confusion about this particular topic. It happens to be a favorite of mine but I am no expert. I believe I can help with explaining what the deal is with the correct choice of ratios. Of course a lot comes down to driving style and how you want the car to drive. Some people want to hit a certain speed in a certain gear others want to get the most from the engine and some just want the shortest ratio's possible regardless of traction available. Well here goes. Firstly an explanation of a gearbox's job. A gearbox's job is to multiply engine power or energy (torque) so that the engine doesn't stall or bog down and that we get some useful work out of it. We all strive for the best power and torque from our cars but often the gearbox will let you down by not providing enough torque multiplication or too much resulting in wheel spin. Wheel spin however cool is useless in getting from A-B quickly. So the biggest issue we encounter is traction vs acceleration, acceleration is impossible without traction most road tyres in FWD applications (not toyo R888) from research and experience can hold onto about 750lbft x2 as you probably have two front tyres I hope. So we can't really use more than 1500lbft after gear multiplication in dry conditions. So if we are producing 250lbft at the wheels on a dyno and want to achieve maximum acceleration in 2nd gear in the dry without wheel spin we need to multiply 250x6=1500 if our differential has a ratio of 3:1 meaning 1 turn of the wheels = three turns of the diff (or output shaft really) we need to multiply 3x2 to get 6 so we need a 2:1 2nd gear to give us what we are after. So we have established a gear ratio based on a requirement vs available traction. Obviously we can let air out the tyres, run various types of differentials, better compound tyres and front end geometry but the theory remains the same.So if you lose traction in 3rd during full throttle acceleration your gearbox has multiplied the available torque a touch more than the tyres can make use of. OK I wanted to get that off my chest now more on gear ratios. The Differential is the final multiplication of all gears so a first gear of 3 multiplied by a FD of 3 will give you a torque multiplication of 9. But, I hear you ask, how do we know the diff is 3 and first is 3. Well it all comes down to counting teeth. Your gearbox will have an input shaft which does exactly what is says on the tin, it's a shaft running into the gearbox that the engine is connected to via the clutch and inputs it's torque through this shaft. On this shaft are lots cogs or gears which have a certain number of teeth on them, these gears are all fixed to the shaft. Let's say first gear on the input shaft has 10 teeth and the output shaft first gear has 30 teeth, if we divide 30/10 we get 3 so we now know that first gear will multiply the wheel torque by 3. As we slide the gearstick into 1st we are locking the first gear cog on the output shaft to the output shaft itself which then turns the differential gear via the output shaft FD cog or gear, which is actually machined into the output shaft and once again we can do the same calculation on the FD cogs. To be clear the overall effect of torque multiplication may have some people scratching there heads as it all seems a bit weird to be able to make more energy from just cogs. What is actually happening is the effort required by the engine to do a task of work is reduced by the gearbox which has the effect of making it appear to have more energy. It's the long bar and weedy man scenario. :D Basically levers in circles. Ok I'm confusing myself now. :) Just think about it as torque multiplication or task division. OK I'll leave it there for now any comments welcome, if this helps anyone understand let me know. If I'm crap at explaining then also let me know. Next I'll try to explain how to figure out what are the best ratio's for acceleration efficiency. Chris

Of the O2S boxes I know of the GXV and GQL boxes have shorter ratio's again. If the turbo conversion site data is correct I haven't worked them out from the ETKA software. Some balls you have there pulling two boxes apart blind as t what you might find! Thanks as I was very curious about the 02S and 02A compatibility with regards to bell houses. :notworthy: ****************************************************************************************** Gearbox:- GQP Tyre:- Goodyear Eagle F1 195/50 x 15 ------------------------------------------------------------------------------------------- Top Gear gives 22.541 MPH/1000 RPM and a top speed of 139.753 MPH at 6200 RPM Engine speeds in top gear:- 30 MPH = 1331 RPM 40 MPH = 1775 RPM 50 MPH = 2218 RPM 60 MPH = 2662 RPM 70 MPH = 3105 RPM 80 MPH = 3549 RPM 90 MPH = 3993 RPM 100 MPH = 4436 RPM Top Speed in 1 gear = 30.317 MPH And changes into 2 gear at 3723 RPM dropping 2477 RPM Top Speed in 2 gear = 50.483 MPH And changes into 3 gear at 4507 RPM dropping 1693 RPM Top Speed in 3 gear = 69.453 MPH And changes into 4 gear at 4434 RPM dropping 1766 RPM Top Speed in 4 gear = 97.116 MPH And changes into 5 gear at 5044 RPM dropping 1156 RPM Top Speed in 5 gear = 119.372 MPH And changes into 6 gear at 5296 RPM dropping 904 RPM Top Speed in 6 gear = 139.753 MPH ******************************************************************************************

Taking it off on a tangent here but this is as close as I can get to my ideal 6 speed 02S box on 15" wheels. Ingredients are. 1. Custom machined 02S input shaft by SQS! 2. Output gears for 1 & 2 from a CHN VR6 box or similar 3. GQM 02S box as the build box. 4. input and output 4th and 5th from a GXV Which would give you 1st 3.3 2nd 1.94 3rd 1.52 4th 1.27 5th 1.03 6th 0.73 FD 3.39 Gearbox:- O2S theoretical Tyre:- Goodyear Eagle F1 195/50 x 15 ------------------------------------------------------------------------------------------- Top Gear gives 27.262 MPH/1000 RPM and a top speed of 169.022 MPH at 6200 RPM Engine speeds in top gear:- 30 MPH = 1100 RPM 40 MPH = 1467 RPM 50 MPH = 1834 RPM 60 MPH = 2201 RPM 70 MPH = 2568 RPM 80 MPH = 2935 RPM 90 MPH = 3301 RPM 100 MPH = 3668 RPM Top Speed in 1 gear = 37.390 MPH And changes into 2 gear at 3645 RPM dropping 2555 RPM Top Speed in 2 gear = 63.601 MPH And changes into 3 gear at 4858 RPM dropping 1342 RPM Top Speed in 3 gear = 81.175 MPH And changes into 4 gear at 5180 RPM dropping 1020 RPM Top Speed in 4 gear = 97.155 MPH And changes into 5 gear at 5028 RPM dropping 1172 RPM Top Speed in 5 gear = 119.793 MPH And changes into 6 gear at 4394 RPM dropping 1806 RPM Top Speed in 6 gear = 169.022 MPH ****************************************************************************************** Gives me a good launch gear, FT in 2nd with no wheel spin, hard acceleration with little loss of wheel torque in 3rd, 4th and 5th and then a noce 6th to take it easy in. :D Now who has a £1000 to give me to get this little lot sorted! :lol:

Some other interesting options. Gearbox:- O2S GXV with GQM 3.39 Diff Tyre:- Goodyear Eagle F1 195/50 x 15 ------------------------------------------------------------------------------------------- Top Gear gives 23.141 MPH/1000 RPM and a top speed of 143.473 MPH at 6200 RPM Engine speeds in top gear:- 30 MPH = 1296 RPM 40 MPH = 1729 RPM 50 MPH = 2161 RPM 60 MPH = 2593 RPM 70 MPH = 3025 RPM 80 MPH = 3457 RPM 90 MPH = 3889 RPM 100 MPH = 4321 RPM Top Speed in 1 gear = 32.642 MPH And changes into 2 gear at 3723 RPM dropping 2477 RPM Top Speed in 2 gear = 54.355 MPH And changes into 3 gear at 4507 RPM dropping 1693 RPM Top Speed in 3 gear = 74.780 MPH And changes into 4 gear at 4772 RPM dropping 1428 RPM Top Speed in 4 gear = 97.155 MPH And changes into 5 gear at 5028 RPM dropping 1172 RPM Top Speed in 5 gear = 119.793 MPH And changes into 6 gear at 5177 RPM dropping 1023 RPM Top Speed in 6 gear = 143.473 MPH ****************************************************************************************** Gearbox:- GQM st. 3.39 Diff Tyre:- Goodyear Eagle F1 195/50 x 15 ------------------------------------------------------------------------------------------- Top Gear gives 27.262 MPH/1000 RPM and a top speed of 169.022 MPH at 6200 RPM Engine speeds in top gear:- 30 MPH = 1100 RPM 40 MPH = 1467 RPM 50 MPH = 1834 RPM 60 MPH = 2201 RPM 70 MPH = 2568 RPM 80 MPH = 2935 RPM 90 MPH = 3301 RPM 100 MPH = 3668 RPM Top Speed in 1 gear = 32.642 MPH And changes into 2 gear at 3723 RPM dropping 2477 RPM Top Speed in 2 gear = 54.355 MPH And changes into 3 gear at 4152 RPM dropping 2048 RPM Top Speed in 3 gear = 81.175 MPH And changes into 4 gear at 4528 RPM dropping 1672 RPM Top Speed in 4 gear = 111.159 MPH And changes into 5 gear at 4804 RPM dropping 1396 RPM Top Speed in 5 gear = 143.473 MPH And changes into 6 gear at 5263 RPM dropping 937 RPM Top Speed in 6 gear = 169.022 MPH ******************************************************************************************

Did someone mention Gearboxes!! :lol: Gearbox:- GXV+ 0.73 6th Tyre:- Goodyear Eagle F1 195/50 x 15 ------------------------------------------------------------------------------------------- Top Gear gives 23.456 MPH/1000 RPM and a top speed of 145.428 MPH at 6200 RPM Engine speeds in top gear:- 30 MPH = 1279 RPM 40 MPH = 1705 RPM 50 MPH = 2132 RPM 60 MPH = 2558 RPM 70 MPH = 2984 RPM 80 MPH = 3411 RPM 90 MPH = 3837 RPM 100 MPH = 4263 RPM Top Speed in 1 gear = 28.085 MPH And changes into 2 gear at 3723 RPM dropping 2477 RPM Top Speed in 2 gear = 46.768 MPH And changes into 3 gear at 4507 RPM dropping 1693 RPM Top Speed in 3 gear = 64.341 MPH And changes into 4 gear at 4772 RPM dropping 1428 RPM Top Speed in 4 gear = 83.592 MPH And changes into 5 gear at 5028 RPM dropping 1172 RPM Top Speed in 5 gear = 103.070 MPH And changes into 6 gear at 4394 RPM dropping 1806 RPM Top Speed in 6 gear = 145.428 MPH ****************************************************************************************** Gearbox:- GXV Tyre:- Goodyear Eagle F1 195/50 x 15 ------------------------------------------------------------------------------------------- Top Gear gives 19.910 MPH/1000 RPM and a top speed of 123.445 MPH at 6200 RPM Engine speeds in top gear:- 30 MPH = 1507 RPM 40 MPH = 2009 RPM 50 MPH = 2511 RPM 60 MPH = 3013 RPM 70 MPH = 3516 RPM 80 MPH = 4018 RPM 90 MPH = 4520 RPM 100 MPH = 5022 RPM Top Speed in 1 gear = 28.085 MPH And changes into 2 gear at 3723 RPM dropping 2477 RPM Top Speed in 2 gear = 46.768 MPH And changes into 3 gear at 4507 RPM dropping 1693 RPM Top Speed in 3 gear = 64.341 MPH And changes into 4 gear at 4772 RPM dropping 1428 RPM Top Speed in 4 gear = 83.592 MPH And changes into 5 gear at 5028 RPM dropping 1172 RPM Top Speed in 5 gear = 103.070 MPH And changes into 6 gear at 5177 RPM dropping 1023 RPM Top Speed in 6 gear = 123.445 MPH ****************************************************************************************** Best way to fix the high revs in 6th is to fit an 0.73 6th gear about £150 from vw but you'll save that in fuel in no time! I'll dig out part numbers if your bothered. Was thinking of going GXV to reduce losses in wheel toque between gears but 1st would be a bit useless in an FI car! :( On 15" anyway! Any requests??? :lol: :D Looks like it's going to quiet in work today! :clap:

What will they think of next! Tights for metal! :)

It that just paint or has it been powdercoated? :D Thinking of doing my spare but drilling it first for a neuspeed ARB. 8)

Well if I do I won't be buying anymore head bolts. My ARP studs arrived. Just inspected them and worked out I'll be using 15 whole threads of the 17 available in the block instead of 10 with standard stretch bolts and I only have to tighten them to 80lbft how stressless is that! Famous last words. 3 stage recommended so I'm thinking 20,40,60,80 checked twice in sequence at each stage with the special moly paste!! :D I'll never use "stretchy snappy mess with your head bolts" again! :camp:

:D

Yes as I well bloody know! :lol: This is the last time for me though. Promise!

Yeah, M12 head bolts.

With you running standard rods I think the issue will be with the oiljets. If you ran with forged rods.. oh you can't can you, you have your standard rods custom bushed or spaced or something. I think you would be better using diesel bolts or trying the ARP bolts or just getting some more 1H bolts and never taking the head off again! :D

There wasn't any block, injector or dizzy drive gear clearance during your build was there so should be straight forward. Give Impulse a ring linky in my signiture Adrain is a good bloke you won't be disappointed. If there are issues I'm sure he could copy the old block. Or maybe you could find some ARP's to suit?!? :shrug: 1H bolts have the same part no. as Diesel 1.9 bolts!! Are you sure they are stretch bolts? Some one told be recently diesel bolts are non stretch!! Scratch that. Diesel Bolts 068 103 384 A, 1H Bolts 037 103 384 B, but both are M12x115!! :shrug: Don't know what the thread pitch is though!

ARPs are the only cure! I don't think they do 1H!!! :D I know we can have a headbolt amnesty day at that stealth RR Day. Bring your old headbolts and cleanse yourself of the nasty habit!

HBHA = Head Bolt Hoarders Anonymous :)

Hang 'em on fishing wire from a set of old pistons to make wind chimes? :D OOOOoooo, Nice idea! :lol: Maybe I could send them to Rob (dirtytorque and commission him to use his artistic skills and welder to produce me a lovely piece for the wife at Christmas. Kill two birds with one stone there!! :lol: Probably me that would end up dead though! Can't imagine headbolts in any shape or form would be comfortable to remove from ones anus!

Nope I just bought some ARP's to solve my new problem. Need to find a use for these old bolts though. Suggestions on a post card please to... I have a mental health issue and can't throw out old headbolts! POBOX 3RE 1QH

Oh Ian you have got it bad! An unrelenting addiction to g60 engines that is! On my iPhone if this post looks a bit weird. Having a few issues of my own with the new head. Unfunnily enough I had a similiar problem to you with valve closure. Not enough valvee to cam clearance. Hade scratching my head for a day or two no compression on three cylinders whatsoever and a massive 6 bar on cylinder 4! Well I rhnk we will all sleep a bit easier knowing the cause of your issues. So a broken spring on an inlet valve was also screwing with the other cylinder, who could of guessed that one! I now have a head bolt issue on refitting my new head. Two of them felt weird toward the end of the 180 final turn like they went past their yield point so I'm now replacing them for the 2nd time. I now have 60 head bolts in my garage, why I keep them I just don't know. :cuckoo: