GolfGTIforum.co.uk
Model specific boards => Golf mk3 => Topic started by: Godzilla on 07 March 2013, 09:08
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Since owning my Golf MK3 20vt everything is going very well......But!! On hard acceleration in 1st and 2nd the front wheels will just spin thus resulting in poor 0-60 times. I went out and bought some Toyo T1R's tyres as these are a soft compound and thought they may help, I was wrong!
I have heard about the slip diff thing but they are very expensive. Any others ideas on how to keep my car from leaving heap loads of smoke from the tyres as soon as she comes on boost?!
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better driving skills is the only non mechanical way (manually do what tcs does on most car's...limit the power delivery by coming of the pedal) :tongue:
other wise it's lsd time (and the expense)
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Buy an 8v :whistle:
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What's the power delivery curve like on the map as well?
Pull away in 3rd gear. :rolleyes:
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Thanks people!
As for an 8v, think I will give that a miss :grin: I have had a few 8v's and MPG on my 20vt is not that much worse yet shed loads faster, would recommend this conversion any day.
Power curve is fine, nice gradual climb to 2,100RPM then it goes almost vertical till 6,800RPM :grin:
Torque steer is a handful, good forearm workout though!
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You'll find your best 0-60 time by launching in second.
Also slipping the clutch will stop will spin, keeping it at bite. I don't recommend that though.
But a standard mk3 box was never designed with that much bhp in mind. So yes it's time for a LSD
Toyo t1r's are good if you drive a 8v you need something like the toyo R888. Keep the t1r for wet weather.
Grip ain't cheap so its time to spend I'm afraid.
Don't forget road temps are low too so will improve slightly when the climate warms.
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got a wavetrac diff in mine and there was noticeable lack of wheel spin after fitting.
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Buy an 8v :whistle:
My 8v wheel spins through 1st and 2nd, I do have a tractor ratios in the box though :grin:
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Got a remap that limits torque in 1st and 2nd.
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Gearbox mods are what a lot of people forget.
What gearbox do you have? Best combo that I've worked out is probably a mk3 16v box with a vr6 FD and an LSD. :wink:
Standard gearbox was designed for a revvy 16v with low torque around 4k. Not 200+ ftlbs at around 2.5k. Nothing will really help apart from short shifting 1st and 2nd become almost useless.
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Gearbox mods are what a lot of people forget.
What gearbox do you have? Best combo that I've worked out is probably a mk3 16v box with a vr6 FD and an LSD. :wink:
Whats the benefits of using a vr6 fd? More top speed low revs?
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The VR final drive makes the gears longer so yes slightly higher overall speed
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i pretty much skip first there is absolutely no point in going above 2k rpm in first quickly into second partial throttle until after 3k then foot down and if it does start to spin just lifting off for a fraction of a second is usually enough, you can make any car spin if you treat the throttle as a switch progressive throttle is the key, also if you are trying your launches at your local drag strip :wink: launch in second but dont just side step the clutch at 4k as you will break something :grin:
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Stop driving like a nob...
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:laugh:
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Gearbox mods are what a lot of people forget.
What gearbox do you have? Best combo that I've worked out is probably a mk3 16v box with a vr6 FD and an LSD. :wink:
Whats the benefits of using a vr6 fd? More top speed low revs?
Taller overall gearing will reduce torque at the wheels, which is what will spin the wheels.
A mapped 20v has a lot more torque than a standard 16v so would generally benefit from taller gears. Spinning wheels may feel fast, but you drastically reduce acceleration.
That's why diesels can use longer gears they have more torque.
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What a hardship, :grin: I wish my issue was my car is just too damn fast!!! You put any pics up yet Godzilla? I want to see the beast!!!
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Stop driving like a nob...
:grin: :grin: :grin:
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Thanks people for advise.
Will be putting some pics up soon when she is to my standard as having a fair bit of work done on her :smiley:
Indeed 1st and 2nd are useless above 2.5k as she will just light up the wheels. I do like the engine though as it is the first 20vt I have had. If driven with care she is good on fuel, yet floor her and she will pick up very quickly. Only the other day I wondered what she was like when I came to an empty stretch of private road :whistle: I was doing around 50mph, dropped her in to 3rd and hard on the pedal, then to 4th and 5th and before I knew it I was doing 125mph.....As I say though, private road test :wink:
Not got a clue what speed she would top out at but this car does pull very well. Loads of good help from Benvictors who is a legend with these engines and F17BAD......So got all the correct spark plugs for a mapped car, AFM cleaned, Inlet manifold cleaned, throttle body cleaned, all breathers cleaned, new oil and oil filter OE.....Car has been fully clayed on every panel, mopped, polished and waxed so looking good. Locks changed so same key fits all, Toad alarm system fitted, loads of little electrical gremlins all sorted.....So I am getting there! I must have had some prying eyes whilst shopping the other day as came back to smear all over my back windows! My American Bulldog comes with me everywhere, he is a brute! He has his blanket in the back and sleeps and will carry on sleeping unless someone comes to close to my car so which he goes mental! Well this must have happened the other day....Whoever looked in through my window must have got a shock to be greeted by a load of teeth :grin:
So all going good and as I say.....Pics will come very shortly when she is finished.....Till then here is my dog that saved my car!
(http://i738.photobucket.com/albums/xx30/Zillaette2009/th_bear1_zps9db38465.jpg) (http://s738.beta.photobucket.com/user/Zillaette2009/media/bear1_zps9db38465.jpg.html)
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I use a mk4 GTI 2.0 8 valve box (same ratios as mk3 16v) but iv changed Final drive to a VR6 item and fitted a Wavetrac Differential
i have no wheelspin and the handling is much better
i had sh!t loads of spin before this, it was almost pointless having so much power low down.. not any more
my advice is dig deep in those pockets
also fit decent rubber on your rims
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I use a mk4 GTI 2.0 8 valve box (same ratios as mk3 16v) but iv changed Final drive to a VR6 item and fitted a Wavetrac Differential
i have no wheelspin and the handling is much better
i had sh!t loads of spin before this, it was almost pointless having so much power low down.. not any more
my advice is dig deep in those pockets
also fit decent rubber on your rims
How much would that set me back mate?
Also....With the VR final drive what would be the top speed and what would be my top speed now on my gearbox which is a MK3 GTI 16v with my engine (BVR) ?
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What i did was have the gearbox fully rebuilt by hotgolf and the flywheel was lightened / balanced at the same time, so the longer top gear has not taken anything away low down in the revs (because the flywheel spins faster now its lighter)
the wavetrac diff and ARP bolts were near £1000 with the Vr final drive
not a cheap game mate
top speed on my old 16V gearbox was 150 on the dials, the new top speed is greater, iv had it showing 160!
but how reliable the read out is at this speed is another story
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I use a mk4 GTI 2.0 8 valve box (same ratios as mk3 16v) but iv changed Final drive to a VR6 item and fitted a Wavetrac Differential
i have no wheelspin and the handling is much better
i had sh!t loads of spin before this, it was almost pointless having so much power low down.. not any more
my advice is dig deep in those pockets
also fit decent rubber on your rims
How much would that set me back mate?
Also....With the VR final drive what would be the top speed and what would be my top speed now on my gearbox which is a MK3 GTI 16v with my engine (BVR) ?
You can use a gearbox calculator to find out. Depends what revs your engine can pull and tyre size also.
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If you want to see how It comes about read here (http://www.clubgti.com/showthread.php?235941-Choosing-Gear-ratios-or-gearboxes-Using-dyno-data&highlight=)
Mighy make you head spin tho. :evil:
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a cda code box as fitted to mk3 gti's should do 142.2mph in fifth at 6500rpm with 195/50/15 tyres according to the pdf table that iv got :cool:
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a cda code box as fitted to mk3 gti's should do 142.2mph in fifth at 6500rpm with 195/50/15 tyres according to the pdf table that iv got :cool:
Sounds about right. I've pulled 6.5k in fifth before. Will indicate higher though. I changed my fifty to a g60 one to have similar cruise ratio to a VR until I get box built.