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1.6 JX TD - Top Speed 55MPH ish....?

Printed From: The Brick-yard
Category: T3 Section
Forum Name: T3 Tech help
Forum Description: Forum for T3 specific problems.
URL: http://www.brick-yard.co.uk/forum/forum_posts.asp?TID=92444
Printed Date: 22 Sep 17 at 19:53
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com


Topic: 1.6 JX TD - Top Speed 55MPH ish....?
Posted By: Adef
Subject: 1.6 JX TD - Top Speed 55MPH ish....?
Date Posted: 16 Feb 17 at 09:45
researched through old posts, but still not sure whether I have a fixable issue or not.

1.6 JX TD (replacement engine in Germany around 2002), Westy HT, 5 Speed - it's doing 4000rpm in 5th and 85 KPH (52 MPH), would go a little further but red-lines at roughly 4500 I think, standard wheels.

It's a bit smokey but even if I have engine/turbo issues the ratio won't change, other posts talk about cruising at 100-110 KPH, I'm some way off - what options do I have...? Am I missing something?

 


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'89 Club Joker High Top



Replies:
Posted By: Titus A Duxass
Date Posted: 16 Feb 17 at 15:54
85kph is way too low, mine would easily pull 115kph.
You may want to search on here for Baxter's smoky JX thread.

That'll be your starter for 10.


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Bollocks to it all!!
51°24′N 12°52′E


Posted By: Titus A Duxass
Date Posted: 16 Feb 17 at 15:57
Here ya go -  http://www.brick-yard.co.uk/forum/the-definitive-smokey-jx-thread_topic33228.html" rel="nofollow - http://www.brick-yard.co.uk/forum/the-definitive-smokey-jx-thread_topic33228.html

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Bollocks to it all!!
51°24′N 12°52′E


Posted By: Adef
Date Posted: 16 Feb 17 at 16:07
Thanks - i took a look there before posting , but it won't change the fact I'm revving 4000rpm for 85KPH will it... the ratio is the ratio, that's where I'm confused.
Could I have the wrong gearbox, how would I know etc, was my rough thinking.....


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'89 Club Joker High Top


Posted By: Timjburrows
Date Posted: 16 Feb 17 at 17:26
The worst possable combination would give you 50 mph @3269 rpm on standard tyres,SO have you tried a sat nav for an accurate speed on a flat road?and a tachometer on the crankshaft for an accurate rpm reading as at least one is incorrect?unless the clutch is slipping?


Posted By: fatboy
Date Posted: 17 Feb 17 at 00:11
Are you aware of the pattern of the gearbox? Are you definitely in fifth gear? That is extremely slow for the revs you are quoting.

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'83 T3 westy
'85 SA microbus
Seat torpedo
68 buggy again!

Shit I need to sell some MORE cars!


Posted By: Adef
Date Posted: 17 Feb 17 at 09:28
HI Guys - further investigation last night, clearly a newbie :), but still the same speed issues:

Think engine is a AAZ 1.9 TD (1.9 Stamped on bottom) '95 AAZ 1.9 TD written on rocker cover. (Haven't found engine number yet dispite reading all threads/info)
Gearbox is a 3H
Tyres 205/70/14 (Original VW Alloys)

Rev counter could be wrong?

I'm definitely in 5th, speed from speedo is about right as have other half follow me, plus get overtake my trucks on Mway.
(Will post pic of engine if that helps)

Reading lots of posts last night, an AAZ and 3H box should be working fine and giving me around 60-65mph around the 3600 ish rpm....?
Confused.




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'89 Club Joker High Top


Posted By: BeJay
Date Posted: 17 Feb 17 at 10:34
  
If you're definitely in 5th gear and the speedo is reading correct(ish) then it has to be one of the other two possibilities already mentioned, either your tacho is lying to you, (what do your ears tell you? does the engine SOUND like it's revving its nuts off if you get someone to hold it at 4000 revs on the tacho for a few seconds? and as mentioned get a true reading from a crankshaft tacho), or you've got a slipping clutch also as mentioned, I can't really see any other options. 


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NIL ILLIGITIMUS CARBORUNDUM


Posted By: oxford_rebel
Date Posted: 17 Feb 17 at 12:09
My money is on the rev counter reading wrong. It's fed from the W terminal on the alternator and it's quite common for AAZ engines to have a mix match of belts and pulleys leading to a misreading. Mine read under by about 1000rpm at 3k for years, until we changed the belt setup to a golf flat belt and pulleys and it all worked fine after that. I'd be checking your engine revs are actually doing what the tacho says.
Cruising at 55mph, does it feel likening has plenty of go left in it? My AAZ was pretty much foot to the floor and nothing left to give after 70mph, but would pull well in top from 55mph.

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Need Bands, PA, Staging or Lighting for your VW event? - http://www.soundwaveaudio.co.uk" rel="nofollow - Soundwave Audio


Posted By: Adef
Date Posted: 17 Feb 17 at 12:46
thanks all - don't think it has much go after 55 so maybe clutch, but I need to get out of the Devon lanes and do another test run, will sort a reading from the crankshaft, see if clutch is slipping etc, I'll be happy with a 65mph cruise, so fingers crossed.

Thanks for all advice


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'89 Club Joker High Top


Posted By: ob1
Date Posted: 17 Feb 17 at 14:00
I've got an AAZ with 3H box. I can pull a sat nav 80mph plus at 4.7k revs?
I'm in Torbay next time you fancy it pop round and we can go for a spin and see if we can suss it out?
Infact think I've just asked about your buddy seat!!


Posted By: mrhutch
Date Posted: 17 Feb 17 at 17:31
possible you haven't got a 3H box?



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T3 1981 Westy Vanagon - thinks lubricant is a fuel


Posted By: ob1
Date Posted: 17 Feb 17 at 19:35
I've got mega tall rear tires on? 215 x 70 r16


Posted By: booted
Date Posted: 20 Feb 17 at 16:08
if the clutch isn't slipping I would fingd the gearbox code to make sure you have the box you think you have. code will be stamped on the flat bit on the gearbox below the reversing light switch


Posted By: ob1
Date Posted: 20 Feb 17 at 17:14
I keep thinking would a 4 speed linkage on a 5 speed box mean you only in third?


Posted By: lambretta lee
Date Posted: 20 Feb 17 at 19:20
Originally posted by ob1 ob1 wrote:

I keep thinking would a 4 speed linkage on a 5 speed box mean you only in third?
surely he'd know if he changed gear 5 times ..


Posted By: ob1
Date Posted: 20 Feb 17 at 19:44
Hmm good point - very sloppy gear linkages...


Posted By: Adef
Date Posted: 21 Feb 17 at 13:31
It's had new linkages I think, and I'm 99.99% sure I'm in 5th :)

Need to give it another run out this week, keeping my ear on the Revs, plus Ob1 is local and has offered to compare against his, so hopefully doing that soon, will update on results.
thanks all


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'89 Club Joker High Top


Posted By: Timjburrows
Date Posted: 21 Feb 17 at 19:26
When your doing 55mph put your foot down on the clutch and see if it revs any more then you would know if it's flat out or not


Posted By: Pete Westy
Date Posted: 21 Feb 17 at 20:57
Any long downhill stretches on the A38 to try it on with your foot on the floor?


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Pete



I've spent so much time under the Atlantic I'm changing my name to Titanic.


Posted By: rowlesy
Date Posted: 21 Feb 17 at 20:58
Originally posted by Timjburrows Timjburrows wrote:

When your doing 55mph put your foot down on the clutch and see if it revs any more then you would know if it's flat out or not

of course it will rev more - suddenly the engine only has to turn itself over!!!! LOL


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UberFukz broke another!       sucky sucky five dollah!

always out numbered never out gunned!    RWS welding 07846 380 467 (worcs)


Posted By: mrhutch
Date Posted: 21 Feb 17 at 21:05
whs ^^

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T3 1981 Westy Vanagon - thinks lubricant is a fuel


Posted By: Bromy
Date Posted: 22 Feb 17 at 00:03
Chuck it in 5th with your handbrake on tight and see how far you can let off the clutch before it stalls. But im sure you would recognize a slipping clutch if its that bad 

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"follow the masses, do the opposite"


Posted By: ELVIS
Date Posted: 22 Feb 17 at 00:12
Originally posted by rowlesy rowlesy wrote:

Originally posted by Timjburrows Timjburrows wrote:

When your doing 55mph put your foot down on the clutch and see if it revs any more then you would know if it's flat out or not

of course it will rev more - suddenly the engine only has to turn itself over!!!! LOL

I understand what your#e saying Tim, shame the fuckwit sisters don't spend as much time reading as they do writing..............


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Www.justgiving.com/ELVIS-SUMMERS



Posted By: rowlesy
Date Posted: 22 Feb 17 at 20:18
Originally posted by ELVIS ELVIS wrote:

Originally posted by rowlesy rowlesy wrote:

Originally posted by Timjburrows Timjburrows wrote:

When your doing 55mph put your foot down on the clutch and see if it revs any more then you would know if it's flat out or not

of course it will rev more - suddenly the engine only has to turn itself over!!!! LOL

I understand what your#e saying Tim, shame the fuckwit sisters don't spend as much time reading as they do writing..............

what the actual fuck elvis! so your in 4th/5th gear driving and your doing 55 and it wont go any faster so you depress the clutch and fuck me the engine suddenly has a lot less to do! if it didnt pick up revs i'd be looking for a new engine there and then! just because you've depressed the clutch doesnt mean that it should go faster if the revs rise......resistance thats called! and we've all heard of the phrase "transmission loss"


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UberFukz broke another!       sucky sucky five dollah!

always out numbered never out gunned!    RWS welding 07846 380 467 (worcs)


Posted By: Bromy
Date Posted: 22 Feb 17 at 21:32
Resistance or load.... LOL

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"follow the masses, do the opposite"


Posted By: Timjburrows
Date Posted: 22 Feb 17 at 21:47
The point I was making was the WORST gear ratios give you a speed of 50mph at 3269 rpm SO by putting your foot on the clutch when you think your doing 4500rpm may tell you weather the engine is flat out or not,at the beginning of this post I did say have you checked the speed with a sat nav and the engine rpm with a rev counter as theoretical its impossible to do 52 mph at 4000 rpm UNLESS the clutch is slipping!


Posted By: Adef
Date Posted: 08 Mar 17 at 08:42
Update - garage couldn't get me a rpm reading (not sure why) but they said the Rev counter is 100% not accurate (eg. Turbo kicks in at 4500 according to rev counter)
Will research how I might correct the issue and taking on board comments.

(managed 100kph on an A road but was a bit windy for the HT, will venture north to a dual carriageway soon to give it full beans)

Thanks All.


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'89 Club Joker High Top


Posted By: Adef
Date Posted: 03 Apr 17 at 15:50
Closure (maybe). Bought a photo tacho laser things from Amazon for £13, worked well, got a reading off the crank of around 750rpm at idle where my rev counter was reading 1100. 

Further forum research and I removed the rev counter and adjusted the potentiometer, also found a loose connection to the Rev counter which managed to fix.

Seems much better now, but don't think it's 100%, done 100kph (62mph) on local A Road and it's got more to go, still sounds like it needs a 6th gear, but I guess that's the original 3H ratios - maybe a gearbox change one day.
Case Closed for now at least.




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'89 Club Joker High Top


Posted By: Titus A Duxass
Date Posted: 04 Apr 17 at 05:05
Originally posted by Adef Adef wrote:

......., still sounds like it needs a 6th gear, but I guess that's the original 3H ratios - maybe a gearbox change one day.

They all sound like that. I ran 5% larger tyres on mine for a while, the JX would just coped with it, it went over saddleworth moor in top. 


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Bollocks to it all!!
51°24′N 12°52′E


Posted By: mrhutch
Date Posted: 04 Apr 17 at 09:31
^^^ WHS

I went to 11% oversize on an old bus of mine, running a turbo'd 1Y
was too large really, gap between 4th and fifth too large


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T3 1981 Westy Vanagon - thinks lubricant is a fuel



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