theMGZS.co.uk   Navigation

ArcadeModifications AboutNews Flyers Forum Events Home

Home
Go Back   theMGZS.co.uk :: MG ZS forum > Technical Area > Build Projects

Reply
 
Thread Tools Display Modes
Old 12-12-09, 10:22 PM   #1
p_b82
Smoky turbo weasel
 
p_b82's Avatar
 
Join Date: Sep 2008
Location: Bristol
Posts: 2,690
p_b82 is a jewel in the roughp_b82 is a jewel in the roughp_b82 is a jewel in the rough
tuned derv ZS update

Figured i would pop an update on here for those that done lurk on the other forums that have a vague interest in the saga that is tuning my derv ZS...

had it on the dyno today and still had a dissapointing 160bhp and only 220lbs-ft of torque once more much later in the rev range than expected and still way to smokey and too hot over 4000 rpm.

have finally come to the decision (that i should have madea while back) to try a different set of injectors as the ones that i have got are just too extreme for the vp30 fuel pump we have in the ZS.

So currently I am in the process of selling my current injectors and going to be making a hybrid injector out of the Zs standard injector and SDI injector.

Basically i am going to hope to keep the delivery and break pressure of the newer injector with the larger flow nozzle from the SDI. this should mean good atomisation of fuel, but more of it than the standard injector would normally flow. so it will be the best i can get for power, fuel economy and torque delivery...

the SDI's on their own tail off quite a lot after the peak, where the normal injecotr has the peak, but then holds torque flat until there fuel drops off. wth the hybrid turbo i am hoping to up the fuel after the torque peak and keep it at the same flat level as the peak for as long as possible.

I am hoping that this will give me a good starting point to start over with this dammed car....

normal injectors can give about 220lbs-ft peak torque with a remap, and SDI's around 250... if i can get 250 and hold it flat, then i might still see 170-180bhp.....

oh and it seems to have blown the exhaust manifold gasket - probably the 27PSI boost it is currently peaking at.. and it looks like it has pissed the gearbox oil out again, as it dropped out of 5th a few times on the motorway this morning..

all in all an expensive experiment i tried.... here is hoping to better luck with my new plans.
__________________
------------------------------
theMGZS.co.uk Supporter
------------------------------
__________________
Mods Fitted
Pipercross Filter; Full 2.5" 'Wingy' exhaust; Donny Custom Turbo outlet pipe; Custom injectors;
Uprated gearbox bearings; Helix Clutch; Quaife ATB; Upgraded clutch Hydraulics; FMIC; Ported Head; ARP headstuds; Leda coilovers; 'Brembodge' 326mm disks/DS2500 pads
Dieselpowered
Fitting Custom Hybrid Turbo (1856GTBv) & controller; Remap, swirlpot, lift pump
AMW Motorsports
Custom exhaust manifold & downpipe
p_b82 is offline   Reply With Quote
Old 13-12-09, 08:55 AM   #2
peterzs
promoted bloke!
 
peterzs's Avatar
 
Join Date: May 2008
Location: bournemouth
Posts: 16,337
peterzs is a splendid one to beholdpeterzs is a splendid one to beholdpeterzs is a splendid one to beholdpeterzs is a splendid one to beholdpeterzs is a splendid one to beholdpeterzs is a splendid one to beholdpeterzs is a splendid one to beholdpeterzs is a splendid one to beholdpeterzs is a splendid one to behold
Smile

Sorry you didnt get the result you wanted.

When I got my derv didnt know much about the car or engine, I was hopeing it was a common rail BMW lump. As i thought it would be great for tuning, etc.

Soon found out it was the L series, still its goes OK now.

I dont have a clue on the derv, thats why I've been following your project so closely and thanks for posting up the good and bad points.

My one does smoke a bit, but thats when you get up to 70!!!!!

All the best with the new set up and hope you sort the problems out. At least you are the front runner in the derv development cause, always a difficult place to be.

__________________
------------------------------
theMGZS.co.uk Admin
------------------------------
peterzs is offline   Reply With Quote
Old 13-12-09, 09:03 AM   #3
stamford
Site Owner
 
stamford's Avatar
 
Join Date: Jul 2007
Location: Waterlooville, Hants
Posts: 23,782
stamford has much to be proud ofstamford has much to be proud ofstamford has much to be proud ofstamford has much to be proud ofstamford has much to be proud ofstamford has much to be proud ofstamford has much to be proud ofstamford has much to be proud ofstamford has much to be proud ofstamford has much to be proud ofstamford has much to be proud of
I admire you for persevering with this project, sorry to hear you have had problems. But that's the way these things go, positives and negatives but the main thing is learning from it. Do keep us updated as it is interesting to see another perspective.
__________________
------------------------------
theMGZS.co.uk Admin
------------------------------
__________________
Some useful links:
stamford is offline   Reply With Quote
Old 13-12-09, 09:09 AM   #4
peterzs
promoted bloke!
 
peterzs's Avatar
 
Join Date: May 2008
Location: bournemouth
Posts: 16,337
peterzs is a splendid one to beholdpeterzs is a splendid one to beholdpeterzs is a splendid one to beholdpeterzs is a splendid one to beholdpeterzs is a splendid one to beholdpeterzs is a splendid one to beholdpeterzs is a splendid one to beholdpeterzs is a splendid one to beholdpeterzs is a splendid one to behold
Smile

Quote:
Originally Posted by stamford View Post
I admire you for persevering with this project, sorry to hear you have had problems. But that's the way these things go, positives and negatives but the main thing is learning from it. Do keep us updated as it is interesting to see another perspective.
Turbo route Mick, nice ZS derv.

__________________
------------------------------
theMGZS.co.uk Admin
------------------------------
__________________
peterzs is offline   Reply With Quote
Old 13-12-09, 09:59 AM   #5
Steves Cleenz
formally known as Typhoon 180
 
Join Date: Jul 2007
Location: Tamworth, Staffs
Posts: 2,192
Steves Cleenz has a spectacular aura aboutSteves Cleenz has a spectacular aura about
You are going to have a look at my van when I come down next week and tell me what you think to how that goes with just the little mods I have done
__________________
Paint Correction Specialists covering the UK


Last edited by Steves Cleenz; 13-12-09 at 03:34 PM.
Steves Cleenz is offline   Reply With Quote
Old 13-12-09, 10:28 AM   #6
Supercharged_Z
KV6 Supercharged
 
Supercharged_Z's Avatar
 
Join Date: Jul 2007
Location: Leighton Buzzard
Posts: 3,158
Supercharged_Z is just really niceSupercharged_Z is just really niceSupercharged_Z is just really niceSupercharged_Z is just really niceSupercharged_Z is just really nice
if you could get your dervs to 170bhp that would be mint!!! just a shame it dosnt sound like a v6 lol
__________________
------------------------------
theMGZS.co.uk Supporter
------------------------------
Supercharged_Z is offline   Reply With Quote
Old 13-12-09, 01:42 PM   #7
p_b82
Smoky turbo weasel
 
p_b82's Avatar
 
Join Date: Sep 2008
Location: Bristol
Posts: 2,690
p_b82 is a jewel in the roughp_b82 is a jewel in the roughp_b82 is a jewel in the rough
sure thing Steve

The turbo can techncially flow enough air for about 190bhp in the diesels, so dropping it down to 25PSi (as that is really as high i i want to run it) i could techncially see around the 170-180 mark.

that has always been the plan to get close to a 180 as i could but still maintain the economy.... was a rather poor 38mpg last tank but i was testing out a few things since the boost leak was fixed.....

the real problem with the power figure with diesels is that we only have such limited rpm to play with, mine is currently still pulling at 4200rpm, but as the injector just dump the fuel in, it is not atomising properly, and there is just not enough time to burn it. hence seeing temps in the exhuast manifold of 900C when doing a flat out run in 5th.

It is true it will never sound like a v6 - in fact in usual L-series fashion it sounds rough and un-refined, but generates a few turned heads when on boost
__________________
------------------------------
theMGZS.co.uk Supporter
------------------------------
__________________
Mods Fitted
Pipercross Filter; Full 2.5" 'Wingy' exhaust; Donny Custom Turbo outlet pipe; Custom injectors;
Uprated gearbox bearings; Helix Clutch; Quaife ATB; Upgraded clutch Hydraulics; FMIC; Ported Head; ARP headstuds; Leda coilovers; 'Brembodge' 326mm disks/DS2500 pads
Dieselpowered
Fitting Custom Hybrid Turbo (1856GTBv) & controller; Remap, swirlpot, lift pump
AMW Motorsports
Custom exhaust manifold & downpipe
p_b82 is offline   Reply With Quote
Old 25-01-10, 02:56 PM   #8
p_b82
Smoky turbo weasel
 
p_b82's Avatar
 
Join Date: Sep 2008
Location: Bristol
Posts: 2,690
p_b82 is a jewel in the roughp_b82 is a jewel in the roughp_b82 is a jewel in the rough
quick update....

Car is off to hospital tomorrow (was suppsoed to be today but the r25 loan car is poorly)

having the gearbox removed and stripped to fix the 5th gear issue - suspected spring failure for the synchromesh being the likely culprit.

Also getting my hybrid injectors fitted which co-insides well with a trip to Yeovil for yet another trip on the dyno on Saturday morning....

here is hoping to get it smoke free and some decent figures - tho we have no idea quite what to expect as it is an experiment and no-one has tried it before.

If it fails i will just pop the SDi nozzles back on the SDi injectors and go from there.

*keeps fingers crossed*
__________________
------------------------------
theMGZS.co.uk Supporter
------------------------------
__________________
Mods Fitted
Pipercross Filter; Full 2.5" 'Wingy' exhaust; Donny Custom Turbo outlet pipe; Custom injectors;
Uprated gearbox bearings; Helix Clutch; Quaife ATB; Upgraded clutch Hydraulics; FMIC; Ported Head; ARP headstuds; Leda coilovers; 'Brembodge' 326mm disks/DS2500 pads
Dieselpowered
Fitting Custom Hybrid Turbo (1856GTBv) & controller; Remap, swirlpot, lift pump
AMW Motorsports
Custom exhaust manifold & downpipe
p_b82 is offline   Reply With Quote
Old 25-01-10, 04:48 PM   #9
peterzs
promoted bloke!
 
peterzs's Avatar
 
Join Date: May 2008
Location: bournemouth
Posts: 16,337
peterzs is a splendid one to beholdpeterzs is a splendid one to beholdpeterzs is a splendid one to beholdpeterzs is a splendid one to beholdpeterzs is a splendid one to beholdpeterzs is a splendid one to beholdpeterzs is a splendid one to beholdpeterzs is a splendid one to beholdpeterzs is a splendid one to behold
Smile

Best of luck, hope it all goes well.

__________________
------------------------------
theMGZS.co.uk Admin
------------------------------
__________________
peterzs is offline   Reply With Quote
Old 25-01-10, 05:03 PM   #10
Jay-ZS+
Site Supporter
 
Jay-ZS+'s Avatar
 
Join Date: Aug 2008
Location: Bristol
Posts: 6,835
Jay-ZS+ is a glorious beacon of lightJay-ZS+ is a glorious beacon of lightJay-ZS+ is a glorious beacon of lightJay-ZS+ is a glorious beacon of lightJay-ZS+ is a glorious beacon of lightJay-ZS+ is a glorious beacon of light
Yer good luck with it Pete hope you unlock all that potential it has!
__________________
------------------------------
theMGZS.co.uk Supporter
------------------------------
__________________
James

2012 BMW 320d Sport
Jay-ZS+ is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT. The time now is 06:53 AM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2019, vBulletin Solutions Inc.
Copyright ? 2010 theMGZS.co.uk