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HMC911T
Newbie


Joined: 06 Apr 2019
Posts: 9



PostPosted: Thu Sep 12, 2019 7:22 am    Post subject: POOR PERFORMANCE : ( Reply with quote

Hi

People

Looking for any ideas here ?

I have an 02 996 turbo stock 93k full porsche service history with eismann exhaust sports cat

I had taken it in for a stage 1 remap I recieved a call stating that I had a boost leak.

The remap place recommended another garage to fix the problem turns out one of the pipes had been bodged before so they said replace
£820 later.

Just had my car remapped again and it only made a 2 hp gain with the new boost pipe fitted.

So the results from the remap are 438 BHP and 650 n/m torque
They said the torque was as expected but obviously the hp is down

Has any body experienced this any ideas what it could be ??

Are the turbos going out??

Not sure any help would be greatly appreciated!
 
  
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cheshire911
Estoril


Joined: 10 Jun 2012
Posts: 3841



PostPosted: Thu Sep 12, 2019 8:09 am    Post subject: Reply with quote

I'd suggest that you speak to Wayne at Chip Wizard (look him up on the web).
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Phil 997
Le Mans
Le Mans


Joined: 05 Dec 2015
Posts: 15313
Location: Bournemouth,Dorset

2009 Porsche 997 Carrera 4S

PostPosted: Thu Sep 12, 2019 4:18 pm    Post subject: Reply with quote

I would first txt Wayne as he doesn't answer his phone while he's working due to background noise , he is the best of the best with mapping Thumb

https://chipwizards.co.uk
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ragpicker
Reims


Joined: 14 Apr 2013
Posts: 4024
Location: North East England


PostPosted: Thu Sep 12, 2019 4:57 pm    Post subject: Reply with quote

As above.

If only there was a well modified turbo for sale with a bulleproof, rebuilt engine Question

http://911uk.com/viewtopic.php?t=131025&highlight=

Then there wouldn't be any problems with performance....

(sorry for the shameless plug)


not sorry
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986 S - usually in pieces: http://911uk.com/viewtopic.php?t=112626
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NedHan79
Nürburgring


Joined: 08 Nov 2018
Posts: 495



PostPosted: Thu Sep 12, 2019 5:39 pm    Post subject: Reply with quote

Who did the mapping? What boost pressures are set? Was it live mapped on a dyno or on the road? Did you get any sort of graphs to back up results?

There are a world of questions. I’m not a mapper and I’m definitely not an expert but I have been through the mill tuning other turbo cars to various levels. One thing is people always expect figures far higher than realistic though your hp result sounds poor. Low down torque would be the big player in a mapped performance car and I would expect spool and torque should be excellent in a twin turbo car as 2 small turbos are obviously sharper than one large.

How does the car feel?
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HMC911T
Newbie


Joined: 06 Apr 2019
Posts: 9



PostPosted: Thu Sep 12, 2019 7:00 pm    Post subject: Reply with quote

Thanks guys I'll message him

The car seems spot on it pulls well enough no flat spot pulls lovely through the rev range I'm just concerned to why the horse power is that low ?

I'm hoping it's not a serious problem ?
 
  
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deMort
Dijon


Joined: 21 Mar 2015
Posts: 7176
Location: Brighton


PostPosted: Thu Sep 12, 2019 8:00 pm    Post subject: Reply with quote

I don't normally answer any post on modding / mapping as its well out of my comfort zone .. i'm afraid i fix standard porsches .. i tend to get stuck with faults with modded cars.

What i will say .. first check is any fault codes stored in the dme ..

Second check .. what are the fuel adaptions saying for idle , mid and high range rpm .

The figure of 438 BHP .. i'm assuming that's flat out .. balls to the wall with no Lambda adaptations .. the car just dumps as much fuel as it can ..

Well .. is there enough fuel when flat out Question

A fuel pump that's 17 years old might not deliver the amount required .. seen a few on this forum where fuel pumps have been at fault .. its also an item that i tend to say these days its best to replace even if you don't have a problem . old and tired basically .


Nothing to say its not turbos but at the end of the day that's just a fan spinning at high rpm and chucking as much air into the engine that it can .. its either works or it doesn't as a rule of thumb .. i know that's simplistic but for arguments sake ..

If not enough fuel then it will be down on power at max rpm .

Just my thoughts anyways and as i said .. a wee bit out of my comfort zone .
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ok51mon
Imola


Joined: 08 Oct 2014
Posts: 766



PostPosted: Thu Sep 12, 2019 8:57 pm    Post subject: Re: POOR PERFORMANCE : ( Reply with quote

HMC911T wrote:
Hi

People

Looking for any ideas here ?

I have an 02 996 turbo stock 93k full porsche service history with eismann exhaust sports cat

I had taken it in for a stage 1 remap I recieved a call stating that I had a boost leak.

The remap place recommended another garage to fix the problem turns out one of the pipes had been bodged before so they said replace
£820 later.

Just had my car remapped again and it only made a 2 hp gain with the new boost pipe fitted.

So the results from the remap are 438 BHP and 650 n/m torque
They said the torque was as expected but obviously the hp is down

Has any body experienced this any ideas what it could be ??

Are the turbos going out??

Not sure any help would be greatly appreciated!


Your car is still leaking. DM me we can talk it out on the phone.
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ok51mon
Imola


Joined: 08 Oct 2014
Posts: 766



PostPosted: Thu Sep 12, 2019 8:59 pm    Post subject: Reply with quote

ragpicker wrote:
As above.

If only there was a well modified turbo for sale with a bulleproof, rebuilt engine Question

http://911uk.com/viewtopic.php?t=131025&highlight=

Then there wouldn't be any problems with performance....
x
(sorry for the shameless plug)


not sorry


The engine is only bulletproof if it comes with warranty Hand
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Osh
Sepang


Joined: 19 Nov 2012
Posts: 2951
Location: Bristol


PostPosted: Fri Sep 13, 2019 3:14 pm    Post subject: Reply with quote

ragpicker wrote:
As above.

If only there was a well modified turbo for sale with a bulleproof, rebuilt engine Question

http://911uk.com/viewtopic.php?t=131025&highlight=

Then there wouldn't be any problems with performance....

(sorry for the shameless plug)


not sorry


Raggy - any idea where I might buy such a car...??


Osh
 
  
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Jay.
Montreal


Joined: 20 Oct 2015
Posts: 576
Location: Brize Norton


PostPosted: Sat Sep 14, 2019 3:48 pm    Post subject: Reply with quote

Good to hear that Wayne has a great reputation here.

What are you going to on the boost read out? e.g. 0.7, 1.0, 1.1, 1.2?
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EddieCRX
Trainee


Joined: 30 Jun 2014
Posts: 90
Location: Paris


PostPosted: Wed Sep 18, 2019 2:35 pm    Post subject: Reply with quote

Was the power at the wheels?
438WHP calculates to just over 500 HP (Crank)
 
  
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jerzybondov
Monza


Joined: 27 Apr 2015
Posts: 163



PostPosted: Wed Sep 18, 2019 3:03 pm    Post subject: Reply with quote

EddieCRX wrote:
Was the power at the wheels?
438WHP calculates to just over 500 HP (Crank)


Yep 438 - if it is at the wheels - sounds pretty healthy to me!
 
  
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