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sackerley
Monza


Joined: 16 Mar 2016
Posts: 195



PostPosted: Thu Jun 13, 2019 4:16 pm    Post subject: Reply with quote

Brilliant! I like your style!

And totally agree with looking at these kind of issues as an opportunity.
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Hooner
Monza


Joined: 03 May 2018
Posts: 155
Location: Co Antrim,NI


PostPosted: Thu Jun 13, 2019 7:06 pm    Post subject: Reply with quote

Ghianightmare wrote:
So I’m going to convert to a 3.9...

What’s the point in spending a heap of money only to get what you had previously, when you can just ask the bank for a little more and get something different?

We’re here for a good time, not a long time... Very Happy

Clutch, flywheel, brake pipes, will be done at the same time.


That's the spirit, top stuff thumbsup
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Robertb
Dijon


Joined: 01 Sep 2003
Posts: 7120
Location: South Oxfordshire

2002 Porsche 996 Carrera 4S

PostPosted: Thu Jun 13, 2019 8:03 pm    Post subject: Reply with quote

Ghianightmare wrote:
So I’m going to convert to a 3.9...

What’s the point in spending a heap of money only to get what you had previously, when you can just ask the bank for a little more and get something different?

We’re here for a good time, not a long time... Very Happy

Clutch, flywheel, brake pipes, will be done at the same time.


You sir are an inspiration! Thumb
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MisterCorn
Dijon


Joined: 08 Jan 2011
Posts: 7150
Location: Nottingham, England

2004 Porsche 996 Turbo

PostPosted: Thu Jun 13, 2019 8:06 pm    Post subject: Reply with quote

It will be superb, good choice Thumb

MC
 
  
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Brucey1
Trainee


Joined: 15 Feb 2017
Posts: 68



PostPosted: Thu Jun 13, 2019 8:20 pm    Post subject: Reply with quote

I like your style mate , if your keeping it , why not !!😁
 
  
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Mad Mark911
Silverstone


Joined: 16 Dec 2011
Posts: 127
Location: Maidenhead


PostPosted: Sun Jun 16, 2019 8:19 am    Post subject: Reply with quote

Very sorry to hear your story, OP - but like your approach to fixing it!

What does one of Hartech's "bullet proof" 3.9's kick out in terms of output?
I imagine substantially more power than the standard 3.4 but is it as "revvy"? Of course I'm guessing the low end / mid range torque will be vastly improved!
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bazhart
Approved Trader


Joined: 20 May 2009
Posts: 955
Location: Bolton Lancashire


PostPosted: Sun Jun 16, 2019 10:55 am    Post subject: Reply with quote

There is a short write up on our oversized engines on our web site www.hartech.org that has some graphs showing differences in output.

But there is a lot more to follow soon in comprehensive reports on the whole subject.


I hope you guys realise that any increase in Torque at one particular rev point will be the same % increase in BHP at those revs (since revs are the only variable).

Bearing that in mind - in most cases our oversized engines increase maximum torque by around 15% (and therefore BHP by 15% at the same revs) but increase maximum BHP at peak revs by about 10% (because the torque is always lower at peak revs with there being less time to fill and evacuate the cylinders).


The 3.4 to 3.7 is often better than that and so is the 3.4 Cayman S to 3.9.


The new report (available soon) explains why it is the rear wheel torque graph against speed (shown in the above short write up) that shows how extra mid range torque increases acceleration much more than power at peak revs - but if this controversial subject is confusing you will have to wait until the full report is available where I try and explain it (it takes a lot of work and pages of writing and graphs etc to do so).


Perhaps it would help to notice the revs you usually accelerate from and what revs you usually change up a gear at during normal or fast driving to understand the benefits.


Just because there is even more torque in the mid range does not reduce the addition power you also get higher in the rev band and this is much better (and makes for a much nicer car to drive) and faster than trying to increase the revs and peak BHP of a standard sized engine.


I hope this doesn't unearth the usual arguments as I am too busy to respond in detail on here when I have dome so in great detail in the forthcoming report.

Baz
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Phil 997
Le Mans
Le Mans


Joined: 05 Dec 2015
Posts: 15279
Location: Bournemouth,Dorset

2009 Porsche 997 Carrera 4S

PostPosted: Sun Jun 16, 2019 5:27 pm    Post subject: Reply with quote

Ghianightmare , I do like your thinking and as we have discussed on here many times, fortunately due to the low depreciation of these cars it make the man maths work well on a car you intend to keep a while , the Hartech 3.9 will make you grin ,it will be as bullet proof as its possible to be , it will ad value and will cost less than you would lose in depreciation if you had brought a BMW or Merc instead of the 911.
Tell the wife I have a tent you can borrow for the Lake District Grin Grin

Its quite easy to get from Manchester Airport to Hartech in Bolton, I know as I picked my car up from them a couple of months ago after its rebuild sadly they are not ready yet and haven't finished development with the 4ltr 997.2 conversion otherwise I would have had that 100% .

Its good to read that water-cooled owners are starting to be as calm and accepting about rebuilding the engine as the Air-cooled guys have been for a long time , its part of the Porsche journey and as I said only costs the same as the depreciation you would suffer on pretty much any other car owned for 4 years or so . Thumb Thumb
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Ghianightmare
Spa-Francorchamps


Joined: 25 Apr 2017
Posts: 343
Location: Dublin


PostPosted: Sun Jun 16, 2019 8:17 pm    Post subject: Reply with quote

Thanks Baz - good explanation- you seem to know your stuff! Thumb

Hi Phil - thanks for the offer of the tent! I’ll keep you posted. I have been looking at the train options - change once and then a 600m walk apparently.

With regard to accepting the rebuild - I did my due diligence prior to purchase. There isn’t anyone that could have predicted a second valve seat failure, so it is just bad luck. I can’t blame myself or anyone.

I’ve done a lot of work on the car and with the engine and additional bits being done, it will be very close to a zero mile car from a mechanical perspective, so as bulletproof as I can make it like you said. It’s a huge chunk of change from one financial perspective, but as you say, it is stable from a depreciation perspective. The wife’s BMW has cost us €20,000 in 3 years and I doubt i’ll Lose that much during my ownership.

Regards

Padraig
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Ghianightmare
Spa-Francorchamps


Joined: 25 Apr 2017
Posts: 343
Location: Dublin


PostPosted: Tue Jul 16, 2019 4:18 pm    Post subject: Reply with quote

Car nearly ready. Dyno complete and its having a final shakedown. Flights booked. Picking up the car on Tuesday the 30th as i cant get over any sooner.

Going to do a trip back through Wales and stay in Aberystwyth that night and get a ferry back to Dublin on the 31st. I have a route i did a few years ago (albeit in my then TR6 chasing 2 Boxsters) that i will now do backwards!

Cant wait!
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Ghianightmare
Spa-Francorchamps


Joined: 25 Apr 2017
Posts: 343
Location: Dublin


PostPosted: Tue Jul 30, 2019 7:16 pm    Post subject: Reply with quote

I picked up my car today. It is transformed - obviously - and driving it is effortless. The power is so useable and 4th gear is my new 3rd as I can just leave it in it and use only my right foot to drive the Twisty bits! I didn’t go much above 6k rpm at any stage as there wasn’t really any need and I didn’t get much chance to Floor it completely as again, even at 3/4 throttle, it was just powering through the gears.

The new clutch assist spring and gear selection cables transform the driving experience - clutch is like slicing butter and the gear select is slick and precise.

It was great to get a tour of the Hartech Facility and workshop and to meet Tobias and Grant. It is a serious set up.

I’ll go back for the first service on 2,000 miles.

In Aberystwyth tonight soaking it all in. Another blast tomorrow through Wales to Holyhead! Very Happy
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apollokre1d
Sepang


Joined: 06 Nov 2012
Posts: 2960
Location: United Kingdom


PostPosted: Tue Jul 30, 2019 7:19 pm    Post subject: Reply with quote

Excellent result Smile
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coullstar
Albert Park


Joined: 15 Sep 2015
Posts: 1533
Location: Aberdeen/Torphins


PostPosted: Tue Jul 30, 2019 8:12 pm    Post subject: Reply with quote

Ace!!!
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Mad Mark911
Silverstone


Joined: 16 Dec 2011
Posts: 127
Location: Maidenhead


PostPosted: Tue Jul 30, 2019 8:54 pm    Post subject: Reply with quote

Congrats. Any pics available? What did it make on the Dyno?
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Ghianightmare
Spa-Francorchamps


Joined: 25 Apr 2017
Posts: 343
Location: Dublin


PostPosted: Wed Jul 31, 2019 8:13 am    Post subject: Reply with quote

I have lots of pics on the work, but they are on a memory stick. I’ll post some when I get home.

The car made 351 and 353bhp on the tuners dyno. The torque number escapes me at the moment. I’ll check the file when I get out to the car . Hartech also run it on their own dyno with a set of wheels and tyres that they use on all cars that they run on their own to keep parameter variables as low as possible. I think it got 340 on theirs. They do it because they want to build up a data base in general and on the capacity increase engines.
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Kingb4
Nürburgring


Joined: 20 Jan 2018
Posts: 378
Location: Beds/Bucks


PostPosted: Wed Jul 31, 2019 8:29 am    Post subject: Reply with quote

Great news - enjoy the drive home!
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Ghianightmare
Spa-Francorchamps


Joined: 25 Apr 2017
Posts: 343
Location: Dublin


PostPosted: Wed Jul 31, 2019 3:06 pm    Post subject: Reply with quote

In Holyhead waiting for the ferry - a fantastic drive through Wales - there just isn’t a bad road here. I’m loving the car even more - the power is so useable - it will pull from 2000 rpm in 4th with ease.

I just checked the dyno figures - Hartech got 351bhp and 332lbs of torque. It’s above 300lbs from 2,900 - 6,100. A standard car max torque is about 260lbs to put it in context.
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Mad Mark911
Silverstone


Joined: 16 Dec 2011
Posts: 127
Location: Maidenhead


PostPosted: Thu Aug 01, 2019 10:51 am    Post subject: Reply with quote

Ghianightmare wrote:
In Holyhead waiting for the ferry - a fantastic drive through Wales - there just isn’t a bad road here. I’m loving the car even more - the power is so useable - it will pull from 2000 rpm in 4th with ease.

I just checked the dyno figures - Hartech got 351bhp and 332lbs of torque. It’s above 300lbs from 2,900 - 6,100. A standard car max torque is about 260lbs to put it in context.


A healthy increase in standard power and what a whopping increase in torque! No wonder you're pulling higher gears and marvelling at the flexibility. Of course after 2,000 miles and the oil change it will have fully bedded in and probably feel even better! Thumb
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