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Hot!highly modified 1986 951

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PSH
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PSH PCGB Member
2020/04/08 12:21:57 (permalink)

highly modified 1986 951

Hi guys
 
I thought that I had given details of my build in this section before but seems either I didn't or it got lost? so to help support the modified forum I'll give some details of this beast.
To cut a long story short my 944 Turbo has been in continual development since 2000 and hasn't stopped... in the last week only the car has had much larger injectors fitted and had it's Vitesse ECU jumpers switched to match the new mod (still have two setting to chose from if more power is desired, i thinkthat i have enough for now..:)...this car is way north of 400BHP and has been so for a very long time. Its reliability is amazing, it's driveability is amazing and its performance is.. well amazing just doesn't give it justice.
To save me writing a long list I'll copy/paste what I wrote when the car was 368bhp and i was begining the build to take her over the 400bhp mark... details of the build are in the 944 forum, you will need to search as it's been a while since I last posted on the thread. try searching 'Building a 400bhp' to find it if you wish to see what I did nearly 6 years ago when building the engine for the extra power sought.
 
Here's the introduction:
 
2

Building a 400bhp+ 2.5 ltr 944 Turbo

Good day all


Well I've been threatening to do this for a while so about time I got started, I will give advance warning here that this build will not be a quick build, as well as the car I'm also in the middle of major house renovation and garden landscaping, plus my main hobby of live steam model engineering , they all take up valuable time which when you get to my age ( 52) you start to realise that you just don't have enough years left to do all that you wish, so although I'm stating my planned route of build here things may and probably will change along the way. First, a little history of the car spec to date, I think most here know now that on a good day my car had a power output of 368 bhp and 382 lb torque at the flywheel, rear wheel figure was 326 bhp. She did as some here will know loose some power in more recent times which stumped me for a while but eventually I found the cause which was due mainly to my lack of understanding on valve movement/hydraulic tappets and nothing to do with the car or it's components, I won't be making the same mistake again..:)

The car is a 1986 model that I've owned for over 14 years and like most started off with light mods that progressively grew.

First mod (1998) was a Lindsey boost Enhancer, not a real power gain but it felt quicker

Next (2000) was a Lindsey dual port wastegate with manual boost controller, this was then mapped on a dyno by Wayne Scofield, resulting power 282bhp/282torque.

Followed by (2005) 368bhp/382torque

So what do you need to make a reliable 368 bhp

Block remained standard, it's an 86 car that means forged internals and crank designed for over 500bhp, later cars used the same crank but not forged components.
Lindsey Stage 2 Head with ceramic exhaust coating and machined valves for greater flow, all ports polished and map flowed.
Cometic head gasket
Lindsey Super 61 Turbo
Siemens 55lb injectors
Lindsey Dual Port wastegate
New standard Hydraulic Tappets
Manual boost controller
NGK Iridium Plugs
Magnecor 8.5mm Red Leads
150mm K&N cone filter
Vitesse MAF with piggyback system
Intercooler: standard
Bailey Motorsport DV30 re-circulating valve
Exhaust: standard
silicone vac lines
Innovate Air Fuel Ratio meter/gauge
Adjustable fuel regulator
8 Hours mapping on a dyno at Chip Wizards Rochdale by the maestro himself Wayne Scofield. Car was set to run on 95 RON ( for safety) at 17psi. For those not in the know for every extra RON, grade used, you can safely increase the boost by 2 psi, so if I had requested the car set for 98 RON the boost could have been increased to 23psi and be just as safe, or so the theory goes, of course, the power would have been a lot higher, back then I was a little scared of going to far, so played safe, today I'm far more confident in the engine's capabilities although I still do not intend to use all of the boost available.
Note: If I've forgotten anything I'll add it later

Now before I get started on the new build some things were added to the old spec but never put on a dyno to remap.

Janspeed twin rear exhaust section
Piper Ram intake system, custom install
Apex-i AVC-R electronic boost controller
Engine loom fully rewired using Lindsey components and covered in 1200 degree sheaving.
All sensors renewed
Dump to atmosphere Cosworth type dump valve
Stepper motor boost gauge with record
89' Turbo gearbox with LSD

I think that's covered most of it, I haven't gone into brakes and suspension, I think this intro is long enough I don't want to bore you guy's on the first page now do I...:) I will add though that as far as bodywork is concerned the car remains standard.

Ok, so plans for this build, first stage, items marked with the star already acquired

Block: bored/skimmed out to 101mm *
Con-rods to remain unchanged although will be checked for balance, whilst researching the options the general consensus is that you can't beat the original Porsche forged items as used for the Turbo cup cars. As a point of interest I've read that the 83 N/A 944 has the same rods, strange.*
Pistons: IASA 101mm full race spec forged pistons with extra machined grove below the first ring, this allows a far higher boost without risk of blow by past the rings.*
IASA gudgeon pins*
Crankshaft machined undersize 0.25mm , both main and rod journals*
Raceware Head stud kit*
Raceware Main stud kit*
Raceware rod stud kit*
Genuine Porsche 0.25mm oversize Main/rod bearings*
Crankshaft scraper*
replace, oil pump/water pump/belts/tensioners/pulley's
Lindsey lightweight billet flywheel
Lindsey stage 2 clutch, 6 paddle
Speed Force Racing Stage 2 large intercooler
Speed Force racing oil cooler
Lindsey stage 2 head, rework valves to F1 spec hemisphere profile
Lindsey Turbo super 61 rebuilt
Vitesse + V-flex MAF for ignition timing
3" custom made Magnaflow free-flow exhaust including the all-important turbo downpipe*
Of course, a lot of what is already on the car will be reused after a good clean or rebuild where needed
last but not least the all-important remap, by Wayne of course '
 
the above was written 8 years ago... gulp!
 
Has this journey reached it's a goal yet?... I doubt it, after all 'modifying is in my soul' although these days I let me son do all of the work.  It was he who fitted the new injectors, a 60th present to me from my 5 children. He also fitted a new performance fuel pump with an extra relay, new fuel lines over the exhaust manifold, replaced all belts, complete service, rebuilt the power steering pump ( the car has never felt so good in the steering), smoothed all the boost pipework and inlet manifold which were then painted in an epoxy chrome finish paint. As mentioned he switched the jumpers on the ECU and also remapped the car to remove a slight low down flat spot that it had developed recently. Evidently this involved some redlining to check he was happy with it, 7k rpm gear changes is not something that I usually do, he seemed to love though, as did the car...:)
 
Anyway, hope some of you find this of interest,  a couple of pictures
 

 

 
Pete

944 Turbo......was 368BHP/382Torque.... now more...

9 Replies

carreraboy
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carreraboy PCGB Member
Re: highly modified 1986 951 2020/04/17 09:15:39 (permalink)
Thanks for sharing, looks fabulous .... keep us all updated please.

Club Member since 1973
41, 911 to date 2.4E to GT3
Modified Register Secretary
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Meisho
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Meisho PCGB Member
Re: highly modified 1986 951 2020/04/19 16:18:33 (permalink)
Wow that’s nice Pete!
 
How long have you owned the car?
PSH
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PSH PCGB Member
Re: highly modified 1986 951 2020/04/19 22:18:32 (permalink)
Thank's guys.. I've owned the car for 21 years..
 
Cheers
 
Pete

944 Turbo......was 368BHP/382Torque.... now more...
carreraboy
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carreraboy PCGB Member
Re: highly modified 1986 951 2020/04/20 12:13:27 (permalink)
Hi Pete, can we lift your fabulous account and feature in a future Porsche Post please?

Club Member since 1973
41, 911 to date 2.4E to GT3
Modified Register Secretary
- 1 - RSRTC🐿
PSH
PCGB Member
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PSH PCGB Member
Re: highly modified 1986 951 2020/04/20 12:49:39 (permalink)
carreraboy
Hi Pete, can we lift your fabulous account and feature in a future Porsche Post please?


You are very welcome to sir, be advised that I let my membership lapse a few years ago... nothing against the club which I joined when I bought the car and had many fun times, just me retiring due to ill-health forced me to look closer at my finances... Hopefully, I'll be able to rejoin one day. 
 
There is also a build log of what work was involved in building this engine on the 944 forum, please feel free to use anything you feel appropriate, the article is currently on page 1 so easy to find.
 
Kind regards
 
Pete

944 Turbo......was 368BHP/382Torque.... now more...
PSH
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PSH PCGB Member
Re: highly modified 1986 951 2020/04/20 14:42:48 (permalink)
Meant to add..if you want pictures of the engine I have a few...in fact just shared a memory on my facebook page as it showed the engine from 5 years ago before going back into the car.
 
Cheers
 
Pete

944 Turbo......was 368BHP/382Torque.... now more...
PSH
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Re: highly modified 1986 951 2020/04/23 10:32:49 (permalink)
A picture at a Dyno day many years ago, not sure exactly where this is? back then results were logged and recorded regularly and then put on the UK 944 league, the info is still available online. Mind you my car has moved on a very long way from those days of 368 bhp. They were fun times though, in today's dark times, I'd settle to just being able to get out and drive...:)
 


944 Turbo......was 368BHP/382Torque.... now more...
PSH
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PSH PCGB Member
Re: highly modified 1986 951 2020/05/23 10:00:04 (permalink)
carreraboy
Hi Pete, can we lift your fabulous account and feature in a future Porsche Post please?



Hi Des
 
To update my previous reply, I have now rejoined PCGB, My new car insurance as of yesterday required me to do so, so I'm back in the fold...:)
 
Cheers
 
Pete

944 Turbo......was 368BHP/382Torque.... now more...
PSH
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PSH PCGB Member
Re: highly modified 1986 951 2020/05/30 16:09:12 (permalink)
Hi All
 
I was digging around for some old paperwork today to answer a question re 'intercoolers' on the 944 forum and came across my dyno run from 2007. I thought that I would share it here, this is when the car was producing 368bhp at the crank. With the new mods, most of which are listed in this thread I'd give today's power output a conservative 400 RWBHP. There's more to come if I decided to go further but I think this is enough for me . One day I'll get Wayne to work his magic again and see just how far we can push her safely.... I still have two more settings to chose from on the ECU which gives a more aggressive timing, currently she's at the lowest/safest setting.
 
Anyway, here's the graph from 13 years ago..she was running at 19 PSI for this run, today she runs at 23PSI
 

 
Regards
 
Pete
 
post edited by PSH - 2020/05/30 16:10:16

944 Turbo......was 368BHP/382Torque.... now more...
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