Porsche Boxster 986 - engine swap project

Porsche Boxster 986 - engine swap project

Author
Discussion

Hungrymc

6,674 posts

138 months

Tuesday 16th August 2016
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OP, Its an astounding build and you made incredibly rapid progress on the mechanical side. Must be frustrating to be grinding through these electrical issues but you've made terrific progress.

drdino

1,151 posts

143 months

Tuesday 16th August 2016
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Are you sure the ECU is actually compatible with the throttle pedal you have for example? If the TPS has different end resistance values, that would certainly through up related DTCs.

Escy

Original Poster:

3,940 posts

150 months

Wednesday 17th August 2016
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I'm leaning that way, I've done some tests the ECU isn't damaged. I've got VCDS which is the popular VAG diagnostic software, it can log all the sensors, the ECU can read the pedal sensor which is good news but the values are way off. I need to compare the values with my mates S4. Hopefully it'll be something that I can adjust on the software.

superkarl

60 posts

138 months

Thursday 18th August 2016
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The N80 and N249 valve error codes are nothing for you to worry about.

The N75 you need for boost control.

Pretty sure pedal values should just be 0-100.

e46m3c

874 posts

156 months

Thursday 18th August 2016
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great read. look forward to future updates. best of luck smile

VRSMatt

1,923 posts

139 months

Friday 19th August 2016
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Good work....I cant help feel a ford Sigma engine would have been a better choice......

Jez m

813 posts

196 months

Friday 19th August 2016
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Love it! The Boxster Porsche should have made from the factory.

Can't wait to see it finished.


giveablondeabone

5,510 posts

156 months

Friday 19th August 2016
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Just read this from start to finish. I wish I had a 10th of your ability and enthusiasm

I hope the wiring issues don't prove a bridge too far and it's up a running soon

Keep up the good work!

bow

JB!

5,254 posts

181 months

Friday 19th August 2016
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If you ever do another VAG engine swap, ECU immobiliser defeats are cheap and fast, most specialists will know someone who can do it.

Same with your engine harness, I know a few people that can build you a standalone loom to run the S4 ECU off a few feeds on the Porsche fusebox...

ooral

157 posts

223 months

Friday 19th August 2016
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Wonderful work, can't wait to see it finished!

benillsley

4 posts

98 months

Friday 19th August 2016
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Any reason you decided not to go for an after market ECU to run it? Cost? Or just because the standard kit is more than up to it?

Escy

Original Poster:

3,940 posts

150 months

Saturday 20th August 2016
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I'm chuffed to see this build has made it to the front page of Pistonheads, seeing that was a nice surprise. Thanks for that. smile

superkarl said:
Pretty sure pedal values should just be 0-100.
I had a look at my mates S4 tonight and the values are 15% off the throttle and 80% full throttle. I've got a plan on to get this working.

benillsley said:
Any reason you decided not to go for an after market ECU to run it? Cost? Or just because the standard kit is more than up to it?
The development done on the standard ECU is impressive so I don't see much of a benefit in going standalone at this point when you factor in the additional costs, although it isn't something i've completely rule out.

Motorrad

6,811 posts

188 months

Saturday 20th August 2016
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Escy said:
I'm chuffed to see this build has made it to the front page of Pistonheads, seeing that was a nice surprise. Thanks for that. smile
Deservedly so, if it hadn't I'd never have read it.

Thread of the year for me.

SteveTTT

112 posts

137 months

Saturday 20th August 2016
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I've only just picked up on this thread OP, it is just incredible. For the first time in my life I'm going to use "awesome" as the only worthwhile adjective to describe your vision, ambition, prowess and determination. I have no idea what you do for a day job, but if this thread doesn't get you a job offer from Frank Williams or NASA I'd be amazed! Well done Sir, keep it up, can't wait to see the outcome.

Arsecati

2,317 posts

118 months

Saturday 20th August 2016
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Well I'm glad it made front page of PH too - as I've just had a fantastic massive mug of tea sitting down and reading this end to end!!

Superb - that is multiple pint-buying-worthy all day long!

The summer is totally cr@p anyway - I only took my 944 S2 Cabriolet out of the garage last week for the first time in over a year, to try and enjoy a few days of open air fun, it's already ready to go back in again, so don't worry about missing Summer........ there are plenty of clear, bright and sunny days over winter ya know! wink

You can't let it get on top of you now....... you've made front of PH........ now we're all depending on you to get it done!! Hahaha!!!

Just love it, I love the engineering, the logic, the industriousness, the resourcefulness and of course, the epic determination. There will be many out there who just won't get it, who just won't understand why. But they are not people I really have time to be associating with: if they have to ask - they'll never get it.

Like the question as to 'why climb Everest?' 'Because it's there' is an answer that makes damn perfect sense to the rest of us!! wink

Keep it up man, like everyone else, can't wait to hear and see it roar!

anthg100

6 posts

125 months

Saturday 20th August 2016
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Great thread, great build, superb work and engineering, kudos to you sir, very motivational.

I will get around to building something someday, when I eventually get a house which has a nice big driveway and a garage! Until then I'll just keep spending my money on ///M cars and beer, the rest I waste on family, and bills!! Lol

Escy

Original Poster:

3,940 posts

150 months

Saturday 20th August 2016
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Thank you all for the positive comments, I appreciate them, they are good for morale while i'm grinding away doing the boring jobs. biggrin

I recruited some help on the wiring.



The Audi fuel pump relay also provides the power supply for the lambda sensors and injectors, I had these circuits wired up on separate relays but i'm getting a fault code on the fuel pump relay as well as all the other fault codes so have decided it best to re-do it. My mate picked this up for me from the scrappy as I didn't have the foresight to remove it from my A6.


Baddie

617 posts

218 months

Saturday 20th August 2016
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This is a great thread. I'm impressed by the innovation, skills, planning, discipline and, while turbos are not my thing, taste. It must be a bunch of people like the OP building Bloodhound.

Replied for updates.

Mezzanine

9,224 posts

220 months

Sunday 21st August 2016
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Escy said:
I recruited some help on the wiring.
The true brains behind this excellent build are finally revealed!

wink

Escy

Original Poster:

3,940 posts

150 months

Sunday 21st August 2016
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She's the master tech, i'm just the labour.

The Audi fuel pump relay/distribution block fitted a treat on the Porsche relay holder which has helped keep it all neat and tidy. Everything has been wired up.




I got it started. Lots of the fault codes have gone. I've still got a temperature sensor code and the throttle pedal ones but otherwise i'm just left with the ones I expected now that will be coded out. I took a little video of it running. There is an exhaust blow on the v-band from the turbo plus it's in the car port so hopefully it won't be too loud once that's all sorted.

https://youtu.be/32okgq_I2Bg

It made a bit of a mess.