10-08-2020, 04:35 AM
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#81
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Registered User
Join Date: Jul 2011
Location: Richmond, VA (The Fan)
Posts: 978
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Quote:
Originally Posted by Van914
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Wow super similar widebody design that he’s working on right now. That’s a dream build. Definitely working with a different budget...
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1997 Boxster 4.2L Audi V8 Bi-Turbo
2003 911 C2
NASA HPDE Instructor
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11-16-2020, 05:14 AM
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#82
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Registered User
Join Date: Jul 2011
Location: Richmond, VA (The Fan)
Posts: 978
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Progress continues, I'll post later on the hardware progress. In the meantime I've tackled the gauge problem. The stand alone computer won't be able to talk to the Porsche gauges so I made a digital dash using realdash and an iPad that sits behind the factory cluster. Checkout the youtube link below of it in action
Video of the gauge in action
https://youtu.be/xPJ0kvIynyk
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1997 Boxster 4.2L Audi V8 Bi-Turbo
2003 911 C2
NASA HPDE Instructor
Last edited by truegearhead; 11-16-2020 at 05:53 AM.
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11-16-2020, 06:30 AM
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#83
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Racer Boy
Join Date: Sep 2015
Location: Seattle, WA
Posts: 946
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Wow, that's awesome!
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11-16-2020, 02:49 PM
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#84
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Registered User
Join Date: Aug 2020
Location: Virginia
Posts: 11
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This is such an awesome build, do you ever bring it to c&c?
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11-16-2020, 04:22 PM
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#85
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Registered User
Join Date: Jul 2011
Location: Richmond, VA (The Fan)
Posts: 978
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Quote:
Originally Posted by 804_boxster
This is such an awesome build, do you ever bring it to c&c?
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Thanks! Pre-covid I was normally there with my 911 but I plan on bringing the Boxster this summer (maybe on a trailer, I’ll be that guy). Let me know when you’re going on all I’ll meet you there if I’m not on baby duty (or if I am on baby duty and have finally have replaced my non-baby friendly straight pipes on the 911).
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11-19-2020, 12:03 PM
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#86
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Registered User
Join Date: Jul 2011
Location: Richmond, VA (The Fan)
Posts: 978
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1997 Boxster 4.2L Audi V8 Bi-Turbo
2003 911 C2
NASA HPDE Instructor
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11-23-2020, 10:17 AM
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#87
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On the slippery slope
Join Date: Mar 2014
Location: Austin and Palm Springs
Posts: 3,794
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Definitely a FrankenBoxster
Very cool!!!!!
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2004 Boxster S 6 speed - DRL relay hack, Polaris AutoTop DIY
2004 996 Targa Tip
Instructor - San Diego region
2014 Porsche Performance Driving School
2020 BMW X3, 2013 Ram 1500, 2016 Cmax, 2004 F-150 "Big Red"
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11-23-2020, 03:44 PM
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#88
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Registered User
Join Date: Sep 2017
Posts: 85
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Damn, just catching up on this, epic build!
Don't see many details re the engine swap. Which Audi V8 did you go with? What turbos? What management? I imagine you are also upgrading internals on the engine before going forced induction?
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11-23-2020, 04:51 PM
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#89
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Registered User
Join Date: Jul 2011
Location: Richmond, VA (The Fan)
Posts: 978
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Quote:
Originally Posted by 1thenaton1
Damn, just catching up on this, epic build!
Don't see many details re the engine swap. Which Audi V8 did you go with? What turbos? What management? I imagine you are also upgrading internals on the engine before going forced induction?
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Engine: I’ve changed up the engine three times, sent one engine back and still have another sitting around but settled on an Audi ABZ 4.2l V8 which if I hadn’t already changed my mind so many times I would have moved onto a different platform. The ABZ bolts up to the Boxster trans which is nice but the real benefit is that it’s an incredibly short motor (same length as the Boxster flat 6 so it actually allows the trans to sit in the factory location. With the trans in the factory location you don’t have weird drive axle angles which is a big problem on a track car. The problem with the motor (I now know) is that forged internals are all NLA so for now it’ll be stock. People run stock internals up to 1,000hp so I don’t think my goal of half that will be a problem...we’ll see.
Engine management: I’ve also changed this up three times too starting with a reflashed stock Audi ecu, then mega squirt which I just sent back, now I’m waiting on a VEMs ecu which is being baseline tuned for my setup and they’re making a harness for me (totally plug and play besides three wires to connect to the boxster..how cool is that!). The companies called EFI Express, awesome guys!
Turbo’s: I just received the turbos this weekend. I ordered the smallest S200SX-E turbos they sold from Borg Warner but they shipped me the largest S200SX-Es so I’m not sure if I’ll return them or change my approach a bit. I’m targeting 520hp for now at 8psi. If I can find internals (or have them made) the turbo, fuel and cooling setup will take the engine to 800hp. I hope Im never stupid enough to try that.
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11-24-2020, 06:45 AM
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#90
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Registered User
Join Date: Dec 2016
Location: Clifton, NJ
Posts: 1,135
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you are gonna run the stock 5 speed with 520hp?
How many do you plan to replace per event?
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11-24-2020, 07:03 AM
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#91
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Registered User
Join Date: Jul 2011
Location: Richmond, VA (The Fan)
Posts: 978
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Quote:
Originally Posted by Quadcammer
you are gonna run the stock 5 speed with 520hp?
How many do you plan to replace per event?
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I'm hoping easy shifting and no launches and a cooler will get me through an event or so, I'm sourcing an S transmission to replace it.
I have a feeling this whole thing is going to look like the BluesMobile in the final scene. But hey...we’ll see. At a minimum you all will get a good laugh when everything explodes.
__________________
1997 Boxster 4.2L Audi V8 Bi-Turbo
2003 911 C2
NASA HPDE Instructor
Last edited by truegearhead; 11-24-2020 at 10:10 AM.
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12-09-2020, 03:17 AM
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#92
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Registered User
Join Date: Jul 2011
Location: Richmond, VA (The Fan)
Posts: 978
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__________________
1997 Boxster 4.2L Audi V8 Bi-Turbo
2003 911 C2
NASA HPDE Instructor
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12-09-2020, 04:31 AM
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#93
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Registered User
Join Date: Jul 2011
Location: Richmond, VA (The Fan)
Posts: 978
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Oops looks like I posted the same photo twice, here's the correct one
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1997 Boxster 4.2L Audi V8 Bi-Turbo
2003 911 C2
NASA HPDE Instructor
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12-09-2020, 05:54 AM
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#94
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Motorist & Coffee Drinker
Join Date: Jul 2014
Location: Oklahoma
Posts: 3,737
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It's all awesome! I think it may be about time to change your signature:
Quote:
1997 2.5 Boxster NASA Time Trial track car
2003 911 C2
NASA HPDE Instructor
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I was talking with one of the GRM guys in person (pretty sure that it was 'Stafford1500') about boost with the Audi 4.2s. He mentioned changing the head gasket to adjust the compression. I don't remember the details, but I think that he recommended a thicker gasket to slightly reduce the compression. If you are boosting a stock 4.2 now, you may want to look into that for when you build up the replacement engine.
There may be a few guys on the AudiWorld Forums that have the forged internals tucked away. "audinutt" offered me a set about three years ago, but at the time I didn't plan to tear down an engine. It may be worth asking. If they see your build they will probably be happy to help out.
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I am not an attorney, mechanic, or member of the clergy. Following any advice given in my posts is done at your own peril.
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12-09-2020, 06:20 AM
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#95
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Registered User
Join Date: Jul 2011
Location: Richmond, VA (The Fan)
Posts: 978
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Quote:
Originally Posted by 78F350
It's all awesome! I think it may be about time to change your signature:
I was talking with one of the GRM guys in person (pretty sure that it was 'Stafford1500') about boost with the Audi 4.2s. He mentioned changing the head gasket to adjust the compression. I don't remember the details, but I think that he recommended a thicker gasket to slightly reduce the compression. If you are boosting a stock 4.2 now, you may want to look into that for when you build up the replacement engine.
There may be a few guys on the AudiWorld Forums that have the forged internals tucked away. "audinutt" offered me a set about three years ago, but at the time I didn't plan to tear down an engine. It may be worth asking. If they see your build they will probably be happy to help out.
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This is one of the reasons I went to e85, e85 has almost 3 times the evaporative cooling and reduces the detonation for high compression motors so there's no need to reduce compression. I also had EFI Express put the whole plan together, they have a tremendous amount of knowledge turo'ing these motors so I basically just returned everything I bought and bought their recommended setup.
Thanks for letting me know about the forged internals tucked away! I'm reaching out to them right now and will report back.
__________________
1997 Boxster 4.2L Audi V8 Bi-Turbo
2003 911 C2
NASA HPDE Instructor
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12-12-2020, 05:09 PM
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#96
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Registered User
Join Date: Jul 2011
Location: Richmond, VA (The Fan)
Posts: 978
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__________________
1997 Boxster 4.2L Audi V8 Bi-Turbo
2003 911 C2
NASA HPDE Instructor
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12-12-2020, 05:21 PM
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#97
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Registered User
Join Date: Jul 2005
Location: MA
Posts: 882
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Any concern with the rearward swept angle of the rads creating lift as the air goes down through them, or does the wheel well turbulence negate it?
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98 Arena Red 986
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12-12-2020, 05:39 PM
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#98
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Registered User
Join Date: Jul 2011
Location: Richmond, VA (The Fan)
Posts: 978
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Quote:
Originally Posted by Stroked & Blown
Any concern with the rearward swept angle of the rads creating lift as the air goes down through them, or does the wheel well turbulence negate it?
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So I’ll have to admit I really have no idea... look worst case I’ll add some angle of attack to the rear wing. The Front fenders stick out further than rears so it won’t be getting a ton of airflow. Good point though.
__________________
1997 Boxster 4.2L Audi V8 Bi-Turbo
2003 911 C2
NASA HPDE Instructor
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12-13-2020, 07:54 AM
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#99
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Racer Boy
Join Date: Sep 2015
Location: Seattle, WA
Posts: 946
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Quote:
Originally Posted by Stroked & Blown
Any concern with the rearward swept angle of the rads creating lift as the air goes down through them, or does the wheel well turbulence negate it?
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That isn't an issue. The air exiting at an angle doesn't generate lift or downforce.
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12-14-2020, 04:51 AM
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#100
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Registered User
Join Date: Jul 2013
Location: Bastrop, Tx
Posts: 2,643
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Was this car a base or S originally? The S came with bigger coolant tubes from the back to the front.
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Woody
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