ah missing key point…making that GC8 put down 800whp for more than 1/2 lap w/o blowing up. The cosmos have not been kind to the subarus as of late. I’ve built 3 motors in the past couple months and have 6 possibly 7 more on tap over the next 2-3 months…
I’ve got a better idea for the GC8 power plant wise just gonna keep it to myself until it happens. Still brutally fast, just way more reliable.
I could mate a 2.1L 10 valve audi I5 into a GC8 that would make 800hp and sing to 10K rpms all day long without hesitation or reliability issues whatsoever. Compared to 4G63 and boxer builds, the I5’s are my next song and dance motor. If the EG33 in my kit car ever blows up I’ll be putting one on there.
the motors?..dood I can get the 10 valves all day long. JVG’s got a spare sitting at his palce right now. The 20V DOHC motors that came in the Quattro Sport are a tad more difficult to find, but not needed in reality. I’ve build a handfull of 700hp 10 valves before. Nothing to it really. They’re cheap too…
M50-based motors are Germany’s LS1, and, if you listen to people on this forum, the LS1 is the greatest motor ever. Ergo, the M50-based motors are the greatest motors ever.
I am calling shenanigans here. The 10v is one of the worst flowing heads audi/vw ever built. Its essentially the counter flow 8v with an extra cylinder. These motors make ok power at reasonable rpm and boost. To get the performance you are talking about would require radical headwork, cams with a huge turbo leaving you with a tiny usable power band. The cost to do the work would easily exceed the cost to upgrade to a 20v setup.
I’ve build a handfull of 700hp 10 valves before. Nothing to it really.
034 pulled basically every trick in the book to make 700 wheel on a 20v at 40psi out of a GT4202RS. You claim 700 on a 10v with nothing to it? Sorry I’m not buying it.
Hey you’re entitled to your own opinion and I really don’t want to start a worthless fight here with ya but certain things just need to be said so I’ll just keep this as short as possible. I’m sure Jesse is going to chime in here and tell me to shut my mouth for better business but…
We’re not talking reasonable boost, we’re not talking reasonable RPM’s either. This is not your street car thread and neither were ANY of those audi motors built. Not even remotely close. The only asphalt they ever saw was the 1000 some odd miles of it out my trucks’ back window on the way up into Canada.
This thread was about TA vehicles. G-frame spool, huge boost, excessive RPMS, WOT 95% of the circuit. Narrow power band suits just fine.
As far as cost goes…cost is nilch when I do every bit of the work myself, and I mean every bit of it from Solidworks CAD design and flow testing to the machine work itself. Set aside the electric bill to run the machines and core materials, it only costs me my time when working on my own projects(AKA what’s going on here in this thread) Hell if I wanted to design and mill a core billet CNC’ed head I could do that as well. Now I have yet to have a customer ask me to mill a billet flowed head for an I5, but you seriously don’t seem know what I’m capable of here with a person with a big enough wallet are ya? I sure as hell didn’t build my business to where I am now making discussions up.
And Dahlback pulled 920ish out of his RS1 running a massive KKK/Holset hybrid. 42R in the hill climb world is not that big. 034 is working off OEM engine rod ratios/lengths, piston compression heights, etc. Things that, when altered, can change how and where a motor builds power quite drastically. The I5’s I’ve built are offset ground crank(stroked)2.2 gone to 2.4(2.46 IIRC), long rod/low CH, and dry sumped. Yes CNC ported, yes big custom Ferrea valves, yes customer camshaft(CCC thanks). Mahle 7.0:1 pistons. Two of the turbo setups that I built for said motors were running Holsets HX80s(same CHRA Dahlback used, gasp) in the 3.5-4 PR range. TSD and HC comp tube chassis cars in Vancouver and Nova Scotia events, and using proprietary OBR hardware and software. One was eventually converted to alcohol or methanol soon there after. At the time of the build 20v were exceedingly difficult to locate, both stateside and overseas. It wasn’t a matter of cost as Robert and Don have plenty of cash. It was time and availability.
Oh did I mentioned I built part of one of the said tube chassis as well…guess I can’t do that here either.
Just because you don’t read about it in Eurotuner or see it on the net doesn’t mean it’s not out there. I didn’t think the big power could be made out of those rinky little Honda motors until Synapse rolled into town…sure as hell floored me when it was done…