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GT2EvoGuy GT2EvoGuy is offline
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Join Date: Jun 2008
Location: Connecticut
Posts: 121
Garage
Well everyone,

Back on the dyno today with the 4094r with the intercooler cleaned out and new spark plugs. And......still down 40whp versus my old turbo

My shop tells me that the 4094r produces identical results as my non BB T66 hybrid turbo up until 4500rpm, at which point my old turbo starts to significantly outperform the 4094r. I really don't get it...the 4094r flows 850hp so I cant understand why the top end is suffering Maybe this turbo isnt quite as efficient as my old turbo at relatively low boost (1.2 bar). The M3 guys have used this 4094r to make big numbers (over 700whp at 23psi), so maybe its a matter of this turbo having a bit higher psi "sweet spot".

Tomorrow, they are putting my other turbo back on and redynoing to get me back to the old baseline hopefully. I guess the old adage - if it aint broke don't fix it - applies here.
Old 09-22-2008, 03:53 PM
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