Quote:
Originally Posted by OM VT3
Remember they arent using e85 and also havent even turned boost up all the way....Lets first see how long the stock motor holds up because it will only be so long before the rod snaps.
Everyone talks about the area under the curve but what use is it if you cant get the power to the ground correct with the SC setup?
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They're clearly tuning to keep TQ down to avoid over stressing the factory rods. And traction is an entirely separate conversation from the engine performance (see a properly set up suspension, tires, etc. etc.).
And I would be concerned about the rods -- We're talking about an NA, high revving motor that was not designed for boost. By adding twin turbos, we're adding lots of low-end TQ that continues across the entire RPM range. Not a direct comparison, but the Porsche 997.1 Turbo (higher strength Mezger motor) stock tunes around 400 WHP/400 WTQ (TQ is what kills rods, so ignore that HP numbers for now). After upgrading everything, you can get into the 900 WHP area, but you
cannot go above 700 WTQ safely. So the breaking point on a high performance, high quality, racing derived factory boosted motor is double the WTQ.
The E9x M3 M3 stock dynos around 350 WHP/300 WTQ, but like I said when I started, this motor was never intended/designed to be boosted, and I've be very conscious of going above 500 WTQ on stock rods (if not for my conscious, then in fear of the costs and headaches associated with sourcing a new block when something breaks).