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Old 08-10-2004, 09:24 AM   #11
Scooby Specialist
Member#: 40501
Join Date: Jul 2003
Location: Paris, FR
2005 Decathalon 21sp
One WheelSeanPower


After I wrote that, I guessed that was the reason. I've been on the BIG turbo diet for so long, where you will do ANYTHING to get some real boost at low revs when putting that I didn't really think of life sans lag. In fact, when I was vf34 bound, I did the same thing, even on OLF - I started scaling boost from 10psi at 30% TPS to 20psi at 80-100%.

On this beast of a turbo, boost comes on FAST...

...once you're over 4.5K revs.


Originally Posted by ride5000
sean, perhaps it's the stock turbo, but i found it actually made driving around town difficult. i'd start from a stop light, for example, with a normal take off. probably light throttle to 2k or so, clutch slip into first, then giving it a bit more gas, perhaps 20 percent or so.

with the MBC only, suddenly i'd get a huge torque bump as the turbo spooled up, which was around 4k. throttle hadn't changed at all, but suddenly i was accelerating much more rapidly, and it made driving slowly (ie, past a peace officer) much more difficult.

it wasn't dangerous, since i did have OLF turned on. in fact, it was the reason i went to the OLF fuel map! but it was annoying. perhaps i could have trained myself to drive around it, but it was strange to have the turbo come on when IT wanted to, rather than when *I* wanted it to.

i guess my big complaint was in power modulation, which i found much more difficult with just the MBC. i would think that with a big honkin turbo that didn't spool up until much more air was pumping through it, the problem would rear its head much less often, and would therefore be much less of an issue when putting around town.

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