New Custom Turbo

[DrWill]

Originally Posted by slicktop

Apparently people race at <3k, news to me!

on course in autocross im generally sitting on 3k-4k at corner exit. could i down shift into the turn? sure. but when you are talking about a 30-40 second course with 6 turns and two slaloms shifting down then up for every turn thats at least 12 shifts in well under a minute even if you are the fastest on your shifter in the world its going to eat up at least a second in a race that is decided by thousandths of a second. not to mention that on an autocross course by the time you upshift its already time to down shift again if you're going to so whats the point. so yeah people race in that rpm range. and having a setup which puts a good amount of your boost on by 3k is useful. that being said i took a ride with fabron a week or so ago and was very impressed by the versatility and power delivery of this setup especially when considering the size of the turbo on a small engine. the power was immediate and smooth. there was no characteristic kick in the ass as boost came on there was no low end sluggishness. the torque came on at the low end and boost and power build smoothly throughout. it felt more like my brothers built 383 small block Z28 than a boosted 2.0. i was very impressed with the fabrication and tuning ross did on this project and when im brave/rich enough to put myself in the street mod class i will definitely be seeing him about a system that can put my boost where i need it.

idk ross do you think you can get one of the smaller EFR turbos to make 10 PSI by 3K?

[Ross]

I will need to plot it out. I am sure we could put something together to meat your goals.

[ft_sjo]

I don't think any of the EFR's would be good auto-x turbochargers. Good street, if you buy the smallest one and engineer the rest of the engine properly.

I'd go with a supercharger for auto-x, although the lack of charge cooling due to drive patterns may be a concern! That applies to turbos too, though.