Rotrex Built Engine NB! Come at me bro!
#143
Elite Member
iTrader: (2)
Join Date: May 2008
Location: Portland, Oregon
Posts: 3,468
Total Cats: 365
The rotrex is good for medium-power builds. For a built motor, you cannot beat what the 6258 will give you.
I like what I have, it does what I need it to do, and I have zero fussiness with it. It is reliable trackday FI for me. But when this motor goes, I will be going EFR 6258, or its descendant - might be 5 years for me.
I like what I have, it does what I need it to do, and I have zero fussiness with it. It is reliable trackday FI for me. But when this motor goes, I will be going EFR 6258, or its descendant - might be 5 years for me.
#144
Junior Member
Thread Starter
iTrader: (1)
Join Date: Jan 2011
Location: SoCal
Posts: 101
Total Cats: 4
I'm feeling quite convinced honestly. The cost difference is the only deterring factor for me. Still looking at another $4k to get the engine finished and in the car (including some extra goodies) which is looking like the light at the end of the tunnel.
but to spend another $4k on boost feels like more tunnel
Whats the consensus on running 10.5:1 compression with turbo? It was chosen mostly the combat the rotrex's inherent flaws, but with obviously limited timing and boost would it still be feasible? time to pour through build threads
but to spend another $4k on boost feels like more tunnel
Whats the consensus on running 10.5:1 compression with turbo? It was chosen mostly the combat the rotrex's inherent flaws, but with obviously limited timing and boost would it still be feasible? time to pour through build threads
#153
Supporting Vendor
iTrader: (1)
Join Date: Sep 2010
Location: Lake Forest, CA
Posts: 7,949
Total Cats: 1,003
wait wait wait no no no... in that green area, the Turbo car is STILL making more HP AND torque than the rotrex build. the fact that the rotrex is making more HP than TQ doesn't matter since the turbo build is still higher in both areas. there's not a single place in that rotrex powerband that would be stronger than the turbo. On the graph it shows that under 3.5k rpm the rotrex would be better, but I'm not sure that's accurate (not sure both were being properly measured at that rpm).
#155
Boost Czar
iTrader: (62)
Join Date: May 2005
Location: Chantilly, VA
Posts: 79,493
Total Cats: 4,080
there's not a single place in that rotrex powerband that would be stronger than the turbo. On the graph it shows that under 3.5k rpm the rotrex would be better, but I'm not sure that's accurate (not sure both were being properly measured at that rpm).
Driving in the above turbo car, is such an insanely sick feeling of speed. Sure after you get into taller gears the rotrex will feel the same, but around slow corners or on the street there's no comparison. Plus I wouldn't want to drive that rotrex setup on the street considering how much work most have been done to achieve it...the car would not be street friendly at that point.