Quote:
Originally Posted by Ds3ire
More boost at lower RPM with a supercharger. A turbo has to spin up to speed so you get boost higher in the rev range...
My 2c
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I feel that was more of an issue with older engine technoligies. With the 86 "turbo lag" is greatly reduced thanks to:
· Higher compression ratio motor
· Dual intake and exhaust active valve control systems, aka vvt;
· Direct and Port Injection;
· Optimal turbo location; and
· Flexibility of turbine housing A/R sizes.
Using these graphs as an example. All I can see is that the SC makes LESS top end power and it takes longer to get to that peak power which makes it look like there is less lag.
I have seen this consistently when comparing various SC and Turbo kits. The turbo always seems to have more area under the curve throughout the rev range and then more at higher RPM's.
Revolution Performance Turbo
Vortech Supercharger
It just seems far more efficient to use a turbo if this is the case. What a lot of these tuners do for the turbo kits is get the turbo to come onto power ASAP. With that in mind, a turbo could quite easily be tuned to have that linear powerband that the supercharger has. The reason this isn't done often is because as I mentioned, people want as much power as possible low down in the rev range.
Quote:
Originally Posted by sav
Well, RGM got an excellent reputation and you know there is always going to be decent support. If they had gone the turbo route I'm sure most would have been running turbos now and not SC.
As far as I'm concerned they're one of the very few I'd trust to install and support a FI system in SA. Heard of blown motors, crap backup support, zero experience, etc from some of the others. I'm not going to hand R80k over to somebody to "wing it".
Only other one I'd trust is Auto Sound Engineering who's developed their own turbo system. As for the rest - zero chance.
That being said, I also prefer the power delivery of a supercharger, it's very linear with instant throttle response - very much suited to the 86.
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I hear what you are saying, RGM is traditionally a SC based company, so it would make sense for them to go that route, especially when taking into account supplier relations etc.
Having said this, at the end of the day is is still a boxer internal combustion engine and a lot of the Subaru shops would feel quite at home with it. Yes, its more complex with its extra set of injectors and high compression. I would personally much rather take my car to a workshop that has been dealing with Subaru motors for years.
I feel that there is this general feeling of anxiety in SA about local companies supporting these cars. If you have a GOOD tuning shop that knows what they are doing, you shouldn't have any issues.