b@@sted_fd

by that i mean with the sequential twins there is zero lag and they are better for city driving aswell as a road course in my opinion because of the resposiveness out of the corners. a single is better for the dragstrip and you'll make more power with a single... it's a toss up and it depends on what your looking for i guess

kahren

yea, if u can shell out the money to get a new or close to new setup of the twins you are right, but its gets very expensive to replace many of the unreliable things of the sequential system that make it unreliable with age. small single is very nie on the road corse, u are also at the 4500 rpm range sometimes in teh corners, but anyone who road races their car should know and expect to be a slight dip at that stage.

XXXRacer

I'd suggest you go single and junk the twins

If you want the quick spool I'd suggest the Izuma rx6,

its a ceramic ballbering turbo the spools just as quick as the twins with better top end.

It also gets rid of some potential headachs downs the road. like having to figure out which vaccum line is lose, cracked or broke. Going single cleans up the engine bay and eleminates some moving parts i.e. things that can break and as you already know break expensive as you already know

Another good quick spooling turbo is the gt 35/40. Unless your heart it set on keeping th cool sequentials get a relitively small single like the two listed and you have the best of both worlds... more reliability and more power all over the powerband.



disclaimer!!! I have an Apex rx6 on my fd and am very happy with it over 40k and no problems

just my two cents



XXXRacer

kahren

a gt35/40 is nto a quick spooling turbo.

XXXRacer

oops ment gt 35

crack head alert

Danno

OK, I got the old set of turbos out today. WOW, the exhuats side of the turbos is destroyed, it has like a 1/4 inch crack in the one part. I will take pics. Also the front turbo's turbine was chewed up really bad. I woulder how much that effects the spool up. I had oil just pooring out of the intake sides. That was interesting considering that the shaft play is not very bad.

On top of all this I found what I think is a sensor, (disconnected). It was missing parts to it also. It was attatched to the LIM at the very top of it. Does anyone know what this is, it has an electrical connector and a vacume line attached to it. It obviously did not effect much because it has been like this since I owned the car.

maxcooper

The sequential twins are great for autoX and street driving, where really low RPM response is of primary importance. But it can be difficult to get reliable and consistent performance from them. A big power boost from the secondary turbo coming on in the middle of a corner on a road course is hard to modulate, too. Boost creep can be a problem on some cars with the twins and open exhaust, but enlarging the wastegate or keeping some restriction in the exhaust can keep it in check. Singles can make more power at the top end and give a smoother (i.e. transition-free) power curve, but they do give up some low end (even the small ones like the RX6). It is easier to get consistent performance (consistent boost, no transition weirdness) out of a single, too.



The Isamu RX6 has stainless steel ball bearings, not ceramic.



-Max

Danno

I am looking for a responce to this post. thanks