dont know why this question keeps coming up. TS works for improving low end response. For all out power the single scroll kits still win. dont know how many times I have said for FR to send buschur a TS 35r setup to test on daves white car. the bottom line is there is no TS setup on daves car. he has tested plenty now and knows what they are capable of doing.

this thread = HUGE FAIL

 

Specifically which sizes and configurations were included in the testing?

Secondly, I feel it's just a little bit of a stretch to suggest that any single individual's car is a magic one-size-fits all model that cannot be improved regardless of the intended use, and perfectly satisfies everyone's personal priorities and individual tastes.

 

Your credibility is in question I think as a Evo guru when you sent my buddy a Evo cylinder head with DSM springs in it a couple years ago Do you build engines with a blind fold on for fun?

So 94AWDcoupe, you don't think Dave's RS could make the same power but spool sooner in a twin scroll configuration? I'm not really qualified to have an opinion on it but I would like to see more testing which is why I'll put up a little money to see it.

 

I didnt install those springs. They were installed at machine shop that was doing fresh valve seats. I dont think anyone would have noticed lack of clearance just by glancing at it. I dont have creditably problems with normal people. I could care less what you think. you are the biggest Fail on here.

Daves RS will not make more power on TS 35R. Its possible it wouldnt even spool faster. The setup is tweaked for high HP around the free flowing hotside. Adding back pressure with TS setup would be a huge change when only a small change is needed to kill a significant amount of HP.

If you wait patiently for the Full-Race testing you will learn from the results. they are planning to log back pressure.

 

It will be interesting to see how back pressure is effected. Hope the Full-Race test happens and is done well.

 

Mike what is your train of thought that makes you think its obvious subies benefit whilst evo's do not?


Scorke

 

Buschur doesn't make his own manifolds.... there used to be a Full-Race manifold on his car whilst he was still selling/running shearer manifolds on all the other cars, I wonder why?

Probably because it was poorly designed and engineered.

Scorke

 

You draw the wrong conclusions. he always stocks and sells the highest power mods that work. So ask yourself why he doesnt sell Full-race? the full-race manifold he was using at the time was experimental. and definitely NOT TWIN SCROLL which is what this thread is about. not which single scroll mani works best.

 

The issue of the slow 4-cyl pulse time plagues the Subaru just as it does the EVO, but the Subi's problem is compounded by long runs of exhaust primary from the head to the turbo. This reduces exhaust pulse energy to a greater extent, and TS should provide an even greater advantage.




We've seen a GT40R generate 750+whp with a TS T4 .95 A/R. We've seen a GT42R generate >1000whp with a TS T4 1.15 A/R. And we've seen a 1.5L motor with TS that whipped out 1300+bhp.

The question isn't if TS can generate impressive power. That has already been proven and cannot be debated. The question is if a TS housing sized to reach a certain peak power figure (i.e. for advertising purposes) retains most of the benefits of TS. That is something that must be evaluated by a human driver, on the street. It should be noted however for those who are dazzled by racing and dyno plots that the greatest average power trumps the greatest peak power when the rubber hits the road, every time.

 

higher average, lower peak is what its all about

ouch! lol

 

my theory is that if twin scroll is going to spool sooner its also going to sign off in the rpm sooner, which is what most people want i guess, but not all. Some want there power bands lasting till 9000rpm+ so they can pull thru the traps in 4th for drag racing etc...