So I've posted here a couple times about turbos and am still fairly indecisive. Im really wanting to do a large single as i think they are cool, and unique. i also have a cam that will be going in after the turbo to help spool it (188/220) which is supposed to be able to spool fairly large turbos. I've asked about running a s464 on here and got a good response but after reading found out that the 464 doesn't often have ett and doesn't flow any more than a s364. so i looked into the s467.7 fmw /74/ .90 t4 and have come across a lot of instances where people say they out spool and far out preform the s366. so I'm curious if anyone has personal experience with one or some insight as a single. I've also considered running this set up with a diverter valve, to help spool. any insight would be appreciated. also another reason i wanna stick single is the fact my cummins is in a chevy and space is limited on that side and switching back to a 2nd gen manifold and flipping it won't leave much room for a second turbo unless i cut out holes in the hood.

 

Why not run a 366?

 

They don't flow any more than a 64, a apparently they are very laggy for a s300 turbo. And since I've heard the s467.7 flows more and spools better id rather go with that and have lots of room to grow. My other option is a s364/71/ and try and get someone to modify a .83 housing to fit the 71 wheel. I just don't know if I'll run out of air down the road and id really prefer to go single and not have to add another turbo. I just don't see many people that have run a 67.7 as a single on 12 valves. On commons they seem fine as singles and better then 366.

 

Where did you get the info in bold? As for the 366 being laggy that is true but still more responsive than the s400 frame chargers. The 467 has been ran on 12 valves before with ok results. I used to run a s466 cast ett wheel 74 turbine .9 housing and it was noticeably slower to spool than my old silver bullet ( which is my favorite turbo for a single). The 466 did make more power up top tho.

 

Mostly common rail stuff. And isn't a 366 only rated at 80 lbs and a 364 is rated at like 81lbs. I have experience with a 64 and it's not laggy at all and that's on a auto stock timing and cam truck. I've just never seen much positive feed back on the 366, especially the 66/74 combo. Maybe with a cam they are faster. It's also very hard to find flow info on 464's and 466. While flow info on 67.7's is very avalible aswell as feed back. Mostly from common rail guys though. I know it's not gonna be a super fast spooling turbo but I'm hoping it would be fast enough with a cam. So at least I have the air later on when I do pump work. Would I diverter valve add even more drivability, like a vgt almost? I've seen a fair amount of positive feed back, and that's on guys running 71's and larger

 

I'm fairly indecisive if you haven't noticed. Just don't wanna have to do a turbo set up change for a while.

 

The 64 is ~ 75 lbs and the 66 is ~82 lbs.

The diverter valve is a very good piece, they really do work well. Just make sure the control line is on the cool side of the IC. What scares me about the diverter valve is when there is a failure is almost guaranteed to over speed the turbo.

 

and now they make a 62/68 fmw that flows 74, why does bd and some other companies say the 64 flows 80? thats what I've seen a lot and i know the 66 flows around 80. i may have found a line for a barely used 67.7 and if its a .9 housing i may just go for it and the money I'm saving i can put towards the diverter. i think it would be fairly easy to notice a failure swell its basically an internal waste gate style. how often do those fail right? bd makes good products.

 

I'm not saying they don't make a good product what I am saying is if the hose fails the valve will instantly go closed, if this happens when you are full throttle you will over speed the charger before you can let off the throttle. As for there flow ratings they are rating there 64 mm wheel at 64.5 mm vs a 66mm wheel. Specs from there site state there 64 1160 CFM and the 66 at 1200cfm.

 

That is very true. Hopefully Murphy's law doesn't get me on that one. I'm still trying to decide between potential twins and the big single. Have you heard anything about the 364.5 fmw that's fairly new. Supposed to spool like a 63/68 and flow like the old 66, something like 80 lbs. the 62/68 fmw also looks promising with 74 lbs of air when the 63/68 only makes 75. Also I don't get why they say the 67.7 makes 95lbs of air, when you look at the map it tops out at 85. Which really doesn't make sense. I know the 67.7 will make tons of power but just confused where people get the 95 from.