Best spooling turbo to date.

[Turbo6Smackdown]

Ok, with the advent of a little better technology here lately, what would be the quickest spooling turbo to date in your guys' experiences. Would it still be stock, because of how lightweight the wheel is, or are these dual ball bearing turbos just as fast now.

 

[Turbo6Smackdown]

Noone knows?

 

[notacarlo]

Almost any of the GT series (standard bearing) spool great. The BB versions of the GT spool even better.

 

[Turbo6Smackdown]

How would you compare that to a stocker? Are the stockers still the quickest? One of my questions is, if you ported out the stock turbo (bellmouthed the compressor housing, right where the inlet bell mounts) threw a kirbans billet inlet bell on, dutt neck on the IC, had 4" maf piping, a 3" downpipe, with no cat, that flowed right into a 3" single shot, with a straight thru muffler, used a manual boost controller, all thru the stock headers. Would this combo fry some 28" tall MT 275 ET street radials?

And if it didnt, could I get away with getting my oem gear ratio back, by switching to a 3.70 rear end gear? I want zero tire spin, but not lose my original ratio, by putting a 2" taller tire on.

 

[bison]

If you have the correct stall and the a/f is right on spoolup with most aftermarket turbos that would be commonly run on the street (6776 and smaller with BB cartridges) will be spooling like the stock one or faster. Anything with a BB cartridge will spool even faster. The stock converter is inadequate for most but would work well with the 6131 BB.

 

[Turbo6Smackdown]

If you have the correct stall and the a/f is right on spoolup with most aftermarket turbos that would be commonly run on the street (6776 and smaller with BB cartridges) will be spooling like the stock one or faster. Anything with a BB cartridge will spool even faster. The stock converter is inadequate for most but would work well with the 6131 BB.

Well I have a 2400 rpm stall in my car as of now. So you think a bb turbo will outspool a stocker? wow, that's just insane. I cant even imagine that. That, plus all the power you'd have up top from one of those 6776's. With the spool rates of these new powerful turbos, does this mean more business for spicer in the near future in your opinion?

 

[bison]

double post

 

[bison]

Well I have a 2400 rpm stall in my car as of now. So you think a bb turbo will outspool a stocker? wow, that's just insane. I cant even imagine that. That, plus all the power you'd have up top from one of those 6776's. With the spool rates of these new powerful turbos, does this mean more business for spicer in the near future in your opinion?

I doubt the 6776 would be ok with a stock converter. The 6131 BB should be though, especially with a Garrett .63 ex. housing. The 6776 BB requires a different stall speed. Compressor surge could become an issue with that wheel combo in a ball bearing cartridge on a small engine like a 231ci. with the small exhaust housing. There is a lot to be gained in almost all applications with todays converter technology.

 

[Turbo6Smackdown]

Well, when I get a few more things done on it, it'll have a blowoff valve, so im not worried about that. So you dont think a 2400 stall with manual boost controller will spool a bb6776?

 

[bison]

Well, when I get a few more things done on it, it'll have a blowoff valve, so im not worried about that. So you dont think a 2400 stall with manual boost controller will spool a bb6776?

The blow off valve might not work well at light throttle openings. They work best with a closed throttle and vacuum behind the throttle blade. The 2400 converter will cause the 6776 BB to be a dog. It might be a little better if you had an old Garrett .63 ex housing on it though.The manual boost controller wont help much if at all. You would need nitrous for it to work effectively. Id go for a high tech converter.

 

[notacarlo]

i know this has been beat to death. Why waste money on a blow off valve? Bison is correct. it will do nothing about compressor stall. They are intended for manual cars because of the boost loss between gears.

 

[86brick]

Probably one of the oldest of the old school turbos, but my brother's previous GN at one time had a TE34 with the Garrett .63 a/r housing and that thing was "instant" with the stock D5 I'm sure with the newer BB turbos it would be much the same, kinda fun on the street but won't help much with traction:wink:

 

[Turbo6Smackdown]

Blow off valves were put on manuals, because they constantly have to get off the throttle. Any turbo car has compressor surge when the throttle is let off. Any car. Blow off valves relieve that. Dont they?
I know many turbo buicks around here run em. And these are experienced tr owners as well.

 

[notacarlo]

It's kinda a to each his own thing I guess. But you said it best, the manual guys have to constantly let off the throttle....well, do that in the 1/4 and your et's suck with an automatic.

I'm not busting on you by any means, It was just an opinion. If a 9 second guy aint running one, neither am I.

I do think that money is better spent elsewhere, but this thread is about turbo's so I will offer my experience. I have a GT6131 with an Orange Stripe converter (3K stall). It will work great with a D5 as well. Even for a standard bearing turbo it hits hard....real hard. Boost is as quick if not a tad quicker than the stock unit. Right around 5 psi it lurches to 26 in a split second.
Fun as Hell!

 

[DR BOOST]

i run a blow off valve on my car...i like being nice to my turbo. but in response to the main question, a well matched combo spools the fastest. my 66 bb spools so fast that i have to ramp the boost controller to keep in controllable. also if i dont prime the alky before a run , it will knock before the alky catches up.

 

[notacarlo]

My tires hate me.:biggrin:

 

[Turbo6Smackdown]

i run a blow off valve on my car...i like being nice to my turbo. but in response to the main question, a well matched combo spools the fastest. my 66 bb spools so fast that i have to ramp the boost controller to keep in controllable. also if i dont prime the alky before a run , it will knock before the alky catches up.

holy crap. theyre that fast eh? It looks like pure slicks for me then.

 

[Turbo6Smackdown]

It's kinda a to each his own thing I guess. But you said it best, the manual guys have to constantly let off the throttle....well, do that in the 1/4 and your et's suck with an automatic.

I'm not busting on you by any means, It was just an opinion. If a 9 second guy aint running one, neither am I.

I do think that money is better spent elsewhere, but this thread is about turbo's so I will offer my experience. I have a GT6131 with an Orange Stripe converter (3K stall). It will work great with a D5 as well. Even for a standard bearing turbo it hits hard....real hard. Boost is as quick if not a tad quicker than the stock unit. Right around 5 psi it lurches to 26 in a split second.
Fun as Hell!

I know youre not busting on me. You were just offering what you know. No worries mate. We're all in it together here.

The 9 second guys arent running it, amongst a TON of other things, because they dont ever get out of their throttle. theyre purely trailer cars, that get taken off the trailer, get run down a 1320 foot straight strip for 9 seconds a couple of times, then get put right back on that trailer, and trailered right back to their garage, where they proceed to take half the car apart again, and make 85 calls to jack cotton, cal hartline, chris kokkonis and mike licht, to 'improve' more things. (ie to fix half the crap they just broke lol)

Any time ANY turbo car drives in the street, you let off it's throttle THOUSANDS of times a week. the ONLY purpose of a blowoff valve, is to vent the air that gets immediately trapped, in between the still spinning compressor wheel, and the now closed throttle body blade. The reason manual cars get em, is because they literally get off their throttle 5 times as much as an automatic. (for 5 speed cars that is) while compressor surge (or compressor slam) doesnt really hurt stock applications that much, it can be quite compounded, by these 500 horsepower aftermarket cars. (99% of grand nationals) And while these new turbos are quite strong, some people still like to throw in a little protection to their 2000 dollar precision power adders, by installing a blowoff valve. Sure, 99% of people never have to replace their turbos from compressor slam alone, but god knows I'll be that one percent that does. So the way I see it is, it's cheap insurance. It's either 150 bucks now, or a 500 dollar rebuild later.
(disclaimer: I could be completely off in this theory, but it's what I gathered from reading this website. If I am indeed wrong, then come correct me. I need all the correcting I can get, before I drop some hard earned money lol)

 

[notacarlo]

My stocker had 150K on it before it let go, and it let go becasue I'm an idiot. I was testing a boost issue and wired the gate open. Couldn't catch it in time and overboosted. Huge scream and then done.

I don't race on the street and I roll off throttle, but I see where you are coming from.

I want a 6776 too! I gotta get the car to the highest of tens with the 61 first. I know it's got it in it, the car just needs a better driver.


I can burn down my M/T Sportsmans in a second on the street. I had to drop them to 9 psi before they would hook at the track.....and hook they did.

 

[Turbo6Smackdown]

what width sportsmans?