Quick-spool twins: anyone hang a SPS66 underneath the stocker?

[Hohn]

Just curious. I think that the SPS66 could be a great primary in some small twins, as it's a LOT more advanced than the dinosaur-like HT3Bs that many folks are running.

Personally, I think a stock HX35/12 and a SPS66 would make a WONDERFUL twins combination, because the SPS66 can push a lot of PR, has decent spoolup, and doesn't have a super restrictive hot side.

Anyone done this? I'd like to hear results.

jh

 

[Diesel Freak]

I would wager a guess that it would be a bit too small, and choke out as you tried to raise boost pressure to a decent level.

 

[zstroken]

I think that the SPS66 still has too small of an exhaust housing for a good charger in twins, unless you externally wastegate it. I think the nice thing about the H3TB is that it is cheap.

 

[JCutter]

I was thinking about it once with my hy but thats as far as it got.

 

[Diesel Freak]

It just too small.



Try a S400 (BW AirWerks Part number 171701) It's very similar to the K31 everyone is going Koo Koo about, except for the fact that the turbine is a little large, and it comes with a 1. 32 A/R housing.



At a 2. 25:1 pressure ratio, it has almost equivelant air flow as the PS66 @ full tilt. This means much cooler air temps!!! Perfect for twins!!!

 

[Hohn]

I think that the SPS66 still has too small of an exhaust housing for a good charger in twins, unless you externally wastegate it. I think the nice thing about the H3TB is that it is cheap.

The dual-port 'gate on the SPS66 is insufficient??

 

[Idaho CTD]

Or just use the K31 as it comes box stock with a wastegated housing and 1. 28A/R. The guts are about like a GT42.

 

[Diesel Freak]

The dual-port 'gate on the SPS66 is insufficient??

when used in the situation you are looking at, it is EXTREMELY insufficient!!!



The turbine and housing would turn into a cork!!!!



A Garrett GT4088 - 703457 - 2 is "almost" a dead ringer for a PS66

 

[Hohn]

It just too small.

Try a S400 (BW AirWerks Part number 171701) It's very similar to the K31 everyone is going Koo Koo about, except for the fact that the turbine is a little large, and it comes with a 1. 32 A/R housing.

At a 2. 25:1 pressure ratio, it has almost equivelant air flow as the PS66 @ full tilt. This means much cooler air temps!!! Perfect for twins!!!

Sounds perfect to me!

The idea of twins using the stock charger appeals to me, but I'm not an HT3B fan.

Oh, I found the P/N you posted for $483. 75 brand new-- good price??

 

[Diesel Freak]

Sounds perfect to me!



The idea of twins using the stock charger appeals to me, but I'm not an HT3B fan.



Oh, I found the P/N you posted for $483. 75 brand new-- good price??

no clue, never priced one

 

[Forrest Nearing]

it would be insufficient in twins because you would be overboosting like crazy...



go with a cheaper and better turbo for your bottom turbo... the sps66 is the cat's backside as a single (or for a top turbo if you're pumpin' the big fuel like Mr. Fulmer! LOL!) but it was designed as such...



you can find a readily available big truck turbo that will work much better for less than half the $$$

 

[Hohn]

Why are bigger turbos so cheap? Is it just market forces? More supply?

Witness the <$500 price quoted to me for the S400 above.

 

[Tcolesanti]

Why are bigger turbos so cheap? Is it just market forces? More supply?



Witness the <$500 price quoted to me for the S400 above.

Mass production and no modifications.