SPS 66...need info on surging

[Jim Fulmer]

So as of now I'm running my SPS 66 as a single with a decent amount of fuel (I. I tweaked 215) and 370. I now have a few miles on it and I'm noticing nothing but smooth driving and good response. I don't see what some people are talking about the surge you see in this turbo. This is with the converter locked or unlocked.



I'd like to have some situations that any of you are seeing so I can put my truck into the same situation for R&D. Right now I'm running at about 48 psi and it makes fun power as I call it but by no means is it weak..... buries the road in smoke. EGT's... . not sure the gauge is not working right but I'm sure there high.



Thanks, Jim

 

[JVolpe]

My II SPS66 has been on for close to a year now. I have not experienced any surging at all. I have ran daily anywhere from stock hp to 550hp and have never had any issues with the SPS66. Stock hp does make it a little laggy in city driving, but not enough to bother me. My wastegate is set at 55psi and at the track I can keep it open a lot of the 1/4. I don't tow heavy and maybe that is where most are having issues. My only problem is barking and that's not the turbo's fault. BOV going in very soon to help with the barking.

 

[Latenight6]

i you call brett at industrial he will get you through it he say that turbo effects some truck. like mine it surged an i went to a 62 truck is fine. egts great

 

[Jim Fulmer]

i you call brett at industrial he will get you through it he say that turbo effects some truck. like mine it surged an i went to a 62 truck is fine. egts great

I now have a few miles on it and I'm noticing nothing but smooth driving and good response. I don't see what some people are talking about the surge you see in this turbo.



Clarification.



Jim

 

[zstroken]

You may not experience it as much with a single disk convertor. I had a silver bullet on my 97 star wheel full forward on a 215 pump with a 0 plate. When I locked out OD and the truck locked up in drive it was really bad. I tore into the AFC to change its setup and no surging at all. Of course the AFC arm doesn't bottom out until about 25 psi now.

 

[JCutter]

From my understanding it was only in the 2nd gens as mine does it. It use to do it pretty often until i got the new smarty program, that helped alot.

 

[Jim Fulmer]

You may not experience it as much with a single disk convertor. I had a silver bullet on my 97 star wheel full forward on a 215 pump with a 0 plate. When I locked out OD and the truck locked up in drive it was really bad. I tore into the AFC to change its setup and no surging at all. Of course the AFC arm doesn't bottom out until about 25 psi now.

I've tried it in ever way I can think of... ..... test road is on the way to work.



I've told people countless times that the AFC is the key to a 12V and tuning. Mine is set now with a 215 spring and it get's max fuel about 40 psi and boost is at 50. What kills me is it will take both stages (and two pumps) of water/meth and just go with it. Never dreamed a single would be this spooky even on water. Those EDM's we were talking about will go in without a doubt ,hate to as there perfect off the test stand.



Now add some N2O to the setup and it would be flat wicked.



Jim

 

[HeberRam]

Surge

Jim the surge some are experiencing, depends on basically three things. Load, altitude, and outside air tempature. I live at 5700' and work at 8700' and I can drive normally without surge, if I don't put a load on the truck, ie. tow something, or steep grade. If I drive my truck to say Las Vegas approx. 1800' no problem. If the outside air temp is say 90*+ and at high altitude, the truck will surge. The surging occurs around 1700-1800 rpm. If you run the truck at higher RPM the problem goes away. The surging is like the truck de-fuels, fuels, de-fuels etc. Like it's sucking for air that isn't there. I'm running the Silver Bullet, however, the top end power more then makes up for the surging. That's why Industrial Injection, doesn't recommend this turbo, or the sp66 for a single charger for towing. It is pretty much a race set-up. If you live in an area at sea level or slighty above, these turbo's are a bat out of hell.



P. S. the surging is more prevelent in auto's vs manuals, as the manual you can down shift easier to increase the RPM's to reduce surging.

 

[Jim Fulmer]

I hear you as we are at 1300 ft here. I do need to add the I. I. real injectors in and finish tuning then get on the dyno. I'll bet money that I'm higher in power than I was using a stock pump and a 35/3B Twin setup way back in the day. She's hanging at 50 psi right now with my head and cam.



Jim

 

[Bandit1]

Jim, i can make mine surge but thats it. if you want me to explain it to you then give me a shout. it is hard to type what happens. Josh

 

[CumminsAholic]

I have a 64, but mine surged betweeen 20 and 40 lbs of boost. No matter what the conditions, it did it between 20 and 40. I recently took off my k&n filter and put on an afe proguard 7 stage 2 intake. There is no more surge. I haven't hooked to a trailer yet, but the surge is gone empty. My boost gauge would shake and you could hear it sh sh sh sh sh sh... Brady said it needed air and it'd help out with the surge, but I didn't think it'd eliminate it. Anyways, if you want to make it surge put your stock intake and filter back in it, that should put ya on the right path.

Corey

 

[Jim Fulmer]

I put a boot elbow on mine with the old filter that I use to run on my Twins (AFE 5 x 12) that might have something to do with it..... lots of filter. I do know you can buy this filter and use a 4-5" swedge or an AFE 4 x 12 and use the stock hose and it would work fine. Both filters are cheap, much more than an intake system but not quite as cool.



Jim

 

[DBraunig]

I'm ditto with Bandit1. I can make it do it but its hard to explain. It's always when i am accelerating but not really getting on it and then the trans hits lock up too soon. Last time i felt it i was behind a slow poke and then went to pass (easy) when the road went to four lanes, and the trans hit lock up. you can push right past it if you fuel, or just back off a little. I credit mine to 3. 55 gears, 305 tires, and 7000lbs . Charger has been on since February and i have felt the surge less than ten times, mostly when i first got it, before i learned how to drive my truck again. I like mine though, been liking it for six months. Just hold it to the floor Jim, it never does it at WOT :-laf



Dave

 

[Jim Fulmer]

Now with even more time on it I still have no issues. One thing that I did find was the end of the Turbo and what it will support. Yesterday morning I put my fresh EDM's back in as the 370's didn't seem to be enough, told by the water coming on like a small N2O hit..... lack of fuel. The first time I jumped one it it was banging a little... . blowing the fire out, so I disabled one water pump, still there a little, turned the water off... . gone. I need the water for the cooling so in two steps I backed the plate off from 3/4 forward to the middle and set max fueling at 40 psi (boost is at 50) and she is running like a top. It would be interesting to know were the power is at with the single..... my guess is 600-650 range. Needs a freakin bottle now, this thing would fly on N2O.



Jim

 

[Bernhard]

Just wondering, Is it possible to have SPS 66 in the 600HP range and still tow with it? I need my truck to still tow and haul but I want to have fun with it also. I need to upgrade my turbo because I can't spray my HX-40 :{



Thanks for the reveiw Jim it helps us all!





Brenden

 

[bmoeller]

What turbine housings tend to have the surge problem? The 12 or 14?



I have a used HTT 64/14 to put on, once it has been gone though. Still haven't had a chance to send it in.



I need to tow with it, and still debating on which housing to go with. I have 4. 10s as well. Don't know if the 12 would be too restrictive at the higher RPMs or not. The spoolup of the 12 would be great.

 

[Cooker]

bmoeller,

Since you are running a 40 now I would not even consider the 12. It would seem to choke quite a bit on the top end as compared to your 40.

 

[bmoeller]

That is what I was thinking. Wasn't sure if the dual wastegate would flow enough or not.



I talked to Everett from HTT at IRP, but he left me scratching my head even more. He was recommending a 62/12, and I already know that it isn't enough turbo for towing, with my fueling. That, and I hate the sound of the whistle on it. Most sound good to me, but that one is really annoying.

 

[Cooker]

Forgot to mention to that with 4. 10's you will not have any problem with the 14 housing. I didn't like towing with my 14 housing (it was on a SPS 62) all that much with 3. 55's and 33" tires but with 4. 10's it should be great.

 

[CumminsAholic]

Well, I hooked up to a trailer with the intake now. The surge is still there, between 22 and 28 lbs of boost, but it's barely there. It surged way worse empty before than it does now pulling.

Corey