SPS62 vs 35/B2 Twins
#1
SPS62 vs 35/B2 Twins
I have the sps62 and it runs good if your running the truck wide open and playin, but i pretty much just daily drive my truck and haul wood with it. Might want to tow a camper with it in a couple years. With the mods i have and what i do with the truck would a 35/B2 setup or something simliar spool quicker for daily driving and get up and go. It's now showing my sig so here it is: 2001 QC Short Bed HO 6 Speed, AFE Progaurd7, SBC DD 3850, DDUFM, SPS62, DD 4 jammer injectors, Fireringed, studded, Pryo, Boost, Fuel Psi. Gauges, FASS Fuel Pump, Smarty
#3
Hmm I have been impressed with my 62ss turbo when hauling the other day I was doing around 6k with ease egts were fine. Maybe the smaller stainless 13 exhaust hausing is the differance in the spool? I like my trurbo more and more every day!!
#4
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ive had a sps62 a sled puller 66 and now 35 over ht3b and theyre not even comparable. the twins spool so fast. the egts dont even move i cruse at 550-650 all i can give it with the smarty on 8 edge on 5x5 i see about 1200. i hauled a load of scrap the outher day. i weighed in at 17,400. the egts were never over 1300. the best way i can explain how they drive is like a stock truck with 550hp. i think twins are so expensive because you get what you pay for. definatly worth it
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I'd agree with j-fox, I wouldn't want to tow with my turbo. Gets pretty hot fast, and the spool up is by no means stellar. And I'm by no means underfueled.
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#9
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Perhaps, but it spools better with the p-pump. It seems to come on around 1800 rpm, which to me seems late for towing. Then again, I don't tow, and I like to run around in the lower rpms. I will be towing once I get my Ford project underway, which is why I'm gonna be ditching the single for the twins.
#10
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Perhaps, but it spools better with the p-pump. It seems to come on around 1800 rpm, which to me seems late for towing. Then again, I don't tow, and I like to run around in the lower rpms. I will be towing once I get my Ford project underway, which is why I'm gonna be ditching the single for the twins.
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if you can afford twins, go for it. towing with them is 10x better than a single. with the single your always shfting to keep the rpms up or just towing a gear to low to keep the rpms up. with my twins they come on around 1500-1600, and are at 40lbs by 2100 rpm's. i also have a cam but that made them spool about 100 rpm's quicker. like they say with single turbo you need to give a little to get a little. i found out with the twins you get it all. and the set i have use turbos from the stone age. i cant amagine how some of the new sets people build drive
#12
i want to stay around the 500 mark or below, would it be better to go with a K31 turbo. I know source automotive has pipes for the s400 to plumb it up but what about a k31. Haven't seen pipes made for them to use stock turbo.
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A k31 will fit right in place of an s400. You onlt need to slide the downpipe back 2 inches. I am running the 35/k31 and love it. I have never run the 62 so I cant compare the 2, but I definately love my twins. spoolup is good and it keeps everythingcool when I do tow.
Joe
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#14
I am amazed that you guys who buy the 13ss housing all tell me that 1800 is where they spool. My 14 has 20+psi by 1800rpm & with my box turned up will spool at 1300-1400rpm depending on how hard I hit the go pedal. There is a hill over on route 166 they call ***** Hill because the name fits it well. You decline down a 9% grade & you have to make a full 90* turn onto ***** Hill crossing a 12ft wide bridge [single lane traffic]. I only have 30-35ft of road before this hill goes up hill 9% grade for 1 mile long. I make this turn in 3rd gear, punch it & see my boost peg 45psi & revs hit 3000rpm. I shift 4th gear & the turbo drops to 10psi, but spools fast to 45psi & I top the hill in forth going 55mph. My egts don't go over 1250* pulling 15k# up this hill @ 55 mph running sw2, 2x5. I've posted this before & I'll say it again " The 4 flow Dragon Flow injectors are a perfect match for the HTT 62/71/14". I honestly think this combo can't be beat for heavy towing.
I think twins really are the way to go, I have 3.55's and 35" tires so spooling a large turbo would be even more difficult for me. Twins should give me more airflow than a large 66mm single and let me tow all day long with super low EGT's and intown driving should be WAY better.
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I would love to have twins on my truck when i start getting serious with it, but then I cant pull any of the DHRA classes and be competitive, but there is a pulling sled that goes all over the place here every weekend and has a points system I could pull with since its run what you brung. Id just love to have twins so I could be making some major power and still tow. I have ridden in a 12 valve with PLENTY of fuel and a SPS62, and it sucked for towing. Mine with my HX35 would of out hauled it for sure with lower EGT's, and better spool.
Eric
Eric