Why aren't people trying this setup? Is it because of spool up time, more heat, more money, more **** to break, or more back pressure?



I realize that's it's probably all of those and that 13B's would have a hard time spooling two GT30/37's without some huge exhaust ports but wouldn't it still be possible?

Unless you come up with some crazy, vacuum and solenoid driven, exhaust gas flow directing mechanism, you spend too much time to left of the surge line.



Howard tried an interesting experiment with some decent sized singles but they were below (left) of the "line." Never spooled them up.



So, you would have to flow some HUGE numbers, or at an insane VE, to get them to come on at a decent RPM.



I dunno. https://www.nopistons.com/forums/pub...1047683561.gif

I thought so, would it be safe to assume that a 20B could spool those turbo's at decent RPM's?

Anyone have any flow numbers for a 20B? I assume it's 50% greater than a 13B. Hmm. I'll chew through the math and post some numbers on some well know compressor maps.



Hmm. The more I think about it, the more I think that a GT42R on a 20B would KICK SOME ARSE! Gut instinct from running a GT40R on a 13-Brew.



Anyone have any VE numbers for a 20B?

All of the above. I have a 1/2 bridge motor that says they will spool quick enough. I tell you what, you buy and I'll try. I'll even put it on the dyno, so you can see full boost at 6,000rpm's and shift at 11,500.

igy didnt you used to have a twin (single) turbo setup?

LOL, I was pretty sure they'd boost nicely by 6K, but how long would that motor last? And IGY please remember, I'm in the states, and can't afford a rebuild every week. https://www.nopistons.com/forums/pub...#>/biggrin.png





Thanks man, I'd really appreciate some concrete numbers.

you looking for something like this source?



http://www.ksp-drag.com/fc3s/car/UPDIARY/14.jpeg

https://www.nopistons.com/forums/pub...1047683572.gif



That TII manifold is going to choke it some...no?

That's exactly what I'm looking for. https://www.nopistons.com/forums/pub...IR#>/boink.gif

Wow, that thing will never spool.

im sure those turbos will find a way to make the engine feel the pressure https://www.nopistons.com/forums/pub...DIR#>/wink.png

That is the KSP drag car's motor, twin HKS 3037S turbos. https://www.nopistons.com/forums/pub...IR#>/smile.png Spools enough to get them in the 9's

I guess when you can sit at the line near red-lining the motor spool up isn't an issue. https://www.nopistons.com/forums/pub...#>/biggrin.png

how about using these "snails" for twins https://www.nopistons.com/forums/pub...R#>/tongue.png



http://i.a.cnn.net/cnn/2004/TECH/sci...l.giant.ap.jpg



this thing will never spool up it's so huge

Uhhhh....eww.

huh? Igy's twin standard bearing t-04S's spooled on his street port. How would 2 GT3037's(SMALLER than a T-04S and BALLbearing) on a BRIDGEport not be able to spool?

Spooling them wouldn't be an issue, spooling them at a reasonable/streetable RPM is the problem. If I could make full boost by 5-5.5K with a large street port then I'd be all over them. I have no problem spraying, in fact, I like the idea.

car first......... turbos later

I'm the type of person who likes to get things out of the way as quick as possible, so if I can sort out what I wanna do with the turbos before I have the car, it's all the less work for me when the car arrives.

aka a "dreamer" jk https://www.nopistons.com/forums/pub...#>/biggrin.png

Exactly. Drivability on the street, such as day to day, would become an issue I do believe.





https://www.nopistons.com/forums/pub...1047683785.gif



Exactly how I was before I got my FB. https://www.nopistons.com/forums/pub...IR#>/bigok.gif

i guess to each his/her own

I agree, I like to think about what's ahead. I am not a dreamer though, I'm a fantesizer. https://www.nopistons.com/forums/pub...IR#>/bigok.gif

Actually drivability was better for day to day on the street. I got better gas mileage because I stayed out of the boost more.

I believe you, I'm just surprised!

what is the CFM and VE for 13b engines?



i hope it ends up at something better than 9lbs/min

*dreaming on*



I was thinking a bit more about what Van said. I'm pretty sure now I'll go with the twin GT30/37 setup. Ito's wild ports should be sufficient to spool em up reasonably, and whatever the ports don't do, I'm positive a 50 shot will take care of.



*dreaming off*

are you serious, he rebuilds every week?

lol

Nah, he's wrong. Sometimes I rebuild twice a week. https://www.nopistons.com/forums/pub...>/rolleyes.gif

LMFAO...It's not IGY who rebuilds every week....that's me. https://www.nopistons.com/forums/pub...1047683785.gif

Remember though....GT3037's aren't cheap. https://www.nopistons.com/forums/pub...IR#>/blink.png

OMFG I'm dying over here. BWHAHAHAHAH







I was looking at Cheapturbo.com's site and they're 1200 each. It'll be a bit more (understatement) then a single, but I'll be happy in the end. I think. https://www.nopistons.com/forums/pub...R#>/unsure.png

You're looking at atleast $10k for that setup with supporting mods, excluding a new drivetrain everyweek.

Hmm, I was thinking more like 5K. Turbo's are $2,500, a big ass IC core at about 700 including piping, and the rest would suffice for a manifold, dp, fuel, and wastegate? No?



Plus, why would I need a new drivetrain every week LOL? It's not like I'll be making more power then any of the single turbo guys.

umm, yeah you would be more power, not much more power would be like twin GT25s. Piston guys see well over 400-450 hp on this turbo SINGLE. Two of them, although a bit lower output on a rotary is still capable of like 700hp. i really hope that you've considered what **** is going to break with that much power. Its not like you can just build it once and not have to keep putting money into it.

The Turbos on cheapturbos and the ones on the KSP drag car are different.



The Garret listed on cheap turbos is a lot smaller, the ones on the KSP car have the following dimensions



1401-RA107 *General Application* 48T 0.73 T25 Flange External $2695.00



Little more than you think, plus the custom twin manifold, dual wastegates, and the fuel system put you well into the $7000 range for this kit.

The KSP drag car produces 700+ hp on that setup and is in the 9's

3030 or 3035?