Fuel questions

Mr. CR-V said:

I know I need a manifold. I think I'm going to get a cast-iron manifold for a GSR, because I think those fit the B20. If not, I'll have a custom one fabricated.

So, a Vortech FMU, a pump, and a boost gauge. You think 15 psi is safe for the engine? Thanks again.

Jason

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NO......soflags-t don't mis-inform.
Don't run 15 psi on that or any stock honda engine.
You will run into several problems
1)15psi on any turbo is to much for a stock honda.
2)since this is a low budget build up you will be using the bare minimum like a fmu and larger fuel pump rite.
well here's a quick fmu lesson.
the fmu adds more fuel by raising the fuel pressure (blocking the fuel returning to the fuel tank).So when the injector opens more fuel is squirted into th cylinder each time it opens.So say you go with a 10:1 fmu (10:1 means that the fmu will raise the fuel pressure 10psi for every pound of boost the turbo makes) and 15psi of boost. here's a little math.

say 40psi is your idle fuel pressure so take
40+(10x15)= 190psi of fuel pressure.

So now you have 190psi of fuel going through fuel lines and connections designed for 60-65psi.
Then you have the problem of the fuel injector spray pattern (or lack there of).
Injectors should only run at about 75% duty cycle.Above that the life drops greatly along with power production.
It all realy comes down to the fact that the stock fuel system can not supply enough fuel for 15psi of boost.
Since your just getting started i would recomend about 5-7psi until you learn more and have more money to upgrade your fuel/ignition system to support more boost.Good luck

Mr. CR-V said:

What brand/size pump and brand/rating FMU do you recommend for my application then?

Also, can anyone confirm that a GSR turbo manifold will fit my B20 block? Thanks.

Jason

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Most people go with a 255lph (liter per hour) fuel pump.Several companies make them like holly (walbro),msd,bosch,vorec,etc.When you order one make sure you specify that it 's for a forced induction engine.I know summit racing sells one made by holly that is designed for turbo/supercharged applications.
Most people just use a vortec or cartec fmu.With the vortec you will want to start with a 12:1 diaphram.
A manifold for gs-r will bolt up to any other b-series (except the older prelude) the only problem that you may fun into would be the turbo clearing your radiator or ac.I have a b-series drag manifold on my car and it angles forward a little.You can also contact south florida performance for a manifold they specialize in custom turbo manifolds for any car.I don't have a number handy because i'm on vacation but they advertise in ss,and import tuner.

Isn't a TDO5-14B comparable with a medium to big size Garrett T3 turbo? A TDO5-14B at 7-8psi might not be that bad on a motor that has a cr of 8.8:1 or 9.6:1(don't know what year CRV MR. CR-V has), especially with the fuel setup everyone is telling Mr. CR-V to get. 15psi is a good number on a motor that has a cr of 7.8:1 like 1st gen DSM's. This is going on a B20 CRV motor right? If so then yes a GSR manifold will fit. My neighbor has a Greddy GSR cast turbo manifold on her setup. For fuel I would go with a good inline(Aeromotive, MSD, Airtex) or intank(Holly, Walbro) fuel pump, 310 cc injectors, 8:1 FMU, Apexi S-AFC, and adjustable FPR. When you save up some cash I would dump that setup and switch to Hondata or some other type of affordable standalone and up the boost since you have a low cr motor.

SoFlaGS-T said:

15 psi on the 14b will not give major cfm's like other turbos would... like the t3/t4, or the 18g... the 14b is a small turbo... i dont see why not

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That turbo is about the same size as th one that comes in th greddy kit rite,well would you crank th boost up to 15psi on a stock civic with a greddy kit? no.
Like i explained before,there is no way in hell the fmu will work for 15 psi worth of boost.At 8psi and stock injectors your pushing it.Now if he had the funds available he could either
a) ditch the fmu route and go with hondata or accel dfi or
b) get a 4:1 fmu,fuel pump,500cc injectors and an apex afc.
but even then your still looking at 100psi of fuel.
Any way you look at it a stock engine will not hold 15psi of boost.Sure it's not flowing as much cfm's but the boost is going to be a lot hotter then it would be if it was say a t3t4.
small turbo + high boost = lots of heat
big turbo same high boost = less heat thus better quality boost.

I'm going to assume that from your sig that you own a gs-t so in that case 15psi is perfectly fine for your engine (i believe 12psi is stock) but on a n/a honda engine it is a whole different ball game.

The highest boost that i've heard of on a stock engine (daily driven) was 13psi and that was on an ls integra that has really good tuning,the type of tuning a fmu can't supply.and that was also a t3t4 turbo.