BW S372 vs. GT4292R?

[me612]

Would a Walbro and Bosch work? Twin internal hangers is insanely expensive!

Twin internal Walbro's is relatively cheap and simple to do in a 1G.

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[1gDSM4g63]

The only place that I know of that sells a dual internal Wally hanger is Full Blow Motorsports priced at $390 no including the Wally pumps. Wouldn't it be cheaper and better just to go with a Aeromotive 700 HP EFI or an A1000 single pump?

 

[andy4g63]

The only place that I know of that sells a dual internal Wally hanger is Full Blow Motorsports priced at $390 no including the Wally pumps. Wouldn't it be cheaper and better just to go with a Aeromotive 700 HP EFI or an A1000 single pump?

Aeromotive pump is like glorified Wallbro. Doesn't flow much at high pressure boost. Even Bosch 044 flows more. It is a 700 hp pump, but for carburated motors, mostly.

As you own 1G, you are left with only one option:
Buy a sump tank from Summit, weld it on your tank and run 2 Bosch 044 pumps external in parallel. They flow quite a lot-500+ LPH/according to AMS/. Just did it to a spare tank I had.

 

[Slippi84]

Aeromotive pump is like glorified Wallbro. Doesn't flow much at high pressure boost. Even Bosch 044 flows more. It is a 700 hp pump, but for carburated motors, mostly.

As you own 1G, you are left with only one option:
Buy a sump tank from Summit, weld it on your tank and run 2 Bosch 044 pumps external in parallel. They flow quite a lot-500+ LPH/according to AMS/. Just did it to a spare tank I had.

Unless you get the Pro series like I'm doing with the voltage regulator like me

 

[me612]

The only place that I know of that sells a dual internal Wally hanger is Full Blow Motorsports priced at $390 no including the Wally pumps. Wouldn't it be cheaper and better just to go with a Aeromotive 700 HP EFI or an A1000 single pump?

You do not need a special fuel pump assembly to make dual 255's work in a 1g. Look at the picture I attached. All you need is 2 pumps, a hose clamp, a T or Y fitting, some fuel line, and a dremel tool to grind away part of the stock assembly. That's how most of the world is running dual intank walbro's.

 

[ceedawg]

The intank walbro 255 flows 202 lph rewired at 35psi with a base fuel pressure of 43.5psi. See AMS flow testing. (202LPH X 1000cc) / 60min = 3367cc/min. This is not enough flow for 850cc injectors to max out at 100% idc. You need larger injectors than 850s for your hx40.

I have 950's ,-10 lines feeding the fuel rail and -6 leaving,wallbro 255 pump. Will I have to run dual fuel pumps as well with my HX40?

 

[dsm-onster]

The OP wants to completely max out his hx40. What do you want? It's good for about 650 crank hp at 11:1 a/f ratio. And about 700crank hp at 12:1 a/f ratio assuming the same BSFC for both race gas and pumpgas.

 

[ceedawg]

The OP wants to completely max out his hx40. What do you want? It's good for about 650 crank hp at 11:1 a/f ratio. And about 700crank hp at 12:1 a/f ratio assuming the same BSFC for both race gas and pumpgas.

OK Matt, then I guess I'm good. 450 to 550whp and I'm happy.

 

[1gDSM4g63]

The Holset HX52 is hard to come by so I'll stay with the HX40 for now and see what I can get out of it.

Does anyone know about the HX50 and the flow rate because someone in the Holset Part 5 thread said it has the same compressor as the HX55. Is that true?

 

[dsm-onster]

All I've seen is the same map used for both, a .75kg/sec (99lb/min) map with VERY high boost efficiency and a very reasonable surge line considering a 100lb/min flow. At 30 psi you are to the left of the surge line at only 26lb/min and choke flow at that boost is the 99lb/min . That's a fat map!

I have no clue how many different compressor options there are. E.G., Holset Frame Sizes has one compressor map and one flow rating for the hx40 and hx35. Yet we know that there's 2 different wheels found stock on the cummins 1/2 ton hx35 and at least 3 different compressor wheels used int he hx40 frame size.

 

[1gDSM4g63]

It's impossible to get the full potential that fat of a map, so probably going to the HX50 wouldn't be a good idea right?

 

[Slippi84]

So probably going to the HX50 wouldn't be a good idea with all that lag right?

Hx52 can make more hp than 95% of the cars around if maxed out. No need to go bigger just to have extra lag. It's like not being satisfied with a gt42r. Unless your in competition style drag racing and in some kind of circuit a hx52 will meet your goals and some and still give you reasonable street manners.

 

[1gDSM4g63]

I understand the lag vs. the power and the HX52 best compensates both worlds for a relatively cheap price, but it's just hard to find those turbos. So all I'm left with is the HX50 or the HX55 or to go on Borg Warner.

 

[dsm-onster]

It's impossible to get the full potential that fat of a map, so probably going to the HX50 wouldn't be a good idea right?

No, the fat map makes it perfect for a 4cylinder. No surge for a compressor that flows 100lb/min. And being that the hotside in the stock twinscroll housing spools so fast with the proper manifold, then you have insanity under your foot!

But I reiterate. That's only one map and flow rating for the hx55. There could be several others. If you can get the compressor diameters of the choices you have, compare them to what slippi84 has. And report back. W can give you a "yes it will flow more than the hx52" or a "no it will flow less".

Hx52 can make more hp than 95% of the cars around if maxed out.

More like 99.999999%

 

[Slippi84]

No, the fat map makes it perfect for a 4cylinder. No surge for a compressor that flows 100lb/min. And being that the hotside in the stock twinscroll housing spools so fast with the proper manifold, then you have insanity under your foot!

But I reiterate. That's only one map and flow rating for the hx55. There could be several others. If you can get the compressor diameters of the choices you have, compare them to what slippi84 has. And report back. W can give you a "yes it will flow more than the hx52" or a "no it will flow less".


More like 99.999999%

I know but you never know so I threw 5% in there . I figure there may be some gt42 nitrous guys that don't post. We'll just say you'll make more than just about everyone

 

[1gDSM4g63]

That's only one map and flow rating for the hx55. There could be several others. If you can get the compressor diameters of the choices you have, compare them to what slippi84 has.

Here are the specs for one of the HX50, but the housing is a lot bigger at 25cm than slippi84's HX52 16cm and it may cause a huge amount of lag. As for the other compressor spec I don't know what how they compare to the HX52.

Compressor Housing: Holset "High Flow with Anti Surge" HX50 with a huge 3.5" (88.9 mm) inlet and 3" (76.2 mm) outlet.
Compressor Wheel Diam: "Super High efficiency" 2.522" (64 mm) Inducer ("Small side") and 3.898" (99 mm) Major ("Large side") diam.
Turbine Housing: T5 Style 25 cm (Close to T5 1.15 A/R) with a huge 4" (101.6 mm) V-Band exhaust flange.
Turbine Wheel: High Flow 3.030" (77 mm) Exducer ("Small side") and 3.384" (86 mm) Major ("Large side") diam.
Center Housing : Oil-cooled.
Turbine Inlet Flange Footprint: T5 Divided.

 

[JOEY A]

Max out your setup, dont be like all the other idiots that just keep adding bigger turbos making bad numbers and coming up short on track times.



People are putting 16Gs into the 10s maxed out, and thats a small turbo!

 

[Slippi84]

Max out your setup, dont be like all the other idiots that just keep adding bigger turbos making bad numbers and coming up short on track times.



People are putting 16Gs into the 10s maxed out, and thats a small turbo!

If that were the case you would see all the 60-1 guys in the 9's which you don't. It's not as easy as you think. Have you ever taken a 16g into the 10's?

 

[dsm-onster]

Yep, ET and MPH are different things. There's a 14b car in the low 10s right?

While I agree that in this case the hx40 should be pushed first, if for nothing else, the experience. But still it's rediculous to promote a turbo based on ET. What mph and weight do these 16g turbo cars have? IF you're talking about CBs car, then yea build it like he did and drive it like he did, and you can do it. In the mean time, stick with a turbo that makes the HP you need to take your particular weight down the track at the average ET of everyone else.