Single Turbo RX-7's Questions about all aspects of single turbo setups.

Anybody runing S362sxe?

Old 06-09-17, 01:48 PM
  #51  
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i suggest 5800 CC/Min of Gross injector capacity for the BW S300 SXE 62... (10.5 AFR at 560 hp).

you can switch over to the gas Walbro or use your pump and a Kenne Bell Boost A Pump.

set the BAP at plus 20% V gain and your Supra pump will work fine. i ran a Supra/BAP for 4 years at just over 500. the internal electrics are potted and KB has never experienced an internal failure. i especially like the fact it only juices the pump when you are in boost.

if you want some good info on it check out their site. you want the V adjustable model which isn't on their site but is avail as it is necessary on the Cad CTS-V. ask for Mike. i believe they are approx $268 and only avail direct.
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Old 06-09-17, 02:14 PM
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Howard, thanks for the advice. I'm waiting to hear back from the tuner on the actual peak injector duty cycle. The ~75% figure is from my memory on a phone call.

In either case, I agree with your advice to get a fuel pressure gauge and increase injector size. I'll consider my options further and check back when I have updates to share.
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Old 06-13-17, 04:28 AM
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Originally Posted by SirLaughsALot View Post
That's not even close to the right sized pump for that system.

Assuming you are set at 3 Bar since you're not saying otherwise, that's 6000cc/min at 100% DC. So, let's say a nice 80% DC gets you 4800cc/min. If that pump actually had PERFECT flow with no restriction, no lines, etc, 340lph converts to 5667cc/min of fuel delivery @ a little under 3 Bar. Looking at a graph of it's output and the understanding that pump reference pressure must increase to overcome BOOST in a system, then I can tell you from experience that this setup won't work. So running 1 Bar of boost (14.7psi), you're looking at only around 270lph (4500cc/min) of output at the pump (due to the pressure head the fuel now has to work against), and that's not even including the loss from lines, filters, etc. WAY underpowered for pump.

Luckily the Walbro F90000274 DOES work for this application and is damn near the same size. Run 10ga wire to it with a 30/40A relay and do it right.

The HKS Stainless Manifold is an Undivided T4, right? Ehh, kinda a waste on this turbo that has a Divided T4 Turbine Housing.
does the walbro tca380-1 work with this set up?
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Old 06-13-17, 09:59 AM
  #54  
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"does the walbro tca380-1 work with this set up?"

no
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Old 06-13-17, 04:10 PM
  #55  
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Originally Posted by Howard Coleman CPR View Post
"does the walbro tca380-1 work with this set up?"

no
x2

The calculations Howard and I laid out for you are simple enough that my 10yr old niece could do it. I don't want to hear any complaints, just bang it out.
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Old 06-13-17, 05:04 PM
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Howard / SLA,
Have you guys looked at the Fuel Lab in-tank brushless pumps? Particularly this one:
Inventory | Fuelab

They allow for PWM flow control, primarily from their electronic pressure regulator, but can probably be sent a boost based PWM signal from an aftermarket ECU. Wouldn't give you the higher voltage flow that the BAP offers, but nice to have full control of the pump speed built into the pump itself. Lets your run the pump at a much lower speed at idle and cruise. Less noise and wear on the pump. I'm not sure if this would be a drop in for the factory pump.
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Old 06-13-17, 06:17 PM
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Originally Posted by SirLaughsALot View Post
x2

The calculations Howard and I laid out for you are simple enough that my 10yr old niece could do it. I don't want to hear any complaints, just bang it out.
this is the pump my tuner told me to buy :l
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Old 06-13-17, 06:39 PM
  #58  
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"Have you guys looked at the Fuel Lab in-tank brushless pumps?"

i did cover the FuelLab option in my Fuel Pump Options thread. post 6

https://www.rx7club.com/single-turbo...014-a-1062109/

i have no experience w them but it appears they make top shelf items.

probably nice to have if you intend to spend the extra $s. normally the FD required mod list is lengthy enough just doing it correctly that extra dollars are difficult to find.
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Old 06-15-17, 06:05 AM
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Dual pump? Not mine though.
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