The injector staging is less than perfect already ..... so could be a mission .
Might work though ......worth a try

 

sub'd to this thread

I'm looking for the same information
[fuel pump] & [fuel injectors]

 

From my research (not personal experience), many Rx8's are putting down 300+ to the wheels with the stock pump and injectors. To me, this is working the stock injectors to hard (85% or more duty cycle).

With either a dw200, dw300, or Aeromotive 340 pump, and use yellow injectors in the primary location and all four blue injectors in the secondary position, 350whp is achievable with some room to grow.

 

Personal experience is a road built on a foundation of failures. You will get some soon enough ...

 

Really... where exactly are all of these 300+ whp RX-8s?

 

The injector side of things is easy . I'm interested to know if anyone has tried a larger pump in a S2 housing ? Seriously considering this idea myself after multiple bad experiences with my current setup. (Walbro in an S1 housing)

 

Did you say fuel cooling? muahahahaha! Now we are talking

 

The turbo checklist thread on here has quite a few. The word "many" maybe wasn't a wise choice for this forum.

I also live in an area where rotary cars are not rare. There are quite a few turbo Rx8's in the area that are not on the forum.

 

What problems have you had with this set up?

Why do you think that the s2 housing might fix this problem?

 

Original issues?

I see about 70psi of fuel pressure from my setup, and its the walbro255 in melted s1 housing

 

Can't go below 1/4 tank around high G corners (under boost) without starving.

The S2 pump supposedly resolved this to a large degree .
So I figured the S2 housing with a Bigger pump would be a better solution for us turboed S1 guys.

 

you need to be talking to dannobre, he is the most experienced member here in dealing with this issue IMO ...

 

True . I'm really just wanting the best in tank solution possible though , not wanting to use the car in competition like he does.

 

Off topic but did you increase your injector size?

 

What fuel pressure were you seeing?


Did you notice any other side effects from the larger pump in the stock pump assembly?

 

He would probably tell you the same thing ...

https://www.rx8club.com/rx-8-parts-s...8/#post4599058

competition has nothing to do with understanding the elements involved in order to make proper decisions

 

Yeah I have a turbo with larger injectors, I haven't seen any side effects. but I don't let it get below quater tank.

 

But G forces in competition are WAY more than I will ever achieve and that does have a big bearing on what will and wont work.

 

IMO you only say that because you don't understand the elements I was referring too earlier. That's what he's doing now, but he went through exactly what you describe a long time go and learned a lot about how the system responds doing exactly what you are inquiring about.

like he said in the link I posted previously ... I won't mention it again, was just a friendly suggestion is all

 

I just put a DW300 in a s1 housing. The sock filter fit perfect. It is quieter then the stock pump. I got my nebighor's kid to help and we both hammered on the ring at the same time. It came right off. Everything went together perfect.

It now pulls 60 PSI at IDLE instead of 58, and 68 Is my max pressure after a couple of pulls. It was 65 with the stock pump.

Now to see how much my fuel trims change.

Brett, I just found the info about the venturi and it was MM saying to drill it out. I just installed it and melted the venturi cap. https://www.rx8club.com/series-i-maj...1/#post3075922

141,469 miles and barely dirty filter.


after cleaning

 

Hopefully you didn't drill it out

 

That thread could use some cleanup ;-)

 

No i didn't drill it. Ive realized half the crap he said was bs. And the other half be cautious with. But a few people were reporting good results so i just went for it. Ill see how it works for myself.

Of course i was not having any problems before with my stock pump. I just figured i would install it to have the extra flow and safety. Also i can tune out the difference in fuel pressures before going fi.

 

If you aren't willing to use an external sump setup it makes a lot more sense to use a smaller pump and a booster. The booster is used successfully everywhere else but not here for some reason. You don't want it any bigger than necessary. Not only is it going to be recirculating like a **** in low load conditions, it's also going to suck out the internal reservoir faster at low tank level as reported by dannobre numerous times. It won't fix anything at a low tank level i.e. 1/8 tank even during straight line acceleration as Brettus reported, just the opposite ....

 

Will the ID725 fit in the P1 position?