Sorry about the double post ^.

 

nocab,

Tire spinning is a very, very gross measurement of power but I would expect the power meter to be a decent indicator. Is it based on an accelerometer or vehicle speed, from memory I'm thinking an accelerometer? It's easy to fool one but if you use them correctly they can give good results. I used to use a vericom and it was very accurate if I was careful. Most important thing is not to give any abrubt changes, e.g., don't shift during a pull. Any quick motion can throw it off, you want it to get a nice, smooth reading to be accurate. E.g. go straight through 3rd or 4th just like a dyno pull.

Sounds like you are making good power. Still, you shouldn't need such large injectors for that power level. You Denso pump is almost certainly the problem, I've seen these max out on 350 rwhp before! They require too much power for the stock wiring and they flow about the same as the $100 Walbro or $200 Bosch pump (but those pumps don't require as much current to do their jobs). I'd bet money on your fuel pressure dropping. When you confirm this is the problem, better wiring straight from the battery on a relay helps, a better pump can help too.

Like you say, bumping your fuel pressure could also help, but that isn't going to work if your pump/wiring combo is dropping pressure already. It will only make the problem worse. So you will have to fix your fuel drop problem first, then you could try raising the base pressure after that.

Once you fix te problem, if you have to, go to 850cc primaries or around there, or do a rising rate regulator if you have the pump for it. But don't go much bigger than 850cc pri unless you want major drivability problems. For low throttle, I had the choice of 10 a:f or fuel cut from injector times being too low (they would close completely). I'd say anyone with majorly large primaries must be driving a track-only car, or a real pain in the *** street car.

Wade

 

i've seen and driven in a car with 4x1600cc injectors. 13BAce's T78 Vert with a WOLF 3D... idled fine

 

so the can the wiring be upgraded, wade? is it because of to small of a gauge wiring? i'm learning and if i appear off just explain it to me.

luigi

 

I dont see any advantage to running 1600's as primarys especially on street cars. You simply don't need that much fuel for low load conditions.

You will not get a good spray pattern with such a large injector using very small pulse widths. (rotaries tend to be more forgiving over piston engines. Injectors take big on a piston engine can be a nightmare)

850/1600 is very capable of supporting over 600hp. I dont' see why you need 1600's all around.

Fuel Volume is very important and often overlooked. Make sure your running bigger fuel lines and a big pump. This is what i believe the problem is in nocab's car. As already stated he's running a small pump.

 

i'm running a SX external pump and SS braided fuel lines from the sump in the tank to the engine another winter project might be adding another SX pump.... you can never have too much fuel

 

Right on Vosko...

Fuel is one area where it's better to have to much then not enough.

Good idea getting another SX pump... I have seen those max out on hondas very easily and needed to add another one. If you want to use a big single pump instead of dual, look at the pro-series aeromotive or weldon 2025 or better yet 2035. Those are some monster pumps.

 

Haha, 5 months ago when I installed the Denso, it was overkill... (I mod too fast).

Car was bone stock when I bought it in Jan of this year (2002). I've been busy for a hobbie, project car...(see sig)

K

 

speed_nyc (roan) has a weldon pump on his car. OMFG is it loud. i cannot deal with a pump that loud. i will just use two SX pumps... my car is a street car..... i'll see i'm gonna go racing today and sunday after that i'll try to pay off some debt then work on spending more money LOL

 

maybe you could do the JDM thing. put two walbro pumps in the tank ?

 

At 3000 RPM?

 

divide by 3

 

i just say your sig, what's an hid4less stage 2? how much and got pics?

 

www.hids4less.com - they changed their website a bit since I bought my kit. Basically HID bulbs that fit in the stock location, remote ballast.

(bad pics here)
http://flathat.woodstream.net/RX7/HIDs/

K

 

how did you plug up the 1600s? do i need to cut and splice the wires for them? what color connector goes to the primaries and secondaries(new harness)? thanks.

 

Anyone remember the limits of the stock fuel lines? I'm thinking that may be playing into my fuel delivery issues as well...isn't it somewhere around the 500rwhp mark, fuel lines need upgraded?

Looks like I'm gonna do that too...so I can be ready for some 10's next spring... (I know vosko is on his way, and damned if I let him beat me there!!!)

k

 

LMAO @ nocab

 

anybody?

 

i have a haltech i dunno LOL

 

WOW, I didnt realize with the Haltech you didnt have to hook up your injectors lol

STEPHEN

 

he ment to type "it cost $XXX.00 to do that"
j/k lmao.

 

on a haltech you don't have to do anything but plug them in

allrotor has a PFC right ? that's what i meant. i don't know what you need to do to make them work on a PFC... new harness, resistors, yadda yadda

 

i do have the pfc. the plugs on the stock secondaries are a different shape than the 1600s i have. i was wondering which connector on my harness is used for the secondary injectors. ---j