i've been wondering if i put an TII fuel pump in my NA would it gane any hp out of it?

thx-dom

 

i don't think so my n/a runs rich enough as it is

 

It would only help if you need it, ie porting on the engine. Otherwise, too much fuel causes a loss in hp, not a gain.

 

0oo0h so so if i get a street ported engine it would help a little

 

even if you have a street ported engine the n/a fuel pump is good for more power than a simple street port n/a can provide. Infact you would loose power, because you would be running to rich with the tii fuel pump.

 

oh kool thanks guys

 

The TII fuel pump does not overrun the N/A pressure regulator. You will not run any richer, it will not change anything at all really. You only need to change the pump when your putting down some much more serious power than a stock port engine would do.

 

Whoa, whoa...whoa. Lets stop right here and set things straight. The NA fuel pump is rated at 1.3l/min which is 78lph. The TII fuel pump is rated at 2.2-3.3l/min which is 132-198lph. IF YOU HAVE A FUEL CONTROLLER, A FUEL PRESSURE REGULATOR AND BIGGER INJECTORS THEN A HIGHER FLOWING FUEL PUMP CAN ADD A GREAT AMOUNT OF HP. My step up is an APEXi Super AFC 2, an SX fuel pressure reg. , 2 Top Feed 720cc sec. injectors, stock prims. 30+HP on a NA with this set up...guess about 75% duty cycle on the secs. No rich idle either.

 

You will NOT add power on a stock port engine..
Not even close... You need to have done some serious porting before you'll need to add fuel.

bigdv519, do you have back to back dyno runs to prove your 30+hp?

Because sorry, its not true (unless you have a heavily ported engine). You will also not need larger secondaries until your in the 200/250hp region.

 

Gimme some of that crack you're smokin'



-Ted

 

Allow me to retract my previous imprudent statements. Thanks you. But back to the original, will a TII fuel pump dropped into an NA make any power. Not if you just put in the fuel pump. Now maybe if you wanted to run a wet nitrous system, then the TII fuel pump still wouldnt "make" hp, it would, however, it would help you from causing a lean environment due to a lower flowing pump. Am i know correct???

Im very sorry for having to say this, but one of my buddies figured if he drop a Walboro into his <looks both ways and whispers> crx, he would get hp. Well he didnt get any because I told him that adjusting his FPR higher would do nothing to make more hp. The car had already been tuned, so increasing fuel pressure didnt do much but make a richer AF ratio. But now when he adds the wet nitrous system, he wont be as worried about a lack of fuel pressure dut to a stock pump. Please dont bash me for using a crx as an example. I know i deserve it though...hehe...laters guys

 

Adding more fuel does not ever make more power. Adding more fuel only allows you to increase the airflow, which will make more power.

Pure BS. Any power you got from this set-up was purely from leaning the mixtures out with the S-AFC (assuming it's properly tuned), which would've worked exactly the same without the big injectors and FPR, which were both totally unnecessary. It certainly wouldn't have been anywhere near 30hp either.

BTW, injector duty cycle is measured, not guessed, and the primaries and secondaries fire at the same duty cycle. If you really did have that injector combo at 75%, your NA engine would be drowning in fuel.

 

Did I properly ask to have my previous statements dismissed. I thought I did but just incase I didnt, ALLOW ME TO RETRACT MY STATEMENTS FROM THE BEGINNINg OF THE YEAR. Obviously, I didnt know what I was talking about. I knew nothing about duty cycle or proper tuning methods on an NA RX-7. I now know a little more, but none the less, still not enough!!! I know enough to know that I sounded like a fool and I apologize to those that were swayyed in the wrong direction by my foolish, unproven, and incopetent comments.

 

unless you guys are making over 200 at wheels dont touch the stock fuel system, unless you are replacign a broken part. the only thing you should be woried about is havign too much fuel in an NA, if anything get the afc and lean it out some, properly with a wideband af meter.

 

Thats what CarBoy in Houston did for me. They leaned out my idle, and actaully increased my fuel from about 4500 rpms to redline. My SAFC shows a 12% increase in fuel (I think they increased my duty cycle, can anyone prove me wrong). Thats also because my old dyno showed a max hp at 5500 rpms. Nows its at 7K but only 10 higher than 5500 rpms. Answer for this: OLD ENGINE WITH AN UNBELIEVABLE COMPRESSION CHECK...79 psi in both rotors. Others have told me that they cant believe my seven even turns on!!!

Im sorry for not letting you know my max hp. Kinda embarrassed. Lets just say Im in the range of an old *** crx or something like that.

I got this question though.
There is a feller somewhere up north that has a GTUs running a 13.07. He has an upgraded pump(Denso I believe), 720 prims and 1600 secs, a SAFC, remapped ecu, jet v force fuel timing recal, and runs Sunoco 102 octane racing fuel. He also claims his duty cycle to be around 60%. If increased fuel doesnt help, then why did he do it, and how is he running 13's?

 

1) turbo
2) supercharger
3) NOS
4) bridge or peripheral porting
5) full of ****


-Ted

 

I didn't actually realised you'd dug up an ancient thread just to retract statements that nobody would've remembered if you hadn't bothered. Now you just look silly twice...

Even mildly modded NA's run very rich under full load, and gain power from having fuel removed. Adding 12% more is just nuts. Do you have any idea what the AFR was at high rpm? Is it on your dyno graph?

Injector duty cycle is not something you adjust, it's simply the injector open time divided by the engine cycle duration. It's a number we calculate to see how hard the injectors are running, and is constantly varying as load and rpm vary. The ECU calculates the amount of time to open the injectors each cycle, and the S-AFC sends an altered airflow signal to the ECU to make it open the injectors longer or shorter as required.

Without even seeing the car, it's obvious he's running forced induction. If you put those injectors into an NA there'd be fuel pouring out the tailpipes even with the S-AFC turned down as far as it could go.

 

Maybe some other people should do some research and check out fc3s.org. The guys has time slips posted. The engine however is ported. I failed to mention that. Anyone care to do a little searching???

 

Well my dyno graph doesnt lie. I did get about 14 more hp at 7k rpms WITH MORE FUEL. I thought it was a little wierd. I must dig that thing up or go back to CarBoy and get another printout and post it.

As for your "other" comment. My buddy has a 500hp truck. Is it fast, hell no!!! Its a big rig!!! MAYBE YOU SHOULD SEE THE CAR BEFORE YOU MAKE "SILLY" COMMENTS. Just maybe. Or maybe you should pm him and ask him where his "forced induction" is. His intake AND HEADERS look like they go to an NA. But your the smart one here, so go do your research.

Hey RETed, do the same.

 

You would need your head examined if you thought even a wild NA 13B needed that much fuel. Whatever the facts are, the info you posted on that GTUs reeks of the brown stuff.

 

Uh, what the hell did I do???

I replied with very valid reasons why the car went that fast.

What's wrong with that?

Do you have some super secret method of extracting almost a 12-second time slip out of an FC?

Oh wait, I forgot another one...super lightening of the FC3S chassis down to under 2000 lbs.

I wasn't making any fun.
These are basically your only options of getting the car that fast.

I think you better LOOK at who you're arguing with.
Right now, you're not looking too good.
Why don't you ask the peanut gallery?


-Ted

 

you do realize who you just said that to right?

 

I have a TII fuel pump in my NA... it's sitting in the driver's side bin in case my stock fuel pump ever dies on me. It's not going in the tank unless my current fuel pump dies on me, or I suddenly end up with a heavily ported or turbo engine in my car.

-=Russ=-

 

This thread should have stopped with the above answer by the white guy. You'll never notice ANY difference if you put a turbo pump in a non-turbo. As in NO difference in afr one way or the other. If you've a spare pump that is from a turbo, don't ever hesitate to install it if your original n/a pump goes **** up.

 

Why would the stock TII use the resistor pack if the FPR is capable of keeping the entire flow of the pump in check?

-=RUss=-