moehler

iTrader: (12)

Just wondering if 1300's will supply enough fuel for a single turbo setup? I know 1600's are the way to go, but I'm just curious if anybody runs 1300's. Thanks

-Matt

phlanigan

Works well with smaller ones. I hit around 75% duty cycle at 15 psi using a t04e.

Wargasm

You CAN do it, but only if you're on a smaller turbo. On my T04S, I barely get by with 550/1600.

95R2-89TII Ground Zero

again, smaller turbo. My buddy uses 1300's and 700's in his TII on a t04

jeff48

550's and 1300's yield 400RWHP at 17 psi for over 25K miles. Nippondenso in tank fuel pump upgrade. Great maps. No problems. Inj Duty cycles at less than 72% at WOT.

BTW I have a friend with a huge turbo running 850s and 1300's at 19lbs. Again, its all about the maps and the fuel delivery system.

Gargamel

Jeff, I've got 950's. Oh well.....

Anyways, I have no problem running 19 lbs on my HKS T51R KAI with a street ported motor. 1300 sec, 950cc prim injectors. I only feel safe because the best tuner in the midwest is tuning my car, Jeff48

moehler

iTrader: (12)

thanks for the replies . jeff48, what turbo are you running?

jeff48

DUH...........

I knew that...seeing as how I just programmed the PFC a few weeks ago. I must be getting old. HA. Birthday last Monday made me really old ----56.

jeff48

Apex'i RX-6. Original design.. not huge but certainly large enough to be able to put down 400+ RWHP at 17psi, and 72% inj duty.

jeff48

bad post

Snook

iTrader: (12)

when I had 1200s and 550s I would see about 87@ duty cycle @380rwhp

Matt I'd suggest 1200s because they aren't bored as big and might be more reliable. Then use 850s for your primaries. Then you'll have enough for ~425rwhp safely. Another important thing is to get low mile injectors to bore out and have those cleaned and get low mile 2ndaries for primary and also have those cleaned. I used RC to clean my primaries. I'm now running 1600s and 850s at very high duty cycles.

Yanni

moehler

iTrader: (12)

Thanks for the advise, Yanni. I have the 1300's already in my car. The reason I posted is because I'm considering going single in the near future and I wanted to know if my current setup is good enough to run decent rwhp (~400) with a single.

Snook

iTrader: (12)

Our buddy Rusty at the tuning session this past weekend made 412rwhp@17psi on pump gas with 1300s : ) so there you go...

Still a great idea would be to get 850s. Garfinkle mills the stock rail for like 10 dollars and pick up some 850s and have them cleaned. Just for insurance during a overboost. If you are maxing out your injectors already then they won't be able to dump fuel to try to save your engine during an overboost.

Beast From The East

The difference between the guys running 1300s and 1600s on the medium and above turbos is headroom and ability to scale up to the really fun psi levels. I'm using Wargasm's map, but modded for 1300/550s (actually, per RC my secondaries flow 1350, but I left it set at 1300). Using the T04S, I run 15 lbs on even the lowest premium gas (Kalifornia 91) and get to 400 rwhp, running duty cycles that have already been published (say ~ 80 to 85%). However, on 1300s you have no where to go above that, so you don't get to see what good things can happen at say 20lbs when you have race gas and more injector to get the fuel there.

This is why I plan on going the 850 primary route with 103 octane, so I can at least go to 18 lbs. AFter that, I don't think I've got the fuel lines, or fpr (which are still stock, with a Walbro pump).

So, to summarize what others have said, yes you can, but you can't go any further than ~ 15 lbs on pump gas safely. If you use race gas and raise AFRs you might be able to squeeze out a bit more, but why do that and incur the risk? (EDIT - another cheat you can use is to raise fuel pressure, which brings along other risks but is a way you can squeeze a bit more out of the 1300s).

rusty's_silver_bullet-7

yeah - true - but,

I'm seeing inj. duty cycles up over 90% at high rpm & high boost....

I'm a little concerned for the longer term viability of this config.

so.... I'm sending some used 850s off to RC to have checked and flow tested to replace my current primaries (550s).

I hope this doesn't effect the fabulous map and driveability Steve K. developed for me last w'end...

Snook

iTrader: (12)

yeah thats why I suggested for him to get the 850s
However, 90 isn't that bad just for high rpms so I'd go ahead and ask Steve what he thinks it will do to your map and then decide if it's worth it or not. I'd stick with how it is....I saw 98.5% duty cycle every run at the track wednesday night now there's a problem lol

maxcooper

Here's a web page I wrote that lets you play with some numbers to estimate your fuel system capacity and fuel pump requirements (flow @ pressure):
http://www.maxcooper.com/rx7/how-to/...tem/calcs.html

-Max

rusty's_silver_bullet-7

Thanks Max - great site BTW

According to the calculations on your site, I'm just about at the limit for my set-up which is what I expected.

As I am already investing in some RC'd secondaries (850cc) to place in primary position, the only question I have is the Fuel pump. Currently I am running a Supra TT fuel pump in my FD.

Do you have any idea what the capacity of this pump is?

maxcooper

Check out this page -- it is well narrated and pulls fuel pump data from a bunch of places (including RC's test of my BNR32 pump):
http://www.stealth316.com/2-fuelpumpguide.htm

-Max

Snook

iTrader: (12)

rusty I believe the supra pump flows 280lph
the m2 boshe racing pump that I have is the best intank pump in my opinion. I think i read somewhere that it flows 310lph but I could be wrong...

BTW where did you get your thin walled spark plug socket? I still have those greddy racing plugs in the car cause I cant take them out haha!

Yanni

rusty's_silver_bullet-7

Thanks Yanni, Got it from Pettit - I believe. It's been a while and I can't really remember but, I'd try Pettit first.

How much for the M2 bosch pump?

GSB

Had a quick blast today with a T78 setup running 1300 secondaries, i think the revs were at 7300 and the the INJ DUTY was 87.2 % in 3rd gear so not too bad i guess??

Snook

iTrader: (12)

Rusty their email is on the webpage
http://www.m2performance.com/

See if they still sell it

BoostorLose

Now I know most people just pop in 1600cc secondaries and leave the 550cc primaries, but what if you used 850cc primaries and 1300cc secondaries?? I'm confused as to go with this or 850 and 1600. I am running a TO4R, so I think the 850 and 1600 would be the best route.
Mike