moremazda

iTrader: (4)

Have you tried Gruntled Very good DHLA info.

Ryan

Hyper4mance2k

iTrader: (40)

how short are they and how much do you got a pic?? and are they the full flare ones or just partial

RotorMotorDriver

iTrader: (1)

Well, this is the jetting for a stock port 12A using a DHLA that I got from gruntled.com:

Main Emulsion Tube #7772.8
Main Fuel Jet #230
Main Air Jet #230
Idle Holder/Emulsion Tube #7850.4
Idle Jet #75
Accelerator Pump Jet #90
Needle and Seat #300

-OR-

230 main fuel
230 air correction
7772.8 emulsion tube
75 Idle fuel jet
7850.4 Idle jet holder (air jet)
.1 auxiliary venturi
95 starter jet
90 accelerator pump jet

Now, someone just translate all that for me and Id be happy .

~T.J.

Hyper4mance2k

iTrader: (40)

i mean are they full radius or exponential?

680RWHP12A

what i would do is take some original ones and shorten those, as much as you would like

Hyper4mance2k

iTrader: (40)

okay cause i'm looking for some fullradius ones thanks though

Hyper4mance2k

iTrader: (40)

so jet sizes right?

RotorMotorDriver

iTrader: (1)

Yeah, whats up with no one posting this info?

Right now I have as follows at 3.5 PSI and it seems to work semi-ok:

180 Main
F-11 E-Tubes
F-9 65 Idle Jets
160 Air Corrector (I think I need a different one)

~T.J.

Hyper4mance2k

iTrader: (40)

i've got no lue what air corrector i havve how do i check?
main f11 180
idle 65 f8 i need much bigger i think
i think i have a 36 venturi? wow now seeing what you have on your 12a i feel i need to go bigger on my jets.. expecially on my idle jet cause i have to have the car running really rich or it leans out at cruise..
RMDriver where did you get your jets at i can't find idle jets any where. do you have any extras?? i need bigger

RotorMotorDriver

iTrader: (1)

I have 36mm venturis also. I knew I was forgetting something.

I got all my jets from Robert at Rotary Shack. I dont know what Im doing when it comes to jetting, so I dont know if Im running rich or lean or what. So just cause mine are close to yours doesnt mean their even right for my engine . Oh, and no extra jets that you would use, sorry . All my extras are smaller than what I have in there now. I still need to mix and match and try to find the best combo.

~T.J.

PS - What kinda air/fuel ratio gauge do you have? Any details on the setup? Im thinking thats the next thing Im getting.

Hyper4mance2k

iTrader: (40)

i've got an autometer guage in a VDO gauge pod mounted on my A piller it don't look too bad and since i've got a 13b i used the RB gsl-se header with a location for an O2 sensor and i just used the stock one...

RotorMotorDriver

iTrader: (1)

Oh ok. I went to a muffler shop, they told me $32.50 plus tax to get the bung welded in, plus $20 for the sensor. Then I need the gauge (~$60), and the pod (~$30). It could be more than its worth, haha.

~T.J.

Hyper4mance2k

iTrader: (40)

well if you go to a rice shop yu could haggel and get a gauge for like $50 if you go with me to Dan fast in kynnwood i could get you a deal i've got a friend there and he hooks it up as long as the header is not on the car.. and i got my pod at Bow wow for like 15-20.. it think its plenty worth it.. the gauge has been in every car i've had and seens very worth it to me..

Hyper4mance2k

iTrader: (40)

made tuning the carb that much easier

RotorMotorDriver

iTrader: (1)

Hmm, well Im in Lynnwood all the time, but my header is on the car. Installing the stuff isnt my problem (I would rather do it all myself anyway), its just getting the **** cheap.

~T.J.

EDIT: Is your pod the universal one? I was thinking about getting one of those, but hows the fit? I want it to look good, and I was thinking of just getting the 2nd gen one and heat gunning it, or if all else fails, Ill just buy the one MADE for the 1st gen. Hell, thats actually the cheapest one, I just dont have a credit card to order it, haha .

Hyper4mance2k

iTrader: (40)

yea its universal it looks fine to me not as good as one made for a first gen would. and who makes noe for the first gen?? i've never seen one??

RotorMotorDriver

iTrader: (1)

www.gaugepods.com or more spceifically www.gaugepods.com/rx7.htm Theyre not too expensive either. I was told by a little birdy that they fit the 81-83 cars better than the 79-80 or the 84-85 because of slight differences in the A-Pillars, but whatever .

~T.J.

RotorMotorDriver

iTrader: (1)

Oh yeah, by the way, I re-jetted my carb. I think Im on to something...

36mm Venturies
F-9 65 Idle Jets
145 Main Jets (again)
F-7 Emulsion Tubes (also again)
160 Air Corrector

Basically the same setup I started with only bigger idle jets and real fuel pressure and the damn thing is fast again . I also have found out that I have an interesting ignition problem that Im trying to sort out thats hindering my performance quite a bit, but after thats fixed, I should be good to go "jetting" again .

~T.J.

RotorMotorDriver

iTrader: (1)

Ok once again, I played with my jetting trying to get a little more out of it, and to no avail. I know its running wrong the way it is with the stuff I posted above this. I talked to another person at another place, and they say for a 12A to run:

36mm Venturies
180-195 Main Jet
F-16 Emulsion Tube
160 Air Corrector
F9-65 Idle Jet
45-65 Accelerator Pump Jet
0 (Closed) Pump Discharge Valve
300 Needle & Seat

As you can see, the jetting offered by these two places seems prettly close. Looks like Im gonna try and get me some F-16's...

~T.J.

Hyper4mance2k

iTrader: (40)

damn that seems like alot of tuning you've got going on there.. i need a jobby job so i can buy somme jets myine runs and all it just leans out at cruise i need bigger idle jets oh well i'm not driving much now account of gas prices and 9 mpg

Hyper4mance2k

iTrader: (40)

So does anyone happen to have some idle jets or is diverse in the fine art of tuning a dcoe? I'm pretty good I'm just really broke and trying to figure out for myself whats going to be the best aproach for me. right now I'm running 65 F8 with 5-6 turns out. Its really rich and really lean. I think the problem is i need better fuel delivery and a more consistant pressure. So i'm thinking holley pump and regulator like 110gph 4psi. with 60 F10 or 65 F9's. So if anyone even knows what I'm talking about feel free to chime in.
Thanks,
Train

Hyper4mance2k

iTrader: (40)

WTF doesn't anyone here know anything about carbs??? or what gawd this is pathetic!!!!!!!!

680RWHP12A

use 65F 9 idle jets , that will work the best!

Hyper4mance2k

iTrader: (40)

see thats what i was going to do, but TJ said he's still a lil' lean and he's running a 12a. I'm 13b wouldn't that alone mean i need more fuel?

jayroc

I got a 12a stock port with a 45DCOE. I haven't bolted it up, yet. I just got it from a guy with a street ported 13b. The jets seem a bit large and I need to start from scratch as I don't know anything about tuning these carbs. (What a convieeeeeeenient time to start this thread...)
I got a carter fuel pump and a holley regulator. I'm going to buy a guage next week and try to weld in a o2 bung to use with my haltech halmeter.
BTW, what fuel pressure is good with a 12a stock port? I noticed someone mentioned 3.5psi, but I've heard 4-4.5psi also. How do I know which to use with what jets?