dj55b

iTrader: (2)

Alrgiht as some of you migh of read i blew my engine. And I was woundering if I go with a SP 12a and a sterling carb along with my SDJ headers. What kind of HP numbers am I looking at? Also (I'm hoping that sterling would pitch in on this) will the sterling carb be enough to feed the engine? I was talking to mazdees over the phone and they told me that I would have a huge flot spot? Is this true? Also if anyone know how many mpg I will achieving that would also help.

Now let say I don't go SP (Its so hard to decide when you're on budget :@) but with the same carb and header setup what type of HP and mpg will I be seeing?

I've tried searching but everything that I came up with was mostly Weber Carbs.

Tranquil

iTrader: (1)

Without the street port probably 17mpg and around 140-150 with supporting mods. That's a flywheel estimate.

I have no idea other than you'll probably hit 200 flywheel with a streetport.

dj55b

iTrader: (2)

anyone else?

rbf41182gt

I'm pretty sure that they can mod your carb to suit your needs. Email carl, and he'll fix ya up.

cdrad51

Having had that setup, I'd say 200 hp at the flywheel is a little optimist. As for my mileage, with mec secondaries and my heavy foot style of driving I was getting around 12 mpg. Oh if you go that way don't forget the ported manifold. I believe Carl can hook you up with that too.

dj55b

iTrader: (2)

Are we talking with or without the SP?

dj55b

iTrader: (2)

also did you have the same headers?

dj55b

iTrader: (2)

bump

xceler8x

I'm a bit flabbergasted here..12 mpg with a 1.1 liter motor? I've seen 250hp V8's getting at least 15 mpg and that's with a 4 bbl, headers, etc.

honestly..12mpg?!?!

laundryhamperman

iTrader: (3)

I averaged 13 MPG with a stock port 12a with a holley and RB exhaust. Driving faster only made that number get smaller.....

dj55b

iTrader: (2)

I can prob get better mpg if i stuck a 13b in there for the same amount of power ... its just the 12a is pretty small and to get the same amout of power out it you will need more fuel to feed it and still get the same amount of power.

cdrad51

With SP. I had a slightly larger than RB template's SP. Not the same headers though. I had RB headers.

cdrad51

With a heavy foot style of driving, yes, 12 mpg. When breaking in the engine I could get 18 mpg city, but that was without stepping on it.

trochoid

iTrader: (6)

I can get 23 mpg on the highway, steady cruising, within the speed limit, with my 12A 1/2bp-1/2sp and Mikuni. I can also get less than 9 mpg in town, depending on weather and length of trips.

dj55b

iTrader: (2)

How many ponies are you pushing?

dj55b

iTrader: (2)

Is there a significant amount of power difference between just sp and 1/2 and 1/2? Also what does your car idle at with that setup?

Sterling

-That's because you refused to listen to my jetting recommendations.

You're hard pressed to get 200HP from a cookie-cut SP 12a no matter what carb you put on.
But if you're lucky enough to get that potential, a Sterling Carb will give you the necessary flow.

darthrotary

^ now by cookie cut do you mean a mild sp? i am in the process of a rebuild the a large SP(courtesy of RX7WORLD) and heard good things about your carb, any info you have would be nice or do i have to get ahold of Carl. i saw your website sterlingmetalworks.com but still need more info. can you pm with any info, price or whatever
thanks, Ian

rx7owner

wow that sucks for you guys with 12 mpg ..i get about 28-30 on the highway driving around 115km/h dont know what i get in the city though...never checked it..

cdrad51

No, I think it was DESPITE your jetting recommendations that I was able to get ANY power out of that carb of yours

How's it going, cuckoo case?

dj55b

iTrader: (2)

What's under your hood there?

85rotarypower

Well, I've read in various cases that a streetported 12A will get about 170hp at the flywheel, with supporting mods. 185-190 is probably pushing it on a "template" style streetport. I'm guessing this is what sterling meant by cookie cutter.

Basically, if you manage anything over 180hp with a mild streetport 12A, your doing good. To give you an idea of what to expect, my streetported S4 13B 6 port pulled 150hp at the rear wheels with stock FI system and dirty injectors, thats ~180hp at the flywheel. This is according to the past owner of the engine. I've converted to carb with a good manifold and 600 cfm carb and I'm hoping for 170 to 180hp at the rear wheels, and I don't think i'll have a problem with that.

Sterling

Yes. that's what I mean by "cookie cut".
The shape of the template doesn't account for the 3D of the passage. Someone with a better understanding of flow dynamics, or simply more experience can make the exact same template push 8 or 10 more flywheel HP.
You can feel free to email myself or Carl for any info you need.

Carlos is an idiot. He thought he knew more about carburetion than Carl and I do, and told us how to do our job every single step of the way. Even today he illy represents our product, and consequently holds our "Worst Nightmare Customer 3VAR!" title for about two years now.

...In the end, I think he finally came to realize that it was his own fat 350 lbs havin' *** that was bound to slow down a 2300 lbs car.

Roundabout

iTrader: (8)

^^ LOL Werd up!! I can't wait to do business with you guys! Give me another month or maybe two. Cheers!

lovintha7

I think I can chime in here since I've had both a Sterling, a RB SP Exhaust, and a SP 12A. I was using a little more than mild port job though, so not "cookie cutter". I was getting around 15 mpg and an estimated 180 flywheel HP with the whole setup. The guy who built the motor knew his **** though, so the port was excellent.

BTW, Steling and Carl are both EXCELLENT to deal with, and the tech support is out of this world. Maybe we'll cross paths another day if I get another 12A.