who has the fastest sohc here?

mazdamx3sohc · Post by **mazdamx3sohc** » November 4th, 2006, 5:15 pm

can someone talk to me about it i wanna learn there setup

Yoda · Post by **Yoda** » November 5th, 2006, 12:01 am

N/A or F/I ??????. The really fast SOHC are the old 8V guys.

Gottagofaster · Post by **Gottagofaster** » November 5th, 2006, 2:08 am

Limegreen mx-3 is building a fast SOHC....tlak to him

mazdamx3sohc · Post by **mazdamx3sohc** » November 5th, 2006, 8:42 am

well i plan on getting gs injectors, alternator and upgrade my maf and throttle body what kind of hp do you think that will give me?

torpedan · Post by **torpedan** » November 5th, 2006, 11:25 am

Maybe 3-4 assuming the injectors dont cost your more power than that.

Boris · Post by **Boris** » November 5th, 2006, 1:05 pm

gs injectors fit the sohc? I know BP injectors do, but I didn't know about the GS

mazdamx3sohc · Post by **mazdamx3sohc** » November 5th, 2006, 1:21 pm

its all in the 4cyl faq the interchangability guide

Limegreen mx-3 · Post by **Limegreen mx-3** » November 5th, 2006, 1:24 pm

Boris wrote:gs injectors fit the sohc? I know BP injectors do, but I didn't know about the GS

doubting this statement (gs injectors fit the sohc) Boris ur right WTF.

GS injecters will not fit the sohc fuel rail but the protege LX/GT will plug & play baby.

Yoda · Post by **Yoda** » November 5th, 2006, 1:31 pm

mazdamx3sohc wrote:well i plan on getting gs injectors, alternator and upgrade my maf and throttle body what kind of hp do you think that will give me?

GS injectors??? from a V-6? the problem here is that the V-6 injectors are side feed where the B- series engines use a conventional top feed injector.

For your other mods, unless you balance out the flow on the other side of the engine, you will see a slight loss of power on the bottom end with minimal gains on the top end.

The trick to tuning a SOHC is that bigger is not always better and air velocity is the key. Also the stock tuning of this engine and any SOHC in general, is for bottom/ mid rpm torque and not big HP numbers. The cam is like a mechanincal program that tells the engine that it will be a stump pulling tractor motor or a high revving motorsport powerhouse. For the B-6 SOHC Mazda tended to lean toward the tractor side so the OE camshaft grind is going to be performance brickwall.

Limegreen mx-3 · Post by **Limegreen mx-3** » November 5th, 2006, 1:34 pm

mazdamx3sohc wrote:well i plan on getting gs injectors, alternator and upgrade my maf and throttle body what kind of hp do you think that will give me?

Not very much even if u put

90-94 mazda protege LX/GT
injecters
60mm trottle body
Vaf flows a little better than the sohc vaf. why settle for that when u can get the bigger better vaf from a 2nd gen RX-7

2ng gen FC RX-7
VAF

and yes the UDP form the dohc 1.6 mx-3 the aftermarket will fit on the sohc u'll just need to buy 2 new smaller miro belts so that it all fits.

even with these getto mods u still won't get a faster sohc mx-3 fastest i ever got my sohc down the 1/4 mile was a 16.99 4 years ago and i was never able to get that time again. when i put the sohc back on 17.0-17.1 was the best i was able to get.

Limegreen mx-3 · Post by **Limegreen mx-3** » November 5th, 2006, 1:48 pm

Gottagofaster wrote:Limegreen mx-3 is building a fast SOHC....tlak to him

well that i am but change of plans iam doing both a sohc and a BP but going boosted on both. i dumped the all motor BP project. my black mx-3 that i was going to use well the frame is jackup so iam getting rid of that and looking for a 92-93 mx-3 so that i can contuine with the turbo sohc projec. for now thats on hold untill i find a body get a 50trim turbo i know its big but am using a standalone and iam not much of a big fan about quick spool iam curius about how much power that sohc can make. i'll get to that in a month.

I but the BP back in my white MX-3 and boosting it with what i posted below using a SC61 turbo tec II all kinds od goodies i should get that boosted by the end of the week and its one a bone stock BP ric@racingmazda made 451whp on a stock BP. the TECII is wired up just need to boost it. i know am doing a crazy setup or at least u guys think i am but am here to make power and am not doing it the cheap way. i'll keep u guys updated on the BP and pic as well.

Boris · Post by **Boris** » November 5th, 2006, 3:41 pm

mazdamx3sohc, if you're interested in making the sohc a little faster you can also put a BP ecu in. it's plug n play, it raises your rev limiter and will give you some more power too. My mx redlines at around 7500 now.

Projectmx3 is selling one: http://www.mx-3.com/phpbb2/viewtopic.php?t=55208

Hope this helps. If you need a BP throttle body, I have one I can sell you as well. Shipping wouldn't be too cheap but I can hook you up with a good deal if you're interested.

10secSim · Post by **10secSim** » November 5th, 2006, 4:33 pm

I get about 400 Km on a tank and a 4 DOHC , standard with a cold air intake only

94blaze1.6 · Post by **94blaze1.6** » November 5th, 2006, 5:24 pm

10secSim wrote:I get about 400 Km on a tank and a 4 DOHC , standard with a cold air intake only

Wrong thread bud

Bochek · Post by **Bochek** » November 5th, 2006, 10:36 pm

mazdamx3sohc wrote:well i plan on getting gs injectors, alternator and upgrade my maf and throttle body what kind of hp do you think that will give me?

gs injectors don't fit.
a bigger alternator will = less power.
upgrade MAF and TB will get you still 5hp short of what you lost putting in a bigger alt.

and i still dont understand why everyone upgrades there alt. I am running a carpc, full sterio system (2 amps and a x-over), 1kw power inverter, and a bunch of other power drawing goodies on the stock alt, no problem.

in my optinion you would be better off leaving it alown, or like Yoda said, get a regrind.

You might also gain by retarding cam timing, to bring the torque curve into a more frendly area, i dont know how much you like to rev your engine but i tend to keep it <6k so this is a mod im looking at doing.

Besides that, its just easy to swap a bp. bpt. or b6ze.

- Bochek