jcgemt2003
Member
- :
- 06 speed6
It shouldnt read vaccum when its off....but when I had my stock turbo in did look very similar to that....dont forget the speed3's boost is lower in 1st and
2nd gear so you can keep traction and steer the beast.
MBC users... Drawbacks of increasing boost using an MBC?
- Thread starter bast525
- Start date
It shouldnt read vaccum when its off....but when I had my stock turbo in did look very similar to that....dont forget the speed3's boost is lower in 1st and
2nd gear so you can keep traction and steer the beast.
Ok so if you have the killer and NO MBC what are the dangers. I just put the killer in today and now the car go well beyond 7k rpms with no fuel cut. But I know that can't be all good. I ordered a CRAP MBC that I'm returning. All that I want to do it LIMIT the boost to say 16 and no more but hold till say 6500. HELP! OR if I have no worries say that too...
pHeeL tHiZ ViBe
Member
- :
- Mazdaspeed6
NO WORRIES 
, the way its set up right now isn't dangerous or bad for your motor really. it will spike occasionally but nothing thats damaging. to limit it to 16psi just toss in your MBC, and you shouldn't spike much after that
, the way its set up right now isn't dangerous or bad for your motor really. it will spike occasionally but nothing thats damaging. to limit it to 16psi just toss in your MBC, and you shouldn't spike much after thatNO WORRIES
ok cool. I was really concerned with the boost defender that I would hurt somethign before i go some EMS in place. thanks! (yippy)
That's the problem, your needle isn't adjusted correctly. If you're reading -2 vac wen the car is off, means you are probably reading 2psi less of boost than you should be.
I had to take mine apart and fix the needle too... very hard to get apart but was worth it.
Also, if you're getting any rattling sound or a shakey needle, use a very small restrictor in the line... made it work perfectly for me.
If it's a prosport, you have to pry up the lip on the metal 'ring' that holds the clear plastic lens on to the gauge. It's to do without damaging it, so might not be worth it for you. I was using an 'eyelid' sort of thing that mrlilguy had included with the gauge... basically a 'hood' that would help shade the gauge. With that installed, the damage to that metal ring was not visible.
If you take that off, you can adjust the needle easily. I adjusted mine to sit right at 0.
Laloosh what track do you go to? how far is it from Chesapeake? When are you going again? I really want to get down to the track someday soon....
If you take that off, you can adjust the needle easily. I adjusted mine to sit right at 0.
Laloosh what track do you go to? how far is it from Chesapeake? When are you going again? I really want to get down to the track someday soon....
http://www.mazdas247.com/forum/showthread.php?t=123684433
what do you think now ??
a MBC will work just fine as long as the ATP defender is used.
you have to watch the A/F though. the fuel is added based on MAF readings, so it should stay close to normal. the problem is you can still run out of fuel with a large spike, or potentially have too much timing in place for a higher boost level.
jcgemt2003
Member
- :
- 06 speed6
Im pretty skeptical about those numbers on what his mods are.
i am also, but he has a dyno graph. it is a dynojet, and even if it is a little off, how far off could it be ?? the A/F is what scares me ! he claims a wideband showed numbers in the 11's, but the graph shows 13's !!!!
but the fact is a MBC used with the ATP defender WILL 100% add power.
if you are sensible about it and have your A/F checked, you cant go wrong.
my car bone stock gained like 20HP/50TQ at 18psi with a MBC. and that was at renound turbo tuners AMS. the guys there are dicks, but they are great at what they do.
the owner of that dyno graph has also gone 12.9@106 on slicks with the same mods. he has the slips to prove that as well ! 12's for $500 in mods.
but the fact is a MBC used with the ATP defender WILL 100% add power.
if you are sensible about it and have your A/F checked, you cant go wrong.
my car bone stock gained like 20HP/50TQ at 18psi with a MBC. and that was at renound turbo tuners AMS. the guys there are dicks, but they are great at what they do.
the owner of that dyno graph has also gone 12.9@106 on slicks with the same mods. he has the slips to prove that as well ! 12's for $500 in mods.
