witepsycho

just installed a boost gauge this morning....and the vacuum is reading like22-26 when im in idle. and i boost about 6-10 (it varies) when i get on it...are these normal readings??

Narfle

iTrader: (16)

10 should be the max assuming a stack engine an dyour idle vaccum seems to be very strong, so i would guess it is accurate

witepsycho

anyone else have any ideas??? also, what is the safest boost i can go on pretty much stock everything....i have a DP and BOV and thats it right now

tom_marsland

I'd say no more than 12.... but if your all stock, stock boost is fine until you try modding things

moehler

iTrader: (12)

does the gauge sit at zero when the car if off?

tom_marsland

It sounds like your boost gauge is working fine. Strong vacuum at idle.

witepsycho

no its a little under 0....an import shop out here by my house said i could probably run up to 15psi....you guys disagree?

1QWIK7

iTrader: (33)

your import shop obviously is talking our their ***..

just said above, i would say 12 is max but why even risk that? 10 is moderate and good enough for stock..

witepsycho

if i wanna raise my boost what other mods should i do??

wrankin

first mod - sell the FD and go buy another car.

first mod (alternative) - go and actually read the sticky posts for newbies and understand *why* you shouldn't run 15psi.

Section8

iTrader: (6)

Yeah, read all the stickys about this car before you start modding it, otherwise you'll blow the motor and be one of those people that claims the rotary is a POS engine.

Stock boost levels is more than enough for most people anyway. I know a guy who's literally made people **** their pants on a road course and he runs 10psi.

MAVrick

oh boy

1QWIK7

iTrader: (33)

LOL yeah

i remember when i went to the sema show and it was my friends first time to ride in my car..the first chance i got, i punched it in 3rd gear just out of nowhere and he was like, O SHITTTTTT!!!

im like thinking, hahah damn and this is only 8psi on non seq twins, what more when i go single??? lol

LOL

witepsycho

why would u say that

Mazda99Nikon

Boost gauges can be out of calibration. The fact that yours sits below zero could account for your flaky readings. Normal vacuum at idle should be in the 17-19 range. If yours is biased downward, I wouldn't be surprised if you are seeing 22-24. 26 seems just too strong. The boost numbers would equally read low, in your case. Stock should show around 10 psi at full boost. Again, if your gauge is reading low, I wouldn't be surprised to see 7-9 psi max. These things are all relative. I wouldn't sweat it. Assuming your car is running in good shape, note what the gauge readings are now. If they change later and the car doesn't seem to be running well, you will know you have a problem to look for. In regard to mods later on, don't go over 12 psi. In your case, 10 psi might already be showing an actual 12, so I'd be careful. Trying to squeeze another 50 hp out of these cars without some healthy engineering advice is invitation to disaster.

BlueRex

Because you're asking all these noob questions about a car that you should have researched before purchasing.

All the answers to your questions can be found by doing a search.

witepsycho

no need to be adick...isnt that was this site is about?? people helping other people...not everyone knows everything like you think you do

sactown_rx7

You can see from my posts that I'm more of a noob than you, but from 2 weeks prior to my purchase I've been reading, and only reading; my posts are in the lounge I think. This site is about people helping others but most topics have been covered in previous threads or stickies, so you're not missing out on anything by doing a search. The problem with starting a whole new *useless* thread is that all this stuff takes up space on some server and bandwidth costs money.

SpeedKing

iTrader: (4)

Not everyone knows everything, but you, have no damn clue, and your ignorance will blow your engine. If you won't take the responsibility and time to learn about it, then you have no business owning the car.

Ideally, on the stock ECU, you'll want to keep boost @ 10 PSI max. At the minimum, an intake, downpipe, and exhaust will put you past that threshold, and to keep you safe, you'd need either a boost controller or aftermerket EMS (e.g. PowerFC, M2 ECU, etc.)

And I agree w/ "Mazda99Nikon". A stock engine, assuming it's running properly should show 17 - 19 PSI vacuum @ idle.

BlueRex

It is, but all the questions you are asking have already been answered. You're just being lazy and not doing any research yourself.

And BTW no need to be rude after all that help I gave you in my guestbook on cardomain

witepsycho

didnt mean it to be rude..i just get on here asking questions and people always have smart *** things to say....i have researched these cars, but im learning more and more as i go. cant learn everything all at once

skunks

you dont need to take the advice of all the other members but just dont come back here crying that you blew your engine and that 7's are unrelible, blah blah blah.

as for a real response to how do i raise my boost... buy a boost controller! that or make one yourself for about 15 bucsk from homedepot or lowes

as for how to check if your boost gauge is correct, buy or rent a mightvac or other brand vaccum/pressre guage to check it.

P.S. what is your idle at? (it should be anywhere between 800-1000) your vac does seem a bit on the high side but boost is normal, just worry if the boost goes over 10 for a stock car and if the vac dipps under 12in/hg (well unless you have a huge port or unless your idling at about 100-200rpm hehe)

BlueRex

Then don't be...

Because you are making no effort to answer your questions yourself. Try searching first and if you don't find exactly what you're looking for then by all means ask away.

No one said you had to, just don't expect everyone to come willingly to your aid everytime you have a problem that you don't want to spend the 10 seconds it takes to do a search