How-to: +2psi for a cheap $5

[FlyinMSP]

http://www.msprotege.com/forum/showpost.php?p=1121314&postcount=7

If we are going as far as to add springs to the wastegate, why not just do this? (see link). I haven't done it myself because I bought the MBC before I saw it, but what is the deal?

Seems like this should have put Joe P out of business LOL!

Well... take note of this comment :

"Also doing this makes the rear mount seem like a walk in the park"

Besides, shortening the rod will void your warranty

 

[Velocifero]

Success. Well it took me about 25 minutes, not including jacking the car up to put it on, I found it pretty easy put it on from under the car onto the lever off the control arm and then pass the other end of the spring up to the top then go up there and pull it onto the acuator shield. It took me two tries, b/c I didn't loop the lower hook enough and it slipped off. Only happened once. So I got about 1.5 psi increase. thinking about shortening the spring a touch and go up to 2.5, not right away, I'll play with this for now. Thanks for the help and the info.

 

[SpeedBeaver]

Just wondering, is anybody backing up this mod with colder spark plugs? Personally that`s what I'll do, but it's just me.

 

[Velocifero]

Just wondering, is anybody backing up this mod with colder spark plugs? Personally that`s what I'll do, but it's just me.

I have new copper plugs on.

 

[SpeedBeaver]

I have new copper plugs on.

What`s the model # you have? I'm looking for something but there is this big debate about gapping and everything... and don't give me the link to the spark plugs guide... I already have it.

 

[orphman]

The term we use locally is jerry-rigged. If people are too cheap to buy a MBC, they should not buy a turbo car and want to mod it. Hell you can even make a cheap MBC with Swagelok parts. That would be much-less rigged, and much more functional. If your mod works, then it works, I just don't know if its "how-to" worthy. Kinda like:

"How-To keep your MSP lip and ground effects from falling off"

Buy duct tape from your local hardware store part # 123xyz
Tape the top of the ground effects to the car.

It works...... but looks like s*** and once the tape goes bad or falls off then it wont work.

Functionality is only one factor for the how-to section. Quality and reliability are the others. Sorry to knock it man.... good pics and all, decent instructions, just not a good mod by any means.

lol lmao

 

[Velocifero]

What`s the model # you have? I'm looking for something but there is this big debate about gapping and everything... and don't give me the link to the spark plugs guide... I already have it.

I'll get it for you when I get home, I still have the boxes. they are NGK, I got them for free too, back when I got my Injen.

 

[jurgs01]

Denso IK22 iridium plugs. Expensive, but they last a lot longer and are more reliable than copper. They come pre-gapped to .032" I believe.

 

[Velocifero]

Denso IK22 iridium plugs. Expensive, but they last a lot longer and are more reliable than copper. They come pre-gapped to .032" I believe.

I am not sure, but I was told that copper is one level cooler than those. I don't know though.

 

[jurgs01]

I am not sure, but I was told that copper is one level cooler than those. I don't know though.

IK22s are the same heat range as the zfr7f NGK copper plugs. Both are one heat range cooler than the stock MSP heat range. The stock MSP plugs are PZFR6F plugs I believe. The "6" is the heat range. That would be the equivilent of Denso IK20 plugs with regard to heat range. Each letter and number means something. I posted a guide once upon a time.

 

[Velocifero]

IK22s are the same heat range as the zfr7f NGK copper plugs. Both are one heat range cooler than the stock MSP heat range. The stock MSP plugs are PZFR6F plugs I believe. The "6" is the heat range. That would be the equivilent of Denso IK20 plugs with regard to heat range. Each letter and number means something. I posted a guide once upon a time.

Thank-you for the info.

 

[genius]

plugs

Hey just to piggy back, I know that we have severely thread jacked...

I tried one-step colder plugs running 9.5 lbs, and after a few weeks, the car started hesitating really bad. When I popped the plugs out there were sooty as hell.

Turned out that there was not enough heat on the plug to burn off the deposits. I could have increased to boost in order to raise the heat, but that seemed silly, so I went back to stock range. Just my 2 cents.

 

[genius]

Spring tension

I read down through the 8 pages, but I didn't see the answer pop out...

The part number you gave was for a 2lb spring tension? If so, how would I go about finding a 2.5 lb tension or a 3 to increase the boost further?

How did you decide on this particualr spring, considering that it would have to be a certain length, ect? My goal is 9.5 without the MBC.

 

[Velocifero]

I read down through the 8 pages, but I didn't see the answer pop out...

The part number you gave was for a 2lb spring tension? If so, how would I go about finding a 2.5 lb tension or a 3 to increase the boost further?

How did you decide on this particualr spring, considering that it would have to be a certain length, ect? My goal is 9.5 without the MBC.

you only needed to read page one

... and a carburator spring (part #24-5582-8 at canadian tire / Prt # 59002 from Autozone- You need to curve both ends to make hooks so you can install it properly). You use the biggest one in the pack. Mechanics gloves ...

I used the part number SpeedBeaver used in the first post. It was the longest one with the most tensile strength, and you can cut the length of the spring a little to make it more tensile (up boost more)

 

[hoindawall]

just installed the spring and i got a 1.5psi increase. it spikes to about 9.5 then settles at 8.5. it pulls alot harder now. also the car doesnt buckle after shifting. just wondering if anyone else who did this was your spring a little twisted? mines had to go around that bar so it looks a bit twisted.

 

[FlyinMSP]

Hahaha! I'm better than you, I run 5.8 and falling off to 5. But I do have an ebc which sometimes I turn on to run 8 psi on low boost. But for the most part I run stock. J/k about the better than you part. These cars are so inconsistent it's not even funny. You can say that you run stock boost and you could be anywhere from 4.5 - 7.5 psi!

But I may still try this mod even with my ebc.

I have noticed that many Canadian MSP seem to boost around 5-5.5 psi stock, like mine... It wouldn't surprise me if Mazda purposely lowered the boost on MSP sold in Canada (and assembled in Vancouver) because of our winters... I mean, I've already hit fuel cut in winter when I was still completly stock!

I think the "inconsistency" is mostly due to the very nature of turbocharging and since we do not have an electronically controlled boost control, the numbers vary a lot depending on weather condition. MSP's boost control is crude at best! Nevertheless, this system allows us to easily play with boost pressure

 

[Velocifero]

just installed the spring and i got a 1.5psi increase. it spikes to about 9.5 then settles at 8.5. it pulls alot harder now. also the car doesnt buckle after shifting. just wondering if anyone else who did this was your spring a little twisted? mines had to go around that bar so it looks a bit twisted.

I had the chiooce of going around the bar or passing it up so that the loops were on the same side of the bar. no twisting on mine.

 

[Stormtrooper77]

Will this still work with my boost controller? I mean I want to install the spring and it increases my boost to run say 8 psi, would my current low setting on the boost controller then increase the boost based on the current 8 psi with the spring(ie. raising it to 9+) or will it keep the current level (8 psi)?

 

[SpeedBeaver]

Will this still work with my boost controller? I mean I want to install the spring and it increases my boost to run say 8 psi, would my current low setting on the boost controller then increase the boost based on the current 8 psi with the spring(ie. raising it to 9+) or will it keep the current level (8 psi)?

The two wil add up I think. For safety purposes I recommend not using both together.

 

[genius]

The two wil add up I think. For safety purposes I recommend not using both together.

Ditto... that just sounds crazy.