Reduce Boost (Pulley) without Re-tuning?

Corbic said:

Car is currently running 21psi on a KB2.2 Gen 1. Looking to get out of the ragged edge right now, can I drop it down to 19psi (or whatever is recommended) without the car running hella rich? Would I need to have the car re-tuned?

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who tuned your car?

Curious because my car came from the midwest as well, and was on 22 lbs on pump gas......and someone thought that was ok....

Zemedici said:

who tuned your car?

Curious because my car came from the midwest as well, and was on 22 lbs on pump gas......and someone thought that was ok....

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who tuned yours? just wondering.

I was told Blankenship

Curt@injected said:

That escalated quickly.



On an ecoboost?

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I'm sorry, its a MAP Performance Auxiliary fuel system! Thanks for catching that! Not a KB BAP!

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silver03svt said:

TWO of your posts have been deleted, and I have sent you a PM, to which no reply is needed....or wanted. Read it carefully and follow the instructions.

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Hello Sir! I'll check my pm box! Corbic betrayed me, I'm sure you read!

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Zemedici said:

who tuned your car?

Curious because my car came from the midwest as well, and was on 22 lbs on pump gas......and someone thought that was ok....

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Fast Lane Motorsports

msp.ecoboost said:

Hello Sir! I'll check my pm box! Corbic betrayed me, I'm sure you read!

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Corbic betrayed me hahahahaha

do you have 60 lb injectors?

Yep, the kit came with 50lbs, and I upgraded to 60lbs! I sold the 50lbs injectors!

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I can’t believe anyone would tell Corbic he would be fine just doing a pulley swap and dropping boost. You guys better read his thread about buying his car and 68 miles later........well......you know..... it broke really good from then on out.

Corbic has a cursed Cobra and really bad luck.


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Zemedici said:

Corbic betrayed me hahahahaha

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I'm glad someone else found that as funny as I did....................

Zemedici said:

Corbic betrayed me hahahahaha

do you have 60 lb injectors?

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Don't the Ecoboost engines use a different style injector? I'm not totally up on them. But a buddy has a Speed 3 with a DI 4 banger and we talked about injectors a bit because he wanted to go E85.

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slo984now said:

Don't the Ecoboost engines use a different style injector? I'm not totally up on them. But a buddy has a Speed 3 with a DI 4 banger and we talked about injectors a bit because he wanted to go E85.

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LB/HR is a really shitty measurement for injectors and it’s shocking that people still use it.


A 60# is around 630-650cc as I recall. On my SR20DET, 750cc did not have room to run E85 with any performance gains.

Corbic said:

LB/HR is a really shitty measurement for injectors and it’s shocking that people still use it.


A 60# is around 630-650cc as I recall. On my SR20DET, 750cc did not have room to run E85 with any performance gains.

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its from the old school days, they weren't 'cc' back then. A lot of old timers dont understand - 'now what in the Sam Hell is a see see?!'

Corbic said:

LB/HR is a really shitty measurement for injectors and it’s shocking that people still use it.


A 60# is around 630-650cc as I recall. On my SR20DET, 750cc did not have room to run E85 with any performance gains.

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Thanks. But not really what I wondering. Since the DI set ups run a higher fuel pressure can they use "standard" injectors? I'm pretty sure they have injectors similar to what's on my diesel. Which would make his comment about using 60lb injectors not too smart.

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Zemedici said:

its from the old school days, they weren't 'cc' back then. A lot of old timers dont understand - 'now what in the Sam Hell is a see see?!'

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Guess it's good I happen to know I have 1100cc injectors waiting to go in.

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@slo984now im pickin up what you're puttin down

So glad this thread is still alive.

We got his man-card pulled last night, at mustangecoboost.net, not the first site to drop him, probably not the last. Just a quick google and I found him either banned or ignored on 5 sites. I'm out, haven't had time to do any upgrades worth discussing, other than the cleaning job on the other site.

hceticra said:

We got his man-card pulled last night, at mustangecoboost.net, not the first site to drop him, probably not the last. Just a quick google and I found him either banned or ignored on 5 sites. I'm out, haven't had time to do any upgrades worth discussing, other than the cleaning job on the other site.

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Where do you moderate at? I've already had messages about him and his actions.