I did a search and saw that some are getting 23+ psi. I have a 98 24V, stock and top out at 17.5-18 psi. Is this normal for stock? Are there any tricks to get more boost without a chip and w/out putting too much stress on the system?

Tanks alot.

Steve.

 

probly have 275 inj. in there..thats the case with mine

 

Need to enter your truck info in signature (user cp at top,than Profile).
Auto vs Manual have two different ways to fool boost!

Think you should get at least 20 psi as stock. MY 02 got 22. Check & tighten all connections on cool air system - turbo output, rubber boots, intercooler, & air horn at engine air intake.

Boost fooler & smallish injectors (275's or EDM 1's or 1.5's) will give you a lot without hurting your stock tranny - as long as you don't overdo it. No other way ro add boost without adding fuel to spin your turbo faster.

RJ.

 

My 98 was right around 18 -19 most of the time stock. I think the stock wastegate is set to start opening at 17-18 PSI,

 

Wastegate is set at ~20 psi max. Anything much higher will set a code without a boost fooler. Many ways to get more boost then by defeating or adjusting the signal to the wastegate.

 

What are they?! Anything free or cheap?

 

The cheapest boost fooler I have seen runs about $65, but I don't remember where I saw it. You could do a search however. As for increasing boost after that you will most likely need a turnbuckle, all of $3 maybe at your local hardware store.
Mishkaya

 

Thanks RJ, I updated my profile
It's a 5 spd

So what's the deal with the turnbuckle??

Steve.

 

No need for a turnbuckle with a manual. There is an orfice elbow that screws into the housing on the sensing line going to the wastegate. I don't think just increasing the boost is going to do anything for you performance wise.

 

The turnbuckle is used on 2001 automatic trucks (not sure if any other year) to hold the wastegate shut to increase boost. The reason that it is used on the automatics is because they have a hard line leading to the wastegate actuator as opposed to the manual transmission trucks which have a soft line. Manual transmissions (soft line) generally use a boost elbow which restricts flow to the wastegate, causing it not to open, therefore higher boost. The turnbuckle and boost elbow are two different ways to accomplish the same thing, which is to keep the wastegate from opening, increasing boost.

 

So restricting that boost elbow will result in higher boost? How much more restriction? plug it?


Does the ECM adjust boost based on fuel usage. ie, bigger injectors=more boost? So more boost w/out more fuel won't do me any good?

Thanks for answering my noobie questions.

Steve.

 

ECM has nothing to do with it creating more boost. per se.
More fuel = more exhaust = faster spinning turbine wheel = more conpressed air to engine = higher boost reading.
Boost elbow prevents wastegate from "dumping" exhaust; thus max boost. BUT, must have a boost fooler to fool ECM into thinking boost is normal - so it doesn't throw codes and defuel.

RJ

 

Ok, I understand that. However, will more boost get me more power or not. I'm can't do injectors right now and if more boost won't do anything except make my gauge go up further, then it's not necessary. If it will help, where do I get a boost fooler?

 

More boost will drop EGT's and get you set up to burn more fuel. To oversimplify, more BHP in a diesel requires more fuel. More air is needed to burn the additional fuel efficiently.

My truck did 21 PSIG stock, 30 PSIG with the stock injectors, EZ (it has a built-in boost fooler) and boost elbow, and 34 PSIG with the addition of the DD2 injectors. EGT's were 1300 degF, 1100 degF and 1250 degF respectively while towing our 13,500 lb 5th wheel.

Rusty

 

As Rusty just showed, the answer to your question is No!

In a diesel, more fuel = more HP..period. Correction, more burned fuel = more HP.
Your original question asked nothing about more power?
Save your money for injectors. They will give you more power AND increase your boost

RJ