Only getting max 20-21 boost

[Sky]

I do not have my hy35 modified, so is this the max boost Ill see until its modified with the Turnbuckle etc... ?? Or should I be getting more with my mods?

 

[EMDDIESEL]

That is the most you will see with an unmodified wastegate and just an EZ. Untill you Do modify the wastegate, it will continue to open at about 20psi. The EZ instructions say disabling the wastegate will not offer any performance improvement. I confirmed this today with Ted Jannetty. There is NO advantage to disabling it untill you start getting much larger Injectors and a higher power box. Basically, 20psi will feed up to 350HP. If anything, it will raise temps with no gains.

Give Jannetty a call: 203-753-RACE

 

[KatDiesel]

Yes Sky until you modify the wastegate you will only see 20lbs of boost.



Higher boost will result in lower EGT's... . upto a certain point. The HY35 does just fine around 27psi to 28psi of boost. Its not "needed" but in Sky's case I would do it to lower the EGT's. But yes what Ted is saying is true, you don't need as much boost as everyone is pushing. No there is no performance gain, but there is lower EGT (due to more air)(of course to a certain point) so therefore you add more fuel "longer". The trick is finding that "certain" poit and staying below it.



Sky get a spring and use it to "slow" down the wastegate not to disable it. With a $5 spring I was getting 29 to 30psi with my "Hot" PE. Without the extra boost my EGT's would get too high to really play with the extra fuel for very long, this is with the HY35 and a JRE 4" exhaust.



This was my experience on my truck.

 

[EMDDIESEL]

Where do you get one of those spring kits?, and will it work with a hardlined wastegate?

 

[KatDiesel]

Well StakeMan (TDR Name) picked up the spring for me while I was in CO last January. I recently talked to him and he said he found a better one to use, let me ask him where and what he is using now. Yes it will work for the HY35 thats why I mentioned it, its what I have and what Charles has.



Basically you put a spring on there, then use some wire, twist the wire until you see fit and your set. The wastegate is not disabled but it is slowed down. And the best part... need warrenty work? One snip on the wire and its off. Extremely simple.



I gotta work tonight, but I'll email Charles and see what he has to say about the new spring. I believe the one he got me came from PepBoys.



I'll post as soon as I hear back from him. (maybe not till 8am tommorrow morning).

 

[KatDiesel]

Here is some info from an old post or two of his.



3 1/2 x 3/4 spring. It is used for holding the shoes in drum style brakes. Bend one end into a V shaped hook. Hook this end onto the arm that comes out of the turbo. Use a piece of wire and go around the turbo where the wastegate head attaches. Make sure you don't go over any lines or hoses. hook the other end of the spring to the wire. Twist the wire to apply more tension to the wastegate. You have need to use a some kind of a pry-bar on the spring so you can get enough tension on it. I have been running this setup for a while now and its working good. I get 26psi with the EZ and no muffler. The combination drop my egt down a lot.



I used a drum shoe keeper spring I found at the local Pep Boys. I think the size was 3/4 x 3 1/4. It is a really strong spring. Both ends of the spring are bent into loop like hooks. On one end I bent the loop backwards into a V shape. I hook that end onto the lever that comes out of the turbo that connects to the wastegate arm. I then ran a heavy piece of wire between turbo and the wastegate head. Where the head bolts onto the turbo. Hook the spring to that wire and pull and twist the wire to put tension on the spring. The spring cost me about $2.



Not sure if he ever got any pictures of it or not. ANd like i said he mentioned he found a better spring to use then the one above. Hopefully he will comment here tonight while I am at work. I left him a Private Message showing him this thread.....

 

[jgil104]

is this mod applicaple to the hx35 turbo ? or to the hy35 only if so is there a similar mod for the hx35? t/u

Originally posted by KatDiesel

Here is some info from an old post or two of his.



3 1/2 x 3/4 spring. It is used for holding the shoes in drum style brakes. Bend one end into a V shaped hook. Hook this end onto the arm that comes out of the turbo. Use a piece of wire and go around the turbo where the wastegate head attaches. Make sure you don't go over any lines or hoses. hook the other end of the spring to the wire. Twist the wire to apply more tension to the wastegate. You have need to use a some kind of a pry-bar on the spring so you can get enough tension on it. I have been running this setup for a while now and its working good. I get 26psi with the EZ and no muffler. The combination drop my egt down a lot.



I used a drum shoe keeper spring I found at the local Pep Boys. I think the size was 3/4 x 3 1/4. It is a really strong spring. Both ends of the spring are bent into loop like hooks. On one end I bent the loop backwards into a V shape. I hook that end onto the lever that comes out of the turbo that connects to the wastegate arm. I then ran a heavy piece of wire between turbo and the wastegate head. Where the head bolts onto the turbo. Hook the spring to that wire and pull and twist the wire to put tension on the spring. The spring cost me about $2.



Not sure if he ever got any pictures of it or not. ANd like i said he mentioned he found a better spring to use then the one above. Hopefully he will comment here tonight while I am at work. I left him a Private Message showing him this thread.....

 

[KatDiesel]

Originally posted by jgil104

is this mod applicaple to the hx35 turbo ? or to the hy35 only if so is there a similar mod for the hx35? t/u

Well it was thought up for specifically the HY35 turbo. On the HX35 its most common to change the "lil brass" elbow on the front of the turbo. I don't see what it wouldn't work on an HX35 but I haven't personally "seen" it done yet.



Keep in mind when you physically modify the wastegate in someway, you need a "boost module" to keep from setting codes and defueling.

 

[StakeMan]

The new springs that I found were at Home Depot. The brand name was "Handy Man", I think. Look for the shortest, and strongest spring they have. It will have to "C" like hooks bent out of the ends of the spring. Bend one of those ends backwards and into a hook. It will not be very easy to bend! Take the newly bent hook and hook it on the lever arm of the wastegate that comes out of the exhaust side of the turbo. Take a piece of solid wire ( I used cow tie wire, if you know what that is) and run it behind and around the wastegate head. Make sure you are not going around any hoses. You will be putting a lot of tension on the wire. Thread the wire through the free end of the spring and back to the other end of the wire. Use some pliers twist the wire until it is snug. Find a long pry bar that will go into the hook on the spring. Pull the spring and twist the wire to hold it. It will take a lot of tension to gain more boost. Work up to the desired boost level. Try not to do it to many times or the wire will brake. I double up the wire the last time I did it! I did have some pics of the bends I made, but can't seem to find them. I will try to take some tommorow. I have had this setup for at least 10,000 mi and have not had a problem. I hit 28 psi boost with just an EZ. I would not go over 32 with the hy35 turbo. BTW the springs were 2 of $2. I hope this helps.

 

[StakeMan]

Yes, I think you can use the same trick on any turbo where you can get the spring hooked to the wastegate lever and find a place that you can put the wire around thats strong enough to hold the tension. Trust me, there is a lot of tension. I use a 2' long 3/8 rebar to put the tension to the spring. KatDiesel can verify that. He got pale when I was walking towards his truck with it!

 

[Stefan Kondolay]

Need boost to make big power

EMDDiesel



You need more than 20PSI of boost to sustain 350hp without having temperature problems.



I went to the track to prove this point with Piers. We took my truck which makes more than 350hp closer to 400hp so to make it fair we ran my truck at 32psi of boost which is more than enough to compensate for the 50hp. I normally run between 44-48psi of boost. With my normal boost my temperature reach 1500 at 1000ft. and with the reduced boost my temps hit 1500 at 300ft. I also had reduced power and it was shown by my 1/4 mile time: with full boost-14. 08@94mph---with 32psi-14. 65@90mph.

No other changes other than wastegate, and the passes were done within 1 hour of each other. The air was actually better on my run with the reduced boost.



I'm talking about rear wheel horsepower, so it's a completely different ball of wax if your talking about flywheel horsepower.