rebal

i wouldnt mess with it I see 38 psi boost with mach 1.6s and that is high for a hx35w put the 1.6s in and see what boost you have to high of boost and all you get it hot air

Topper

Does it hurt to run it without the elbow?

Topper

Anybody?
Thanks for all the help guys!
Topper

Clunk

Sorry, I haven't run mine with the module AND without the elbow.

Copenhagenjunkie

I don't have the elbow, it's plugged and that's the only way I've had it ever since the wastegate actuator went bad about 3 yrs ago. After I got the ez last yr and boost gauge I adjusted the turbo master to raise the boost. I might adjust is some more after the DD2's go in since I will have more fuel.

TORQUE

Leave the boost elbow on, I think you are probably pretty close to the boost you need to be at, with the amount of fuel you have now, especially if you say you don't have much/any smoke now. I would still check for loose intercooler boots though, they like to come off the more boost you have.

Topper

Thanks guys for all the great input! This a great site!
Topper

Topper

Hey Guys,
I just wanted to post an update. I've been running the truck for about a week without the elbow and things are good so far. With the boost elbow I could make 25 psi of boost and I could hit 1250 on the pyro. (up a big hill) Ok so now I have the waste gate plugged off and now I see 30-32 psi. On the same hills that I could make 1250 before I now see 1100 max .I could hit 1250 with the truck unloaded and now I can only hit 1100 with about 2000 lbs in the truck. So there ya have it. I don't see any need to put the boost elbow back in. I guess I'll order up the Mach 4's and see what happens. Thanks for the your input guys! Let me know if ya think I'm missing anything.
Topper

Ph4tty

Sounds like you're running a good setup now- pushing the turbo to the end of its efficiency range with good EGT's. If you're adding more fuel you're going to overspeed the turbo and things will get hot faster. Maybe a manual boost controller would help. http://www.boostcontroller.com/index.php?category=35

signature600

When you put those 4's in...you'll need to put that boost elbow back on You WILL need that wastegate with Mach 4's Try to keep bost below or around 38psi max!

35's are tough and cheap, but not free I know...HX-35's - 0, Chris - 3
Chris

HOHN

I should clarify my comments. High boost indicates that the turbo flows a lot better than the engine does.

In an ideal world, the engine would breathe so efficiently that it would swallow all the air that the turbo can provide. Obviously this won't happen, because you have a fixed displacement and finite valve sizes and flow conduit efficiencies.

But my other statements are correct. I never said that 22-25psi was INefficient.

I was simply taking issue with the generalization that more boost is always good.


Heck, I can block the WG and take a bone stock 24V up to 26-28psi. Will it make any more power? No. Will it run better? No. Will it have better mpg? No.

So what you need is ENOUGH boost. No more, no less. You need enough to keep EGT down. But if you're running a max EGT of 600°, then you have too much boost, and the pumping losses will be horrid.

Never mind the obvious case of the turbo being off its map from excessive boost.

Another example would be the fact that the stock turbo can only support ~350hp with the anemic stock cam. Install a larger cam that lets the engine breathe better, and PRESTO!-- the SAME turbo will support 400+hp, with LOWER EGT and LOWER boost!

Why? Because high boost indicates high restriction!

It's impossible to build ANY boost if there is no restriction to airflow.





Sorry that I wasn't clearer. I wasn't intending to address this specific case, just the mistaken assertion that more boost is always better.

JH

HOHN

You have a little too much boost if you are only seeing 1100.

I'd put the boost elbow back in-- you'll NEED it with 4s, or you will risk grenading that little '35. With a blocked wg, 4s will push the turbo to 38-40psi-- well into the danger zone, and no longer efficient.

The above link to boost controllers is what you need.

micah

the link above has nice elbows, but $$... I got mine on ebay for <20 shipped. its simple and it works. just a little brass elbow with an allen set screw.

SmokinDzl

I had low boost only pulling about 22 lbs. max picked up this http://cgi.ebay.com/ebaymotors/ws/eB...tem=8030961484 and it works great, after 3 adjustments she jumps right up to 34 WOT and lost a lot of the smoke not a hugh hp difference overall but a little more set you back in the seat feeling and it seems to accelerate a little better, In normal driving I run about 28 to 32 range.

Topper

Thanks guys! I'll pick up an adjustable elbow and let ya know how it works out.
Thanks again!
Topper