Diesel Place banner

Status
Not open for further replies.
1 - 5 of 5 Posts

·
Registered
Joined
·
1,457 Posts
Discussion Starter #1
Iv got friends that "say" they are hittin 45 & 50lbs of boost on their stock holset turbo, dodge of course, and dont most people say 35 is about max for the dmax, even had one guy claim to hit 60 psi on his 600series cummins with stock charger. Im sure these turbos coulda blew at any time but why is the blowing point so low for the IHI.
 

·
Registered
Joined
·
10,516 Posts
Iv got friends that "say" they are hittin 45 & 50lbs of boost on their stock holset turbo, dodge of course, and dont most people say 35 is about max for the dmax, even had one guy claim to hit 60 psi on his 600series cummins with stock charger. Im sure these turbos coulda blew at any time but why is the blowing point so low for the IHI.
PSI is not the be all and end all.

What CFM at what PSI?

How hot does their air charge become when running an HX35 off the map?

Our turbo is designed/biased for high volume, not high pressure.

An HX35 stock is losing efficiency past 35 PSIG Drive press etc
An HX40 stock is losing efficiency past 40 PSIG Drive press etc

Take both of those turbos at an equal boost reading (30 PSIG)and the 40 has 150F less egt's (Avg) because of a cooler initial charge (more density) and more flow.

These turbos on a DMX would not produce enough boost/volume to feed a DMX. The Hx35 would surge wildly, and out IHI is very close in spec to an Hx40 in terms of everall efficiency.

Remember we have 44 more cubic inches to feed. The HX40 would only produce 38 psig before it went into an overspeed condition on our engine.

FWIW
 

·
Registered
Joined
·
264 Posts
Excellent post Juice!! Bigger boost is not always better boost. You can lose power/not make as much power running a charger past its limits.
 

·
Registered
Joined
·
1,457 Posts
Discussion Starter #4
So basically b/c of the slightly smaller displacement of the I6 there is more pressure cauzing boost #'s to be higher but not actually be making more or even as much power as our turbo at 35psi, what kinda #'s are the fords seein with the garret, might be a better comparison since were both V-8's
 

·
Registered
Joined
·
10,516 Posts
So basically b/c of the slightly smaller displacement of the I6 there is more pressure cauzing boost #'s to be higher but not actually be making more or even as much power as our turbo at 35psi, what kinda #'s are the fords seein with the garret, might be a better comparison since were both V-8's
Less swept area= less displacement or capacity.

It helps to use the analogy of an air compressor (turbo) and the storage tank (engine)

The larger the compressor, the more volume it has to fill the tank, and faster as well.
 
1 - 5 of 5 Posts
Status
Not open for further replies.
Top