Has any one tried this

[Agnem]

Sorry guys, I never saw the kit. It was in an old post somewhere.

 

[93turbo_animal]

So why is it tough for our engines to spool a bigger turbo? Not enough N/A horsepower?

Its tough for any motor to spool a turbo to big for the application. You need volume of air to get it to spool and the volume is dependent on the cubic inches RPM's and the fuel. Now the only thing you can really affect is the fuel but if you try and add enough fuel to get the turbo spooling your gonna blot out the sun

 

[Hyde]

Well our turbos are about the size of a DSM, I know we have half the rpm range but damn those things are tiny. What makes it easier for a Powerstroke to spin the bigger turbo?

 

[93turbo_animal]

Well our turbos are about the size of a DSM, I know we have half the rpm range but damn those things are tiny. What makes it easier for a Powerstroke to spin the bigger turbo?

Nothing an OBS PSD has plenty of lag thats why you see a lot of guys that like fast trucks have changed housings on their turbo to help it spool faster and a chip will help it a little but thats cause your adding fuel.

 

[FordGuy100]

Nothing an OBS PSD has plenty of lag thats why you see a lot of guys that like fast trucks have changed housings on their turbo to help it spool faster and a chip will help it a little but thats cause your adding fuel.

Yup, I've driven an OBS psd, with an upgraded down pipe and a mild economy chip and it had lots of lag. It was like sitting still, stepping on it, it took a good 3+ seconds until the turbo got spooled up. But when it did.....

 

[93turbo_animal]

yeah I'd rather have almost full boost at 2000 RPM then 3000RPM cause who wants to drive at redline. I'd rather sit back and cruise up a hill then have to down shift to get the rpms up to make it up the same hill I just cruised up in my IDI with out downshifting

 

[Hyde]

Well that makes a lot more sense, I havent driven an OBS truck. That clears things up.

 

[hesutton]

Didn't somebody on TDS put a SD 7.3 turbo on his IDI along with an IC? Might have been the same guy who put a Spicer gear splitter in there too.

Yeah, the guys handle over there is "woodie". I cannot find his photos because the TDS site photo link is dead right now (at least for me). But he said he runs about 12 psi with the '99 PSD turbo's wastegate disabled. He sees about 6-7 psi with the wastegate hooked up.

He did all the fab work himself. I've never seen the kit, but I also remember seeing a link to a guy "working" on one a few years back.

Heath

 

[Dieselmaster]

The TDS photo area is dead for everyone... look in the news and comments area and you can see where they locked my post for just asking about...

You won't see the post where one of the former moderators commented on how slow it was taking for them to fix things.... They erased it within 10 minutes of him posting it.

 

[One_fast_IDI]

well the reason i ask besides getting the smoke to clear up is i was thinking it would get rid of the lag

Scott

 

[FordGuy100]

well the reason i ask besides getting the smoke to clear up is i was thinking it would get rid of the lag

Scott

Nope, you would get more lag. Plus you have a wastegated turbo, use the wastegate on that thing, you will get boost quick. Unplugging the wastegate on a wastegated turbo basically makes it a nonwastegated turbo, which have more lag. Sure you wont see as much boost with the wastegate working as compared to the wastegate being plugged, but with the boost you will be putting out with the plugged wastegate its way out of its efficiency range, and will probably shorten the life of your turbo, and all your doing is super heating the air which means you are NOT gaining any more power out of it. If you want more boost swap out the housings.

 

[Dirtleg]

Unplugging the wastegate on a wastegated turbo basically makes it a nonwastegated turbo, which have more lag. QUOTE]

That is not really how that works although in theory it sounds good. Typically your nonwastegated turbos have larger turbine housings and turbines. It takes more heat (exhaust) to fill and spin the turbine in this case. The positive effect is less backpressure at higher exhaust flow rates. Also the larger turbine has a mechanical advantage to spin a larger or more aggressive compressor wheel. The down side is turbo lag as it just takes more energy to get it up to speed.

The wastegated turbine doesn't need to be as large because once the wastegate opens there is another path for the gases to take around the turbine. It is also there as a safety measure to keep from overboosting. The good thing is that prior to the wastegate opening all the exhaust gases flow through the smaller turbine hece the quicker spool up. The downside is less mechanical advantage (torque) so you're better off using a less aggressive or smaller compressor wheel limiting your maximum flow rates in comparison.

Remember that it's not so much the flow of gases (intake air and exhaust)through the engine as the expansion of the exhaust gas once it exits the cylinder that allows the turbo to make boost. Without the expansion of the exhaust gas the turbo would not spin fast enough for the compressor to overcome the amount of air being drawn in by the engine. Basically air in = air out until you add the heat of the exhaust. That is where your extra energy is coming from.

Hope this helps clear things up a little. I tried to keep it simple as there is more to it for sure.

 

[towcat]

My company commuter is a '97 f450. It's flat dead below 2500rpm. VW busses can outrun me at a stoplight. Above 2500 the power comes on but it's not impressive. from 3k to 3500 it finally got something. Conclusion....I drive the damn thing like a Detroit. foot to the floor and revving it off the governor.

 

[MUDKICKR]

someone said that the turbo kits have a turbo that is the same size as a dsm turbo? is that true? i have 2 turbos off of 2.0l eclipses and was thinking of a twin turbo system (one turbo off one manifold). so if thats true that work?
i guess my question is will it work and how much lag would i have? when would the turbos start building boost?
not trying to take over the post just wondering

 

[Dieselguy123]

I think those turbos would be a little to big in a twin setup, and a little to small in a single.