Been busy again... New "Ram Air" intake and charge pipe!!!

oregon101 · #1 10-19-2009, 09:04 PM

That looks great! Excellent job. Looking forward to your track info.

IceV_760 · #2 10-20-2009, 02:13 AM

I just can adore the speed you build up your Volvo.
Again, we saw something new.
Is N/A manifolds rare in USA? As i know you guys
wrecked every single 200-series diesel, which were just d24's.

Jason · #3 10-20-2009, 04:12 AM

They are pretty rare around where I live, that is diesel volvos in general. They seam to gravitate towards the coasts and I'm in the middle of the US.

I had some free time on my day off and started getting ideas, and thought why not!

Jason

v8volvo · #4 10-22-2009, 12:08 AM

Looks great. How did you plug up the hole in the bottom of the manifold where the tube from the turbo used to slide in? You may eventually find that this is the best setup of all, since the D24 NA manifold may have trouble fitting under the 700 hood, and it has that big opening on the back that I would worry about when running big boost.

Now it just needs an intercooler... and injectors... and a manual trans... and a real oil cooler. Then you will have a pretty serious diesel hot rod on your hands.

IceV_760 · #5 10-22-2009, 01:14 AM

Quote:

Originally Posted by v8volvo

and it has that big opening on the back that I would worry about when running big boost.

Now it just needs an intercooler... and injectors... and a manual trans... and a real oil cooler. Then you will have a pretty serious diesel hot rod on your hands.

You can just tig-weld that big opening on back with thick aluminium plate.
So its not going to be problem. No injector changing needed by the way,
or can you point me some thread which recommends it?
Sorry little sceptism, but im curious to know if you really change injectors?

I get the idea, with bigger nozzles you can feed more fuel to cylinder in less time
than with smaller, but i havent heard anyone in finland had changed injectors,
just liquid head.

Jason · #6 10-22-2009, 05:17 AM

I too have been researching the injector thing. IDI injectors aren't sized differently, it all depends on how much fuel is pushed though it since they pop open. Its not like a TDI injector with a certain size orfice that is enlarged for more power. I have come to find out the different numbered nozzles eg 253 293 only refer to different updates and changes that were made as they revised the design of the injector tips. Whether is was for cleaner combustion, less noise, etc... As the years went on the numbers increased as bosch release new and better tips.

As for the intercooler, I've got that covered with the water/alcohol injection. It is just as effective if not more so since I can tune the injection amount.

Whats really going to step up the performance will be the ARP head studs. This car with 25lbs boost and fuel to match is going to be really mean.

I'm working on the manual. At least I finnaly got a D24T bellhousing and flywheel. I'm wanting to do a T5 swap but my buddy that just bought his 760 may want to sell and its a m46. We may swap and sell his car as an auto. That would be straightforward and when I blow it up I can go to a T5 then.

Whats wrong with the oil cooler? I know its not that big but for how I drive it, I would think its alright. If I was rallycrossing it and under load for a long time I could see doing a larger one, but most of my running is messing with guys on the street or just getting into it for a quick hard run. Hell it holds 8 qts of oil!

Jason

Jason · #7 10-22-2009, 05:19 AM

The inlet was plugged with a rubber expandable pipe plug from home depot. I used a nylock nut instead of the big dorky wing nut, and siliconed it in.

Jason

v8volvo · #8 10-24-2009, 01:10 PM

Quote:

Originally Posted by Jason

I too have been researching the injector thing. IDI injectors aren't sized differently, it all depends on how much fuel is pushed though it since they pop open. Its not like a TDI injector with a certain size orfice that is enlarged for more power. I have come to find out the different numbered nozzles eg 253 293 only refer to different updates and changes that were made as they revised the design of the injector tips. Whether is was for cleaner combustion, less noise, etc... As the years went on the numbers increased as bosch release new and better tips.

As for the intercooler, I've got that covered with the water/alcohol injection. It is just as effective if not more so since I can tune the injection amount.

Whats really going to step up the performance will be the ARP head studs. This car with 25lbs boost and fuel to match is going to be really mean.

I'm working on the manual. At least I finnaly got a D24T bellhousing and flywheel. I'm wanting to do a T5 swap but my buddy that just bought his 760 may want to sell and its a m46. We may swap and sell his car as an auto. That would be straightforward and when I blow it up I can go to a T5 then.

Whats wrong with the oil cooler? I know its not that big but for how I drive it, I would think its alright. If I was rallycrossing it and under load for a long time I could see doing a larger one, but most of my running is messing with guys on the street or just getting into it for a quick hard run. Hell it holds 8 qts of oil!

Jason

Jason, interesting stuff about the injectors. If what you say is true, then what is the difference between the normal TD and the "GTD" injector nozzles? I think there must be some possibility of flowing more fuel with the GTD units, since they (along with an intercooler) are the major differences between TD and GTD engines, the latter of which do make significantly more power. I buy what you are saying about many of the number series referring to refinements in nozzle design rather than to fuel flow capability, but I think there is a possibility a larger nozzle could nonetheless exist.

Did you get the M46 D24T bellhousing/flywheel from the guy in Pennsylvania? You may discover that you end up deciding to just stick with the M46 and forget the T5. I have owned both, and the M46 is much nicer to use -- excellent gearing, very smooth-shifting and quiet, and the electronic overdrive is a nice feature. If you run short rearend gearing and use the stronger P-Type OD unit, I doubt it will really ever give you too much in the way of trouble. Remember that the M46 is used behind turbo gas motors that came stock with as much as 200 hp and 190 lb-ft, and they stand up to modified motors making up to about 250 lb-ft. I'll be surprised if you are able to break one with a D24T no matter how much you modify it.

I just hate the oil cooler design, with the hose running up over the valve cover that is hard to bleed and always gets soaked with oil and gets in the way when you are adjusting the valves, and the oil soaked short hose at the back of the head, and the increased stress on the cooling system and the possibility of coolant and oil mixing. Much better to switch to a real external cooler that will keep temps lower and not be as much of a threat to the engine.

You ought to install the MLS headgasket when you do the head studs. Then it will really be unbreakable.