Getting MORE POWER from your Jeep's 2.5 VM Diesel Engine

2 years ago
163

I've had a number of messages about the mods i've made to the Jeep Cherokee XJ and its 2.5 VM Motori 425 OHV Diesel Engine to get more power from the engine. First off I am no expert at all but I the pursuit of turd polishing and getting more out of something from its original state.
The 2.5 VM has a terrible reputation amongst some and its loved by others. Its cylinder heads were a nice idea but in practice a one piece head would have been better, but better heads are on the market and the engine can be reliable and perform very well with modifications.
I decided to keep my VM and not swap it out to see what I could do to make it more of the engine I wanted it to be.
In this video I discuss the avenues you can take to get more power from your VM without compromising the mechanical functionality of the engine.

Thanks for following this build and watching and please find the build components below -

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Full VM Build Playlist - https://www.youtube.com/watch?v=5Mzlc9XHJ6k&list=PLQQXgt9BFgARUPF53xgncZF2nlcCqJmwV

Build Components -

Turbo Materials:
GT2052 (727264-5001S) - https://www.speeding.nu/p/turbo-tillbehor/turbo/garrett/garrett-gt-serie/garrett-gt2052.html?gclid=CjwKCAiAgvKQBhBbEiwAaPQw3LmiSWL4XqMzOMnyedYl1_jMYD5nTGCRiF70Xz8tmjxD7KQz7wCNlxoC-c0QAvD_BwE
Oil Feed - M10x1.0 to 1/8 npt -https://www.streetperformance.se/product/nippel-1-8npt-till-m10x1-hane-hane?gclid=CjwKCAiApfeQBhAUEiwA7K_UH3ZDJGXTOWNhUjLVbwd4SMmW80ceQWen4RRqE4FCITe1vKmQxgNQgBoC4QAQAvD_BwE
T25 Gaskets (x2) - https://www.speeding.nu/p/turbo-tillbehor/adapter-flansar-packningar/turbin-inlopp/t25-packning.html
T25 Turbo Heat Cover - https://www.speeding.nu/p/turbo-tillbehor/turbomossa/hurricane-turbomossa-t25-kolfiber.html
Universal Oil Feed Line - https://www.ebay.co.uk/itm/273474848723?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2060353.m2749.l2649

Intercooler Materials:
Universal 2" Intercooler Pipe Kit - https://www.ebay.co.uk/itm/153577150247?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2060353.m2749.l2649
Universal One Sided Intercooler - https://www.ebay.co.uk/itm/255182825365?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2060353.m2749.l2649

Gauges:
EGT Gauge - https://www.ebay.co.uk/itm/313370513296?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2060353.m2749.l2649
Boost Gauge - https://www.speeding.nu/p/branslesystem-an-kopplingar/branslesystem-108/bransletrycksregulator/tillbehor-bransletrycksregulator/bransletrycksmatare-0-7-bar-svart.html?gclid=CjwKCAiApfeQBhAUEiwA7K_UH6keNnt7BASJxKbbqDkj-ncbZBhCAeDfw9aQozd6843CAPTbk7CNhhoC7GYQAvD_BwE
You will have to source a 1/8npt to 1/8npt Boost line -

Manifold Extension Build Materials:
Manifold Extension Pipe 90 degree (x4) - https://www.j-spec.se/motor/avgassystem/grenror/grenrorsdelar/42x3mm-90-grader-kortradieboj-rostfri-304?group=prod_prod_grp-s1%2F487
Manifold Extension Pipe Straight x1 - https://www.j-spec.se/motor/avgassystem/grenror/grenrorsdelar/42x3mm-rak-langd-300mm-rostfri-304?group=prod_prod_grp-s1%2F487
T25 Stainless Flange (x2) - https://www.speeding.nu/p/turbo-tillbehor/adapter-flansar-packningar/turbin-inlopp/t25-turboflans-rostfritt.html
Exhaust Wrap - https://www.j-spec.se/motor/varmeskydd/avgassystem/avgasbandage/avgasbandage-titanium

Intake Materials:
2" to 3" intake adapter - https://www.j-spec.se/motor/silikonslang-ror/silikonslangar/silikonslang-reducerande/silikonslang-bla-rak-koppling-76-51mm-3-2
3" aluminium 90 degree bend - https://www.j-spec.se/motor/silikonslang-ror/aluminiumror/aluminiumror/aluminiumror-90-grader-76mm-3.00
3" Silicone Coupling for Air Box - https://www.j-spec.se/motor/silikonslang-ror/silikonslangar/silikonslang/silikonslang-bla-rak-koppling-76mm-3
Universal; Air Intake CLOSED - https://www.ebay.co.uk/itm/193754722078?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2060353.m1438.l2649
You will need to find a suitable air intake system as there are many types.

Stainless Exhaust Materials:
2.5" Flexi - https://www.j-spec.se/motor/avgassystem/avgassystem/flexror/flexror-med-anslutning-2.5-63mm
2.5" 90 degree x1 - https://www.j-spec.se/motor/avgassystem/avgassystem/rordelar/rostfritt-ror-90-grader-2.5-63.5mm
2.5" Straight - x2 https://www.j-spec.se/motor/avgassystem/avgassystem/rordelar/rostfritt-ror-rak-100cm-2.5-63.5mm
2.5" 45 degrees x1 - https://www.j-spec.se/motor/avgassystem/avgassystem/rordelar/rostfritt-ror-45-grader-2.5-63.5mm
Some materials will require sourcing at the time of construction but this is the basis of the downpipe and the first parts of the exhaust up to the silencer.

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