How to squeeze extra 57HP out of 3.8L Pajero! [Dyno Testing]

This video explains my modification journey with the Gen 4 Mitsubishi Pajero 3.8L engine. I have owned this car since 2008 and have documented the performance part upgrade journey and dyno tests throughout the period. After the upgrades the engine is now technically 3.9L. I am also not affiliated with any of the brand mentioned in the video, its all done through trial and error. Below is a list of parts featured in the video:
Phase 1 Parts:
1. DR15SXC-WC Evo Laser Spark Plugs
2. MagnaFlow 59905 2.25in High Flow Catalytic Converter
3. Fox 3 Inch Muffler with cut out
4. Ebay Australian Headers
5. AEM 21-2019BF DryFlow Air Filter
6. AEM 1-4001 Dry Flow Air Filter Wrap
7. Unichip Q with cut off module
Phase 2 Parts: Piston Upgrade
(Mitsubishi Part Numbers)
1. +0.5 Piston: 1110B464
2. +0.5 Piston Ring: 1110A499
Clearance Between Piston & Cylinder Specs:
6G75: 0.02 - 0.04MM
Notes: Fuel economy more or less stayed the same after the upgrade and no heating issues even when driving the car hard
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Modification List: Engine Upgraded OEM +0.5 Pistons, Ported Cylinder head & intake manifold, AEM Filter, Evo Spark Plugs, Unichip Tuning, Headers, High Flow Cat, Transmission Cooler, Omani Gear Hack to prevent auto shifting, Dobinson MRR Remote Reservoir Shocks, 2 inch Fender clearance & wide body kit, 17" Method Rims, Geolandar ATS, Extra AC Fan, LED Lights, Bush Skinz front & sump bash plates, custom bumpers, Panel Switch, Dual Battery, Paddle Shifters, Pedal Commander, TPS System, Front Diff Simulator
Car Photos: www2.pajeroclub.com.au/forum/...
Video Tags:
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[@noble7104]

This is a really good video , your discussion and commenting precisely laid out. I can watch this video over and over again - very informative. Again hats off to you.

[@philiproszak1678]

Amazing video! I have a SWB 3.8L here in Japan and I'm amazed how little of a Pajero community there is here. I'm going to look into the Unichip. Sounds like exactly what I want.

[@garrettcox]

Nice. I just dyno tuned my Gen 1 3.0L with similar mods. They actually respond to tuning quite well. I ended up with 25% more power.

[@obyafy1]

Great video with precise and clear information 👍👍👍👍

[@GForceVRX]

Great video!

[@marcosrou]

Excellent video! Very well presented, thanks for sharing this information.

[@mohammadb.7036]

Very informative and impressive work done here ✅ thanks for sharing

[@elruco264]

That has to be one hell of a fun Pajero now! Would love one of same spec!

[@sundeepsunil5686]

This video is gold❤️

[@ow9196]

What a safe but powerful way to get maximum performance and reliability from a proven engine.

[@marksegui6471]

Nice built btw🙌🏼🙌🏼🙌🏼

[@ahmadmohd8595]

You can get few hp if convert the mechanical fan to electrical fan

[@fahadfaraidy6071]

Great project, smart safe way to increase performance. I have 2008 with a replaced all most new 3800cc engine of 2016. I am thinking to do the first phase and fixing a small turbo ( with air cooler, connecting to the main radiator to cool the turbo, connecting to engine oil cooler for lubrications) with no change on engine. do you think it will work ???!!!

[@sasquatchfoote8235]

RPW in Perth Australia sell cams for these motors too

[@PETERNESS]

i squeezed a considerable amount more for way less than rebuilding the 3.8 with pistons spark plugs high flow cats and a muffler ,i just went to my local wreckers and bought an LS1 ,found an engineer to make me an adapter plate fror the 460LE transmission to bolt up to the transfer case and now with a maffless tune headers single three inch exhaust and a VCM710 camshaft it puts out near 488 horsepower at the wheels ,i have upgraded the fuel pump and stage 2 fuel injectors which flow close to 1100cc,all for under 5000 dollars ,lighter engine more power more reliable and better much better fuel economy

[@frabbat]

Very nice project!

[@Jonathan.R.Pereira]

Do you think that with stock parts in Stage 1 and just the unichip you would have gotten similar power gains?

[@trippen5017]

Where did u buy the pistons from

[@xXWillyxWonkaXx]

Love it! Very dope what you did. I have 2 questions. One, after the upgrades, have you noticed a change in the petrol consumption if you're driving from destination A to B (e.g. home to work) at an almost constant speed (e.g. 100km or 120km or less)? Does it drain more petrol than when it was in its original form without the upgrades?