How to add power to fully stock r18
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I'd recommend intake, header, exhaust and hondata flashpro. If you are looking for more gains than that then I would start looking at either a turbo kit or Kraftwerks supercharger. Jackson Racing might make one too for the R18 but I am not 100% on that.
The R18 has integral exhaust in the head. Limits what performance mods will produce. That being said a good turbo ( not eBay crap) will likely yield the best performance. The cost of a good turbo I’d be hard pressed to put that against a R18. A K20 would be a better start but lots of necessary changes.
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lol this is the R18 section not the Si. So don't suggest he change cars thats stupid and would cost more money. I have a pretty heavily built r18 yes its boosted yes it has a Skunk 2 cam yes it has meth yes full suspension and Custom big brake kit and tons more. Just go look at my profile to many mods to list. So I know a lot I'm one of the OG on this forum when folks just finally got a boost option and hondata, You need to first figure out how much you are willing to spend. That always determines what you can do and where to go. Also how far are you going with this build. Spend some serious time with that and get back with us.
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Ralco RZ lightweight pulley set which replaces the alternator, water pump and crankshaft pulleys (3). My car is strictly commuter but this frees up a little HP and torque that you can def feel. Wish it was the 1st mod I made years ago when my car was new.
hmmm I thought about doing pullies but I heard of to many horror stories of belts slipping off due to these. Also folks could not really prove you gained any power from doing this. More like risk then reward.
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A lot of ppl have had success w pulleys. I made sure the diameter was the same as stock to maintain the same size serpentine belt and that I replace the belt w a fresh one which was due anyways. Underdrive or smaller pulleys typically require a smaller belt size and may result in issues.
My pulleys went on at 220k miles and I’ve done 11K miles without any issues. I recommend them because you will feel better response and actual torque gain thru low to mid rpm range.
Other minor mods I did and felt made an improvement are E3 spark plugs and a drop-in K&N air filter. Also ditched the stock steelies for lighter 16” RSX alloy wheels which wasn’t too noticeable.
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90 Posts
Buy a turbo kit off eBay, 450cc inj, 225 intank pump, get a flash pro, run 8-10 psi. Done. On the return less system thats the cheapest way to make power.
Na wise. Dont bother unless youre trying to be different. And believe me im all about being different, if youre looking for pure function turbo the thing.
Ebay stuff isnt too bad for the price. Whats good about most r18 kits is that the mani is a small casting so the dont crack like the tubular ones. My last ebay turbo lasted me 3 years(on my 1.8t) ran me 400 so not to bad.
Na wise. Dont bother unless youre trying to be different. And believe me im all about being different, if youre looking for pure function turbo the thing.
Ebay stuff isnt too bad for the price. Whats good about most r18 kits is that the mani is a small casting so the dont crack like the tubular ones. My last ebay turbo lasted me 3 years(on my 1.8t) ran me 400 so not to bad.
Hold on what pullies do you have again. Send a link to them. These so called stock size ones?? I'm sorry but undersized pullies cause belts to slip they just do. Also if you have stock sized pullies you are not gaining any benefit so I don't see how you gained response. What is it made out of a different metal sorry man I call BS. Also if you want better response you need to add a turbocharger or supercharger.
What turbo kit?? The Emusa kit?? None of those ebay kits are direct bolt on kits. They all will require modification. intercooler piping for one. Hope you get a proper manifold. The great thing about the R18 platform is the boosted options are not to expensive. Avg price for kits is like 3000. But I would be wrong to not mention there is a lot more that needs to go into any car then just buying a kit. Tuning for one exhaust is another etc.
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I'm not sure what kits are out there, after I'm done with my SI build I did plan to boost my r18 daily. And pretty much that's exactly how it's going to do it, I'm not the greatest of tuners but I have tuned a good amount of cars that have lasted years. These 1.8 so very Stout so 8 to 10 lb won't cause much problems. Not sure what someone could do with exhaust but I have 2 and 1/2 all the way back on why r18 that I took from my SI.
Still i believe turbochargering these little engines is the best bet. 3k in parts only would yeild some great results. If OP isnt a diy guy then thats a different story.
My R18 has been boosted for awhile now I have a laundry list of mods done to mine. Good choice I might get a 4 door just to Mugen RR it and of course boost it or a s2000 and boost it as well we see. Type-R?!?!?!
BTW FYI
SI parts FIT on the R18.
the only peaces that don't would be MOTOR parts because of different engines but exteriorwise interiorwise even bbk kits exhaust would all work just saying but alooooot of my parts are Custom made as I love being One of them Ones
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I know exactly what you mean by being one of them ones! After my all-wheel drive systems finished on my car I'm going to be exactly that hahaha. I love my little r18 4 door, I beat the hell out of mine all day and have put some very serious cars to shame on highways in and out of cars. Do you have a build thread I'll take a look?
To the OP boost the thing man. These motors have really good bottom ends, so they can handle a fair amount of boost stock, 8 to 10 lb should have you at least in the 230whp range. In this thing that would be hard to keep up with
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Boosted or NA, these will still be effective in decreasing parasitic losses. I installed them myself and yeah same exact diameter just lighter weight.
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OP what are your build plans for your ride?
I don't make threads anymore. not enough traffic honestly. A thing of the past just look at my about me also have a youtube channel check it out. Lots happening right now to the r18 tons of cool custom mods. Im sure you will enjoy the content and give yourself ideals. If interested I have a lot of custom parts for sale as well spare parts
A completed cabon fiber replacement dash
Weapon r intake manifold
p2p throttle body spacer
etc just to name a few
As I stated they had to just be lighter weight to keep the belt from slipping. Now I am interested. I just emailed them to see if I can get a custom set made. I have to be different show folks what a r18 can be. It will be a nice add on for my retune coming up.
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Let us know how much more power you got
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