How to add power to fully stock r18

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.

Megaman X said:

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.

Click to expand...

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.

Megaman X said:

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

Click to expand...

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

Megaman X said:

just bought the pullies they were on sale last set for 159 so I hopped on it. lets see how much more power I get out my setup will be interesting

Click to expand...

Let us know how much more power you got

Ill be poor man boosting my r18a too. Exactly like how listed except with rods pistons and head studs. Hopingi can run 17 to 24 psi.

Megaman what are your numbers youre making? Im building mine just to bully some local competition. Im hoping for 420whp

Megaman X said:

LOL the highest whp r18 (which is dismantled now) made 515whp 420tq lol you want to compete with that. He was fully built everything. Also here in Texas we have the second highest whp r18. I know him Carlos he is like 420whp 365tq and he has a built motor. The stock motor cant handle more then 300tq so yup your def have to go built if you want those numbers with a big ole boy turbo. I have not decieded if im going that far with building the block yet. I rather finish up doing the built transmission to add LSD and gearing set to increase acceleration. everything else on my car is built

Click to expand...

Well id be doing everything except sleeving the block. So ill see how that goes i guess. Im just waiting on the rods now already have pistons, head studs and valve springs. The guy i was competing with is here in canada with a si with a built k24 lol

What did they do for a fuel rail?? I cant find an aftermarket on for this engine anywhere

Well i was considering that but i couldnt source a crank from anywhere, apperently the r20 is from Europe. I havethe motor pulled apart and notice the the r18 actually has a vtec lobe on the came even though its not used the traditional way. Ima try to revert it back to the original vtec and see

So i ended up building a motor and turboing the car. I did a street tune up to 15psi and the car feels nuts. Dyno this thursday

Megaman X said:

so now im interested in what you lay down. motor is built you said since the last comment I have done a lot but as you know covid has slow down a lot of progress. the pulleys made a difference I made more tq as expected with a tune. I want to see what you end up doing. how much for the built motor total and whats in it exactly. 15 psi nice. I still have a lot of room to grow in mine thinking about getting innovate electronic boost controller. aem truboost was not acting the way it should

Click to expand...

Rods b18c nippon pistons 2 head gaskets arp head studs torqued to 100ftlbs. Thats about it motor wise lol

Megaman X said:

so now im interested in what you lay down. motor is built you said since the last comment I have done a lot but as you know covid has slow down a lot of progress. the pulleys made a difference I made more tq as expected with a tune. I want to see what you end up doing. how much for the built motor total and whats in it exactly. 15 psi nice. I still have a lot of room to grow in mine thinking about getting innovate electronic boost controller. aem truboost was not acting the way it should

Click to expand...

The motor had b18c nippon pistons ran me 380cad
Some hbeam rods around 400cad
Arp head studs 210cad
Full supertech springs ti retainers 850cad
I ran 2 head gaskets 140cad thats about it, arp2000 rodbolts in thsle rods from my kseries since i upgraded those

Megaman X said:

that all sounds bad to be honest. Boost spiking is not good man. that should have been the first indication something is seriously wrong with the build or I would say the tune. Im surprised you even turned it up with it not being tuned properly. There are several packages for pistons and rods made for the r18 all that you listed I am not familiar with so there's that. Blowing a motor sucks and just puts more time and money down the drain. sorry about that been there done that.

Im still thinking if I even want to build this motor or not. I just want my 270whp/260tq. Im more concerned with looks and acceleration. Right now im so on the lets get a fully built transmission. that will increase my acceleration by 20% and I can get a LSD. WIN WIN.

Click to expand...

Boost bike was caused by the internal gate, wouldn't vent enough. When i turned it up to 18 pounds there was no Spike above 18. It sat there there nice and happy. Oh and the car was tuned hence the dyno sheet. Adding fuel and pulling timing for a extra 2psi wasnt difficult on the street. My air fuels were great.

The build may be of parts that dont make sense, but being on myside of the border and also through the pandemic mad thing extremely expensive. A set of forged r18 pistons to my door was like 1200cad vs my 380. I have like 38k so far in my awd k24 build. My r18 i can mess around with for cheap and still have loads of fun. I value your opinion though what works for some doesnt for others. As long as we're all getting what we want its all good haha!

Haven't finished my r20 yet but it's coming along. Also building a compound turbo setup for it. Gtx2871 and then a hx40 atmos turbo

Kevin1166 said:

I tried Naturally aspirated R18.
R18 Naturally aspirated

Click to expand...

The video says twin plate clutch where did you get one I want one for mine

Kevin1166 said:

INNER MOTIVE
It's made in my domestic.
View attachment 243318 View attachment 243317

Click to expand...

Please please please can you help me get one? How much torque is it rated for