After some searching I can't find any threads on boosting a stock B18C5 motor, i.e. whats a good safe dd psi to push, what's a good kit to use, numbers from the turbo upgrade and so on. Any help I can get on this will be greatly appreciated.

 

shoot me a pm i can do what i can to help shoot you in the right direction.

 

pm'd you

 

Check jeff evans website

 

I was looking for this exact same thing and found quite a bit of info. Search b18c5 in the forced indusction forum and there are some results.

 

cant even pm you anymore. says your inbox is full.

 

Stock 10.6:1 CR, I would do no more then 5psi and large injectors (550cc) and Hondata or AEM management. My R lasted 2+ years like that, but trust me. No matter what anyone tells you, you will be on barrowed time to a certain extent.

 

have seen more than a few tuned around 300whp. usually comes around 8-9psi on a 50trim.

 

i know I guess since im new to the boards I have to post 5 times before they'll let me have a real inbox.


Was that on a stock block ? and what was it tuned with ? any other mods?

 

What ultimately limits you with the R is the compression ratio... You can buy a thicker headgasket to lower it but the high CR piston design will eventually limit flame front travel on a boosted app and could potentially cause knock/detonation.

 

this one was crome pro but you can use hondata, neptune etc. if you know a good tuner that can datalog correctly and has done enough he knows what kind of timing can and can't be used it should be fine. the last one i was referring to was totally stock other than a full 2.5" exhaust.

what can really bring on the detonation is if the car is tuned on a 60deg day and not ran all that long, pushed to the edge and then, when it's 100deg out and the engine is heat soaked you could have knock pretty easy. this goes back to the tune and knowing how much timing you can use

the s2k is 11:1 just like the jdm ITR and look at the numbers those are making stock, same with the z06, i've seen boosted c5 z06s that were totally stock and that's another 10:6 or 10:8-1 engine

 

Use E85

 

Head spacer with a good turbo, and 350whp should be safe and last for some time.

 

I have had my b18c5 boosted making over 300whp for about 6 months now and it is my DD but i do have forged pistons and the comp is around 10.2:1 maybe a lil higher with my milled head. It runs strong. No issues. i love my setup i have driven in some of my friends boosted hondas and i just hate the lag their motors have making no damn power w/o boost. I was going to run it stock but i couldnt bring my self to spending all that money on a turbo kit and tune just for my motor to take a **** but it is really all in the tune. Anything is possible. To more directly answer your question 300whp should be safe as long as you buy reliable parts and have a good tuner. I wouldnt even start my car til my tuner came to my house to give me a base to make it to the dyno.

 

typically higher compression ratio means it goes pop easier.

there is a lot to read on the site about why and i dont feel like typing a book about it when the info is pretty easily to obtain by searching for a few mins. basically in a nutshell they arent the best motors to boost compared to an ls (lower compression ratio) meaning more wiggle room for something to happen before it ***** the bed on you. it can be done with a good tune and like people stated a thicker headgasket would also help out. its a pretty expensive motor to blow up so i would be careful. good luck

 

don't blame you...BUT

why didn't you just run the p73 ecu, stock injectors and either leave the tube off the TB or take off the BOV so the engine wouldn't pressurize as you drove there?

 

U can boost anything. It's really not a big deal. My stock engine s2000 boost around 9 psi and a ball bearing 50 trim and it makes about 335whp on 91 octane. It has the stock 11.1 compression. I also drive it everyday with no problems.

https://honda-tech.com/forums/forced-induction-16/results-my-custom-turbo-kit-my-s2000-2874827/

 

i didnt want to rewire my obd2 injector clips back in to run my stock injectors but more so for 2 reasons. My tuner lives down the street from me and it was my first turbo build and i did it all on my own. So i didnt want all that time and money to go down the drain over something stupid that i over looked.

 

with inline pro head gasket I made 309whp on very high boost from a greddy turbo kit years ago tuned on hondata with 880cc injectors. It all comes down to tuning and on a stock block you can't beat the inline pro head gasket