"all in all, psi is not your measuring tool to where u designate your stock "limit", its HP value. 12psi from Company X turbo may only give 210whp, which is still relatively safe on these L-series. past the 250whp mark is where i'd start thinking about build. Most companies are putting smaller turbos with their kits anyways." quoted from 03DSM-RSX, hope its ok with you

So to serve as a guide for all those who are planning to boost their l15a, how much can the stock internals take? Is 200 whp really safe? So no problems with highboost so long as I stay in this range right?

 

blackgd3-

O3DSM will probably answer you too, but from my knowledge, the answer to your question is YES. Increasing whp with intake mods is safe until you exceed the strength of the the engine's bottom end components- crankshaft, main & rod bearings, connecting rods & wrist pins and pistons.

Doubling the power output with boost components, properly designed, installed and adjusted would cause no problems. Add any more than that, you would be better off with a rebuild with higher strength bottom end parts. Even at that, it would be a "try it and see what happens" with no guarantees if you do this on your own. A professional engine builder would know in advance which brand of crank, forged pistons, etc. could be counted on to withstand the added pressures of radical modifications for power.

After that, you would have to have someone to follow you around to pick up the pieces of your transmission.

 

10.8 compression ratio is still relatively safe with boost. the higher compression=more power easily. lower compression will require more boost to make the same power, but gives a bigger margin for error.

yes, 200whp is def safe on the l15. be sure you have a competent tuner and using the correct tuning system. its critical to your engine's reliability.

 

x2, a good tune can get you good safe numbers. I am not all familiar with the L series yet. But what is used to manage it? I know k-pro was used on em2's,rsx's ,ep3's basically all k's and some 7th gen d's. Just regular emanage i am guessing, and I have seen srt-4's well above the 450whp mark tuned on emanage.

 

Thanks for all the help guys! I hope I reach my target though I will be using an e manage blue and I do know a very good tuner.

 

I'm curious to know if any of the R18 or R16 parts from the 2006 Honda Civic would fit into the L15A, with some minor machining. It has stronger internals.

 

do NOT use emanage blue. the tuning capabilities on that unit are very limited.

i'm currently using emanage ultimate on my brother's supercharged scion tC and i can tell you it is worlds different from the Blue. Safer tuning parameters and fail-safes can be programmed via EMU.

EMU is by far the closest thing to a standalone system that is within a reasonable price. Motec, Unichip, etc are too complicated for your regular hobby-tuner.

Tuning is the most critical, do not cheap out on it in any way.

 

hey 03DSM-RSX (sorry to thread jack) but i was wondering what you think about getting the jackson s/c kit (if and when it comes out)... i really want that little bit of extra hp but my fit is my primary car and i dont want to damage it...

do you think its safe to get or will it invariably damage the engine?

 

I just blew my engine at around 9psi boost on stock internals. Im around 185whp in my ge8

 

Definitely u have someone wrong maybe on your tuned! What turbo kit are u running?

 

Do you know exactly what blew on your engine? Rings lands , connecting rod?

 

It's not surprising that the engine blew.. the connecting rods on the L15A7 are the weak link.. the diameter of the bolts that hold the connecting rod caps are the same size as a 10mm bolt that hold in your fenders.

 

I have a 2007 fit L15a1 boosted with t25-t28 turbo at 9psi, today it's a big day for tuned with e85 also I want to increase 1-2 more psi, do u think to support 11psi my engine? 122k miles