Re: turboe'd 4G15
dun underestimate 4g92 mivec turbo.. it all depent how u mode and how much u spent......i currently having a mivec turbo...... major mod are hybrid gsr 1.8 block, fuel pump,fuel regulator,emanage blue,racing clutch,low comp. piston and conrod, turbo tdo5h rebore hybrid with tdo6 fan and etc.... spended almost 30k.... can play wif evos.... but i do smoked 1 evo 3 before...... so dun underestimate turbo... just dun mod halfway and go show ur blow of..... become a joke since a stock b16a vtec also able to smoke u......i recomment not to bot a 4g15 since the engine is already not that reliable at na mode (my experience, 4th years already oil leaking here and there)... save the money and transplant a better engine,recomment mivec 4g92 na.....reliable and gud fc... powerful also..... conclusion, if u dun hav that much budget, for get about the bot plan on 4g15, since it will shorten ur engine life and in fact it will also lead ur 4g15 to go to junkyard too....
In my humble opinion, through my shallow knowledge, and some little experience... Nothing isu durable if modded halfway or incomplete or improper modification...
As far as fundamental engineering is concern, we go back to the purpose the engine is designed for... Sorry, I'm not being offensive, but just imagine 30k on an EVO, what kind of result are we looking at, where every performance parts are cheaper and more durable...
Sorry for interupting again... Of course, money and good reengineering is everything automotive is all about. But as a matter of fact, there are also economic way of enjoying what we are having on hand...
Ok, for 4G15 BOT, U can look for 4G15 MAGMA pistons, which is a plug ang play low compression pistons for 4G15. On top of that, u can send ur valve for regrinding in order to achieve a turbocharged designed cam profile to reduce the overlapping so that u won't lose so much power at the low end. For fun purpose, MHI TD04L/GARRETT T25 is a nice turbo for street, but U'll expect the powerband ranged from 3k-5.6krpm. Nice for a 1.5 stroker up to 1.3 bars @ 6krpm.
If the car is to be used on street as daily drive, I won't recommend a TD05 16G, I'd advise to go for a TD05 14B at most or a TD04 HL with 1.5 bar of boost... It'll lead u up to 160WHP-180WHP... Very nice for street with not so much lag...
Management is something u really need when u turbocharged ur 4G15 as the ECU are mapped based on the Naturally Aspirated flow. E-manage is sufficient to control injectors up to 150% of the stock ECU defined capacity(cc). Higher than that, U'll face idle/low end rich problem. If you want to further increase or up boost, it's strongly advisable to have a set of injector harness and sub injectors for e-manage to handle access fuel requirement at full boost.
Basically, ur engine will last.
IF TUNED NICELY. If U've extra budget, go for standalones... U'll never regret one. The only reason for regretting getting a standalone is when U messed up with the tuner.
Afterall, it's ok to BOT ur 4G15. Just my 2 cents opinion. Happ modding.