Best engine to turbocharge

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Originally Posted by ProECU

I wouldnt touch a decompression plate (thicker gasket) for this very reason alone.

the "Mechanical Octane" obtained as a result of the quench design of 4valve honda head will be lost. This design property along with the exhaust volume bias are what make honda combustion chambers so efficient.

Doing the reverse is not only effectively insulting Honda engineers but decreasing combustion efficiency.

Ive seen a B16 boosting 16psi WITH decompression plate making less power than I am at 4.5psi. If you dont believe me, I'll ask for the graph overlay to prove it.

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This statement is exactly on the mark. The same thing was tested at AVO with the same results of the spaced engine losing power.

Thank-you!

There is a common misconception that more boost = more power, or is it just bragging rights?

so im guessing u could turbocharge any honda engine at a low psi without doing any damage..
am i right?

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Originally Posted by Paul1985

so im guessing u could turbocharge any honda engine at a low psi without doing any damage..
am i right?

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that's a HUGE blanket statement...

I would say that yes, most honda engines could be turboed at low psi, given PROPER TUNING...

that's the key... use the wrong tuning and you can make an engine pop at 1 psi... really depends a lot

turbo the D series motor, say d16y4/5
its safe cause there is no vtec, so drop the compression ratio. run above standard boost, external wastegate. and think about getting your internals done for peace of mind

what do u guys think

why drop the compression ratio? it's already plenty low... having no vtec means the head doesn't flow as well, you'd make more power on a vtec head. internals are really dependent on how much power one wants, by no means necessary at lower boost levels(<10 depending on turbo size, obviously 10 psi on a t25 is goign to act a lot different than 10 psi on a t67).

what sort of psi would i be able to run off a b16a if tuned properly??

I have had guys drive out of my shop on stock internals running 12 psi. I did not recommend this to them, however they asked for an adjustable boost controller and i granted their wish. They cranked it to 12 and 2 out of the 3 have been running fine for over a year. All cars were finely tuned using uberdata stand alone fuel management. My suggestion would be 7 psi. You can make plenty of power at that level with a nice A/F tune

8 or 9psi will be fine but 7 is very safe. Those engines stock will handle 12psi but thats borderline. Make sure its dyno tuned properly tho

nice, i think id be happy with 8/9.. might have to look into this for a future mod (new engine 1st)...

also.. what are the most common kits used on these sort of engines??
garrett, greddy ???
any other popular kits used by honda enthusiasts???

the reason that most d series are turbo'd is because most people can only afford one or the other turbo/engine conversion. B18c in my opinion would be the best to turbo, high compression yes... but that only means it cannot handell much boost on the internals as is. you can alwayes get a decompressed head gasket and lower the compression and still have your VTec and the abillity to rev out to 8.5grand.
Or get forged internals (low compression or normal compression) and still run boost.
many combos available, but dont let dickhead tell you the a non vtec turbo is better then a vtec turbo...

decompression plate was tested by avo and didnt work. the engines performance went backwards so best not 2 crack the engine open.