ummm your wrong.

 

barely any timing? should help with knocking...

 

The V-tech head/port design might flow a lot better than the 4G63 as well. That could make a huge difference in power when you increase the airflow.

 

No, it isn't smart, and reflects a lack of understanding between manifold pressure and ignition characteristics.

Anyone can run 30 psi on pump fuel, but they have to retard the ignition timing to do it. The catch is they won't make any more power than with 22-23psi and a more realistic ignition map.

What they don't realize however is with all that ignition retard, they will experience very high EGT, and they're just slowly destroying their exhaust system and turbo will all that heat.

 

lol that v-tec yo!! it works wonders

 

I don't know enough about Honda B-series to confirm either what you've said or what I've been told by others, but it is my understanding that Honda B-series engines have cylinder heads that flow significantly better than anything that came with a 4G63. IF this is true (and again, I don't know if it is), that will make a considerable difference.

 

I just figure it has to play a big factor since Honda engines are making 100hp per liter. The 1.8L GSR motor makes 180hp and the old 2.0L 4G63 non-turbo talons made like 135hp.

 

i just think that the vtec motors espically because of the vtec head design is much more efficeant in makeing power than the 4g63. i mean when you start boost b seris motors it seems like power can be made so much easyer than any other engine
does anybody also think so or am i wrong

 

You can rev the Honda engine another 1000 RPM's over the 4G63's redline too can't you? So with a big enough turbo to support the airflow up top you would make a nice gain.

 

i also agree but that still leaves out my second question

why can evos always run like 20-23psi on pump gas and built low compression hondas always run like 12-14psi max on pump gas. why cant hondas run 8.5 to 9 to 1 compression like that of the evo and still boost 22psi on 91 octane. for hondas that kind of boost lever is required of race gas. but they will still make more power than evos when that are at low compression and only boosting 12psi with all things being equal like the same turbo

 

ok, first off, one of my personal freinds owns a usdm integra type r, fully built block, full race gt35 turbo kit, built head and tuned for pump only right now. Last time i went to the dyno with him he dynoyed at 418 to the wheels.

Now a evo 8 with a STOCK block with a 35 turbo kit can put down about the same numbers as this on the same 93oct pump gas as we all know. There are alot of evo running 35r turbos with stock blocks at over 500 horsepwer with race gas tunes too.

So I really dont understand what u mean by this: "why do honda engines make so much more power with less boost"

They dont make SO much More power, And they dont push that much less boost.

Also understand that any STOCK 4 cylinder that can make 500hpw is in a ball game by itself.

Please dont misunderstand what im saying, i love hondas, i have owned 4, and i presently own a 4 integra untop of the evo. But I think that ur not reall givin a whole picture, plus ur comparing two different beast!

 

honda heads clearly outflow 4g63 heads. when u already make 100hp per liter NA and then add boost, its only logical. i would bet that if u made ur 4g63 NA even with same compression as the honda motor , the honda motor will make more power

 

i bet that integra of your make that 418whp with like 12-14psi
evos need like 22+psi to make that power

so i'm asking why can evos run more boost on pump gas when compression ratio and turbos are the same

and why do evos need to run so much more boost to make the same amount of power as vtec honda motors

i can simply conclude that a honda b seris motor has a much better head design and flows much more and therefore, makes much more power

but that does not answer the second question of why do can evos run more boost than hondas on 91octane pump gas with the compression ratos and turbos being the same.

 

.but they will still make more power than evos when that are at low compression and only boosting 12psi with all things being equal like the same turbo[/quote]


I have never seen a honda b series with a 35r turbo boosting only 12 punds make more then 350. My freinds integra boost 18 on pump 93

Also how high are u or u friends reving the biult blocks. Consider that stock block evo with cams and head studs dont go much beyond 7800rpm. This is important cause the turbo still has power left, but the stock engine on our evos really dont get tuned beyond that. Once built, its a whole different story!

 

This doesn't apply entirely, because it's on stock compression, but I just turboed a 06 Civic Si. Turbo is roughly the size of the stock EVO turbo. It does 250 to the wheels with 6-7 psi of boost. The EVO did that stock with three times that boost. Some of it can be attributed to drivetrain loss, and some to compression ratio differences, but it is nice to be able to make that kind of power with so little boost. And with the light weight of that car, it is pretty quick. I have also always heard the theory about the honda's exceptional head flow, but couldn't be bothered to even think about validating it.