K-series mod kaki pls come in

[nates_GTR]

Anyway return to the topic.
What are the best final drive to use?
4.7 or 5.0?
Consider using 16inch rubber.
Anyway i'm the new owner of white eg k20a.

Consider my previous experience when i send the car to Avantgarde. It sucks.

 

[JINEIL2EN]

4.4, as Loo says....

 

[nates_GTR]

are you sure 4.4? If go for turbo maybe i'll agree with you. But for NA it'll drop the powerband much further. That mean you will out of vtec zone in every gear if you cut at 8400. Through my calculation need to rev up to 9300rpm so that it will stay in vtec zone. Tough your speed will be more higher. I calculate using standard dc5r ratio.

 

[dcloo]

are you sure 4.4? If go for turbo maybe i'll agree with you. But for NA it'll drop the powerband much further. That mean you will out of vtec zone in every gear if you cut at 8400. Through my calculation need to rev up to 9300rpm so that it will stay in vtec zone. Tough your speed will be more higher. I calculate using standard dc5r ratio.

4.7 might good idea for stock k20a k-swap with 16" inch rim, but if you have some upgrade of your engine like Mugen N1/k-pro its good for you to down grade to 4.4 final cause v-tech will kick in earlier at 5200rpm and rev cut at 8600 so you can run most with 3rd gear in turn 1,5,9,13,14 to get some better track time

 

[hattech-v]

jin, that 4.4 is for 25kgm torque laa....

 

[dcloo]

jin, that 4.4 is for 25kgm torque laa....

now looking for 4.0 for 26.8kgm torque lol...

 

[JINEIL2EN]

are you sure 4.4? If go for turbo maybe i'll agree with you. But for NA it'll drop the powerband much further. That mean you will out of vtec zone in every gear if you cut at 8400. Through my calculation need to rev up to 9300rpm so that it will stay in vtec zone. Tough your speed will be more higher. I calculate using standard dc5r ratio.

dude, can or can't keep the rev is depends on skill, not only the power or ratio... thank...

 

[JINEIL2EN]

jin, that 4.4 is for 25kgm torque laa....

Loo oredy made the revised statement liao... hahaha... not 25kgm anymore....

 

[hattech-v]

now looking for 4.0 for 26.8kgm torque lol...

pergh..................

 

[manhunt]

redhead k20a owner reporting in... anyone knows if there's already titanium valve n titanium spring in the market for k20a?

 

[dcloo]

you could looking for Fierra but the price not cheap

 

[hattech-v]

its ferrea....

 

[JINEIL2EN]

change to those val-lor...can add how many horse powder..???

 

[sybaritic]

its ferrea....

no......ferreira.............even not roger federer....

 

[nates_GTR]

dude, can or can't keep the rev is depends on skill, not only the power or ratio... thank...

Though i agree skill play important part, nobody can't deny the importance of properly tuned machine. Take out the ferrari from micheal shumacher and give him those minardi car. He'll be nowhere near top ten.
Ok guys, through my experience of playing those vtec machine. When you put in those after market cam, your powerzone will shift toward higher rpm. If you running through Crower website, it cited that Stage 2 cam will make power up to 9000 rpm. Which is true since my dyno graph read 235whp@9100 rpm. If you say cut at 8600rpm, that will be about 10hp losses.
One more thing, i've read in k20a.org website that vtec function shall only be activated at 5500-6500 rpm to avoid damages to vtec system. How true of this claim remain unknown for me.