Yeah, its pointless. The only time i would shift 500rpm above redline would be if i peaked out in whp just under or right on redline. Otherwise, pretty useless. 100 or so is fine when racing, but most motors will find a power loss if you go above redline. Thankfully, not too many honda motors do. Well, K-series anyway. I think the k20z2 does though.

 

K20Z2? Not familiar with that motor. What car is that in?

In most cases, The tack is off by a couple hundred rpm too so I don't trust shifting when my tack says 8600 cause chances are, my motors doing a couple hundred rpm above that and that would be bad for my motor. Thank goodness for Hondata and precise ECU control RPM cutoff

 

Sorry, meant k20a2. Which i just looked it up and it doesn't, for some reason i thought it did loose power right after redline. Oh well.

k20z2 doesn't exist, at least not that i'm aware of.

 

Haha, Oh alrite. Yah, I was like.. Z2? Never heard of that one before! Yah, K20A2 doesn't lose power, but nor does it gain any power. And that's coming from a K20A2 owner I love my motor.

 

k20a2 in my opinion was better than the current k20z1. While the k20z1 has a little more power from the start, k20a2 responds slightly better than the z1 with mods, at least from what i've seen. Overall i could be wrong though.

I agree with hondasi, i would overall compare the k20z3 to the k20a2 in terms of performance how overall set up. Both are very, very similar while just slightly different.

 

I wish Honda could bring over some more of their jdm motors here. Like the B16c's and a few of their B20's we don't have.

I personally would be sold in a heartbeat if they brought back the civic hatchback, but with a B16c or something like that in it. So much aftermarket for those motors. I love hatchback's, part in reason why i bought a xb. But, i might be buying the Yaris in march when it comes out. The hatchback/liftback. Something about it makes me want it.

 

The K20Z1 has a litte more lower end power like you said because of the JDM cams which gives it more lift time. Both the K20A2 and K20Z1 are good, but it depends on what application because of the cams. The A2 cams are really good for boost because there the JDM cams have too much lift that HP drops at higher end RPMs. In general the A2 motor is designed for more top end power whereas the Z1 is lower end power.

I think the whole k-series motors are all very similar, all with minor differences for different applications. All in all, a great motor that responds to the proper mods really well.

Honda would own if they brought the B16c here to the US. I personally don't know so much about the B16c motor as I would like to know, but from what i've read and hear from people, it's a great motor as well.

 

Hey guys. I don't mean to say to anybody that they don't know their thing. If I come across like that I apologize. Anyway, I don't have 15 years of experience in drag racing. I spent much of my young life studying full time(I'm a Dentist). I do come from a town were they have a big Drag Racing following. Just ask any of your members from Puerto Rico(Like Masafina) about the Drag racing Track in Salinas.

I'm 39 yrs old and tend to post like a father figure(I'm an old fart,lol), but I'm also a quick study and had a lot fun Drag Racing my Civic. I really mastered drag racing my car. Club Si member and Moderator Yellowcorn( who ran 14.8 with only H/I/E on his 99 Si) tried to improve my times driving my car but couldn't come close(Needless to say he was frustrated that day). And what I described above is what worked best for my car. The reason shifting so high works, even if you had a dip in the HP graph at that point, is because when you shift the gear you land at a higher rpm, thus making more power than if you shift earlier. Of course there are always risks, but like I said I never had a problem. When they installed my Type R cams everything looked perfectly ok, granted that's just the head, but I never had any lost of compression or any valves or cilinder problems. Is ok to do it a few times like when you race, But I wouldn,t do it every day. I do use full synthetic oil, but I don't know if that's the reason why I never had any problems or if it is something else.

Anyway, I don't own a TC, but one of my friends, who's my partner in my Telecom Business owns one. We are always teasing each other about our cars. He's debating if he's going to go with the S/C or not. I told him to just do whatever makes him happy. That's what i laways do .

Peace.

 

I could be wrong, but the B16c5 is the motor used in the civic type-r. I really wish they would bring the integra type r back, even if they listed it as the rsx-s. I think it would sell like crazy if they had a rsx-r or rsx type r. They should also bring the Civic type r over here as well, i know tons of people who would buy them including myself. Being that the rsx-s has a k20z1, what they could do is use a H series, like a H22 but hop it up a bit to stand out more so from the rsx-s. Have around 220-230hp, keep to tradition of high end power with a 8,100-8,500rpm redline tuned properly from factory to have full use throughout all rpms. Have a six speed slightly more aggressive compared to the six speed the rsx-s and Si have. Hot.

Civic type-r is an amazing car too. I have a few friends with the usdm tegra type-r, i personally think the new Si compares in some cases to the older type-r's. Too bad they didn't sell as well as honda/acura hoped for, if they brought it back they would sell so long as the price tag wasn't higher than $25,000. Keeping to jdm traditonal, a/c and radio/speakers optional.

 

Hey hondasi, have you compared the Si to a rsx-s in terms of racing? I would love to hear about some comparisons as far as on the tracks because both are very similar.

Infact, i've seen a few flywheel dyno runs for the k20z1 and most have been around 205hp. Kind of shocking that Honda actually downplayed this one. There was a 205hp dyno test using the SAE rating too, but honda claims 197.