As far as I have seen there is no reason not to boost a vtec.For a good thread on the subject check out http://www.hondaswap.com/forums/inde...ST&f=12&t=4016 this is a pretty good thread with good arguements on both sides.

 

Well overlap is the reason not to... So you get special "TURBO CAMS" which disable vtec so what you have is a non vtec dohc monda motor... Look at the b20 140 hp.... Now what do you think the baseline for a 1.8 or 1.6 liter is? Well I would say a B16A with no vtec would hit about 130 HP is that like the same as a ZC??? yes it is as a matter of fact I have a frend who spent SKRILL converting his ZC over to vtec (yes it worked) he has B16A skunkworks stage 3 vtec cams and a "B" vtec computer... Guess how much hp he makes? got 136 whp which can only be speculated to have 170=180 ish at the fly! WOW thats the same thing a B16A would make with skunkworks stage 3 cams a CAI and DC headers!!! AMAZING.... I have nothing more to say.

 

b18b...a hole 142 hp
b18c...170+ hp

compare power off the line and through the power band on a na engine and the vtec is always stronger since it has a stronger torque curve with good high end.

btw
how many of you actually looked at teh turbo grind specs compared to stock on B series cams?

http://www.crower.com/cat/import/honda/camshafts.shtml

Specs from Civic Si
Int-265 mid Exh-267
mid Int-219 mid Exh-214
mid Int-.412 mid Exh-.379 mid

Specs from GSR
Int-274 mid Exh-276 mid
Int-230 mid Exh-216 mid
Int-.423 mid Exh-.378 mid

Specs from Civic Type R (JDM Spec)
Int-278 mid Exh-280 mid
Int-233 mid Exh-224 mid
Int-.449 mid Exh-.417 mid

Stage 2 - Turbo special design. Short duration = low overlap, high lift for increased performance. Requires 68185 spring.
Int-280 mid Exh-276 mid
Int-230 mid Exh-226 mid
Int-.465 mid Exh-.445 mid

the "turbo" grind has more duration and lift than stock, unfortuneately it does not give more info about lobe centers...but all it takes is cam gears to tune out some overlap on stock cams.

 

Exactly which D series did he make into a vtec?mini me, nothing new or outstanding there,a Bseries head DOES NOT mate to a D series block without some SERIOUS remanufacturing.And as far as a b16 making a 170=180 ish at the fly,since they are stock from the factory with
B16A SiR II
Displacement (cc): 1595
Power (bhp@rpm): 170@7600
Torque (ft/lbs@rpm): 116@7000
Compression Ratio: 10.4:1
Bore (mm): 81
Stroke (mm): 77.4
Cam Design: dohc
VTEC?: yes
OBD: 1
Year(s) Produced: 1992-1995
Also nothing new or outstanding there either.So if you actually put stage 3 skunk cams (which would also mean new springs and retainers if your planning on revving past 7000rpm) a CAI,and a good header (not headers as there is only one head on a four cylinder)you'd be set at a bit more than 170 (stock) ish or 180 ish.As far as the vtec turbo question the is the issue of detonation due to the higher compression than non vtec,which can be tuned to non-existance and since vtecs make power at higher rpms,which is where you stay when racing,it can be said that turbo vtec will make more power in the upper rpms since that is where most of their available power is.All this is subject to different schools of thought and not everybody is going to agree,but the fact is there are many very,very fast vtec turbos out there as well as many very,very fast non vtecs.So really it comes down to personal preference and budget.


By the way H and K series are also vtec,so why say no to one and yes to another?

 

It was a ZC as in Jspec DOHC ZC.... Not minni me and I have never heard of anyone els doin it... Lot of work involved in that one der!

Why do I like H and K? Because they arent "B" ass motors... Im sick of "B" Ide rather have a "D" or a "H" <---- for damn sure.

 

Turbo cams DO NOT disable vtec. Race cams sometimes disable vtec, but not street turbo cams. And seth, have fun putting an h22 into a 4th gen, and a k20 swap into any non 7th gen is just impractical and stupid The way the motor sits in the engine bay throws off the weight distribution dramatically.

 

Personaly I could care less what motors you like or dislike,but hating on something that is good,for the sake of hating because it is "played out yO" is stupid.Period.Your friend did not (maybe he did but it was the biggest waste of time and money) put a B series head on a D series or as you call it ZC,It wouldn't take a lot of work,it would take a complete filling and remachining of both the head and block since the bolts,dowels,oil and cooling feeds don't match up.And like Dubster99 said there are cams that disable vtec but most turbo cams just change the duration,lift,and overlap.

 

Ferrea has rocker arms that disable vtec, they only ride on the high lobe. I think its kind of a waste to do that, but I guess it is cause the head of the B or H series jsut flows well enough that it makes sense to not have multiple cam profiles.

 

btw last i knew kenny tran was using stock b18c cams in his 810 hp engine.

 

I didnt say my frend used a "B" sereies head for starters, I said he MADE the ZC VTEC..... By having a machinist rework the head. It only cost him $450 to have them convert the head to a vtec one... Jesus