Vtec Power??

[Nameless EJ6]

i did own one...for over a year. it was my daily driver/beater. and the engine does not have to be up to operating temps for VTEC to engage. it takes about 20seconds. i don't know what the exact parameter is but from my personal experience with the car i owned .as long as it was warm enough to idle at the normal RPM then it was warm enough for vtec.

Yes, the engine does have to be at operating temp, that is the parameter Honda has set. I don't really care what you've owned.. it's factual information that I've verified for myself on numerous hondas. Anyways,I still don't believe a GSR/B20 setup will hit 10's with 230whp. There's no possible way even with slicks. I've been with Hondas for years and I've never seen a Honda under 275hp hit 10's in any hatchback from 2000+ pounds. I've never even seen a stock B20vtec setup make over 200whp either without headwork and better cams than a GSR/ITR/B16. But yea, you don't need to convince me.. I don't think I'd believe it without having worked on it myself and seen the miracle from the beginning. Not trying to be rude here sorry if I come off as an a$$.

[Nameless EJ6]

I know they do.... I would do the b20 as it usually cost less and has about 40 more chp. The itr engine puts down 175ish at the wheels while the b20 vtec hybrids I have built put down 215whp so roughly 240ish chp. Its and easy build and can run off the itr ecu.

A GSR/B20 buildup won't run properly on an ITR ecuI can say that first hand. There is no activation for the IAB solenoid. The ITR doesn't use this.

[PROJECTRB240SX]

Its ok if you don't believe because I didn't want to believe it either. It does run on the ITR ecu because thats what we used on the first two motors we did.... the last one was a hondata ecu.It happend to runa 10.99 with slicks, lsd, and all the tuning mods we had done..... You are right though I called my cousin and this is the one that had the Hondata ecu so it was making quite abit more power.... I'll admit being wrong on that one because it was my mistake.

The compression was raised because we milled the heads and we used different pistons (can't remember which, I'll call my cousin for all my notes). The compression was quite abit higher to produce the power we were seeing.

But belief is in the actal product and If you get a chance I would recommend checking this build out as it was surprising to see what the results were. I'll be building another here soon as my friend wants one so I'll record the results.

[POS_S13]

Yes, the engine does have to be at operating temp, that is the parameter Honda has set. I don't really care what you've owned.. it's factual information that I've verified for myself on numerous hondas. Anyways,I still don't believe a GSR/B20 setup will hit 10's with 230whp. There's no possible way even with slicks. I've been with Hondas for years and I've never seen a Honda under 275hp hit 10's in any hatchback from 2000+ pounds. I've never even seen a stock B20vtec setup make over 200whp either without headwork and better cams than a GSR/ITR/B16. But yea, you don't need to convince me.. I don't think I'd believe it without having worked on it myself and seen the miracle from the beginning. Not trying to be rude here sorry if I come off as an a$$.

werd, erick aguilar's all motor hatch runs low 10's but its completly gutted, weighs like 1600lbs, 2.0 gsr motor. http://www.ericksracing.com

i didn't read a lotta the posts but vtec does make a significant difference. the LS(non vtec) motor makes 140hp at the fly; the gsr (vtec) makes 170hp at the fly stock. both usdm motors.

i'm in the process of buldin up a b20/vtec, i'm doin for the torque cuz the gsr motor lacks torque but has good high end power. its going back in my integra, not a hatch, so i won't have the weight advantage that a hatch does.

[gyfer]

doin for torque ? hmm.. :eh: i think you need more homework.

peace

[ca18det_boy]

VTEC=TURBO HYPE+TURBO TALK-TURBO POWER

[extheflow]

Yes, the engine does have to be at operating temp, that is the parameter Honda has set. I don't really care what you've owned.. it's factual information that I've verified for myself on numerous hondas. Anyways,I still don't believe a GSR/B20 setup will hit 10's with 230whp. There's no possible way even with slicks. I've been with Hondas for years and I've never seen a Honda under 275hp hit 10's in any hatchback from 2000+ pounds. I've never even seen a stock B20vtec setup make over 200whp either without headwork and better cams than a GSR/ITR/B16. But yea, you don't need to convince me.. I don't think I'd believe it without having worked on it myself and seen the miracle from the beginning. Not trying to be rude here sorry if I come off as an a$$.

yeah i kinda proved that everytime i left my driveway...but whatever.maybe the V-AFC was stepping in.

[ca18det_boy]

werd, erick aguilar's all motor hatch runs low 10's but its completly gutted, weighs like 1600lbs, 2.0 gsr motor. http://www.ericksracing.com

i didn't read a lotta the posts but vtec does make a significant difference. the LS(non vtec) motor makes 140hp at the fly; the gsr (vtec) makes 170hp at the fly stock. both usdm motors.

i'm in the process of buldin up a b20/vtec, i'm doin for the torque cuz the gsr motor lacks torque but has good high end power. its going back in my integra, not a hatch, so i won't have the weight advantage that a hatch does.

Oh, and uh no.......much to learn grasshopper. Those numbers are wrong. +a b20 block+b18c1/c5 head will run like a raped ape for a bit. but the b20 block wasn't built for one of those heads. Yes it will work but its not a good idea...sorry......

[goomba240]

^^^^ Im with this guy on that..That why I was cautious when I went LS/VTEC. It puts mass stress on the motor unless the internals are built. I would just go with a b18c1 or 5. Or if you got the money go for a JDM B18c6/7. They wont make much more power but the resale is increidble..Ive seen eg hatchs with b18c6/7's go for WAYYY more then they are worth.. To anyone that is planning on going LS/vtec I suggest you use a second generation B16a head. Ive read the dyno charts they flow better then a stock usdm b18c5 head, which is why I am switching to one. That brings me to my next point im selling a complete usdm b18c5 head. I will sell modded or stock. PM me if interested.

[Nameless EJ6]

A B18c5 ITR head is exactly the same as a B16 gen 2 head. They're identical except for the valvetrain. I'd like to see the flow chart or dyno sheet showing that a B16a head is superior to the ITR head, or where you heard that info. The ITR/CTR head/valvetrains are far better than any other B series motors.

Next, there is no such thing as a JDM B18c6/c7. Or c* for that matter. All JDM B series motors are either B16a or B18c etc. There's no prefixes on the end in Japan, those are designated for other countries. USA has the c5, Canada has the C6 etc..

On the subject of LS-B20/vtecs, revving them over 7500 rpms usually is the cause of them failing. They either heat up too much because of the lack of oil to cool the rods/pistons down, or the owners crack the B20's weak sleeves. B20's have rather pathetic sleeves. It would almost be worth it to resleeve a VTEC block to 84mm instead of using a B20. On the oil subject, I've seen a couple B20/LSvtec motors with purple rods from overheating. I laugh everytime I see it. Case in point, LS-B20/vtec is not a very reliable setup for high rpm racing unless built.

[Muad'Dib 701]

[quote=" POS_S13 i didn't read a lotta the posts but vtec does make a significant difference. the LS(non vtec) motor makes 140hp at the fly; the gsr (vtec) makes 170hp at the fly stock. both usdm motors.[/quote] I hope you know more about Nissans than about Hondas. First of all, this is coming from a Honda owner. VTEC isn't anything great, it adds a few more peak hp. Seriously, dyno an ITR then remove the wire to the VTEC solenoid and dyno it again. All you will see is a few peak hp lost, I guarantee.

Second, how much do you know about B-series motors? Do you know that the displacment is different in B18b's (ls) and B18c's (GSR/ITR)? Did you know the heads have different flow rates? How about different compression ratios? There are a lot more differences I could list that are why the ls makes 140hp and the gsr 170hp, but VTEC isn't one of them.

[trojanjg]

ITS ONLY LIKE 4 OR 5 HPNOT MUCH OF A DIFFRENCETHAT GUY IS JUST TRYING TO JUSTIFY HIS *** KICKING,

[BoostFab]

lol put an end to this worthless thread

[ca18det_boy]

lol put an end to this worthless thread

:Werd

[gyfer]

I hope you know more about Nissans than about Hondas. First of all, this is coming from a Honda owner. VTEC isn't anything great, it adds a few more peak hp. Seriously, dyno an ITR then remove the wire to the VTEC solenoid and dyno it again. All you will see is a few peak hp lost, I guarantee.

Second, how much do you know about B-series motors? Do you know that the displacment is different in B18b's (ls) and B18c's (GSR/ITR)? Did you know the heads have different flow rates? How about different compression ratios? There are a lot more differences I could list that are why the ls makes 140hp and the gsr 170hp, but VTEC isn't one of them.

Maybe after changing the head, you didn't tune it properly to get right power. Downgrading lift and duration, just like swapping a "streeter" cam shaft or VTEC not engaging, is hard to convince you just lost a few hp. Like you said, different engine head has different compression ration, and flow rate, this also mean VTEC should engage at different RPM too...

just a thought. Peace