Alright, I didn't read the entire thread, but here's some info. If you look at a dyno chart of your engine with it's stock 7000 (ish) rpm redline, you'll notice the power peaks around 6600-6800 rpm then starts to drop. Going beyond that point your engine starts making less power (simplifed, the valves are opening and closing so fast at those speeds, less air is actually getting into the engine becuase your cams don't have enough lift or duration) and that will continue to drop. Also, your stock valvesprings aren't built to go above the stock redline and may not be strong enough to push the valves closed when the cam lobes leave (call valve float) leaving them in the middle of the combustion chamber when the piston comes flying up, they make contact and your engine is destroyed. Upgraded valve springs will help protect your engine from the extreme rpms but without upgraded cams, the extra rpms are pointless. Changing the VTEC point is also pretty much without benefit with stock cams because Honda enginners designed the cams to operate at exactly the rpm they use. VTEC's not like a nitrous system turning on, it's a mechanical swtich to a set of high rpm cams that are designed to work in a specific range for maxium efficency.

Long story short, upgrading your ECU to raise the revlimiter or change the VTEC point is bacially pointless without other very serious engine modifications (specifically a cam upgrade, valvetrain upgrade and maybe grinding/porting work). If you've got some money burning a hole in your pocket, access to a dyno and want to make some sort of electronics upgrade, consider a fuel controller like a V-AFC. You won't find my performance changing the VTEC point with one, but minor adjustments to the fuel maps can help free up some extra horsepower and make the most of the modificaitons you already have. Tuning without access to a dyno is basically pointless though as the power differences will be almost impossible to "feel" but may add up to a small difference in 1/4 times.

 

Who wants this chip? me or you?
1. I do have vtec....

Also, I had a friend buy an ebay chip for his vette, he bought it because when I bought my vette it had a chip in it, (has to be like me) and I took mine out and he took his out, side by side no difference what so ever! I payed 245.00 to buy the chip and 25.00 to have it installed befor I got the car.
Another thing..... I have a cold air intake I made myself, same as the one in the store for 250$. I spent 25. I was looking around and seen that somone spent under 100$ for a chip that they said improved there performance and they liked the fact that they could turn it on or off, good gas mileage to work and back and on the weekend, a fun car to drive around the track. I am looking for a upgrade for under 100$. I also want to know more about airflow sensors? Mine is stock and I know there is more cool air flowing to my engine, so i wanted to know if I should upgrade the sensor? As for a cam I plan on geting one, but not untill I come across an extra 200$. My corvette uses up most of my money, but she is almost finished, a new optima battery and im done. then I can spend my extras on my civic.

 

Did he have concrete, verifiable number stating that he increased performance? Did he dyno the car with the chip on and with the chip off? What kind of increases did he see? or is he going off his buttdyno? Until I see proof that these chips give gains, I'll discredit them. You speak as though you know about how to get gains out of car yet you ask about air flow sensors. Funny, you should know that the civic doesn't have air flow sensor, they have a manifold absolute pressure sensor, not a mass air flow sensor, and unless you have some sort of forced induction and are running more than ~11 psi, then you don't need to upgrade the sensor. Sure you could get a 3 BAR MAP, but you'll be just wasting your money until you go FI.

 

ok, I donot know much about honda I admit, I know more about carbs and cams.... Yes we both dyno'd our cars the same day, he has 7 more HP than I do in my vette. but he also has a larger edelbrock throttle body, and I have a ram air setup, other than that there is no difference between our cars, his 350 has 7800 miles and mine has 5849 miles we rebuilt the engines together..

 

cool. I'm glad that SOMEONE who has a vette isn't just straight talking shmack about imports. Sensors can be a beeotch tho huh?

 

Yeah, I bet if I didnt ever reply to this thread it would have kept going without anyone ever knowing the reason for it....lol.... People need to calm down and go off of FACTS not what they have heard or think......

 

if you're interested in a Dinan chip for a d16z6, I have one that came out of my p28 when I went hondata. It was in the car when I bought it, and scooted pretty nicely. I have never found any specs on it, just that it existed....

 

I thought Dinan was strictly a BMW tuner.

 

That's what I thought too. I found some info on the chip when I first found out it was in the car, and it clearly has the dinan stamp on the chip.... goofy as hell, but it sucked for mileage, and gave it some torque....

 

Spoon, mugen, PYR, Skunk2 et al.

Don't tune D series motors.

Fakes.

-PHiZ