G6X3 Cam Questions

[CPDSS]

Originally Posted by Rage

Love this cam. This cam not only needs to be dyno tuned..... but street tuned also. Take the tuner with his laptop for a ride showing him your concern. If they have any experience at all, they should be able to tune out most of your issues. Also agree with the possible MAF issue, make sure yours is a strong one. I only have bucking under load under 1500rpm. Drives like a dream any other time. Good luck

ok. so how do i check the MAF. should i have the installer check it or the tuner?

[Bell040]

Originally Posted by CPDSS

ok. so how do i check the MAF. should i have the installer check it or the tuner?

it's not your MAF, it's your cam. You should have picked one with less overlap (i.e. lower MAP)

you are a 1-2 on this scale




anyone know the "MAP @ idle" or the overlap in degrees for the G6X3?

[mikeSS]

my cam is not as aggressive as the G6x3. but i can say mine is very drivable. i can ride at 1.1K RPM all day.

[CPDSS]

Originally Posted by Bell040

it's not your MAF, it's your cam. You should have picked one with less overlap (i.e. lower MAP)

you are a 1-2 on this scale




anyone know the "MAP @ idle" or the overlap in degrees for the G6X3?

i did see this chart as i have been searching the forum all day. so cruising speed surging from 1400-1700 rpm is more normal for a big cam. but should it still be surging from 1700 say all they way up to 2500?

[Butcher]

Originally Posted by Bell040

it's not your MAF, it's your cam. You should have picked one with less overlap (i.e. lower MAP)

you are a 1-2 on this scale




anyone know the "MAP @ idle" or the overlap in degrees for the G6X3?

I don't think you understand what His problem is. He doesn't have a problem cruising at very low engine speeds (below 1300 RPM), He's having a problem above 1500 RPM. That is why it might not be tuning issue. I would be willing to bet that the MAF is showing erratic readings while cruising. If that is the case, then the MAF issue needs to be sorted out before it can be properly tuned.

[Bell040]

Originally Posted by Butcher

I don't think you understand what His problem is. He doesn't have a problem cruising at very low engine speeds (below 1300 RPM), He's having a problem above 1500 RPM. That is why it might not be tuning issue. I would be willing to bet that the MAF is showing erratic readings while cruising. If that is the case, then the MAF issue needs to be sorted out before it can be properly tuned.

He has had 2 tuners try to tune his car. One has 9 years experience.

My tuner warned me before I got a cam... he asked me to keep the LSA >114 degrees. I later figured out that he was actually trying to keep me at a conservative overlap by limiting the LSA.... so he would have a chance of getting it drivable. I trumped LSA with duration to get my lope (see my specs) which still ended up with +12° overlap (compared to -11 stock overlap)


Furthermore, I think some people feel surging more than others, and others have habits that make it worse. My wife thinks my car drives like crap (surges, bucks, dies, hunts for idle), but I love it... and I hardly notice any of those things. It took me like 2 weeks to learn to live with it, and after about a year... I have perfected it. The first 2 weeks I killed it at the top of the driveway, and it bucked in 6th gear on the way to work. Now... it never dies and it never bucks. I fixed my old habits.

Some people are cam ready... some people will learn to be okay with a big cam (with time)..... and some people just don't need a big cam. People that want their car to drive like stock are not going to enjoy a cam that has a lot of overlap.

i.e. Driving downhill in 6th gear at 70 MPH is from inexperience with a big cam....... go to 5th....... or to 75 MPH.......... or get 3.90 gears

[BlackM6RS/SS]

Yeah seems like the tune, I can cruise in 6th at 55mph just fine before with stock gears, 3rd and 4th have little surge but only when you only have the gas pressed like only 5% agian its not bad...but I dont have a G6X3, but is 231/236 112lsa....

[Ivan @ Southwest Speed]

It's all in the grind of the cam and the tune.

I've seen tuners nail the X3 to where you can easily ride at 1100 rpm. No problem.

Others murder it....bucking at 1900 rpm.

Yeah, some cams are just meant to stay up in the higher RPM ranges while others are not.

A street tune or some good data logging by the tuner will and should solve this.
Ivan

[dekan513]

this is why my installer and tuner talked me into the g5x3 , instead of the g6x3 , he showed me graphs on both and the g5 does better on the curve and g6 has more peak power , but the drivablity of the g5 is way better, he is a top notch tuner and ppl come from a long way for him to tune ls cars. almost everyone i talked to about the g6 says 1800 and below its not fun to drive and 6 gear is not worth going to now, i would recommend going with a 3.91 or so gear will help u out but wont fix ur problem. alot of ppl claim the g6x3 drivabilty is not a problem , but i bet they drive there cars hard and dont have slow streets and 15 mph zones either.

[Falundir]

Dekan513 - the under 15mph bit is something you get used to. Basically slow accelerate to 15mph then clutch in and coast til you need more speed and repeat. It's a trade off to have this cam.

[blkevrythng]

Originally Posted by Butcher

I don't think you understand what His problem is. He doesn't have a problem cruising at very low engine speeds (below 1300 RPM), He's having a problem above 1500 RPM. That is why it might not be tuning issue. I would be willing to bet that the MAF is showing erratic readings while cruising. If that is the case, then the MAF issue needs to be sorted out before it can be properly tuned.

Yeah, but is sooo effin cool

[blkevrythng]

I mean 1 or 2 scale, its cool to me

[dekan513]

i understand that but, i think the g5x3 is worth the drivibilty , im not trying to make a race car and if u ask the guys that have a g5 they will tell u its a great cam, u may lose 5 to 10 rwhp at peak but u gain it back in the curve which is more of what u want or should want . peak hp is at say 6200 rpm and u shift u going to almost drop out of ur power curve , this is were ive seen lots of ls3 and ls motors compare with the g5 and g6, the g5 is best of both worlds ,

bluecat is a top notch tuner in the ls world , does great stuff when i told him i was going to put a g6 in he said nothing , he just tuning it and my installer is a good friend of mine and he is the one that told me i need to talk to bluecat about the g6 , and after just a few mins i wanted the g5. the vette world loves the g5 aswell , those guys have been around much longer and know more about the ls3 and ls motors then the camaro world.
the g6x3 works great with a shorter gear.
but u can get use to anything tho its all about what u want, the g6x3 is a great cam, makes awesome power.

[Butcher]

Originally Posted by Bell040

He has had 2 tuners try to tune his car. One has 9 years experience.

My tuner warned me before I got a cam... he asked me to keep the LSA >114 degrees. I later figured out that he was actually trying to keep me at a conservative overlap by limiting the LSA.... so he would have a chance of getting it drivable. I trumped LSA with duration to get my lope (see my specs) which still ended up with +12° overlap (compared to -11 stock overlap)


Furthermore, I think some people feel surging more than others, and others have habits that make it worse. My wife thinks my car drives like crap (surges, bucks, dies, hunts for idle), but I love it... and I hardly notice any of those things. It took me like 2 weeks to learn to live with it, and after about a year... I have perfected it. The first 2 weeks I killed it at the top of the driveway, and it bucked in 6th gear on the way to work. Now... it never dies and it never bucks. I fixed my old habits.

Some people are cam ready... some people will learn to be okay with a big cam (with time)..... and some people just don't need a big cam. People that want their car to drive like stock are not going to enjoy a cam that has a lot of overlap.

i.e. Driving downhill in 6th gear at 70 MPH is from inexperience with a big cam.... go to 5th... or to 75 MPH.

I don't assume that 9 years of tuning means that they know everything.

I think you have it backwards. A lower LSA would be more radical, not a higher LSA.

It might be a tuning issue, but it might be more than that. That is why His tuner should log the car and find out exactly what the sensors are seeing. His tuner should eliminate any mechanical problems, and then His car can be properly tuned. There are more than a few people that have no problem with the G6X3. So clearly something is different with this car. As you said, He has been to two tuners. Neither one could fix His problem, so that makes me think there might be something wrong mechanically.

As for driveability, I have a cam in my '03 Z06 that makes the G6X3 look like a baby cam. It doesn't buck, surge, die out, or hunt for idle. EVER! Even when it's cold. It drives like a stock car. Now, I do have 3.90 gears in my car and that helps with slow speed driving. However, I went from a stock long block to a radical motor (both with 3.90 gears) and I didn't have to change my driving style at all.