My low ass H/C dyno
My low *** H/C dyno Well the butt dyno feels better than what the real dyno says....... Here is what is going on. Weiand intake, TB, Pulley, Dynatec LTs, !A/C, 228/232 .580/ 114+4 cam, My 5.3 heads that flow around 285/210. Dyno was at Fastech and pulls were to 6K. They scaled it in MPH and I asked Todd to email in RPM if they can. A/F stayed around 12.1:1 to 6K. Also it was reading false knock at 25* and retarding to 23*. The graph is smooth though, but looks like it peaked around 5800(kinda early). I am just trying to see what variables are keeping me to 403/379 peak. THAT SUCKS! The intake was ported before I got it, and pretty wide I may add. I had to open the intake runners by around .18 to clear with no turb. and tapered in about 3 inches each side. Car was driven for a while this morning before the dyno......heatsoak from the intake helping cause lower power and false knock? Compression is great and car only has 46K on the odo. WTF WTF WTF. I am thinking about pulling off the intake and throwing it in the garbage for an LS6. What do you think?
Brandon
Brandon
Originally Posted by 383ss
get it tuned. your A/F is fat and you need to get rid of the false knock.
Brandon
As said before, the a/f is fat... my car on the jug has an a/f similar to that. Is your car throwing a PO327 code? That is for low knock sensor voltage. I fought 3* - 5* of false knock for months and traced it back to that. I ended up replacing the KS harness and the sensors to solve the issue. W/O false knock and my a/f straightened out, my car made 24.5 more peak HP, and tons under the curve, at the tires and felt much better SOTP.
I don't think your #'s are bad at all, get rid of the false knock and lean it out some, there should be another 15-20 RW hiding.
I don't think your #'s are bad at all, get rid of the false knock and lean it out some, there should be another 15-20 RW hiding.
I hear you on the knock issue. Its just way off what I was expecting. Unless I can dig ATLEAST 20rw out of the thing, I am going to first throw that intake in the trash(which I might do anyways). Hopefully I can get it tuned by this weekend and get a few pulls back at LG where I did my original baseline. I want to compare the numbers to my cam only numbers on the same dyno. I really dont dig the fact its peaking at 6K either. I am starting to think this cam doesnt match the cam card, seriously. If I hadnt just put it back together I would go ahead and put an X4 in the sucker and see what then. Just dont want to **** away $225 for the gaskets, bolts etc(flycut). I also searched and really couldnt find any H/C #'s with the weiand intake. I really think that the intake air temp. of 94(sensor verified) and my hunk of aluminum intake are playing a role. Thanks for the feedback.
Brandon
Brandon
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Originally Posted by BlueSix
A/F is too fat, get rid of the false knock, you aren't revving the car high enough, and you need a real intake.
Brandon
Originally Posted by M6HuggerSS
sounds like you need a good tune! and ditch that over weight, heat soaked POS intake and just get the LS6.
then id guess youll see around 415-420rwhp.
good luck!
then id guess youll see around 415-420rwhp.
good luck!
Brandon
Originally Posted by BlueSix
the cam could very well be what you claim it is....it may not be installed properly though...who did the install?
Brandon
let me get this straight you have a H/C set up and it is NOT tuned and your running way rich and getting quite a bit of knock and and not spinning the motor past 6k rpm your pissed???
GET THE CAR TUNED!!! properly
then see what is going on
and get rid of that intake
GET THE CAR TUNED!!! properly
then see what is going on
and get rid of that intake
Originally Posted by thechef
let me get this straight you have a H/C set up and it is NOT tuned and your running way rich and getting quite a bit of knock and and not spinning the motor past 6k rpm your pissed???
GET THE CAR TUNED!!! properly
then see what is going on
and get rid of that intake
GET THE CAR TUNED!!! properly
then see what is going on
and get rid of that intake
Brandon