Okay Area, enlighten me. Not quite sure how I would accomplish that...

 

lobe seperation angle.

stock lsj cams have an lsa of 112.5 the hks grind has 110. not sure what the jbp cams are. the more you widen this up {to a degree} the more the cylinder pressure is increased. the more air is being crammed into the cylinder. tightening up the lsa {going smaller} will reduce cylinder pressures.

increasing cylinder pressure isn't going to always increase the power. sometimes there is an adverse effect to both sides of it. going to wide, or going to small.

you get to a point where cramming more air into the motor isn't going to help anything. you have to make it more efficient. case in point m-dubs car. this is a prime example of over filling and under exhausting

 

EDIT: DUH...

And how did you figure out that a 112-114 LSA is optimal for this head?

Also, if the head is ported (especially on the exhaust ports), would that effect the ability to raise cylinder pressure and still benefit from it?

 

So do you think this Dyno is running high also? My mods are ZZP 3" Downpipe with no Cat, Magna-flow Catback exhaust and K&N Typhoon CAI. Oh yea, my windows are tinted which counts for 5 hps? lol

 

Yup, deff. found the limits of the 2.5" system... Oh, well tax returns are around the corner getting full 3" and possibly a header!

Squish did you ever call that d00d on the H/E brackets, fur' me?

 

Actually, looks like you're getting a little rich there at some points. You may benefit from further tuning. I can't tell completly, but it looks like you're dipping into the 10's once or twice...

 

Damn near it anyways... I'm sure some further tuning could release the potential of the car!

 

im working with him on a schedule time that i can get my car over there and he can take measurements of it.

optimal on lsa is more or less up to the end user, and what they are doing with the car.

 

yea, thats what I have been told. I havent had any tuning done to it yet. I was gonna wait til I got the headers and Stage 2 put on.

 

Thats still on GM Stg2 tune... well that explains the rich dips!

 

From what he said, that's before the header and stage II. Which then makes his #'s seem a little high to me...

 

I am still new to this whole modding and tuning stuff so this thread has had a lot of good info. I was just curious to see if you guys thought that 246hps was a lot for my mods or if it is about average.

 

It's a lot for 3" catless DP, 2.5" exhaust and an intake...

 

That is correct. No Stage II yet. Just Induction mods. I have heard that removing your CAT gives a good boost in Horsepower but I have no idea how much of one.

 

OH, holy ****! Yeah that is damn high for not even Stage 2 stuff? Might be another Dyno Shop padding numbers making numbers look better!

 

Another question, the numbers on the Dyno sheet as far as Max Power, is that to the Crank?

 

No, whp.

 

oh... Then I agree that my numbers are high. I thought it was to the crank and then you subract 10% or whatever the formula is. Shows what I know!

 

Yeah dyno's show WHP... hmmm! I'm kinda at a loss. Area,Witt, 06black need to step in they are the tuner GODS around here!

But that does seem high... Especially at the stock pulley

 

It means the dyno operator needs to learn how to calibrate his machine or stop fudging the #'s...

 

That seems to be a problem around lately! I know one of the dyno's Area and I go to is a "hearbreaker" the shop owner even says that... I just say it's only calibrated for Hondas The other seems to be a lot higher but its also newer and has better air flow so I don't know!

I know unless you go to the same dynos each time you'll get different numbers from every one of them!

 

Well appreciate the info guys. Not sure if I should go back to that one though unless I want to see the HP gain from each mod.

 

Or just ask around... see which dyno's seem to be a little more accurate!

 

That's the only real reason to go to a dyno anyways. Real performance gains are proven at a track, whether you like to turn or floor it, every state's got a track for you to test what you've really done...

 

Track and street performance is where you will see your true gains.