I currently have an ls/vtec setup that has been built. Here are the mods
Block:
bored .3 over
stock crank
RS machines pistons
Stock ls rods w/ arp rod bolts
slightly decked

Head:
B16 head
p&p
3 angle valve job
slightly milled
Skunk pro 1 cams
Skunk pro springs and retainers
Aem Cam gears
stock valves


Intake:
3" piping sri with bpi flow stack with k&n filter
68mm skunk tb
portmatched skunk pro intake manifold

Exhaust:
Hytech replica header
2.5" test pipe
Apex'i World Sport 2 exhaust

I was hoping to hit 200whp with this setup and i was disappointed when i took it for a tune and got it on the dyno. Its tuned on eCtune. It put out 188whp/127lb.
I have seen similar setups that have put out over 200 and a lot more torque. The compression numbers read 260 across the board. I was wondering if the cams could be a problem. I kno they are pretty aggressive but ive seen people use them on similar block setups and have made great power. Ideas?



Modified by 98NAIntegra at 7:51 AM 9/17/2008

 

First thing i can think of would be to take it to the track and run it to see what it runs. Compare it to what other set ups are running with more power etc. Also for anyone to give you any type of decent advice, you have to post your dyno and air fuel chart......i could say your number 3 rod has a big nasty hole in it which is causing your loss of power......theres nothing for us to go by besides your set up and thats not helping without any type of diagnostics ie: dyno sheet.

ninja edit: could be a bad tune for all anyone knows....you gotta run it though because the dyno might read lower then the ones everyone else uses to tune their cars.

 

http://bbmoto.net/wiki/index.p...atter

 

^^^^ Good shizzz

 

Was the head flow benched? were the cams degree'd to get the correct centerlines? Did they adjust the cams during the tune?

 

no the rod doesnt have a hole in it or anything like that. I will post up a dyno sheet soon. It was tuned by a very very reputable person that im sure you all kno so that isnt an issue. The head was flow benched. The cams actually werent degreed in using a degree fixture. I always thought that could be a problem. We did mess with the cams during the tune but nothing too serious because the tuner did not kno the clearance specs so we wanted to be safe. Since the dyno, i have put on a cutout on the exhaust that im hoping will bump the power up more than when it was going thru that ws2.

 

What were the flow bench results? How do your numbers compare with similar builds tuned by this person? Did you use the quick set numbers for an initial setting of the cams?

 

Numbers sound right to me. Just because it looks like 200whp on paper,well,,dosent mean 200 on the rollers.As long as it runs well id be happy. Were the gears tuned as well?

 

What is a stock b16 flow bench result? i cant remember off the top of my head but i could tell you if i knew the stock number. I would assume the cams are on the quick set numbers but am not positive. I can ask the builder and see. Once again, yes the gears were tuned but to a limit because we didnt kno the clearance specs. i believe its at 3ex 2in.

 

nice link =]

 

Honda-Tech All Motor forum - cuz if you don't make 200, you aint ****.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by clean rice &raquo;</TD></TR><TR><TD CLASS="quote">Honda-Tech All Motor forum - cuz if you don't make 200, you aint ****.</TD></TR></TABLE>

lol, its all bout da numbers y0

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 98vtec &raquo;</TD></TR><TR><TD CLASS="quote">http://bbmoto.net/wiki/index.p...atter</TD></TR></TABLE>

The dyno used reads a bit tight, but that doesn't change the fact that the car is a lot slower than it should be.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 98vtec &raquo;</TD></TR><TR><TD CLASS="quote">http://bbmoto.net/wiki/index.p...atter</TD></TR></TABLE>

EPIC
more people need to listen to those people

 

ok so i havent looked at the chart in a while but it actually made 187whp and 125lb. Now that i look at it again, its not so pretty.

 

not all dynos have the same number everyone dyno has a different run to the track and see what ur running

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 98NAIntegra &raquo;</TD></TR><TR><TD CLASS="quote">ok so i havent looked at the chart in a while but it actually made 187whp and 125lb. Now that i look at it again, its not so pretty.

</TD></TR></TABLE>

looks too lean to me.

notice at 6800 you get an even leaner spot and the engine loses power then regains a little power after a richer mixture then loses power again after the same lean mixture.

Did Vega tune this?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by BMo Tuning &raquo;</TD></TR><TR><TD CLASS="quote">

lol, its all bout da numbers y0</TD></TR></TABLE>
stfu, if you aint running 13.4CR you aint shat. Lmao remember that thread??

13+ club and we aint talking bout no 13 seconds neither boss.


blakes right, Richen that car up , i bet it makes mid 190s with just a different tune.. lol that's gotta be 13.8's 13.9's at WOT thats retardedd

 

the only reason i could see it being like that is the AFR reading coming from a sniffer and the tuner using a separate wideband in the exhaust but that would not explain the dip in power at the two lean "spikes"

 

yes vega tuned it. I did think the graph could have been a little smoother rather than spikey like that. 13.8's or 13.9's at WOT thats retardeddd, why is that retarded? besides that its slow, lol.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 98NAIntegra &raquo;</TD></TR><TR><TD CLASS="quote">yes vega tuned it. I did think the graph could have been a little smoother rather than spikey like that. 13.8's or 13.9's at WOT thats retardeddd, why is that retarded? besides that its slow, lol.</TD></TR></TABLE>

I think he was saying that the A/F ratio was at 13.9:1 at WOT in fact it looks to go over 14 at 6800

 

It really depends on where the A/F was taken. I've seen 0.5 difference between the collector reading and tail pipe reading.

If I were the OP, I would try a stg1 cam. I've had some success with just a Blox A. See my plot below.



Too often, people go with big lobe cams that just don't work well with the rest of the engine.

 

i see. Yeah i kno he tunes also to get good gas mileage. I still only get 23ish mpg. So would making the tune richer help the power out and perhaps smoothen it out? are we talking about 13.5 or even more?

 

So many use the pro 1s on their build that is pretty much exactly like mine and have great success. I was thinking if perhaps a greater displacement would make the cams come more alive. The tuner did have a wideband on the header collector hooked up to his gauge and stuff but there was also a reader at the exhaust tip.

 

that is something you will need to ask John. his SN here is 'mtber" if you would like him to chime in.

I know that he typically has his own wideband so i dunno.

when you tune for gas mileage, you do that on the street and not necessarily on a dyno. Its damn near impossible to simulate the street on a dyno even if you have a load bearing one.

WOT has nothing to do with tuning for MPG.