If anyone has a dyno coming up and wants to try out a modified cam table for one run, I'm cross-posting from Tuning subforum. The values generated in the table are only changed above ~6000rpm, and all values were the result of simulation, so it's not just random values. No gains could be simulated below that RPM, but above 6000 the simulated results continued to make power to 7500rpm.

I used the cam cards available from JWT, and the headflow results from the SG thread along with remaining common HR parameters. The simulation assumed no intake or exhaust bottlenecks.

Ideally, someone with all the bolt-ons would be the ideal test candidate. Intake tables were only slightly modified but didn't add much power when compared to the stock intake map, all major changes were from the exhaust table above 5000rpm. Stock intake table should generate similar numbers to the slightly modified intake table, so intake table doesn't matter, the power is in the new exhaust table.


Tuning thread

 

I will try it tonight or tomorrow.
I give you some feedback after.

 

in for results, I may have another dyno session coming up if you want to send it ill be happy to try it out

 

Changes have been highlighted. The important changes are in the last 3 columns, anything before that is strictly for smoothing purposes. Left two tables are stock, right two are modified. Considering the gains offered by CAIs above 6000RPM even with stock cam timing, I'm hypothesizing that gains might be attenuated with OEM air boxes.

 

So I tested your map ( Street Tuning) and I did see a plausible gain since my AFR went in average .2 leaner from 4000-6500 rpm then 6500-7500 remained relatively the same as my previous tune at dead on 13.1 AFR with the OEM sensor but 12.5 with the LC1 Wideband)

This is with my custom complete exhaust which is currently overkill for the stock HR engine but more toward the very aggressive JWT cams (C10)
Then my intake is just the stock box right now. Since my previous one does not fit anymore (big change under the hood)

Modified Momentum header ( Transition added )
Custom Y-Pipe with transition + megaphone to 3.5''
3.5'' Mid pipe & straight thru muffler.
OEM Intake Box

I hopes this help on your side.

 

Awesome. As I mentioned before, I suspect that the OEM intake boxes may be restrictive beyond ~6000ish RPM. While it's not a perfect deduction, based on the gains seen by Injen CAI on the HR above 6000RPM, but not much below, I think there's still some power to be made.

I got in contact with forum member Surratt, who has the 2009 Maxima FWD VQ, and he tuned his cam tables on the dyno. I ran his cam timing through simulation, and his dyno results and simulation results matched up almost perfectly.

It leads me to believe that the numbers in the table are "good enough" to use as a baseline for fine tuning. It seems as though there is a good cam timing, regardless of any inlet or outlet restrictions. So once it's right, you shouldn't have to mess with it again.

 

Interesting, i'll have to change my tables in my Cobb maps.

I don't have resolution at that high of a IPW though, my tables stop around 12ms but i've seen 15-16 at max rpms WOT.

 

I tried adding 6 to the 4 last row of 6800 and 10pts to the 7200 row (modified table)
My AFR went richer by .1-.2 ...
So no luck there.

Hopefully I can jump on my next intake project soon.

 

If you plan to build one, I'd suggest going with at least a 2.75in I.D. MAF housing. I've been toying with the idea, but that size housing is hard to come by. A 3.00in housing will probably need some mesh or honey comb to smooth out low speed flow.

 

my previous custom CAI was 3.5mm bigger at the MAF Tube with a bored TB at 62.5mm
The TB had the shaft cut in half and a knife edged butterfly.
The gain on the VHR for both items were around 15whp
The bored TB had a gain of 7-9whp proved at 2 different occasion Vs the oem TB both using the custom CAI.

My plan was to go with the 75mm TB from the Maxima 09+
The project was started over a year ago but was put on hold when I blew the engine in Aug 2012. Only half of the Intake manifold were completed.
So the Intake tubing will be some where around 3-3 1/2''

Way overkill for the stock HR , but good enough for the next cams/piston/rod setup

 

what are you using to simulate results?

 

Dyno2000.

It's pretty crude, but it's better than going by feels on the street.

There's definitely a lot missing, as far as intake and exhaust parameters, but the cam data is worthwhile.

It has provisions to use cam data at .050 lift, but you can't enter negative values for valve events, so it's pretty infuriating to try to do it that way.

 

Old post back from the dead.

Has anyone attempted the modified cam table with dyno results?