Contour Enthusiasts Group Archives Forums Branches South Central Dyno Guru's, please look over this Maxima dyno plot and give your opinions

Seeing that you guys have a bit more experience with high winding motors, I was wondering if you could take a look at this dyno plot for me and tell me if the extended useable rpm will help. What you are looking at is a JDM variable intake manifold installed on a 97 Maxima 5 speed. The US-spec manifold isn't variable and runs out of steam at 5500rpms. This manifold is taking power to 6500rpms. The odd thing is that the manifold doesn't gain any extra peak power, instead it just holds on to the power for a bit longer. The plot shows the difference between the butterflies engaged and closed thru the run.

Even though the manifold isn't gaining any more peak power, I think the car will be quicker because we can ride the power to redline and won't have to shift to 4th in the 1/4 mile. Let know what you think.

http://www.vanillaice.com/webmasters/hype/mrc/97%20Max%20dyno%20PR%20CAI%20Y-pipe%20VI.jpg

Dave

You actually will pick up some better times at the track if that is what your looking for. I am no expert on this, but I do have some personal experience with something similar. Back when the Contour had a superchip, KKM cold air induction, and custom exhaust I could pull to 7,500 with the chip. Although the dyno shows me falling on my face after 4,500 I believe I still could hold those gears. I had raced a silver 99 SVT who had exhaust and cold air induction. We were dead even first gear till he had to shift to 2nd. i pulled a good car on him. Then he was hanging with me till he hit third gear then I put two cars on him. Being able to hold gear longer helps out tremendously in my opinion.

Those graphs are like night & day different!

The graph that holds the peak HP through redline makes conderably more usable power.
Looks like an SVT HP graph.. :p

The manifold was tested at the track last night. The results were pretty impressive. On a 97 automatic with the same 60' with the intake operational, the Max dropped over .4 seconds and gained 4mph vs a run with the manifold inoperational!!!!!!!! The final 1/8 mile is where the manifold started to show it's stuff.

Looks like I'll have to get that manifold and smoke your arse 102mph trap speeds here I come Actually, I'd be happy with 100mph.

Dave

Dave that is very impressive. I figured it would help out but d@mn I didnt know that well. You should get that manifold. You would be lethal. As soon as we get some nice weather I am going to bring the Contour out to the track again and see if I can get a 13 second pass. This is my goal this year. So you better get this manifold.