Dave B

I cruised out to the track with my F-Body friends today to test out my Poorman's CAI. Conditions according to my friends mobile weather station:

1157' above sea level
29.98 baro pressure
50 degrees
15mph HEAD WIND!!! with 25mph gusts!!!!

I'm happy to say I was the only 4-door import racing. No mods have been added since last time except my Konis, KYBs, and Poorman's CAI. My prior best was a 14.91@94.11mph with a 2.389 60 foot (with the HKS intake). My new best today:

2.285 60 foot
9.570@74.16 1/8th
14.81@93.58mph 1/4
For fun, et corrected for altitude: 14.64@95mph

I ran 2 14.8s, 2 14.9s, and 1 15.1 with 60 foots in the high 2.2 range to high 2.3 range. What REALLY makes me happy is the fact that strong head wind was probably a factor after 80mph and might be slowing me down a little in both et and trap speed. My best et was against a 95 Z28 that ran a 14.6@95mph vs my 14.8@94mph. Needless to say, I was on his bumper the whole length of the track which freaked out my F-Body friends and the Z28 driver wouldn't give me the time of day after the race. I couldn't count how many Mustangs I saw run in the mid 15s. 2 EBP Civic Si's with mods were running 15.9-16.0@87mph, Dakota R/T running 15.3@88mph, and GS-T with free mods running 15.0@95mph. Fastest F-Body was my buddies 98 Firebird running 12.2@112mph (usually runs 11.8s..gulp).

As you can see, the results are showing the Poorman's CAI producing the same power as the POP setup and possibly the PR CAI. The dyno results also prove the same thing. The only I was doing differently was shifting the 2-3 and 3-4 at an indicated 6100rpms. My 14.8s were done with 3rd gear. When I shifted to 4th, my car slowed down and ran 14.9s. Next time I go out I will shift to 4th IF the headwind isn't so strong.


Dave


[Edited by Dave B on 03-04-2001 at 06:26 PM]

mAdD MAX

That's pretty damn good!!

Do you know how much of an increase this CAI would give to a completely stock Max (a la my Max).

Just as an aside, how did someone else get 14.3 on a Max with only intake/exhaust mods while you guys get 14.8? I'm just curious?

And do the Z28 F-Bodys have V8s or V6s?

Nismo87SE

Also when you run the 1/4 do you leave the car in 3rd or hit 4th? I only wish I was able to do the same mod to my stock air box but it wouldn't work. Its true you might have more power from 5500rpm+ with your CAI, but the PR CAI will have more midrange torque. BTW what are your next plans to get lower ET's?

Dave B

The guys that have run 14.3s in 4th and 5th gen Maxima's is Jeff K (4th gen) and MaddMax (5th gen). Both drivers run on sea level or below sea level tracks and the conditions are typically better where they live (high barometric pressure, good tracks). They also are pulling 2.1 60 foots. For every tenth you shed off your 60 foot, you'll see a loss of .15 to .2 in et.

Nismo87SE-
My future mods is the S-AFC and possibly drag radials. I don't think I 'll run a power adder because I don't see the point in paying $4000 for a SC and install to run mid 13s. If I can get into the mid 14s, I'll be very happy.


Dave

[Edited by Dave B on 03-04-2001 at 06:33 PM]

Sprint

iTrader: (10)

Not to take anything away from you custom CAI, but looking at your 60' it appears that your drag ability is up also.. looks like you are ither getting less wheel hop or you are toying the clutch much better

Confused

iTrader: (4)

.

ericdwong

Hmmm, very interesting indeed. Dave, at what RPM do you launch? Did you run with a full tank of gas, spare tire, etc? Also, have you plugged up the stock airbox and the duct that goes out to the front of the car? I am hoping that I will be able to achieve similar results. The track I race at is near sea level. My last time out, I ran 15.1 @ 92.33 MPH, with alot of wheel hop, and that imfamous 2 15" woofer box in the trunk. Hopefully, by the time I go out to the track next time, I will have my new project done which is a lightweight replacement to my tremendously heavy box I have right now. That and so I can access my spare tire.

ohboiya

iTrader: (3)

RussMaxManiac

Why do u shift at 6100?

UMD_MaxSE

iTrader: (1)

Do a search for OSCAI on the 5th gen forum for pics.

Dave B

My technique to launch didn't really change, it's the fact that I'm actually running tires that have tread vs my bald RSA 15s from last season. I'm still getting quite bit of wheelspin in 1st with a little hop right off the line and then a hearty chirp into 2nd. I'm launching at 2800rpms with a really quick slip. On my 14.8s, the car fell right into 3000rpms right off the line and I just punched it and hoped for the best. Like I said, I think there's still some et to be dropped and some mph to be gained when I don't have a 15mph headwind starring me in the face.

All in all, my goal was just to show that a modified stock airbox is nearly efficent as a aftermarket intake. I think I've shown this in my dyno and timeslips.


Dave

Dave B

Russ-

I shift at 6500 on the 1-2, 6100 on the 2-3, and I hold 3rd which is about 6300 when I'm crossing the line. The reason I shift at 6100 is because my peak hp occurs at 5500 rpms. There is no point is winding it out to 6500 because I'm only making 149 fwhp at 6100 and the power plumments after that. I tried shifting to 4th at 6100 and my times and trap speeds actually got worse. I shift at 6500 on the 1-2 because the car zips thru 1st so quickly and I want land in a deeper part of 2nd. Holding off the shift on 2-3 actually makes you slower because your car is laboring too long in the gear.


Dave

Nismo87SE

Are you able to scan and post your dyno chart? Thats one hell of a power drop going from 5500-6100rpm. I noticed the same things in my se-r too, if I shifted to 4th I lost trapspeed and some ET. Once I isntalled my shift light I found out my tach was reading 500-600rpm more. On the dyno my car only lost like 4-5hp from the peak at 6400 at 7000rpm. BTW how did the SVT guys react to your max putting down more torque than one of their supercharged cars . If your still getting wheel hop you should try to fill the engine mounts. Or you can try getting some of those spring blockers and cut it up to fit the gap in the stock mounts. This should keep the extra vibration down and take away the wheel hop.

Bryan H

good job davey

i think the fact the track was way to cold and their leglet of using VHT to its fullest extent hampered my times as well
but im happy with what it did.

now, get a slightly warmer day, less wind, and more vht and see what your best does

get used to the track again, and you'll be eating lt1's in no time

heheheh
:O

Dave B

I forgot to mention our boy Bryan H was there in his GSX. At first, he was stuck in the low to mid 14s @95mph (he has a bent valve). Then he changed out his blow off valve and cranked out a 13.5@105mph. This time was also done shifting about 1000 rpms before power peak (right Bryan?). It was awesome to watch his car launch. Everytime he went, he was spinning all 4 tires and still getting 1.9 60 foots. Everyone said the track was really slick, but somehow I pulled off my best 60 foots.

Nismo87SE-
I think the only way a VQ will make power above 5500 rpms is by the use of a SC, NOS, or a new intake manifold. The reason the power pluments so fast is the long runner design of the VQ. As you and I know, long runners make strong low to midrange power, but rather weak topend power. The 5th gen has both short and long runners which gives it about 1000 rpms more to work with. My car makes peak power at 5500 rpms (~175 fwhp) and holds on and makes about 165 fwhp till 6000. After that it drops really quickly. After installing my shiftlight, I noticed that the tach is off by 200-300 rpms. I've got my light setup to go off at 5900 (6100 indicated by the tach). By the time I make the shift, my motor is at 6100 rpms. All I've done to my engine mounts is do the "rubber hose mod". I've got spring blockers, but I didn't use them yesterday. I'll use them next time. The good news is my clutch is still holding up really strong and has yep to slip...ever.


Dave

NightRider

iTrader: (6)

Actually The person that ran the 14.3, just has a generic cone filter and he also got exactly 200hp on the dyno. He drives a 2000 Max SE 5-speed.

NightRider

iTrader: (6)

Actually, you'll find that the fuel will get extremely lean at about 5000rpms all the way up to redline. Your S- AFC will correct that by adding more fuel from 5000 rpm on up. This will result in steady power all the way up to redline.

gLok

I find it funny how many guys turn quiet after getting schooled by a "family sedan" at the track.

Most guys i beat have faster cars yet cant drive as well. So i win and they either turn off and leave or dont give me the time of day after i beat them. I dunno why they feel so bad, i dont feel bad when someone beats me. Its usually domestic v8 owners too.

Bryan H

davey. i think its just the turbo seal went belly up on me
im havnig no problems what so ever out of the car now
can't figure it out

i went 13.5 @ 100 with a 1.99 60ft
with 13-14 lbs


woohoo
12's here i come
now if the weather gets warmer, that will only tell in time
=o(

Paul6speed

Check out my page for pics of one.

ohboiya

iTrader: (3)

but is this only 4 automatics? That little hood scoop or whatever it is that u guys have on your web sites ... I don't have that on my 5 speed ... I've only seen them on the autos ....

UMD_MaxSE

iTrader: (1)

As far as I know, all 4th gen and 5th gen maximas have the air scoop intake setup regardless of stick or auto trans. Check over the radiator towards the drivers side. It should be there.

Paul6speed

Actually the 2nd inlet is no longer available on new Maximas. I think Nissan got rid of the air silencer late 2000. 2001 for sure. It has nothing to do with the transmission type.

[QUOTE]Originally posted by ohboiya
[I]but is this only 4 automatics? That little hood scoop or whatever it is that u guys have on your web sites ... I don't have that on my 5 speed ... I've only seen them on the autos ....


[QUOTE]

pjung_hej

Dave,

I saw an article from Compact Sports Car(if I remember correctly...) last week, on a comparison between several aftermarket drop-on and cone (pop) filters. The test car was an 1989 BMW 325i. K&N drop-on and pop filters were tested, along with some other brands that I haven't heard of. Not surprisingly, K&N filters pretty much have the best results. What I found interesting was the fact that not all pop intakes perform the same. Matter of fact, the difference was about 8.5 HP gain(at the flywheel) from the K&N pop intake vs. 4HP on the poorest performer, which I thing is rather significant. The factors were basically filter material as well as shape of the pop intake that affect the airflow. So my question is if you know whether the HKS intake perform as well as Stillen and PR CAI due to its shape and filter material. Personally I think the previously two have more surface area which allows more air to be filtered then the HKS, and the material is probably slightly better. This is just a thought that maybe OSCAI might not perform better than those mentioned two intakes? What do you think?

-Philip

95greense

when i switched from the stillen to the oscai there was almost no difference in my times. 16.660 stillen to 16.659 oscai. but then again i still had the stock resonator between the MAS and the throttle body. i'll have to try it again when i get mzmtg's pipe and replace the vacuum hose with pvc. but even if there wasn't a real gain over the stillen, the fact that i didn't lose anything and having the car be a little quieter was nice.

pjung_hej

That's really nice, I agree. The reason why I asked was because I used to have a Stillen intake. Just "half" finished with the OSCAI right now, still have the stock filter and haven't attached a hose yet but removed the resonator box. But having made the car so quite again was really nice. I drove my sister's 330i and my car now actually sounds similar to it when doing full throttle! Just curious, what is the reason that many of you think the resonator between the MAS and throttle body is restrictive? I looked at the inside of it and it's wide open and there was nothing in between that could affect the airflow. Is it really worth the hassle to replace it?

Dave B

I was under the impression that a foam filter will outflow a cotton filter, but at the expense filtering capabilities. I'm pretty sure a HKS would flow as good as the POP, but I never tested it. The Poorman's gains won't be fully realized on the dyno because there is little air being pumped in. At a roll there air coming in over the radiator and under the nose. The stock airbox becomes pressurized and greatly improves tip-in throttle and probably adds hp. We'll what she does next time when the headwind isn't so strong.


Dave

mzmtg

iTrader: (11)

My theory on this matter:

Yes the stock intake is fairly open in there. But it doesnt provide very smooth flow. All those flex connectors and boxes rerally muck up the flow. Plus the slightly smaller diameter of my pipe preserves charge velocity to minimize loss of low end torque.

95greense

get my check yet mzmtg? just wonderin.

ZuMBLe

iTrader: (1)

Dude, you taking orders for those pipes yet?

ZuM

mzmtg

iTrader: (11)

Yes, I'm taking orders.

No I havent gotten any checks yet...

Pipes for those who already contacted me are ready to go.

pjung_hej

Are you making the pipe that goes in between the MAS and throttle body? If so can you tell me more about it? Thanks.

mzmtg

iTrader: (11)

hit the link in my sig for the info and pics...

95greense

damn online banking! the check request was already made and should be on it's way mzmtg. make mine extra special

mzmtg

iTrader: (11)

I'll add a little slice of love...