ajcool2

iTrader: (43)

This may turn out to be a long post so sorry lol.

Test 1: Ram Air
So this is the second time weve tested this out. Last time we started with my GF's car(3.5 Auto 4th gen). Her first run off the highway was 14.3@96 (lowest trap ever). The weather was not the greatet either. So we decided to take out her headlight and run again. The next run was 14.1@98 and she eventually ran a 14.0@99. Then we tried it out on my brothers car (DEK Swap I/E/ECU) and he ran 14.9@93 with just the headlight out. Next we removed his JWT filter but left the velocity stack and ran a tube from the headlight to the intake and on his next run he ran 14.7@95. Yesterday we went back and tried it again with the same results. He ran 14.3@95 without the intake tube and with the tube he ran 14.3@99. It was wierd his ET didnt change though. My GF's car ran 13.76@101 which is her highest trap and fastest time with her exhaust connected and 17's on. I havent tried the tube on her car yet but hopefully we can pick up some MPH with it.

Test 2: 5th gen wheel size vs ET
This test was done on a auto 5th gen DEK. He was running Z AE's his first couple of runs and ended up with a 15.4 and 15.5 @92. He then switched front wheels with my brother who had 15 inch mazda millinia wheels and they fit perfectly to our suprise. He ran again and got a 15.3@92. This may be mostly due to the weight savings since those Z wheels are so heavy.

Test 3: Slick sizing
Ok this is more of a learning experience lol. So my brother borrowed some 16 inch M/T slick from our friend with a G35. He was running 14.3@99 2.2 60' with his 15 inch street tires. He mounted up the slicks with 20 psi and 15's in the back and ran constant 14.7@?? with the same 60's as the street tires. He got sick of them put the 15's back on and ran a few more 14.3's@99. So I'm concluding that the size of the slicks were not the best for his setup. I didnt even bother trying them on my girls car.

Conclusion
RAM AIR WORKS!! Jay_pee99, Aaron92SE and JIME all run them and I will be for now on lol.

15 inch Millinias will work on 5th gens.

Choose your slick sizes wisely!

SteveB123

iTrader: (2)

What is the air velocity through the intake tube?

NmexMAX

iTrader: (22)

By definition it might not be "ram air", but Aj's intent was that yes, this 'method' works.

Good job, sounds like a fund day at the track.

Damn, 4AT3.5 runnin' good times with massive room for improvement it seems like.

ajcool2

iTrader: (43)

Yup. She still has an exhaust leak at her test pipe that we need to fix and makes the car sound like **** lol. Tune, SSIM and slicks are next.

t6378tp

iTrader: (69)

for a auto I would get 22 or 23inch slicks and a 5-speed 23 or 24.5inch depending on your power level and rev limit

Nealoc187

iTrader: (23)

strange to me that he saw such a negative result from the slicks. any vids of the runs? was he bogging them or spinning them?


what was the actual size of the tire? were they the 26x10.5x16 ET Streets?

Gemner

iTrader: (4)

Im not too surprised, since he said the 60' was the same. after the launch, unless you have the power to spin the middle of a gear, slicks will only make you slower, not to mention they were on a bigger rim. sounds to me like the launch was inadequate on the slicks though, no reason you should ever have the same 60' on slicks as street tires

also, slicks at 20 psi? WTF? that is all kinds of incorrect

ajcool2

iTrader: (43)

They were 26x11.50x16in ET Streets. They were spinning off the line. I ran his car once and they didnt hook at all. I dropped the pressure down to 13psi with no luck.

Nealoc187

iTrader: (23)

no luck meaning no change in their behavior? still spinning?

ajcool2

iTrader: (43)

I told him to start at 20 and drop it each run to figure where it should be. Thats what he did and it didnt help at all. Also its an auto so we basically torqued it all the way up and lauched it as hard as we could thinking it would hook but it didnt.

ajcool2

iTrader: (43)

Yup.

Nealoc187

iTrader: (23)

He was spinning off the line and then bogging out, right? Not spinning the entire gear to redline?

ajcool2

iTrader: (43)

Right. Spinning then bogging. I dont know much tire sizing and all but I just think tire size was to big. Like t6378tp said we probably need something like a 22 inch slick for our autos.

Nealoc187

iTrader: (23)

definitely too big. I was just making sure I understood what was happening on the launch.

that tire size (diameter) is really too big for a 5spd, which of course has the ability to launch at any RPM it wants AND has the advantage of more aggressive gearing too. an auto that is limited to 2500rpm or whatever on the launch and has less aggressive gearing is just not going to be able to power that diameter of tire out of the hole and really get a good amount of acceleration from it.

not to mention that wide of a tire is just too much for a car with your brother's power. just too much rolling resistance on those wide tires for for his power.

I went to the track on 26x10.5" tires last year and the best I was able to pull off was consistent 13.3s @ 101-102 with 60's in the 1.86-1.92 range. The tires were just too tall for the power/weight ratio of my car. I went back a month or 2 later with 24.5" tires of the same width, and was able to pull consistent 1.6s and very low 1.7s an run 12.9s and 13.0s @ 103-104 all day. The biggest difference was the ability to get out of the hole better.

This sort of difference should be even more exaggerated with a car like your brother's (auto with worse gearing and low stall) - which is exactly what you saw. If he were to run a 22 or 23" tire I bet he would see way better times than with those huge tires he had on there.

Aaron92SE

iTrader: (128)

With my ram air intake setup, the engine runs very lean. So I have a specific map that I switch over on my UTEC in order to keep the same AFR. More than likely, your AFR is rich to begin with. Most every stock tune engine is. So you're probably ok.

streetzlegend

iTrader: (8)

I agree, 26 is way too big, i think even bigger than stock size tires. for n/a or even power even higher hp, 22's seem to be the best for auto's. I think jim did his 10sec run on 22's. Im sticking with 24.5 to try and prevent shifting into 4th, the 22's provide shorter gearing, better acceleration, etc.

ajcool2

iTrader: (43)

Nice thanks for the info. I've been reading Aaron and Jimes threads to see what type of tires they've been running so we'll probably go with the 22's.

ajcool2

iTrader: (43)

I never even thought to look at the wideband gauge to see if the A/F changed at all. I'll have to remember next time. I do know the 3.5 is in the high to mid 12 range.

ajcool2

iTrader: (43)

Cool well let me know how the 24.5 work out for you when you hit the track in 2014 lol.

jkpgt96

Looks like I will be trying this next time out..

Grand_hustle17

iTrader: (22)

me too... im not doing the tube.. ill remove the headlight though

Nealoc187

iTrader: (23)

haha

aic96max

iTrader: (12)

that was a good one lol

ajcool2

iTrader: (43)

Small update: Went back with the stock 15 inch sawblades and ran 13.71@102.2 2.19 60' with the 3.5. My brother found some 205/50/15 BF goodrich drag radials on CL for $100 and mounted them on his mellinias and ran 14.1@97 2.20 60'. Pretty sure thats a 3.0 auto record since 96sleeper ran 14.2.

aic96max

iTrader: (12)

good times Aj, getting faster. does the car spin when it shifts into 2nd alot or just a chirp?

looking at your times we have very similar runs and im trying to figure out what the diff can be associated to.
14.0 @ 102.3 w 2.221 60ft

could it be the weight? or the 2nd gear spin that i get? i wanted to go last night man, but i woke up at like 6:45 pm no way id make it out .

Aaron92SE

iTrader: (128)

I ran a 13.7@100.3mph in my 92 Maxima auto with the VE30DE 3.0L. But it's still a great time! I had a 1.99 60 foot too with 22" MT slicks. So, if he shaves 2 tenths off that 60 foot, then he'll shave 4 tenths off his ET and run 13.7. If he's chirping those tires off the line, then there's room for improvement. My slicks hooked perfectly. So I knew I was using every ounce of power I had. And that was with a 3K stall converter. Without that, the old VE auto wouldn't do anything better than a 2.2 60'. With my 23" BFG DRs, I still did 2.0s easily after a small burnout.

ajcool2

iTrader: (43)

Thanks man. The car doesnt spin or chirp second.

Im going to say weight, launch and your 2nd gear spinning. I think a few more trips and you'll be right where I am. We got there super late last night and only got 2 runs in. It was alot more cars than usual and they were running one lane for a while so it was kind of a fail night. I'll most likely take my Z next week and my girl will be driving her car with my bro's drag radials.

ajcool2

iTrader: (43)

Ahh yes I always forget about you 3rd gen guys. Oh well. I'll let him know he has a new time to beat lol. He still needs headers, pulley, and a tune. We'll probably be installing some 3.5 cams over the winter and finding some slicks.

t6378tp

iTrader: (69)

don't forget a 3k TC

I think with a tc, proper sized slicks and weight reduction will put him in the 13.7 range

Aaron92SE

iTrader: (128)

Yes. 13.7 is the NA 3L Auto record set by me. If he gets a 1.9 60 foot, he'll take that title! Don't underestimate how beneficial a high stall TC is. And the people that think you'll sacrifice streetability obviously do not have a high stall in their Maxima. A 3K Edge Racing Converter is very streetable and if you toss the keys to someone else and tell them to drive, they won't notice you have a higher stall. But romp on the gas from a standstill and the tires will spin MUCH easier on street tires. Put some 22-23" slicks on at the track and he'll be able to do 1.9s easily.

ajcool2

iTrader: (43)

Oh yeah forgot to add that. We were actually talking about it yesterday. I definatly dont think he'll be getting a 1.9 without it. We might get both of ours done at the same time. The stall in my Z is up to 3200 and it drives like stock. People told me it would feel alot different but it doesnt.

Aaron92SE

iTrader: (128)

I have a 3600 stall right now and it definitely drives a lot different for me. But it's still VERY streetable! If I had more power (nitrous), it would be a 4000 stall the way it sits now. But a 3000-3200 is hardly noticeable until you hit the gas.

I hope that 13.7 3L auto record gets smashed. I love to see others lay down some good track times!

t6378tp

iTrader: (69)

Oh the days of trying to run low 14's and high 13's the maxims I had sooooo much fun than.


Sometimes I want to just get another maxima and go back to those days or just make a track only car

Good luck with reaching your goals

Grand_hustle17

iTrader: (22)

congrats and congrats again... MD FTMFW!!!

aic96max

iTrader: (12)

O ok, thanks for the info, yeah def some of the weight but mostly 2nd gear spin for sure.. warm up the radials, i used to do a 2nd gear burnout with those back in the day. it hooked pretty good, blew the diff w those.