Who had the Q45 Aluminum Driveshaft?

[rsiwicki]

I can't remember who had the Q45 Aluminum driveshaft....I think it was dgoodnoo but I can't find his posts about it. I was just curious to see if this would be feasible and reliable modification. I don't know about the strength of an aluminum vs. iron driveshaft. I am going to a specialty driveline shop within the next week that builds drag cars and specializes in lightweight driveshafts and I would like to know the benefit vs. negatives to using one and also how much should one cost....becuase for some reason I remember it was dgoodnoo and his cost was about $350....I could be wrong though.

[shadedoc]

lots of drive shaft info...http://www.nissaninfiniticlub....nding

[HeavyDuty]

Also here, I think AGM has one of these. Too rich for my blood when I need so many other things first. But wayyyy cool.

http://www.acpt.com/driveshaft/index.html

[AZ94Q]

Sounds sexy, heavyduty.. Although I was reading the old posts, and Q45tech said all the aftermarket ones he tried/installed never quite hit OEM quality.. Kinda scary..

[HeavyDuty]

I don't think I would want an aftermarket one piece aluminum made by Jethro on his lunch break either, but ACPT already has the dimensions & since they've made one, duplicating it is quick & dirty.

C'mon, you owned a MKIII & a MKIV & aren't comfortable with the ACPT stuff? Strong enough to propel the Titan Supra to a 9.0 @160 & drive the trash truck that emptied the dumpster at the track afterwards.

I'd do it in a second. Try this:

1) Hold your driveshaft over your head for 5 minutes.2) Hold a stick of bamboo, same position, same time.

"And for the 100 meter dash, gentlemen, you have your choice of Steel Toe boots or the helium filled Nike Air."

Some never depart from what they've always done......because it's what they've always done.

IIRC, Windsor Castle is over 5 centuries old, but has toilets.

Sorry, it's late, I'm getting silly. And no, AZ, I haven't been swashbuckling with the Captain.

[AZ94Q]

Heavy,

Q45tech always scares me

Can you explain what the major benefits of this mod would be? I'm always looking for an edge.. I just don't want to lose the OEM quality.. I admit these looks like major quality..

Q45tech said he tried a bunch of them out, aluminum etc etc, and none of them seemed to be as smooth... If this unit was OEM smoothness, with all the added benefits, I'm willing to order it..

[rsiwicki]

heavy....who did they make the Q driveshaft for? Also how muh mula $$ does this one cost? I can't find where they have the cost listed? The write up is impressive and your explanation makes sense. An reduciton in 5% of driveline loss is good as well.

I think dgoodno is using an aluminum driveshaft...and would like to hear his comments.

[AZ94Q]

If it's as smooth as OEM, with all those extra benefits.. I AM SOLD...

Please keep this discussion lively... We need all the extra performance possible..

[rsiwicki]

Az....Q45tech always scares the sh-t out of me as well. He was still busting my balls today on the Infiniti mechanic's forum about how the 4.08 will not reduce our 1/4 times and also how the 4.08 might be better suited for the 94-96 trannys versus the 90-93 trannys given the gears. I like a good friendly challenge and only numbers will determine who is more correct. To me the 1/4 time is good, but where do you have 99% of all your races -on the street - and almost none of these races are as long as the 1/4 mile...more like 1/8 miles street races and this is where all the bragging rights come into play...on the streets, not the 1/4 track. I can see myself getting beat next time on the street and then me trying to explain to the guy that in the 1/4 my car would beat him....yeah right like the guy would believe me and my girl would be like what heck you just got your butt whipped....that is when I guess I tell her that I can go the distance for her

Anyway...I am going to Moroso this weekend since my car will still be stock to do a few 1/4 times to see what I got so far and then I will do the 1/4 after everything is all done.

[AZ94Q]

Laugh out loud!! Couldn't agree more.. I still think the 4.08 will reduce 1/4 mile..

[AZ94Q]

Allow me to quote heavyduty.

"Two lengths is pretty impressive Qckser. I was talking to my tech last night & mentioned the third gear through the traps thing to him & he said: "HELLO! that means you're covering the same amount of ground quicker!" With my upcoming larger diameter, heavier wheels, and rear tire height to be determined, I'm going to need as much help as I can get. I'm still debating a 3.80 or 3.90, but after discussing it at length, it sounds like the 4.xx is going to be the way to go."

"HELLO! that means you're covering the same amount of ground quicker!"

Brilliant

[AZ94Q]

Allow me to quote 1qckser

"I have gone for a spin in a 92 with the gear change and it was really sweet, as a matter of fact his car had a good 2 car lenghts on me from a 1st gear roll to about 70 or so."

2 lengths

[rsiwicki]

I am with you there AZ on the 4.08. I have an appreciation for Q45techs comments but I am with you on this one and still believe that it will reduce my 1/4 time. Heck...the hitman is now smoking them all the way through intersections with his 4.08.....that is some serious power being layed down and if he had tires with a bigger contact patch he would definetly have to reduce the 1/4 times.

[AZ94Q]

The only way it could slow down the 1/4 mile, is by adding the shift.. Oh well, the level ten will help out in this matter.. I'll take the added shift.. I believe it will reduce 1/4 mile times on a stock transmission as well... My car is coming with the orig diff installed.. I will take it to the strip before I put the 4.08 on.. With your data and mine we should be able to settle it..

[rsiwicki]

sounds like a good plan...

[Q45tech]

That's what I said it adds a shift..........the 6900 rpm in 2nd is 94 mph.......or 98 mph at 7300 rpm with 3.538 and 26" tires.

The 94-96 lower ratio 2nd gear allows 96 mph in 2nd at 6900 rpm.

The shift time is 0.8 seconds and a 15.5% increase in rear torque [corrected for drive line loss = 12-13%] could increase acceleration by 0.5 second at best.

The gold standard is 97 at 14.8, I predict a less than 95 with a greater than 15.00 quarter with a 4.083 and stock transmission/engine of any year.

Find some sticky 205/50/15 [warning grossly overloaded at 1170 pounds] rear tires [23" vs 26"] and find out before you swap diffs........that would simulate a 3.95 diff ratio. Not perfect test but it would give you a general idea of what happens.

[HeavyDuty]

The shift time is 0.8 seconds and a 15.5% increase in rear torque [corrected for drive line loss = 12-13%] could increase acceleration by 0.5 second at best.

.5 second? I'd pimp out my Mom for .5 second.

I think AGM has the CF driveshaft. Cost was around $900-$1100 I believe.

When I first called, they said they'd do it, but hadn't done one. After AGM posted about his, I called back & they were able to dig up the specs and restated they could do it without having a core to measure, etc.

They were also willing to do a groupie, I think at 5 units (yes, I said unit) the price would drop to about $800.

I also see in an old thread wherre Q45Tech said he has tried them & did not like them. I doubt there are more manufacturers than ACPT, but I'm curious if that is who he tried before.

Benefits of reducing the rotating mass would be on the order of 11-12whp, or 5% flywheel gain, per Q45Tech.

AFAIK, the Supra guys like them, Z32 guys like them, F Body guys love them. I just couldn't justify twice the expense when I needed so much other stuff done first.

[AZ94Q]

I was talking to someone who used an ACPT driveshaft in his 3000gt vr4.. he said it was trully awesome..

I'm down to try this upgrade.

I think I will do this first.

The only thing I need is a level ten/supercharger or turbo/driveshaft. Luckily my car is equiped with everything else.

I think I will order this driveshaft when I get my car in may

[rsiwicki]

Don't forget about me....let me know about 2 weeks inadvance on the driveshaft. I think you and I are determined to get the most we can out of this car. We shall try to reset the limits...

[AZ94Q]

RSI,

You're my east coast counterpart, I won't forget about you

I guess flordia isnt that east, compared to Arizona it is

Ignore that last email I sent you, btw..

Keep me updated on your project, I am very interested in prototyping it!!