First off let me preface this by saying that I do think this modification will show gains. I have no proof nor will I supply proof of gains from dyno testing. So dont ask about gains because I really dont know.

IMHO gains will be more on boosted motors than NA motors. Boosted cars with MEVI should benefit even more.

Proflow Design is the company who does the modifications. The stock TB is 60mm they can bore it out to 63mm, a 5% increase. Last time I checked the cost was $190 plus shipping per unit. I guess we could get a quantity discount going, I have a call into them and will post the discount if any later. I have a core and so do another couple of members that are interested so we can work out a rotation so down time is minimal.

Please post if you are interested.

 

I was just thinking about this this morning. I would definitely be interested in this. Please take note of my e-mail address and keep me informed of any updates. Thanks

 

Interested, do you know how much they would charge or if they even do intake manifolds?

 

I have a better solution here http://webpages.charter.net/jeffjeske/64MM.html. Once I order the blade I was going to do this to my extra TB for my se-r. ON the dyno there isn't really any power gain but the throttle response was alot better. I had upgraded to a factory 60mm TB on my 87 maxima and it made a huge difference in engine response during part throttle. All you would have to do is get an extra TB, have it bored to match the width of the new throttle plate. Here are the results showing the effects of the 64mm TB on their cars:
http://www.probetalk.com/forums/show...tle+body+plate

 

HFS! I just called them this afternoon. no wonder no one called me back..

 

Brett, did you get your VI back yet?

 

s/b here this week... i took some pics before i sent it like we discussed. gimme an email addy for BIG pics.

 

we can get a good price for 5 t/b's with cores... email matt or myself for details.

 

Brett, I talked to Jim for a while last night. I asked him if their was any way to go larger than ~63mm. He said he has two ways to do this. One way us to use titanium puddy and build up the thin areas of the TB them bore it out more, this could net only a few more mm. The next project would involve converting to a non Maxima TB, like a 70mm unit for a Mustang. I took some pictures with measurments and e-mailed them to him last night. Cost for the 70mm TB will be much more expensive but should also net bigger gains for us boosted VQ's

 

My OE TB is bypassed so I dont use that switch anyways.

 

For $190 + shipping... at +10% increase in Surface Area (2827mm2 vs 3117mm2)isn't a bad investment... I'm only concerned about uneven idling.

 

I am in. please keep me updated with emails or PM's.. oh and much thanks to Mardi!!

 

Q45 throttle body anyone? It is 70mm and all one has to do is check the TB gasket to see if it matches the bolt pattern of the VQ. If it does match, you can a spare TB at the junkyard or order a new one.

 

nice!

Now to contact DAVEB

 

Yeah I always wondered about that I heard something a long time ago someone was talking about it.. maybe I am mistaken

 

I went to my local Infinity dealer this morning and talked to the parts guy, they had a spare Q45 TB off a broken 94' that he just gave to me. I have done some comparissons and it looks way to big for our intake and the bolt holes arent even close. I think its ~77mm!!! I'm gonna keep it to see if I can maybe some how make it work but it looks like allot of work.

I was looking at the Nissan motor matrix on FreshAlloy and noticed the 1996 to 2000 Pathfinder had a VG33E. Perhaps a 3.3L TB might fit and should be a bit larger because of the 3.3L displacement. I'll swing by my Nissan dealer to take a look at the gasket tonight. If any of you guys know someone that has a 96-00 Pathfinder can you please take a few digital pics of the TB and post them or e-mail them to me? Close ups of the linkage and harness connectors would be great! Thanks!

 

Ha!

I remember when ebmorgan once brought this whole idea up, (using another TB) and everyone told him he was an idiot.

IanS

 

Yup the crowd around here usually will slam ya if they dont think you can do it.

 

Were you still going to do a GD on this?
Thanks

 

In my opinion, 63mm is not really enough to warrant the expense. That size amounts to only a 10% cross-sectional area increase over stock. }Since 4th gens respond well to mods and can easily net a 30 crank HP increase over stock (16% increase), and that equates to approximately a 16% air flow increase over stock, you'd ideally want a 65mm throttle body to match the increased flow capability. A 65mm TB would equate to a 17% c/s area increase.

I just think if you're going to poop down $200 for a throttle body, you should get the optimal size. I personally would pay $250-300 if Proflow could figure out how to bore the dang ol' thangs to 65mm.

 

Ummm, I dont know if you guys saw this post of mine or not, but I have a 70mm TB installed and ported the intake port to ~67mm by hand.

http://forums.maxima.org/showthread.php?threadid=141403

 

Yes I saw that post. Are you still moving to DC? maybe if you do you could do this for me??

 

DC, yup! If you can wait till next year or so, I'm gonna be vary busy for the first few months I'm their.

 

Yeah sure that will be cool.. maybe I can get a ride in a real max..w/ lots o' boost. Thats my next project by the way, after the VI. So where are you going to live?

 

Anne Arundel or Northern Calvert County in MD.

My office is near where 50 meets 495 on the east side of DC in Landover MD. I dont want to commute too far, 45min max.

 

Yeah, I read that post. Do you have any feedback on the 70mm unit? Any impressions as far as power gains, what rpms the gains or losses were achieved?

 

Ive got a dyno appointment on Sept 9th so we shall see. As far as seat of the pants goes, its not very noticable, but the dyno will tell for sure.

 

Oh thats VERY good news.. if you wanna do something when you get in town we can meet up and get some drinks or something. Send me an email or PM.

Jason

 

Yeah D.C. is a great place for maximas. We'll have to have a meet when your free.