hey guys for some odd reason the .org is not letting me search, i have a Mevi and was wondering if it would be better if i went with a pathfinder throttle body? waht is the diameter difference between the 4th gen TB and the pathfinder TB? and will it bolt right up with the same components?
thanks guys

 

4th gen TB is 60mm an pathy TB is 70mm and you'll feel a difference. They don't bolt up togetter, so I suggest to pm stephenmax for a TB adaptor plate. I did it and it fit like eom, trust me.

edit: BTW, I found out that the 2001 Infiniti QX4 TB fit better, cause it is a bit smaller from the outside.

 

if you don't have mevi or 00vi, will you notice a difference with the larger throtttle body?

 

I dont see how you felt a difference.
Most dont. Even us boosted guys. Im sure it helps, but only in the upper RPMS where us boosted guys begin moving a lot of air.
I have my MEVI port matched to my PF TB and I still cant say theres noticable gains. I wouldnt even think theres much for an NA motor to gain from it at all.

 

The only difference an NA motor might notice is in throttle response, and even then only very slightly, especially because the VQ30 at least has pretty decent throttle response to begin with.

Oh, and for the record, the VQ30 throttlebody is 62mm, if i remember right from my measurements. So it's not even a 10mm increase, it's only 8mm, even less

 

Well, I'm 3.5, not mevi or boosted. But I can say that the VQ35 suck a with the 62 mm TB (thanks tatanko) of the 4th gen....

 

Never tried...

 

Hmm, I wouldnt have imagined that the 3.5 would suck in more air then a boosted vehicle but if you say so.

 

Probably not worth the time, effort nor the money ($300 or so) for an N/A motor. Im sure if you have everything else on an N/A motor then might as well.

I think its ALOT more benifitial for boosted guys

-matt

 

thanks alot for the input guys.. i made up my mind and i am not going to go that route...

 

No man, you got me wrong...
I mean , well I did'nt want to say it like this at first, but I runned my 3.5 swap with the 4th gen TB for a while and it was sucking ***!
How bad was it?
Well I managed to run 15.8 in 2006 (VQ30) and last summer, I could'nt do better than 15.7 (VQ35)... 62mm was simply too small for the VQ35.

 

Doesn't sound like the throttlebody is the problem. An 8mm smaller throttlebody isn't much of a restriction. Many V8's come from the factory with smaller throttlebodies than the 4th gen one, MUCH smaller (i.e. Dodge 5.9).

 

That wasn't the problem.

 

So can anyone tell me why I felt an improvement right of the bat, WITHOUT CHANGING ANYTHING ELSE?

edit: Before someone ask, no dyno yet.

 

Because you have a 3.5L maybe? Not only that, but remember :
Which I also agree on this.

Does that mean you have a back to back comparison re: different TB's? It's also hard to 'dyno' a change in throttle response.

 

Which is exactly why you can't prove and we can't refute any changes that throttlebody made to your car, more or less. Improved throttle response can give a false sense of additional power.

 

I'll dyno for my a/f ratio. I dont plan to dyno for tb's.
I tried 3 different tb's: 4th gen stock, 4th gen ported and 01 QX4.
Stock and ported feel mostly identical, but the QX4 was simply better.
A friend of mine, max99 on the npclub.com, did dyno the 3.5 with a 62mm TB and could'nt go over 198whp. With a 70mm A33 TB, he is now at +/-210whp.

Honestly I dont think the TB is responsible for an 12 hp increase by itself on a n/a VQ35. It's a bit costly to make it happen ($250.00) and certainly not a bang for the buck as the y-pipe is but, I think it's still a must to have.

BTW: Glad to share here and argue in a constructive manner. I dont mind to be told wrong when I am.

 

Did he custom fit the eGas? A33's do not have a 70mm TB, A33B's do, but it is electronic(hence the eGas comment )

Also, for all intents and purposes, our 'argument' is not really valid here since the OP most likely does not have a VQ35.

 

Sorry, I forgot the "B". No, he did'nt fit the egas.

 

So, he retrofitted it to be mechanical instead of electronic? Interesting. Did he use existing A32 hardware?

 

Bingo! Just like me... the old fashion swap

 

You're using a QX4 (Essentially an 01 Pathy), and your friend has modified his A33B piece? Which one is easier/cheaper & overall more efficient?

 

Well, I would say they are as good, but the pathy cost $250.00 with stephenmax adaptor plate. The maxima tb cost $0 if it come with the engine.
You only need to spend few bucks to modify it. The pathy's tps is plug and play with the engine wiring, so it is the easiest to me.

 

Seems like the thing to do for swap candidates. I've been looking at some Mustang pieces on eBay to retrofit my eThrottle for my 03 on. 75mm

 

You would...

 

You want to get rid of the egas?
75mm... sound promising!

 

No, can't get rid of it, but the servo motor on my unit looks fittable to that 'Stang unit.

A special someone brought it to my attention, so like anything else that is said, I will explore it until I turn green.

 

Dam* the all motor forum, dam*!

 

I'm actually working on an 82mm MAF adapter for my stock airbox. Berk's is a teency 70mm.