More hp from my Q45t !

[moush1]

Looking for the most economical and reasonable methods to squeeze some more power out of my Q45.

[911/Q45]

Do all the preventative maintenance required to make it run like new and you'll have virtually all the power available. Search this site for exactly what that is and I'm sure you'll find enough to keep you busy.

[Q45tech]

With the new lower restriction intake of the 97, no point in doing [changing] anything to oem under the hood. About the only worthwhile mod is much louder lower restriction exhausts.

You have a 3.694 differential gear, so a 4.083 gear set would perk up the accelerations a bit [about 2.2%] at the expense of 10% worse highway mpg.

Pretty much limited to light duty supercharging or a 50 HP shot of Nitrous.

[maxnix]

Not that I know of any after market ones, but I thought the headers on the VH41DE weren't especially efficient at extracting the exhaust gases from the heads.

[PalmerWMD]

Read this thread:http://www.nissaninfiniticlub....30966

Fred,,:D

[Q45tech]

Extract is a confusing word as few oem designs are long enough to create a wave reflection.

Untuned and higher back pressure might be a better choice compared to 90-96Q exhaust manifolds.

Unfortunately emission laws forbid changing any component prior to the cats [including precats] and manifolds. Anyway the best biggest exhaust would require changing the exhaust cams to get more than 10 HP.The whole motor is tuned lower [5600 rpm] so exhaust manifolds don't mater much in 32 valve V8 compared to 16 valve V8.

[Tgvince]

I was just at a local manufacture of headers and exhaust today:). We just happened to be under my 97 Q looking to see what we could do. The header is out at least for this shop. The steering is very much in the way for the amount of tubes needed for a good designed header...Albeit IMPUL(650,000! YEN) in Japan has a set for the right hand drive Cima;). So we are looking at going from the exhaust manifold to a pair of highflow sencondary cats on back to an undecided muffler setup...I think im going to be shopping around as this place I normally deal with can only bend 2 1/8th pipe and id like 2.25" Minimum. SO back to finding a local place to proto a dual exhaust. OR spending a bunch of time on my back under the car tacking it up myself (which is a possibility).

Terry Vincent

[rsiwicki]

Quote »Looking for the most economical and reasonable methods to squeeze some more power out of my Q45.[/quote] \

sorry to say...but you are SOL!!!

BTW....economical/reasonable mods and Q45 is like an oxymoron (sp?).....the two just don't go together :pface

[rsiwicki]

here is a link to the only truely radically modded 2nd Generation Q45.....apparently he has Hooker Headers?......I had asked them about the 1st generation and they did not have any that would fit.

http://www.cardomain.com/memberpage/516633

[1992Q45A]

\

sorry to say...but you are SOL!!!

BTW....economical/reasonable mods and Q45 is like an oxymoron (sp?).....the two just don't go together :pface

True 'dat

[Chally]

Echo earlier post, Make sure the ignition system is in perfect condition, as well as all connectors being clean etc, & you should have more grunt than you need.

I just drove an 89 Q45 & it had heaps less power that my 93 Q45. Obviously, not looked after correctly & probably all gummed up.

[maxnix]

Try looking at http://www.i-m-racing.com/infinitiq45.html for some interesting modifications.

There was a guy who had a 97 or 98 he had modified with Stillen parts and a 4.08 rear end. Couldn't find his page, though.

[BadQ45t]

There are just not many easy ways to make these cars faster. I personally have come to terms, I have a pretty quick car with good power. I have kept up with GS400's and BMW 540i's getting on the freeway, they were a little faster.

Get yourself some great rims and tires and enjoy the ride. If you really want a faster car, wait for the new M45 or buy a new M45.

[sijoko]

The owner of the 2001 Q45 in the link is pulling quarter mile times from thin air.

His car supposedly does the 1/4 mile in 15 sec. @ 110mph.

Usually, a car that traps at 110mph in the quarter is in the high 12 sec. or low 13 sec. range.

I would not believe his statement about the Hooker headers either.

I have a pair of OEM manifolds for the Q41. They are not the same design as the ones on the Q45.

They are cast and look like they fit real close to the block. I would guess that the biggest problem in having headers made for the Q41 is lack of space.

Also, the stud pattern is different between the Q45 and the Q41 exhaust manifolds.

If anyone is interested in experimenting, I will sell the Q41 manifolds cheap.

-sijoko

[Tgvince]

[QUOTE]Originally posted by sijoko "]I have a pair of OEM manifolds for the Q41. They are not the same design as the ones on the Q45.

They are cast and look like they fit real close to the block. I would guess that the biggest problem in having headers made for the Q41 is lack of space.

It is very tight in there and on the drivers side the steering linkage is in the way as well. I have some pics ill post but thats probably for another thread.

Terry

[Chally]

Had a drag with a 250Kw Commodore tonight. He couldn't get away & when he changed gears, I ran past him. Believe me, these Q's are quick & FUN!!!

[rsiwicki]

the guys who built my headers had a real pain in the a$$ time getting around the steering column shaft...they actually had to do it twice on the drivers side to get the clearance issues corrected

[TgduMg]

There was a guy who had a 97 or 98 he had modified with Stillen parts and a 4.08 rear end. Couldn't find his page, though.

Click Bonfiree-97Q.

Danisiti 1

[maxnix]

That's it. Thanks.

[Falkdesigns]

Click Bonfiree-97Q.

Danisiti 1

I saw that Q on the 405 the other day near LAX, and it really looked good. As soon as I saw it I knew it was that one.

[maxnix]

I saw that Q on the 405 the other day near LAX, and it really looked good. As soon as I saw it I knew it was that one.

Same plates? If so, guess his Porsche is in the garage again!

[msscomm]

[quote=" maxnix

There was a guy who had a 97 or 98 he had modified with Stillen parts and a 4.08 rear end. Couldn't find his page, though. [/quote]

Maxnix

I think this might be the URL you are thinking of: http://www.bonfireemarketing.com/q45/

I actually like the Gen2 body far more then 3rd Gen, but you cant deny the inevitable march of progress on internals and electronics - It sounds like this puppy has more then made up for the gutting of the engine on the Y33 - would have loved to see an itemized lit of $$ for that rebuilt performance -

Mike

[maxnix]

Quite frankly, when one gets to the Jet chip, I am suspicious of the increased performance claims. Not sure increased capacity injectors and new exhaust could make much of a change with stock TB, intake and exhaust manifolds, no matter how much they are polished.

4.08 rear end is not quite the change from 3.64 that it is for the G50 3.53. Since he didn't mention changing the speed sensor gear, I wonder if all his claims are based on the erroneous speedometer readings?

[Falkdesigns]

Max, yeah, same plates. Maybe it was cause he had a few cuties in the car with him lol. His company is in Pasadena, and that's still in L.A. county.

[TgduMg]

I never noticed the red "R" under the left side of the spoiler lip until today. My eyes have always been drawn to the non symmetrical position of the right side exhaust notch and tailpipe. Danisiti 1

[maxnix]

Strange that for someone that did all his modifications he didn't know the OEM exhaust is dual all the way. Good eye on the offset passenger side outlet.

[Falkdesigns]

Definitely good eye on the offset.

I don't think he didn't know it's dual exhaust, I just think he wanted a tip on each side like many other V8 cars have. Personally, I like the single muffler set up, I'll soon have a nice polished dual tip muffler on mine.