I have a 2007 Infiniti M45 that has 105,000 miles on it. I have had it for a year. It had 98,000 miles.I have had no problems with it. I change the oil every 3,000 miles, and spark plugs and transmission fluid a year after I got it. Plugs where in terrible shape. I had a 2004 but was hit and totaled. Price 8.000 dollars for this car. Exterior in excellent condition, interior too. Factory plugs are expensive but there was a difference in performance. I am 72 and my car goes fast for me. Does not burn oil. Covid has stopped me from traveling much. I have no complaints so far, except for gas, but I am not complaining. No engine lights. I'm Good and Happy and Blessed by the Best. Jesus.

Congrats!

Thank you

Well done! The older Ms are like teeth. They last forever if you take care of them, LOL.

Yeah.So far so good.

Change the oil OFTEN!

sometimes 2000 miles

oil is only 35 dollars to fill this gas tank cost 45 to 60 dollars.hey logic cant replace a engine for 35 dollrs

basjcksn2 wrote: ↑

Thu Feb 18, 2021 1:39 pm

cant replace a engine for 35 dollrs

Can I hear an Amen?!

Larz wrote: ↑

Wed Feb 17, 2021 5:42 am

Well done! The older Ms are like teeth. They last forever if you take care of them, LOL.

Which of the model years Ma are you referring to, because I have an M45 2003/04?

Was the question for me.2007

I see a whole lot of the replyers have the 2004 infiniti m45.I loved my car.I called it the batmobile.Totaled.Black.Guy ran across a four lane highway during rush hour.

3rd owner to my 2007 M45. I have about 311,000 miles on it. I've replaced tyranny twice while owning it and replaced both valve covers and gaskets. I love this car and am trying to make it even quicker. Anyone have any suggestions? This is my project car. I want to just build up from the bottom so let me know anyone!

Datniqqamycole wrote: ↑

Sat Dec 03, 2022 10:31 am

3rd owner to my 2007 M45. I have about 311,000 miles on it. I've replaced tyranny twice while owning it and replaced both valve covers and gaskets. I love this car and am trying to make it even quicker. Anyone have any suggestions? This is my project car. I want to just build up from the bottom so let me know anyone!

How much money do you have for it?

EniGmA1987 wrote: ↑

Sat Dec 03, 2022 12:36 pm

Datniqqamycole wrote: ↑

Sat Dec 03, 2022 10:31 am

3rd owner to my 2007 M45. I have about 311,000 miles on it. I've replaced tyranny twice while owning it and replaced both valve covers and gaskets. I love this car and am trying to make it even quicker. Anyone have any suggestions? This is my project car. I want to just build up from the bottom so let me know anyone!

How much money do you have for it?

I have unlimited brotha! As long as I go to work lol but yeah I've dumped almost 5K into this car. Bought it for 2.4K.. This car is freaking quick though! High key want to make it a sleeper. Keep it looking stock but once running it everyone eating dust

Datniqqamycole wrote: ↑

Sun Dec 04, 2022 3:03 am

EniGmA1987 wrote: ↑

Sat Dec 03, 2022 12:36 pm

How much money do you have for it?

I have unlimited brotha! As long as I go to work lol but yeah I've dumped almost 5K into this car. Bought it for 2.4K.. This car is freaking quick though! High key want to make it a sleeper. Keep it looking stock but once running it everyone eating dust

There are not too many engine mods you can do outside of the intake and exhaust. Most bolt on things like manifolds and such are for the 35DE since that was the car in the G35 and 350Z. Your best bet for big power gains would be to replace the connecting rods and get some low compression pistons from CP and then install a turbo charger onto the engine.

Eagle H-Beam Rode are around $900-1000 and will be both lighter and support 600 whp
CP pistons (or Wiseco) will probably be about $1200-1500 these days. You custom order them with a .5mm over bore size and ask for a 9:1 ratio instead of the stock 10.5:1
While getting those installed, have the cylinder honed out the .5mm you need for the pistons. This will 1) let you use the OS pistons and 2) give you a nice and fresh, smooth cylinder wall again like a new engine.
Of course you will get all new bearings for the rods when you install them so those will be new too.
Inspect the valves and the seating area on the cylinder heads when doing this, and if necessary re-grind them just a tad and polish them up so the valves seat like new again.
Oh and I almost forgot, have some larger fuel injectors installed. Depending on your horsepower target you would want to get different injectors. 400whp, Id do 500cc injectors. 600whp Id go with 750cc injectors.

Parts and labor so far, you'd be looking at $4500-5000~

Then while the engine is out of the car, modify one (or both) of the exhaust headers so you can redirect the flow to a turbo. Get everything installed back and have some custom exhaust piping done up to get the exhaust going to where the turbo will mount in the engine bay. No room to mount it directly to the manifold, it will need to be mounted closer to the front. Once the exhaust piping is done and turbo mounted, install and intercooler and have some custom intake piping go from the turbo to the intercooler, then back up to the throttlebody and into the engine.

I would personally do a small turbo (somewhere 7~ psi), intercooler, and all the custom piping you'd probably be looking at around another $4000-5000. Without rebuilding the transmission for extra power you wont really want to go above 400-425, so a small turbo will get you there nicely and you will be able to use it without any turbo lag. If you really want extra HP when doing all this, and want to target about 600 at the wheels then you would have to spend ANOTHER $5000~ on rebuilding the transmission for it.

So all in, about $10k for 400 hp at the wheels (you have 325bhp stock which is closer to 275 at the wheels), $15k for 600 whp.




Your other option for more power would be to stay naturally aspirated. You wont need new connecting rods for this, thought it would help you rev faster. You would again want custom pistons, and this time ask for 11.5:1 compression instead. Do the same .5mm overbore and cylinder work for that size. At over 300k miles your cylinders will be scratched to hell by now so it will be good to have those back as smooth as new. You could look into aftermarket camshafts, but I dont personally know of any for the VK45DE. You will be street driving this, so you only want a very mild increase in intake duration. No increase in lift, as that will loose you low end torque. And I dont think you need any real increase in exhaust duration either but if all they have is a small duration increase there as well then thats fine. I would also replace the rod bearings while doing this since you will already have them out to put the pistons in anyway.

A dyno tune after the new pistons will probably get you an extra 30-40 horsepower or so, probably brining you to 300 at the wheels or a little more. With cams as well you might get an extra 15-25hp.

You could choose to go E85 fuel if you have easy access to it. Do a search of gas pumps near you with the fuel. For that you would need to increase the injectors to 500cc again, and replace your fuel pump to support the fuel. A tune with the new pistons and E85 you would probably be closer to 325 wheel horsepower.

All in for pistons, cams, injectors, and fuel pump, plus tune youd probably be looking at around $5500~ which could have you as much as 350 wheel horsepower. A better deal than a 400hp turbo setup for sure.

I'm so glad I found this forum. I've been searching and searching for mods and after market upgrades and nothing comes up. Yes the g35 was the car to get I guess. I'd been talking to a colleague of mine and telling him this car has a ton of potential. This engine was in the gtr for Christ sake. Definitely going to look into this. Thank you @enigma1987

Datniqqamycole wrote: ↑

Sun Dec 04, 2022 9:45 am

I'm so glad I found this forum. I've been searching and searching for mods and after market upgrades and nothing comes up. Yes the g35 was the car to get I guess. I'd been talking to a colleague of mine and telling him this car has a ton of potential. This engine was in the gtr for Christ sake. Definitely going to look into this. Thank you @enigma1987

Lol. Well, I'm probably the only one left on this subforum who has done these sorts of mods in the past so don't get too excited on the knowledge pool available. My area of experience is also more on the VQ35DE side as that is what I built out. You can find a lot more knowledge on the engine subforum for this family of engines.
vh45de-vk45de-vk56de-forum.html


I was just giving you some general high budget upgrade paths, but if your budget truly is unlimited then you could do any crazy stuff you wanted. bore and sleeve the cylinders and you can do things like run large custom pistons or maybe even VK56DE pistons in the engine and get up to about 5L displacement. That would push up your HP by a lot. You could also go fully custom intake with your own 1-off manufactured manifold that basically just uses the base of the existing manifold and goes up into mounting flanges to mount individual throttle bodies onto each cylinder. That would give you better throttle response and some more HP. All these things with custom 1-off parts are big $$$ these days with labor rates though, but they could push you to the absolute limit of the different upgrade paths.

Datniqqamycole wrote: ↑

Sat Dec 03, 2022 10:31 am

3rd owner to my 2007 M45. I have about 311,000 miles on it. I've replaced tyranny twice while owning it and replaced both valve covers and gaskets. I love this car and am trying to make it even quicker. Anyone have any suggestions? This is my project car. I want to just build up from the bottom so let me know anyone!

You could build a 5.6 like Chris Forsberg and drop it in OR just LS swap it. You would prob be the first!

Anyone still here? So my transmission keeps slipping and sounds like something grinding like drive shaft or something. Is there any way to help this trans keep up with my foot or do i just bulk order transmissions lmao