4.5 vs. 5.6

*mach1* · 03-05-2006, 08:06 PM

I was just looking at the infiniti web page to see what cars came with the 4.5 since that is the motor the 5.6 is based off of. Its basically a bored and stroked 4.5.

anyway, that dam Q45 puts out 340 HP!

You think the Titan would easily top that mark then? I guess they wanted to keep the titan simple (no variable valve timing or variable intake manifold), but dam, Im impressed with the Q45's numbers. It has like 333 ft. lb. of tourqe also, not bad for a smaller displacement 8 banger.

Titano24's · 03-05-2006, 08:43 PM

Quote:

Originally Posted by mach1

I was just looking at the infiniti web page to see what cars came with the 4.5 since that is the motor the 5.6 is based off of. Its basically a bored and stroked 4.5.

anyway, that dam Q45 puts out 340 HP!

You think the Titan would easily top that mark then? I guess they wanted to keep the titan simple (no variable valve timing or variable intake manifold), but dam, Im impressed with the Q45's numbers. It has like 333 ft. lb. of tourqe also, not bad for a smaller displacement 8 banger.

they left alot of wiggle room in the 5.6......hehe I say its good for clean over 400hp on pump gas if they tweek it

Smoke05 · 03-05-2006, 10:19 PM

Also the 5.6 also probably makes it's hp and torque at much lower rpm's.

*mach1* · 03-05-2006, 11:13 PM

It does make it at lower RPM, but they could have easily put out closer to 350 HP i would think. Oh well, then it would probably be even thirstier than it is. Have to look at the bright side...lol

pi3yeargrad · 03-05-2006, 11:26 PM

Quote:

Originally Posted by mach1

It does make it at lower RPM, but they could have easily put out closer to 350 HP i would think. Oh well, then it would probably be even thirstier than it is. Have to look at the bright side...lol

well, just let me know how to hit that 400HP range without a blower...would be great...how much u think itd cost? more than a sc or tc?

RxZ · 03-05-2006, 11:30 PM

Quote:

Originally Posted by pi3yeargrad

well, just let me know how to hit that 400HP range without a blower...would be great...how much u think itd cost? more than a sc or tc?

I think future models with some sort of variable valve timing would at least have more horses than we now have.

In any case, I am happy at the moment with my power (I can outrun all my parents in their new trucks muhahaha [my dad's top of the line gmc sure does have alot of bells and whistles though])

Titano24's · 03-05-2006, 11:40 PM

Quote:

Originally Posted by pi3yeargrad

well, just let me know how to hit that 400HP range without a blower...would be great...how much u think itd cost? more than a sc or tc?

new intake manifold.........better headers.........variable valve timing.....more advance.........higher compression........more aggressive cams.......lighter internals........the list goes on and on and on.........you get the picture

*mach1* · 03-05-2006, 11:51 PM

Quote:

Originally Posted by pi3yeargrad

well, just let me know how to hit that 400HP range without a blower...would be great...how much u think itd cost? more than a sc or tc?

Getting 100 more HP naturally aspirated requires a lot of aftermarket parts that are not available for the titans 5.6, and you usually run into driveability problems when you start throwing big camshafts at computer controlled cars.

You would be better off to just get the supercharger.

I would like to see someone else come out with a supercharger kit for this application. I dont know what the hold up is? I want a centrifical style blower, like Paxton for one. There are several companies making these type kits. I suppose one will be available for the Titan eventually? Maybe thier afraid they will blow apart the plastic intake?

pi3yeargrad · 03-05-2006, 11:57 PM

Quote:

Originally Posted by mach1

Getting 100 more HP naturally aspirated requires a lot of aftermarket parts that are not available for the titans 5.6, and you usually run into driveability problems when you start throwing big camshafts at computer controlled cars.

You would be better off to just get the supercharger.

I would like to see someone else come out with a supercharger kit for this application. I dont know what the hold up is? I want a centrifical style blower, like Paxton for one. There are several companies making these type kits. I suppose one will be available for the Titan eventually? Maybe thier afraid they will blow apart the plastic intake?

that thing kinda looks like the one on my LS1...any differences or likenesses??

*mach1* · 03-06-2006, 02:45 AM

Sorry, i dont know much about GM's, as I stay as far away as possible. Mustang man here.

BigA · 03-06-2006, 05:52 AM

They left room with the 5.6 so every couple years they can bump up the power as needed to keep up with the competition. I heard the 2007's are going to have 320 Hp.

pi3yeargrad · 03-06-2006, 12:02 PM

Quote:

Originally Posted by mach1

Sorry, i dont know much about GM's, as I stay as far away as possible. Mustang man here.

oh aight just wondering...the LS1 is a 5.7 and they look somewhat the same ("plastic" intake)

*mach1* · 03-06-2006, 12:07 PM

Quote:

Originally Posted by pi3yeargrad

oh aight just wondering...the LS1 is a 5.7 and they look somewhat the same ("plastic" intake)

I know that much. what exactly are you looking for? Are they similar? Sure, they are both v8 plastic intake manifolds. You can do a visual on them and determine that yourself.

Does the ls1 have variable intake runners? I dont think it does but it might.

HudsonValleyTitan · 03-06-2006, 03:13 PM

Quote:

Originally Posted by BigA

They left room with the 5.6 so every couple years they can bump up the power as needed to keep up with the competition. I heard the 2007's are going to have 320 Hp.

Concidering that the 5.6 you have now already dynos at about 335 or so HP, not a hard thing to do. All they have to do is say it....it's already there. My guess is that Nissan won't go the VVT route just yet. Instead, I'm thinking new headers, exhaust, tweeked ECU would easily yeild an additional 40 HP with no problem. More than enough for a stock 1/2 ton truck.

Smoke05 · 03-06-2006, 11:00 PM

Quote:

Originally Posted by mach1

It does make it at lower RPM, but they could have easily put out closer to 350 HP i would think. Oh well, then it would probably be even thirstier than it is. Have to look at the bright side...lol

Low rpm power is what makes a good truck engine. Especially gobs of low rpm torque. The HP figure is pretty much irrelevant in this case. Just look at the Hemi. Plenty more HP but shy on torque and the Titan is right there with it when it comes to performance.