Trd Cai ?

[ToyotaTom]

I was thinking of swapping out my OEM CAI for the TRD version on my NEW 2008 Tundra 5.7. I already have the TRD factory dual exhaust. My question is do you still have to use the OEM charcoal filter or is it eliminated altogether, and do you have to re-tune or change any computer settings? Also can anyone tell me what the HP gain might be from adding the TRD Dual Exhaust and the TRD CAI to the 5.7 engine? Thanks in advance.

ToyotaTom

[2008_CrewMax]

no computer settings will need to be changed.

probably a few horsepower from each

[Deznutjob]

Originally Posted by ToyotaTom

I was thinking of swapping out my OEM CAI for the TRD version on my NEW 2008 Tundra 5.7. I already have the TRD factory dual exhaust. My question is do you still have to use the OEM charcoal filter or is it eliminated altogether, and do you have to re-tune or change any computer settings? Also can anyone tell me what the HP gain might be from adding the TRD Dual Exhaust and the TRD CAI to the 5.7 engine? Thanks in advance.

ToyotaTom

All existing filter equipment including charcole filter is removed. I'm hearing the TRD intake matches up the best with the TRD exhaust.

[jpnca]

I have the TRD CAI and exhaust and I'm happy with both of them. The CAI is stupid easy to install

[ToyotaTom]

jpnca,
thanks for the neat pics. I see you also opted not to cutout the engine cover and just raise it instead. I think this is a very good idea in case you decide to go back to OEM. I also checked on the cost of an engine cover replacement if you did cut it out for the intake pipe and man o man talk about sticker shock $$$. I will bet most guys will opt to raise instead of cut if they knew what it cost to replace the engine cover. You see all kinds of claims for HP increase like Volant CAI=21, K&N CAI=15, etc, etc, but nobody has said what a TRD CAI or TRD CAI and TRD Dual exhaust will get you as for as increased HP. Why is this?

Does Toyota have any specs on this? You would think for sure that they would have done some testing on all the above. I also read somewhere on this site where a tech said that you run the risk of leaning out the engine if you increase the air intake to much.

ToyotaTom

[ramoine]

Originally Posted by jpnca

I have the TRD CAI and exhaust and I'm happy with both of them. The CAI is stupid easy to install

Hey , that would go well my Truck !

Thanks for the pics !

[TexBiker]

Originally Posted by ToyotaTom

Does Toyota have any specs on this? You would think for sure that they would have done some testing on all the above.

TRD CAI Performance Claims from Toyota:

Horsepower: +8.0hp @ 5,600 rpm
Torque: +7.5 ft-lbs torque @ 5,600rpm

[Deznutjob]

Great pics JP! That's inspired me to do my intake and exhaust now.

[ToyotaTom]

TexBiker,
thanks for the info as that's exactly what I just found out also. Do you have any figures on HP gain when going from factory OEM exhaust to the TRD Dual exhaust on the 5.7 engine.

Also am I correct that the total gain for the TRD CAI might be more when used in conjunction with the TRD Dual Exhaust? Is it possible to gain appx 20+hp with both mods installed IYO?

I can believe the 8.0 hp gain as you stated for the TRD CAI but have a hard time with some of the other MFG's claims for their CAI's.

Toyota rates the 5.7 Tundra as having 381 HP. Is this rated at the Flywheel or at the rear tires as this makes a big difference when comparing different vehicles.

ToyotaTom

[2008_CrewMax]

Originally Posted by Deznutjob

Great pics JP! That's inspired me to do my intake and exhaust now.

whatcha gunna go with?

[Deznutjob]

Originally Posted by 2008_CrewMax

whatcha gunna go with?

Not sure yet but there is so much great info on this site, I guess I'm gonna gather facts fron our site then weigh it all out. I like the idea of matching the TRD intake with the TRD exhaust! I'm also tempted to pull the trigger on the RMJ exhaust. Just don't know but I'll attach it to my signature when it's done.

[TexBiker]

Originally Posted by ToyotaTom

Toyota rates the 5.7 Tundra as having 381 HP. Is this rated at the Flywheel or at the rear tires as this makes a big difference when comparing different vehicles.

That's the rated power at the flywheel. I don't know of any mfg that advertises horsepower at the wheels. Rear wheel horsepower is closer to 300 - 310 for a stock 5.7L Tundra...depending on the dyno, conditions, etc. A guy on another forum reported a ~15hp gain with the TRD CAI and duel exhaust according to his dyno testing. YMMV, of course.

[ToyotaTom]

Originally Posted by TexBiker

That's the rated power at the flywheel. I don't know of any mfg that advertises horsepower at the wheels. Rear wheel horsepower is closer to 300 - 310 for a stock 5.7L Tundra...depending on the dyno, conditions, etc. A guy on another forum reported a ~15hp gain with the TRD CAI and duel exhaust according to his dyno testing. YMMV, of course.

Thanks TexBiker,
that is more in line with what I thought it might be and it's hard to argue with before/after dino testing. If this guy got a 15hp gain at the rear wheels with both mods what would that equate to at the flywheel in hp, any idea?

ToyotaTom

[TexBiker]

I'd imagine you could add 25% to those rear wheel numbers and be in the ballpark in regards to the flywheel HP.

[jpnca]

Originally Posted by ToyotaTom

jpnca,
thanks for the neat pics. I see you also opted not to cutout the engine cover and just raise it instead. I think this is a very good idea in case you decide to go back to OEM. I also checked on the cost of an engine cover replacement if you did cut it out for the intake pipe and man o man talk about sticker shock $$$. I will bet most guys will opt to raise instead of cut if they knew what it cost to replace the engine cover. You see all kinds of claims for HP increase like Volant CAI=21, K&N CAI=15, etc, etc, but nobody has said what a TRD CAI or TRD CAI and TRD Dual exhaust will get you as for as increased HP. Why is this?

Does Toyota have any specs on this? You would think for sure that they would have done some testing on all the above. I also read somewhere on this site where a tech said that you run the risk of leaning out the engine if you increase the air intake to much.

ToyotaTom

Ya I didnt trim the cover but I will. It hits a little and is rubbing off the red on the tube. I tried to clock the tube back and forth to stop the rubbing but still hits a little