In for the long haul Ultimate NA build thread.

[Summerwolf]

I am really interested in these cams and what people truly gain.

[celek]

Originally Posted by solidONE

They're going to swap the cams but not dyno the things.... ooookkkay

A lot of companies are hush hush on results, or do not bother reporting to the manufacture when using a product as they fine tune it. Unlike myself I will post numbers.

[celek]

Originally Posted by Hyper4mance2k

You should take that manifold and make a 4 barrel carb adapter.

Won't make as much power without the DI. Would lose the high end timing. Also not customizing the fuel pump setup for lower pressures.

[Tim Radley]

I tried an early soft version and with other changes gained 25bhp.
Have got a hotter set to try but just not had time to fit them. I'll most likely wait until I fit a turbo to be fair as my time with the car is very limited.

[sato]

Originally Posted by Spartarus

Not that interference problem. Interference as in piston hitting valve during normal operation, necessitating a different piston design with more clearance. New pistons = more cash.

Other issues include losing much/most of your VVT adjustability range due to the same issue, again necessitating new pistons.

Thanks for the gentle reminder

Originally Posted by Summerwolf

1059.58 currently for the set of four cams..... wow.

I know there are four cams instead of two, but wow

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[DocWalt]

Seems like a reasonable price for cams IMO, especially if manufactured in a similar fashion to OEM with the hollow shafts and pressed on lobes.

[HUNTERANGEL121]

Originally Posted by sato

Thanks for the gentle reminder



I know there are four cams instead of two, but wow

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You're paying for four cams but if you them to each other it's the same size as one normal cam on an i4. That's how it works, right?

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[Summerwolf]

Pretty much, just two cylinders next to each other instead of four.

Unfortunately, coming from the "LSx" community.... 1000+ for cams is rediculous, lol.

[celek]

Originally Posted by Summerwolf

Pretty much, just two cylinders next to each other instead of four.

Unfortunately, coming from the "LSx" community.... 1000+ for cams is rediculous, lol.

Much better option than HKS at $1800 though

[solidONE]

Originally Posted by Tim Radley

I tried an early soft version and with other changes gained 25bhp.
Have got a hotter set to try but just not had time to fit them. I'll most likely wait until I fit a turbo to be fair as my time with the car is very limited.

It would be nice to know how much gains yielded by the cams themselves. I've gained about 30whp on "other changes" with stock cams, so when you say +25bhp with cams and 'other mods' its not saying too much.

[celek]

Originally Posted by solidONE

It would be nice to know how much gains yielded by the cams themselves. I've gained about 30whp on "other changes" with stock cams, so when you say +25bhp with cams and 'other mods' its not saying too much.

1. Brake Horse Power (bhp)

This is the power output of any engine measured at the engine's flywheel. (A flywheel is a disc with teeth on it. It's connected to the rear of the engine and its purpose is for the smooth transfer of power to the transmission from the engine.)
2. Wheel Horse Power

Unlike bhp, whp is the power output measured at the wheels. This is the information a dyno run provides and usually reads around *15 per cent less than the power measured at the engine (bhp) - this is because power is lost in the driveline (including clutch and transmission). *Four-wheel drive cars lose between 20-25 percent of their quoted bhp figure because of the increased friction.

Advanced info

The term brake horsepower (bhp) refers to a device called ‘Prony Brake’ (invented by Gaspard de Prony), which was used to measure engine power in the early 1900s. 2. You don't need to increase an engine's bhp to get an increase in a vehicle's whp. You can achieve higher whp by reducing the rotational mass in your drivetrain, such as the wheels, tyres, brakes, clutch, flywheel, etc.

In short BHP is an actual increase of output at the engine, whereas WHP can be changed not only by BHP but also mass reduction.

[Gear_One_Performance]

The other nice benefit is being able really ring the motor out without losing efficiency. Being able to stay in gear 1000 rpm longer than your competition is a nice plus.

[solidONE]

Originally Posted by celek

1. Brake Horse Power (bhp)

This is the power output of any engine measured at the engine's flywheel. (A flywheel is a disc with teeth on it. It's connected to the rear of the engine and its purpose is for the smooth transfer of power to the transmission from the engine.)
2. Wheel Horse Power

Unlike bhp, whp is the power output measured at the wheels. This is the information a dyno run provides and usually reads around *15 per cent less than the power measured at the engine (bhp) - this is because power is lost in the driveline (including clutch and transmission). *Four-wheel drive cars lose between 20-25 percent of their quoted bhp figure because of the increased friction.

Advanced info

The term brake horsepower (bhp) refers to a device called ‘Prony Brake’ (invented by Gaspard de Prony), which was used to measure engine power in the early 1900s. 2. You don't need to increase an engine's bhp to get an increase in a vehicle's whp. You can achieve higher whp by reducing the rotational mass in your drivetrain, such as the wheels, tyres, brakes, clutch, flywheel, etc.

In short BHP is an actual increase of output at the engine, whereas WHP can be changed not only by BHP but also mass reduction.

ORLY? lol

The WHP I yielded form "other changes" over baseline use the same or similar drive-line components. Same model clutch, flywheel, driveshaft, diff, halfshaft, hubs, studs etc. Tire and wheels were slightly different. 17x8 RPF1 with 225 tires for baseline, 17x9 RPF1 with 255 tires used when measuring WHP gained from (other mods). I'm sure if BHP was measured with the baseline and after my "other mods" on stock cams it would still be more than +25bhp.

Point is I'd like to see the gains from the cams alone, with all else the same or with only cams and tune being different.

[jarnojvv]

Just a question: how does weight reduction increase whp? It surely only improves response and feeling. It would be interesting to see how much focused mods can reduce the driveline friction to increase the real whp.