Schrick Cams 284/292

[e46e92love]

I am doing this. Following goals have been laid out, tuner / engine builder has been chosen and have spoken with multiple engine builders and tuners (street background and race background).

The car: May 9, 2011.5 e92, M-DCT, comp pckg, nothing else (no Orem, cloth seats)

Current Mileage: 44k

Goals:
1) remain N/A
2) make power to 8.7-8.8k (because DCT limits at 9k)
3) maintain power curve without completely bouncing it to the right

Early plans:
1) 4.2l engine build
2) bottom / top end replaced (carrillo rods, etc)
3) cams with lift kit
4) possible diff ratio change
5) full time including recalibration of VANOS
6) street legal, but 60-70% time on the track after build

Cheers,
e46e92

[IMG]

Originally Posted by e46e92love

I am doing this. Following goals have been laid out, tuner / engine builder has been chosen and have spoken with multiple engine builders and tuners (street background and race background).

The car: May 9, 2011.5 e92, M-DCT, comp pckg, nothing else (no Orem, cloth seats)

Current Mileage: 44k

Goals:
1) remain N/A
2) make power to 8.7-8.8k (because DCT limits at 9k)
3) maintain power curve without completely bouncing it to the right

Early plans:
1) 4.2l engine build
2) bottom / top end replaced (carrillo rods, etc)
3) cams with lift kit
4) possible diff ratio change
5) full time including recalibration of VANOS
6) street legal, but 60-70% time on the track after build

Cheers,
e46e92

Just curious why not 4.7L ?

[e46e92love]

Originally Posted by IMG

Just curious why not 4.7L ?

Because it would produce way too much power......I have yet to meet anyone who can control a 600+ HP rwd drive car on the track outside the straights and it is completely useless off the track. 600+hp is a lot, for any chasis, and I think too much for this one without considerable race only / off road enhancements.

Not looking to win a drag race or HP war, want a higher revving experience that provides a good power bump over stock in a very balanced packsge. Guesses are at about 500 - 525 at peak.


Cheers,
e46e92

[Acree]

Originally Posted by e46e92love

Because it would produce way too much power......I have yet to meet anyone who can control a 600+ HP rwd drive car on the track outside the straights and it is completely useless off the track. 600+hp is a lot, for any chasis, and I think too much for this one without considerable race only / off road enhancements.

Not looking to win a drag race or HP war, want a higher revving experience that provides a good power bump over stock in a very balanced packsge. Guesses are at about 500 - 525 at peak.


Cheers,
e46e92

To play devil's advocate, the price difference between a 4.2 and a 4.7 has to be fairly negligible. Why not build the best motor you can and then simply detune it? At least it will always be there if you need it. Have your tuner pull 4* of timing out across the board, and viola, 4.2L power levels.

[e46e92love]

Originally Posted by Acree

To play devil's advocate, the price difference between a 4.2 and a 4.7 has to be fairly negligible. Why not build the best motor you can and then simply detune it? At least it will always be there if you need it. Have your tuner pull 4* of timing out across the board, and viola, 4.2L power levels.

Character of engine, stress associated with 4.7 revving to 8800, etc......there is reason the only high revving application such as is is actually a derivative of the S65 that is. 3.7 revving to 10k. Only handful of engines that rev as high as I will be going.

To each is their own and going 4.7 makes no sense for the goals of the project.

Cheers,
e46e92

[Hujan]

Originally Posted by e46e92love

Character of engine, stress associated with 4.7 revving to 8800, etc......there is reason the only high revving application such as is is actually a derivative of the S65 that is. 3.7 revving to 10k. Only handful of engines that rev as high as I will be going.

To each is their own and going 4.7 makes no sense for the goals of the project.

Cheers,
e46e92

If you want low-end and don't mind sacrificing some revs, go with a 4.6 L stroker. Lightweight components might help reduce engine stress from the extra stroke.

If you want high-end, go with a 4.2 L bored engine on the factory stroke, throw some cams at it, and put a premium on lightweight components to decrease engine stress at high revs.

I'm of two minds: On one hand, my car spends a lot of time on the street and the low-end torque of the 4.6 L stroker is appealing to me. On the other hand, with a 4.2 L, you could get up toward 9k RPM and shed some weight from the engine in the process, which would be cool. A 4.2 L with a higher final drive (e.g., 3.45 for the DCT) might be the best of both.

[OM VT3]

Originally Posted by Hujan

If you want low-end and don't mind sacrificing some revs, go with a 4.6 L stroker. Lightweight components might help reduce engine stress from the extra stroke.

If you want high-end, go with a 4.2 L bored engine on the factory stroke, throw some cams at it, and put a premium on lightweight components to decrease engine stress at high revs.

I'm of two minds: On one hand, my car spends a lot of time on the street and the low-end torque of the 4.6 L stroker is appealing to me. On the other hand, with a 4.2 L, you could get up toward 9k RPM and shed some weight from the engine in the process, which would be cool. A 4.2 L with a higher final drive (e.g., 3.45 for the DCT) might be the best of both.

Alexshops 4.6 makes power all the way to redline I think you just need cams

[1MOREMOD]

Interesting worried about too much power. Lots of people can control 600 hp? Watch any race series

[Hujan]

Originally Posted by leigh

Alexshops 4.6 makes power all the way to redline I think you just need cams

My concern is not so much the power dropping off before redline, but having to reduce the redline due to engine stress from the longer stroke.

[1MOREMOD]

Originally Posted by Hujan

My concern is not so much the power dropping off before redline, but having to reduce the redline due to engine stress from the longer stroke.

Your right longer stroke can do some damage

[e46e92love]

Originally Posted by Hujan

My concern is not so much the power dropping off before redline, but having to reduce the redline due to engine stress from the longer stroke.

Bingo.

Cheers,
e46e92

[e46e92love]

Originally Posted by 1MOREMOD

Interesting worried about too much power. Lots of people can control 600 hp? Watch any race series

Yes, plenty of PROFESSIONAL drivers can handle that. But unless your name is tony Kannan or one of the other professional drivers on here, it ain't happening.

I will go one better, Tony is on here and I would bet he will tell you that half the guys on here with 600hp cars are at best unbalanced. This chasis needs work all over to handle that on Sebring and Limerock, unless of course you just are not using the power.

I can guarantee a professional with my stock car would lap 100% of the amateurs on here with 600hp.

Nothing wrong with high HP cars, they are cool as shit and I love seeing them and hearing about the builds. But for me, spinning the wheels thru 3rd is not fun and adding weight up front is not my goal. Different strokes for different folks

Cheers,
e46e92

[1MOREMOD]

I see you said you haven't met anyone that can handle not their aren't people that can handle 600hp. Your right most would be pros but lots of good drivers at lower levels also. I know I would be slower with 600hp now but hope that isn't always the case.

[regular guy]

Originally Posted by e46e92love

Yes, plenty of PROFESSIONAL drivers can handle that. But unless your name is tony Kannan or one of the other professional drivers on here, it ain't happening.

I will go one better, Tony is on here and I would bet he will tell you that half the guys on here with 600hp cars are at best unbalanced. This chasis needs work all over to handle that on Sebring and Limerock, unless of course you just are not using the power.

I can guarantee a professional with my stock car would lap 100% of the amateurs on here with 600hp.

Nothing wrong with high HP cars, they are cool as shit and I love seeing them and hearing about the builds. But for me, spinning the wheels thru 3rd is not fun and adding weight up front is not my goal. Different strokes for different folks

Cheers,
e46e92

I hate those professional drivers like TK because it always reminds me that they know how to set up and drive a car...and I don't.

No seriously, I love a good technician like TK and would love to see how he'd drive a car like this.

[Hujan]

Originally Posted by 1MOREMOD

Your right longer stroke can do some damage

Uh, "that's what she said"?

[Malek@MRF]

Originally Posted by Hujan

My concern is not so much the power dropping off before redline, but having to reduce the redline due to engine stress from the longer stroke.

Correct.

[s85e90]

Your first answer should've been that: Long stroke = lower RPM, Shorter stroke = higher RPM

[e46e92love]

Originally Posted by regular guy

I hate those professional drivers like TK because it always reminds me that they know how to set up and drive a car...and I don't.

No seriously, I love a good technician like TK and would love to see how he'd drive a car like this.

TK is the man.....pro who is an actual enthusiast.

[sebaflex]

Originally Posted by e46e92love

I am doing this. Following goals have been laid out, tuner / engine builder has been chosen and have spoken with multiple engine builders and tuners (street background and race background).

The car: May 9, 2011.5 e92, M-DCT, comp pckg, nothing else (no Orem, cloth seats)

Current Mileage: 44k

Goals:
1) remain N/A
2) make power to 8.7-8.8k (because DCT limits at 9k)
3) maintain power curve without completely bouncing it to the right

Early plans:
1) 4.2l engine build
2) bottom / top end replaced (carrillo rods, etc)
3) cams with lift kit
4) possible diff ratio change
5) full time including recalibration of VANOS
6) street legal, but 60-70% time on the track after build

Cheers,
e46e92

Sounds like a perfect NA Build. Which cams are you planning to go with?

[8k3]

Umm this is M3Post aren't we all Pro drivers? Ok j/k, sorry boring Tuesday

[e46e92love]

Originally Posted by 8k3

Umm this is M3Post aren't we all Pro drivers? Ok j/k, sorry boring Tuesday

LOL!!!!!

Cheers,
e46e92

[e46e92love]

I would definitely not go to a professional engine builder and software tuner for these questions, the people on this forum are much better to provide you with accurate info that will allow you to make an educated decision.

Cheers,
e46e92