JayEmm reviews 1M conversion with V8 and M2 interior

[cjb762]

Nice review of a really well made and beautiful car. What I would like to know though is: how hard is it to put M2 rear seats in an E82??? I really want to do that for some weird reason...

[WrathOTM]

Love JayEmm been watching him for a while now.

Not sure about the rear seat swap, is there any major difference? I'd rather do a rear seat delete along with the front fancy M2 seats and floormats.

[cjb762]

Originally Posted by WrathOTM

Love JayEmm been watching him for a while now.

Not sure about the rear seat swap, is there any major difference? I'd rather do a rear seat delete along with the front fancy M2 seats and floormats.

Not really that major of a difference. They look a little different - a little more modern to my eyes. That's my weird reason I guess... That they just look a little better to me. Plus they would better match the manual F22 front seats that I picked up when I got here. Will be moving back home next summer, and can't wait to get them in the 135!

(here are pics of the differences - E82 top, F22 bottom)

[WrathOTM]

Hmm, I see. Not sure that can be swapped in. I like the brighter red of the newer one, unless that is just the pics lighting.

Post pics of the seats you got

[cjb762]

Originally Posted by WrathOTM

Hmm, I see. Not sure that can be swapped in. I like the brighter red of the newer one, unless that is just the pics lighting.

Post pics of the seats you got

I don't think they are actually any brighter - just the lighting.

Here are the ones I got:

[Chorn519]

Those 4.0l V8’s go for $15k even with a 100k miles on them.

[aresfiend]

Originally Posted by Chorn519

Those 4.0l V8’s go for $15k even with a 100k miles on them.

Most of them that I can find are a little over half that with nowhere near that mileage.

[lucahemi@gmail.com]

Why not just LS swap

[amg6975]

Originally Posted by Chorn519

Those 4.0l V8’s go for $15k even with a 100k miles on them.

I bought a whole [cosmetically] wrecked 2013 M3 with 48,000 miles for less than that.

Originally Posted by lucahemi@gmail.com

Why not just LS swap

Way, way, way easier to S65 swap. It's almost plug and play.

[Chorn519]

Originally Posted by lucahemi@gmail.com

Why not just LS swap

Exactly. Way more reliable.

[LaKuan]

I love the V8, but N54 and N55 make the same power as the S65 on the m3 VERY easily. I just think its pointless really.

[amg6975]

Originally Posted by LaKuan

I love the V8, but N54 and N55 make the same power as the S65 on the m3 VERY easily. I just think its pointless really.

They can make the same peak power very easily but try replicating the torque curve and throttle response. I agree for a road car I think the swap is kind of silly but for a car that lives on track (like mine) the S65 is light years better.

[mfindigital]

Originally Posted by amg6975

They can make the same peak power very easily but try replicating the torque curve and throttle response. I agree for a road car I think the swap is kind of silly but for a car that lives on track (like mine) the S65 is light years better.

I'm naïve here, why would the m3's peakier power and torque curve be advantageous? I'd think a hybrid turbo or slighly larger than stock turbo on an N motor would have similar power graphs?

I'd think the biggest advantage is the simplicity of NA motors. To me, it seems most people do it for the sound.

[amg6975]

Originally Posted by mfindigital

I'm naïve here, why would the m3's peakier power and torque curve be advantageous? I'd think a hybrid turbo or slighly larger than stock turbo on an N motor would have similar power graphs?

I'd think the biggest advantage is the simplicity of NA motors. To me, it seems most people do it for the sound.

You have it backwards. The S65's torque curve is dead flat, the N54/55 have a very peaky torque curve. Horsepower is simply a function of torque and RPM. HP = Tq * RPM/5252. A flat torque curve is what you want on track so every time you put your foot in it you have a predictable amount of torque being sent to the wheels.

My car was a full "Stage 2" N55 that saw a ton of track time. When it blew up I did the S65 swap. It probably has 100 less peak ft-lbs now, and likely only a marginal HP advantage.

My home track is Watkins Glen, acceleration on the straights is fairly similar between the two, the only big difference is exiting turn 7, up the hill to 8 the N55 was faster because of the big torque advantage. However, the S65 powered car is light years easier to drive at the limit so my lap times dropped drastically, like 4-5 seconds per lap. I used to run in the 2:15-2:17 range and now am now easily down in the 2:11-2:13s with everything else being pretty much exactly the same, and the tires actually being a little worse since I went Continental ECF (vs RE71R on the N55 car) to have a consistent seat-time tire.

Then there's all the other issues, N55 oiling problems, overheating issues, fuel consumption, etc etc etc. The S65 is all around a whole different league.

If you want to punch it at a green light and impress your friends, the N55/54 is definitely better but if you want a smooth and predictable car on the track the S65 is significantly better.