Video of my Turbo 525i

[Anton CH.]

OK so how is that 8.5? Judging by that figure above the AFRs don't dip bellow 10.

[Jon K]

OK so how is that 8.5? Judging by that figure above the AFRs don't dip bellow 10.

What in the hell - read the screen. Thats a screenshot I just happen to have online, I didn't take it just for this. At that point, letting off of boost, its 10.1:1. You can see the line is even lower to the left of it, its in the 8's. The scale is not linear. Additionally, if it doesnt dip below 10, then why would it show the max of 21.9 (pure air) and min 8.5? That SS is just when I was looking for my boost level before lift. The Max and Min values are the max and min of that field on the table. The min being 8.5:1

[aston_jag_tech]

Cool data log. I just read some info on turbos and I think I understand why you chose a large turbo. I liked the vid, except for music....and the faggy hand wave, lol.

[Espen]

Im stunned! I really want to turbo my car to, but the MS thing is not my field.

But how can your 2.5 turbo be faster than a 3.5 turbo, remember, there is no replacement for displacement. So if you have 1bar boost, and the 535 have 1 bar boost, the 535 will have more torque and hp. If both engines are in good condition that is.

[Jon K]

Espen - while my H1E moves 72#/min of air, the turbo on the 3.5L may only move 30#/min if that. Additionally, there are a lot of aspects you're not taking into account - the biggest being that an M50 is a 24v DOHC. Meaning, I have 2 valves to shove air through on the intake side per cylinder, and 2 valves to exhaust through, more air flow = more power. Cereal has 1 valve in 1 valve out. Additionally, I have 244/244 cam profile while I am pretty sure his is much less aggressive.

[Espen]

The ammount of air pr min is not important in my example where both car had the same boos pressure.
About 24v vs 12 I agree with you, but the 12v have 1 big valve, where the 24v have 2 smaller.

What i tried to say where, a bigger displacement will always produce more power, when you put the same amount of money in it.

Lets stop that discussion, i think we both agree that turbo is fun. I have my own turbo project goin on my old Volvo.

[Jon K]

The ammount of air pr min is not important in my example where both car had the same boos pressure.
About 24v vs 12 I agree with you, but the 12v have 1 big valve, where the 24v have 2 smaller.

What i tried to say where, a bigger displacement will always produce more power, when you put the same amount of money in it.

Lets stop that discussion, i think we both agree that turbo is fun. I have my own turbo project goin on my old Volvo.

Thats fine - I know my car is fast on this low boost of 9.5 psi. I smoke the 535i turbo and his buddy just told ya! Wait until I have my 8.3:1 motor built for 22 - 25 psi :P

[GoldenOne]

Thats fine - I know my car is fast on this low boost of 9.5 psi. I smoke the 535i turbo and his buddy just told ya! Wait until I have my 8.3:1 motor built for 22 - 25 psi :P

hmmm...thats going to be pretty powerful...what are you planning to do to the m50 engine to get 8.3:1??

[Booster]

Looking good JK.I think the slipping clutch issue would only delay your mapping efforts to get them clean ? Heck....even installing an automatic would pacify the tuning efforts up to their shifting points. I guess you could manually hold position and simulate rpm points ?
I can't imagine a stock tranny living too lonf above 350 hp hammering...but then, your not concerned with that,right ?
I always loved my builds with a loud exahaust at first, but then I always ended up toneing them down a little more stealthy later on....think you will ?
...............Vinny

[Jon K]

Looking good JK.I think the slipping clutch issue would only delay your mapping efforts to get them clean ? Heck....even installing an automatic would pacify the tuning efforts up to their shifting points. I guess you could manually hold position and simulate rpm points ?
I can't imagine a stock tranny living too lonf above 350 hp hammering...but then, your not concerned with that,right ?
I always loved my builds with a loud exahaust at first, but then I always ended up toneing them down a little more stealthy later on....think you will ?
...............Vinny

The stock trans is able to support 500+ whp supposedly. Heh, this is quieted down... you should have heard it open down pipe