Author Topic: Turbo M42 Questions (Read 34009 times)

Ryann · « **Reply #45 on:** April 23, 2010, 10:56:45 AM »

THANK YOU rob_e30.

Oh, and for the record what's your CR? I'd guess 7-7.5:1.

bmwconnect · « **Reply #46 on:** April 25, 2010, 10:46:02 AM »

made some pulls on 15psi today at 91octane and 21degs advance timing and basically slick tires
http://www.youtube.com/watch?v=tN-mR6P0MWc
http://www.youtube.com/watch?v=M38uEQetPKU

BlueBMW · « **Reply #47 on:** April 25, 2010, 10:53:04 AM »

I want a turbo

bmwconnect · « **Reply #48 on:** April 25, 2010, 11:06:33 AM »

Quote from: BlueBMW;91421

I want a turbo

hehe ya it's purity fun. I eat 300hp mustangs no problems and they all think I'm running a 6cyl turbo lol

Ryann · « **Reply #49 on:** April 25, 2010, 11:22:52 AM »

Cool dude. Your car is obviously really quick, a huge improvement over stock. Based on your car's curb weight and 0-60 time compared to similar data I found on the web you're likely somewhere around 190hp.

My estimate was based on your 0-60 time of 7 seconds @ 2900 lbs.
A comparison would be the RWD Lexus IS 300 @217 HP and 3255lbs with a 0-60 time around 7.5 secs.

bmwconnect · « **Reply #50 on:** April 25, 2010, 11:30:54 AM »

Quote from: Ryann;91424

Cool dude. Your car is obviously really quick, a huge improvement over stock. Based on your car's curb weight and 0-60 time compared to similar data I found on the web you're likely somewhere around 190hp.

My estimate was based on your 0-60 time of 7 seconds @ 2900 lbs.
A comparison would be the RWD Lexus IS 300 @217 HP and 3255lbs with a 0-60 time around 7.5 secs.

I don't know where you are getting numbers from but you are very wrong lol. 15psi on the m42 will make at least 300crank hp without a doubt

you have a lot to learn so start by reading this http://www.amazon.com/Maximum-Boost-Turbocharger-Engineering-Performance/dp/0837601606

Ryann · « **Reply #51 on:** April 25, 2010, 05:13:40 PM »

I don't doubt that the M42 could make 400hp+, but it wouldn't be using a stock head, manifolds, internals, OR pump gas! THAT is my point.

How can you possibly provide a "good tune" via software without access to a dyno? Seems like to tune your setup at all you'd have already had your car on the dyno.

bmwconnect · « **Reply #52 on:** April 25, 2010, 05:52:13 PM »

Quote from: Ryann;91450

I don't doubt that the M42 could make 400hp+, but it wouldn't be using a stock head, manifolds, internals, OR pump gas! THAT is my point.

How can you possibly provide a "good tune" via software without access to a dyno? Seems like to tune your setup at all you'd have already had your car on the dyno.

wow you realy are out of the loop lol. This motor could easly make 400hp on the stock manifold, stock head and a set of stronger pistons on pump gas.

You do not need a dyno to tune a car well. You need a wideband, knock listening tools and a big open parking lot.

I see you have alot to learn still.

Ryann · « **Reply #53 on:** April 25, 2010, 06:06:03 PM »

Okay, so let's say "I have a lot to learn". Talk is cheap, and this could go back and forth forever. Since you're the turbo expert and have a setup in your car that is putting down "300HP+" using stock parts, PROVE IT!!

I realize that I haven't read your How to Turbocharge an Engine book, but I have messed around with and read about turbocharged cars extensively. My guess is that you're 100HP enthusiastic, and that running 15 psi into a 10:1CR engine using pump fuel isn't going to last. Start with the HP.

bmwconnect · « **Reply #54 on:** April 25, 2010, 06:26:00 PM »

Quote from: Ryann;91452

Okay, so let's say "I have a lot to learn". Talk is cheap, and this could go back and forth forever. Since you're the turbo expert and have a setup in your car that is putting down "300HP+" using stock parts, PROVE IT!!

I realize that I haven't read your How to Turbocharge an Engine book, but I have messed around with and read about turbocharged cars extensively. My guess is that you're 100HP enthusiastic, and that running 15 psi into a 10:1CR engine using pump fuel isn't going to last. Start with the HP.

you are a waste of my time.

SpecFC · « **Reply #55 on:** April 25, 2010, 07:43:59 PM »

Ever heard of Water injection? That'll get you 400 on pump.

bmwconnect · « **Reply #56 on:** April 25, 2010, 08:44:12 PM »

Quote from: SpecFC;91457

Ever heard of Water injection? That'll get you 400 on pump.

Agreed!!

rob_e30 · « **Reply #57 on:** April 25, 2010, 11:16:54 PM »

Water injection does not make power, it cools the intake charge which reduces detonation and allows you to add more timing.

It's easy to put this discussion to bed and prove you are correct... post some dyno sheets.

bmwconnect · « **Reply #58 on:** April 26, 2010, 08:30:20 AM »

Quote from: rob_e30;91464

Water injection does not make power, it cools the intake charge which reduces detonation and allows you to add more timing.

It's easy to put this discussion to bed and prove you are correct... post some dyno sheets.

It not only cools but effectively increases fuel octane. Another thing to note is that when I'm doing hard pulls and I stop to check my piping after the inter cooler is very very cool to the touch so at this point im not worried about detonation to much. when I increase to 18psi it maybe a different story though. I'm just waiting on some colder spark plugs and then I will play somewhere

The dyno is not a priority for me because I'm trying to blow this up but and I want to see how far I can get on stock internals. Also there is only one dyno in this city and its all-ways booked way in advance

bmwconnect · « **Reply #59 on:** April 26, 2010, 12:52:50 PM »

got my colder plugs today. did some 18psi pulls and now my 36LB injectors are at 100% duty cycle. I heard some detonation on the highway under heavy load and backed the timing -2degs and it was fine after.

Car is a rocket and can easily take on some super cars. that is all!