Stroker build

[SYT_Shadow]

Originally Posted by Redd

I'd be interested to see if it's possible to get 292s working with stock 4.0 internals, injectors and ECU.

It 100% is.

We changed injectors for the third stroker to see if the stock ones were a limitation of some kind. They were not, so that was a waste of time

The 292 cams do not need any internal changes, they work perfectly with stock pistons etc

[pbonsalb]

I am impressed by the two M4 GTS! Serious business, but probably the more durable way to go for hardcore track use.

[alfalfa]

Originally Posted by SYT_Shadow

It 100% is.

We changed injectors for the third stroker to see if the stock ones were a limitation of some kind. They were not, so that was a waste of time

I did some calculations for my stroker build and in that hp range you are the stock injectors are maxed out.
So going to bigger injectors was a good choice from you to be on the safe side.
For 292 cams it's not necessary.

[reidetailing]

Originally Posted by SYT_Shadow

The same tuner who currently tuned my stroker. For sure. If we do 292s eventually then he'll do the 4.0

Who is your current tuner?

[SYT_Shadow]

Originally Posted by reidetailing

Who is your current tuner?

He does not have an online presence. He just does S65 stuff

[Richbot]

Is Steve still doing a 4.2?

[SYT_Shadow]

Originally Posted by Richbot

Is Steve still doing a 4.2?

I think so. A guy who told me rod bearings were a myth shortly before losing his engine got the 4.2.

Basically, you can use the stock crank and bore out the engine and get to 4.2
Another option is to not bore it out and change the stroke with a new crank, like the GTS engine. Then you get to 4.4
Combine both and you're at 4.6. Do dry oil sump and you can use a super short piston without an oil scraper ring that gets you to 4.7.

It's likely the 4.4 is the most durable option

[Richbot]

Yeah the bore spacing does seem pretty cozy, and it seems like stock cylinder walls are pretty damn durable Just curious if that setup was still worthy of the Carbahn seal of approval

[CSBM5]

Originally Posted by Richbot

Is Steve still doing a 4.2?

https://carbahnautoworks.com/product...ngine-rebuild/

[Richbot]

I have learned over the years that tuner websites are often not as fresh as the knowledge of people who have just spent money with said tuners

[Green-Eggs]

Originally Posted by SYT_Shadow

I think so. A guy who told me rod bearings were a myth shortly before losing his engine got the 4.2.

There's a few of those guys around here...or should I say "formerly" around here because once their motor blows after being so vocal in disbelief of a clearance issue, they tend to leave the forums. I can think of three of them, but can only remember two of their screen names.

[omgzirra_exe]

Originally Posted by SYT_Shadow

I think so. A guy who told me rod bearings were a myth shortly before losing his engine got the 4.2.

Basically, you can use the stock crank and bore out the engine and get to 4.2
Another option is to not bore it out and change the stroke with a new crank, like the GTS engine. Then you get to 4.4
Combine both and you're at 4.6. Do dry oil sump and you can use a super short piston without an oil scraper ring that gets you to 4.7.

It's likely the 4.4 is the most durable option

i feel like i know that guy :^)

4.4L > superior stroker

[E92Fever]

Idk why these motors are so fickle

[SYT_Shadow]

Originally Posted by E92Fever

Idk why these motors are so fickle

I don't find them to be fickle at all. I've done hundreds and hundreds of track days on mine.

In the track subforum we have people who are supercharged to 50% more power and have hundreds of track days on their stock engines.

I've been to a massive number of track days and what I see is that the M3 is the most reliable car out there.

[E92Fever]

Coming from the Evo and LS community… I've built 2 6.0s with very little care and they have made well over 800hp.. all under 7k..

Sucks to read some lone spending tons of money and not getting results.

[e46e92love]

Originally Posted by Green-Eggs

There's a few of those guys around here...or should I say "formerly" around here because once their motor blows after being so vocal in disbelief of a clearance issue, they tend to leave the forums. I can think of three of them, but can only remember two of their screen names.

Owner of two S65s, both 100k, neither any bearing issues.

Ask the Ferrari guys what happens to a high revving V8 when you don't use her…..there is a reason why the guys who use the oil recommended by BMW, warm up procedures recommended by BMW, and drive her all the time rather than letting her sit rarely have problems.

But what does BMW know, all she did was build an engine that revs to 8400 and can easily go 100k miles with no major work and a DOCUMENTED less than 1% fail rate—-easy stuff that anyone can do🙄…..Ford and GM are only 10 years behind…..

Cheers,
e46e92

[e46e92love]

Originally Posted by E92Fever

Coming from the Evo and LS community… I've built 2 6.0s with very little care and they have made well over 800hp.. all under 7k..

Sucks to read some lone spending tons of money and not getting results.

This sums up why I and many others who were active and help build these forums back in 2006 have left this place……would love to understand the joy some people get from attacking / name calling strangers they don't know simply because they have differing opinions on what is and isn't fun and worth the money.

Cheers,
e46e92

[pumper206]

I would like to renew this post by asking the question, “If going the stroker route, why not just source an S65B44 (GTS Motor) instead? This thought is assuming that because the motor is built from BMW, reliability issues shouldn’t be an issue. Thoughts?

[SYT_Shadow]

Originally Posted by pumper206

I would like to renew this post by asking the question, “If going the stroker route, why not just source an S65B44 (GTS Motor) instead? This thought is assuming that because the motor is built from BMW, reliability issues shouldn’t be an issue. Thoughts?

That would probably work.

In the basement we have the Crank and rods to build a 4.4 stroker, one day we may do that to our other e9x. Two strokers!

The 4.6L stroker is still running strong!

[omgzirra_exe]

Originally Posted by SYT_Shadow

That would probably work.

In the basement we have the Crank and rods to build a 4.4 stroker, one day we may do that to our other e9x. Two strokers!

The 4.6L stroker is still running strong!

my 4.4L is still going strong as a dual-duty motor as well!

cant go wrong with either.

[pumper206]

Originally Posted by SYT_Shadow

That would probably work.

In the basement we have the Crank and rods to build a 4.4 stroker, one day we may do that to our other e9x. Two strokers!

The 4.6L stroker is still running strong!

That’s wassup. 👍

[Green-Eggs]

Originally Posted by pumper206

I would like to renew this post by asking the question, “If going the stroker route, why not just source an S65B44 (GTS Motor) instead? This thought is assuming that because the motor is built from BMW, reliability issues shouldn’t be an issue. Thoughts?

When the GTS was first introduced, you could only get replacement motor parts from BMW by providing a VIN to prove you owned a GTS. I have no idea if that still applies today. So, you might want to check.