how much power can my bottom end handle?

[vr41mpg]

Hey I've got a freshly rebuilt 2.0L 6 bolt block with 1g rods and 2g pistons. Its got an oem crank ground 10/10 that was cryo treated. ACL Trimetal race bearings, ARP hardware everywhere. All new OEM timing and oil accessories, new OEM crank pulley and a balanced rotating assembly. Mitsu 4 layer HG. new mitsu gasket kit.

The time is coming to upgrade my current 16g turbo. Eventually, I want to run a twin scroll T4 HTA86, but my current setup (not only my bottom end) isn't necessarily ready for that - particularly because I want a stroker if I am going to have a turbo that large, but I want to use my current bottom end for a while. So I was thinking that I would get a cheaper, smaller twin scroll turbo such as th Bw s256, and also save about $1,200 for now. One benefit would be I can get a T4 divided exhaust manifold that I can use with both the s256 and the HTA86 later down the road.

So I've done some reading about the BW S256 and it seems that it likes to live at 30psi. Would you guys feel comfortable running an s256 at 30psi on 93 pump on the bottom end that I have? I use my car as a part-time daily driver and I never launch the car. It won't see a drag strip. The only time I really ever even go WOT is on a highway entrance ramp.

I tried to include all relative important information. Please don't tell me to just go with a single scroll t3 or whatever setup you recommend. I have a well thought out plan of what I want the car to be when its all said and done (2.2L with the HTA86), but my 16g is not in the best of shape and I don't want to just replace it. This way, I can get the exhaust manifold and dual wastegates that will be in my final build, and save the $1,200 on the turbo for the time being.

 

[92AWDHX40]

Well what are your goals, how is it tuned stock is around 300 if not more, tune it so its safe using your mods, and such, no exact number.

 

[94allwheeldsm]

I have heard of people running up to 600 on the stock crank. As for the Rods most people say about 400 hp depending on boost levels and how much abuse it takes, but I have never had any personal experience in high horsepower, stock internals.

 

[XiKeiyaZI]

The stock 6 bolt crank has handled well over 600hp many a time. I usually wouldn't push 6 bolt rods further than 450. 7 bolts more than 400. That's just me and using the common hp level-lines. People have ran more without issue and some have ran less and produced bent rods. It depends a lot on the tune and boost levels -keeping knock low, flow good, and not revving to the moon 24/7. Proper upkeep and engine condition play a huge role. Trying to get power from an engine with a compression of 80-100-82-111 is going to be a treat.

 

[AwD4g63TsI]

I don't recall who it was on here that just set the stock 7 bolt record...but he managed a 10.2 with 600+ hp. That's all stock bottom end using nothing but ARP's as I mentioned, on a 7 bolt. You're 6 bolt rods should handle that and some more. It's all about the tune however and knock, as always, will be your enemy.

 

[EclipseOwner95]

I actually dyno'd my car yesterday. Stock 6 bolt block, HTA DSM86 bolt on turbo, E85, and a conservative tune and put down 508whp on 32psi. Still got more in her haha.

I feel like I could make near 550 and it last for a while. We rebuilt mine a little bit looser than factory so I have faith that it will hold up. WG Line popped off in the middle of a 4th gear pull and spiked 43psi @ 6000rpm and she didn't miss a beat, thats gotta count for something haha.

 

[ys0blupandab3ar]

I wouldnt push a fresh bottem end past 450hp, the 6 bolt crank tho 600hp.

 

[TSITurbo95]

Alot of misinformation in this thread. . .

No one can answer your question how much power your bottom end can handle. It has ALOT of different factors that play in effect. Tune, how well the motor was rebuilt, clearances, etc. You build a motor around your goals. People have gone 600+ hp on a stock 6 bolt. I have a buddy who made over 950hp on a stock 6 bolt crank.

Also the stock 7 bolt record, I am pretty sure Cory Bowers (EvilTSI) still holds this record.

 

[little-razcal]

Alot of misinformation in this thread. . .

No one can answer your question how much power your bottom end can handle. It has ALOT of different factors that play in effect. Tune, how well the motor was rebuilt, clearances, etc. You build a motor around your goals. People have gone 600+ hp on a stock 6 bolt. I have a buddy who made over 950hp on a stock 6 bolt crank.

Also the stock 7 bolt record, I am pretty sure Cory Bowers (EvilTSI) still holds this record.

Your correct Ryan. It's still Corey Bowers with a 10.1 @ 142 I believe.. Will Staton is next in line with his 10.3 @ 137ish..

And yes...a LOT of misleading info in this thread..Stock cranks good to 1000+HP plus...They laugh at you at 600whp. I run a cut crank and I'm sure I'm near 700 at the crank, and there are people making way more power than me.

The stock motor can handle a lot if tuned correctly. Ostar was well over 600whp with his 6 bolt, though I'm sure there aren't to many people that can tune a stock motor to stay together for too long at that power level.

 

[1g-awd-talon]

There is really no right answer to this. I've seen people break stuff at 300 and I've send stuff in the 600 range. Every car is going to be different. Just like every care needs a slightly different tune.

 

[dexterholland04]

Your correct Ryan. It's still Corey Bowers with a 10.1 @ 142 I believe.. Will Staton is next in line with his 10.3 @ 137ish..

And yes...a LOT of misleading info in this thread..Stock cranks good to 1000+HP plus...They laugh at you at 600whp. I run a cut crank and I'm sure I'm near 700 at the crank, and there are people making way more power than me.

The stock motor can handle a lot if tuned correctly. Ostar was well over 600whp with his 6 bolt, though I'm sure there aren't to many people that can tune a stock motor to stay together for too long at that power level.

Adam, you got it all dead-on!

 

[crazytsiawd]

shep was running a stock crank for the longest time, it's the last thing id worry about it.

 

[white92talontsi]

Throw a set of ARP rod bolts in the stock 6 bolt rods and if the tune is good then you can push 6-700hp.

It is all in the tune,the ARP Rod bolts and common sense.

 

[JusMX141]

It will make as much power as it can right before it breaks. That's the correct answer.

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