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General Question: What is the HP limit of a B18 Sleeve in this day and age?

General Question: What is the HP limit of a B18 Sleeve in this day and age?

 
Old 01-23-2019, 06:30 AM
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USA
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Default General Question: What is the HP limit of a B18 Sleeve in this day and age?

I just want to know the stock sleeve hp limit for a b18 im NOT GETTING MY BLOCK SLEEVED so I dont want this to turn into a "just get your block sleeved" arguement.
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Old 01-23-2019, 07:57 AM
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Default re: General Question: What is the HP limit of a B18 Sleeve in this day and age?

Do not take the car over 320whp-360whp (We understand dynomometers do read differently, so this is a general rule). This measurement is based upon power to the wheels, and not the crankshaft. If you plan to go higher than that, there are other alternatives like the CSS CNC WERX (up to 500whp) and then sleeving is required.
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Old 01-23-2019, 08:21 AM
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Default re: General Question: What is the HP limit of a B18 Sleeve in this day and age?

Originally Posted by TheShodan View Post
Do not take the car over 320whp-360whp (We understand dynomometers do read differently, so this is a general rule). This measurement is based upon power to the wheels, and not the crankshaft. If you plan to go higher than that, there are other alternatives like the CSS CNC WERX (up to 500whp) and then sleeving is required.
CSS blocks are now doing 1100hp plus on some builds, they rate them for 700 plus now
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Old 01-23-2019, 08:48 AM
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Default re: General Question: What is the HP limit of a B18 Sleeve in this day and age?

Originally Posted by TheShodan View Post
Do not take the car over 320whp-360whp (We understand dynomometers do read differently, so this is a general rule). This measurement is based upon power to the wheels, and not the crankshaft. If you plan to go higher than that, there are other alternatives like the CSS CNC WERX (up to 500whp) and then sleeving is required.
Originally Posted by turboLScrx View Post


CSS blocks are now doing 1100hp plus on some builds, they rate them for 700 plus now
Just as a footnote for anyone that may read this in the future, B20 blocks are not benefited nearly as much from the CSS guard as B16 or B18 blocks are, due to the siamese cylinder liner between #2 and #3. The CSS process can't do anything about that weak link.

It's also important to bore a cylinder after getting the CSS process completed, which puts that thin middle sleeve into even more jeopardy. It's fine for a N/A build, but I wouldn't go that route for FI (with the B20).
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Old 01-23-2019, 09:55 AM
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Default re: General Question: What is the HP limit of a B18 Sleeve in this day and age?

Originally Posted by USA View Post
I just want to know the stock sleeve hp limit for a b18 im NOT GETTING MY BLOCK SLEEVED so I dont want this to turn into a "just get your block sleeved" arguement.
It really depends how much of lag you can withstand. Bigger turbo will make more hp with less efford. Water methanol injection helps a LOT.
If your using a divided s366sx with a divided top mount on water methanol injection id say 500whp maybe 600.
If your using a GT2871 28 PSI on a mini ram on 91octane youll crack it on 350whp .
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Old 01-23-2019, 12:00 PM
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Default re: General Question: What is the HP limit of a B18 Sleeve in this day and age?

With a blockguard you can make more than 500 I have seen plenty cars on 500++ on dynapack.
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Old 01-23-2019, 12:01 PM
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Default re: General Question: What is the HP limit of a B18 Sleeve in this day and age?

Originally Posted by Balor_Gr View Post
It really depends how much of lag you can withstand. Bigger turbo will make more hp with less efford. Water methanol injection helps a LOT.
If your using a divided s366sx with a divided top mount on water methanol injection id say 500whp maybe 600.
If your using a GT2871 28 PSI on a mini ram on 91octane youll crack it on 350whp .
b18 with 2871 at 28 psi??????350???come on bro....
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Old 01-23-2019, 01:25 PM
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Default re: General Question: What is the HP limit of a B18 Sleeve in this day and age?

Originally Posted by fotis2000 View Post


b18 with 2871 at 28 psi??????350???come on bro....
He said it'll crack at 350, he didn't say that's ALL that would make...
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Old 01-23-2019, 02:51 PM
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Default re: General Question: What is the HP limit of a B18 Sleeve in this day and age?

Originally Posted by turboLScrx View Post


CSS blocks are now doing 1100hp plus on some builds, they rate them for 700 plus now
Those that know my position are aware of why I don't subscribe to that amount of power reliably or repeatedly. I'll leave it at that. This was about the stock block.
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Old 01-23-2019, 03:43 PM
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Default Re: B18 Sleeves HP limit

Originally Posted by TheShodan View Post
Those that know my position are aware of why I don't subscribe to that amount of power reliably or repeatedly. I'll leave it at that. This was about the stock block.
no doubt, and I agree around the 300-350 range (tuned properly) is a good stopping point for a street car on stock/unmodified sleeves. Any high output motor will be limited in life
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Old 01-24-2019, 04:00 AM
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Default Re: General Question: What is the HP limit of a B18 Sleeve in this day and age?

400whp going on 10K miles with the build so far.... stock sleeves, forged internals.

Good tune and E85 helps.
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