Max Power on SR20 block without Sleeving ? - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

Rb26kouki · 01-14-2020, 09:43 AM

What is the most power you have made on a SR20 block without sleeving ? & for how long?

Mazworx says 400 which is BS

I personally seen 730whp @ 35psi @87mm bore

I heard some people in Australia have done 800hp without sleeves

RalliartRsX · 01-14-2020, 09:54 AM

WHP?? I think 650 or so at the wheels before the sleeves start ovalling if its 87mm and above. 86 I am not sure about (not many virgin blocks around anymore it seems

)

Dboyizmlg · 01-14-2020, 10:01 AM

Quote:

Originally Posted by Rb26kouki

What is the most power you have made on a SR20 block without sleeving ? & for how long?

Mazworx says 400 which is BS

I personally seen 730whp @ 35psi @87mm bore

I heard some people in Australia have done 800hp without sleeves

This is a subject you will get different answers to. Mazworx prob say that to be my n the conservative side. It all depends on how much the motor is abused and used

jr_ss · 01-14-2020, 12:09 PM

The block starts to distort around the 600whp mark. Obviously, there are factors that can effect this. However, it’s safe to say that over 600whp, you need sleeves in order to keep it together.

jedi03 · 01-15-2020, 02:16 PM

buddy had completely stock internals minus cams and ran ~600 for years...was horsebeat after he sold it but still lasted another 2 years, dunno if the new owner pushed more or not...

01-14-2020, 09:43 AM	#1
Rb26kouki Zilvia FREAK! Join Date: Apr 2012 Location: Commerce Age: 29 Posts: 1,456 Trader Rating: (62) Feedback Score: 62 reviews	Max Power on SR20 block without Sleeving ? What is the most power you have made on a SR20 block without sleeving ? & for how long? Mazworx says 400 which is BS I personally seen 730whp @ 35psi @87mm bore I heard some people in Australia have done 800hp without sleeves

01-14-2020, 12:09 PM	#4
jr_ss Post Whore! Join Date: Dec 2005 Location: Pa Posts: 6,056 Trader Rating: (34) Feedback Score: 34 reviews	The block starts to distort around the 600whp mark. Obviously, there are factors that can effect this. However, it’s safe to say that over 600whp, you need sleeves in order to keep it together. __________________ My SR20VET

Thread Tools
Show Printable Version Email this Page
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode

01-14-2020, 09:54 AM	#2
RalliartRsX Post Whore! Join Date: Apr 2006 Location: Maryland Posts: 4,753 Trader Rating: (32) Feedback Score: 32 reviews	WHP?? I think 650 or so at the wheels before the sleeves start ovalling if its 87mm and above. 86 I am not sure about (not many virgin blocks around anymore it seems )

01-15-2020, 02:16 PM	#5
jedi03 Nissanaholic! Join Date: Jul 2008 Location: albuquerque Posts: 1,786 Trader Rating: (8) Feedback Score: 8 reviews	buddy had completely stock internals minus cams and ran ~600 for years...was horsebeat after he sold it but still lasted another 2 years, dunno if the new owner pushed more or not...