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-   -   b20 vtec on boost (https://www.homemadeturbo.com/forced-induction-7/b20-vtec-boost-24075/)

td-civ 07-29-2004 01:08 AM
b20 vtec on boost
 
how much boost can a b20 vtec with piston and rods and a block guard hold

HMT-Admin 07-29-2004 01:14 AM
Re:b20 vtec on boost
 
8-10psi tops.. tuned perfectly and a weak timing map.


https://www.homemadeturbo.com/ride/89si2/dead2.jpg

https://www.homemadeturbo.com/ride/89si2/dead3.jpg


no need to put a block guard in, b20 sleeves crack from the inside out. Monolithic desinged sleeves are the weakest b-series sleeves. This b20 block was pinned and cracked sleeves at 12 psi on a 4th gear pull.

Jeff

88dx 07-29-2004 01:31 AM
Re:b20 vtec on boost
 
12 psi on a 4th gear pull.
I wonder why? :-X

td-civ 07-29-2004 01:44 AM
Re:b20 vtec on boost
 
im using total seal rings and je pistons it wont do that

88dx 07-29-2004 01:51 AM
Re:b20 vtec on boost
 
Originally Posted by td-civ
im using total seal rings and je pistons it wont do that
nope ::)

td-civ 07-29-2004 01:56 AM
Re:b20 vtec on boost
 
i was told that i can run 15psi when i race and 8 on the street i just want to know if that i can or not

Donald125 07-29-2004 03:02 AM
Re:b20 vtec on boost
 
Originally Posted by td-civ
im using total seal rings and je pistons it wont do that
??? ::)

quadnie 07-29-2004 07:01 AM
Re:b20 vtec on boost
 
The monolith was that large black thing that all the monkeys were worshipping in 2001: Space Odyssey

td-civ 08-09-2004 02:13 AM
Re:b20 vtec on boost
 
Originally Posted by AbaZ
8-10psi tops.. tuned perfectly and a weak timing map.
did it have a block guard in it

AgentMurdoc 08-09-2004 03:50 AM
Re:b20 vtec on boost
 
Originally Posted by td-civ
Originally Posted by AbaZ
8-10psi tops.. tuned perfectly and a weak timing map.
did it have a block guard in it
no need to put a block guard in, b20 sleeves crack from the inside out
In my opinion b20 blocks suck balls for turbo, I prefer an LS block.

im using total seal rings and je pistons it wont do that
How is that going to protect the sleeves from being so damn weak? ???

SkunT 08-09-2004 11:13 AM
Re:b20 vtec on boost
 
as I Have learned. a b20 is nothing more than a bored B18. so you have paper thin cyl. walls. so no. I wouldnt run high boost. maybe 6psi at most.

HMT-Admin 08-09-2004 04:08 PM
Re:b20 vtec on boost
 
Originally Posted by td-civ
i was told that i can run 15psi when i race and 8 on the street i just want to know if that i can or not
maybe you didnt understand my post. B20 sleeves are monolithic design, 1 peice, any type of detonation the sleeves will crack from the inside out. So reguardless if you have forged pistons, big rods and a nice block guard the sleeves will crack. I had 12pins supporting my sleeves (called pin/post method) which is better than blockguards and it didnt even help. You can run about 8-10psi safely on a b20 with a conservitive timing map.

Trust me I know lots of guys who have broke sleeves in b20's. Its quite common for them to fail with fi applications.

jeff

HMT-Admin 08-09-2004 04:11 PM
Re:b20 vtec on boost
 
Originally Posted by sccaeg
as I Have learned. a b20 is nothing more than a bored B18. so you have paper thin cyl. walls. so no. I wouldnt run high boost. maybe 6psi at most.


b20 and b18 sleeves are nothing alike, b20's actually have very thick sleeves, but due to the weak design they are brittle as hell and crack.

XDEep 08-14-2004 12:33 AM
Re:b20 vtec on boost
 
READ http://dwolsten.tripod.com/articles/jan96a.html
then obviously the tons of people with cracked sleeves.


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