Just had a quick question I know its been gone over time and time again but I cant seem to find a solid answer. If I put eagle rods, je low comp pistons, arp rod bolts, and arp head studs with a vtec head. How much boost can the engine handle running a Garret T3/T04 turbo? Is it better to run a block guard or will it just restrict cooling? If I get sleeves and they are bored to 85mm how much boost can I handle then? Just trying to decide as my blockguarded b20/vtec blew up on 12psi which is believed to be from a faulty water pump. Trying to decide whether to go b20/vtec or a ls/vtec and continue boosting.

Thanks

 

b20 sleeves are weak
ls sleeves are designed differnet have seem many 400-500 stock block (aftermarket rods/pistons) run on the street all the time, b20 sleeves brake on low 200s, thats my opinion.

i would stick to the LS its the better bet for you,

good luck
dan

 

i have done quite alot of research into this as well. and havent found any solid answers. mostly just things being repeated from what others have read.
i am about to find out the limits of a stock b20b block. well, it has a block girdle, gsr pickup, oil pump, and water pump. with a b16 head that has skunk2 springs, and retainers, and gsr cams. tubular manifold, & turbonetics ballbearing 60-1. it will be tuned hopefully next weekend with aem ems. it will be a conservitive tune at first until i get my other block built. but once thats done, the boost will go up.....

 

Does anyone have a sleeved b20 block? The cylinder walls would still be the same thickness but how much boost can you hold then? Or maybe a better question is what is an ideal bore size for boost or does it even matter once sleeved?

Thanks

 

sleeves make a world of difference not only did they change design but also change material used in b20 (this is diff then all the other b series) which makes it weaker for boost. If you sleeve a b20, u would be good to thats the only issue with the b20, but if u only want to make 500 or less i would say LS stock sleeves, i made 500 all year, no problems with sleeves (stock sleeves/b16) just to give you an idea, but i will be building a sleeves ls/vtec sooner or later (whenever i just find the extra 5k or so)

good luck
d
PS i just sold my build b20 becuase i did not feel confident in the sleeves as well

 

i was disputeing the hp numbers for a stock sleeved b20 block. we all know the sleeves have a bad design. but i havent found anyone who actually has pushed them to there limits on a great tune.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 2redstars &raquo;</TD></TR><TR><TD CLASS="quote">i was disputeing the hp numbers for a stock sleeved b20 block. we all know the sleeves have a bad design. but i havent found anyone who actually has pushed them to there limits on a great tune. </TD></TR></TABLE>

Just because somebody else pushed theirs to X amount of power doesn't mean that's the limit for everybody's B20. It's also not going to change the horrible sleeve design. My B20 lasted for a while, but I finally cracked the sleeves, wasn't really suprised, at least it was fun while it lasted. Time for the new setup!

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by scB20teg &raquo;</TD></TR><TR><TD CLASS="quote">

Just because somebody else pushed theirs to X amount of power doesn't mean that's the limit for everybody's B20. It's also not going to change the horrible sleeve design. My B20 lasted for a while, but I finally cracked the sleeves, wasn't really suprised, at least it was fun while it lasted. Time for the new setup!</TD></TR></TABLE>

I am curious, what kind of torture did your b20 go thru before she goes? I Currently have mine for 2 yrs. and it my daily driver, and I rev it up 6grand almost every day for fun driving...I love the tq. That the engine produces and power at all rpms...but I am very conservative with the motor.

 

go ls/vtec