redDAinteg

right now i have an LS motor with 403 cams,but the motor is pretty much dead due to such high mileage and the compression numbers are pretty low now(160 across). So i was thinking of buying a b20b from HMO and dropping my 403s in it and then boosting. I have my entire kit ready, but just dont want to put it on my car right now as the motor is old and worn out. the turbo is a t3/to4e 57trim with a .63. My wastegate is set at .5bar. I just want to run 7-8psi on the b20b, will it hold up for daily driving? I know the cylinder walls are weaker than other bseries, but i just want input on low boosted b20bs. I plan on running 220-250whp MAX with a FAT powerband. I would really prefer buying a b20b over another LS. all input welcome!

drintegra

my friend is currently running b20 with t3/t4 and it is pretty good. The walls are weaker but there are plenty of people boosting them over 12psi. As long as the tune is conservative and you take care of it 7-8psi should be pretty good. Good luck

AbitAvenger

As long as you run strictly 93 on a good tune it should be fine considering there are others pushing them farther.

JDMs1eeper

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by redDAinteg &raquo;</TD></TR><TR><TD CLASS="quote">right now i have an LS motor with 403 cams,but the motor is pretty much dead due to such high mileage and the compression numbers are pretty low now(160 across). So i was thinking of buying a b20b from HMO and dropping my 403s in it and then boosting. I have my entire kit ready, but just dont want to put it on my car right now as the motor is old and worn out. the turbo is a t3/to4e 57trim with a .63. My wastegate is set at .5bar. I just want to run 7-8psi on the b20b, will it hold up for daily driving? I know the cylinder walls are weaker than other bseries, but i just want input on low boosted b20bs. I plan on running 220-250whp MAX with a FAT powerband. I would really prefer buying a b20b over another LS. all input welcome!</TD></TR></TABLE>

If you have 160 across thats GOOD.

You said your LS has 403's (wich will bleed cylinder pressure and make it pull less vac. also)

but to answer your question, B20's a GREAT motors. People break them due to a shitty tune.

Back in 2003 I had a B20b on 10psi w/ FMU setup for almost a year. Before that I sprayed the motor on a 75-100shot for 3 years, beating it up every weekend at the track in 2 differnt cars. It was boosted twice also, but finaly the "TRANNY" broke before the motor, the motor still runs great and is in my friends car NA.


Also, local friend started boosting his B20 swap when i boosted mine back in 03'. He's still boosted w/ the same motor today. He's tuned to 18psi on hondata i believe.

D16SohcVtec

I don't see why not, with a good tune you will be fine.

beerbongskickass

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by JDMs1eeper &raquo;</TD></TR><TR><TD CLASS="quote">B20's a GREAT motors. People break them due to a shitty tune.</TD></TR></TABLE>

I was going to stay out of this thread until I read that. Dude your completely wrong. B20 motors are worthless and the sleeve design makes them very weak. The sleeves crack easily even if tuned well.

Here's a little info on them... http://dwolsten.tripod.com/articles/jan96a.html

Search archived posts and you will find plenty of info to back up why I say B20's suck. I would just get another LS, you will be better off in the long run. The extra 0.2 displacement of the B20 is not worth it.

JDMs1eeper

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by beerbongskickass &raquo;</TD></TR><TR><TD CLASS="quote">I was going to stay out of this thread until I read that. Dude your completely wrong. B20 motors are worthless and the sleeve design makes them very weak. The sleeves crack easily even if tuned well.

Here's a little info on them... http://dwolsten.tripod.com/articles/jan96a.html

Search archived posts and you will find plenty of info to back up why I say B20's suck. I would just get another LS, you will be better off in the long run. The extra 0.2 displacement of the B20 is not worth it.</TD></TR></TABLE>

I'm not going on here-say, I'm going on my personal experience and experience of my friends.

I even have a friend w/ a CRVtec w/ 11:1 compression that has been using a 150shot for 2 race seasons w/ stock sleeves.

I know they have a design flaw, but if you can make a completely STOCK b16 make 630whp and LAST the dyno run, then any decent tunner can make a b20 last on the average boost levels.

thats just me and what ive experience & my .02cents

Also, most people get a great AFR tune and have a guest'ament timing tune. I know a friend of mine used to go on "what people say is safe to run" for example the 1* timing pull per psi is very safe w/ boost. But when i made him a det. device he found he was running 8* too much timing and was knocking the whole time. Another guy tried the same tool on his "safe hondata tune" and found it was also having slight knock and had to back out liek 4*.

I'm just saying... If its tuned correctly, a golfkart motor should last on 10psi.


Modified by JDMs1eeper at 1:06 PM 5/11/2006

beerbongskickass

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by JDMs1eeper &raquo;</TD></TR><TR><TD CLASS="quote">
I'm just saying... If its tuned correctly, a golfkart motor should last on 10psi.
Modified by JDMs1eeper at 1:06 PM 5/11/2006</TD></TR></TABLE>

I think I am going to have to disagree with you on this one too lol.

JDMs1eeper

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by beerbongskickass &raquo;</TD></TR><TR><TD CLASS="quote">I think I am going to have to disagree with you on this one too lol.</TD></TR></TABLE>

819turbo

i do agree that B20 sleeves are weeker, but they can still take some boost. I have been running my B20b fro 2 year now @ 10 psi no problem.

i think the 0.2L does make a diff. Here is a small clip of my 4drs eg Vs a ls/vtec @ 10 psi teg.
I swa his setup for my own eyes, i still dont understand why i beat him
** 2 people in eg, 1 in teg**
http://media.putfile.com/B20bTVSLsVtecT

drintegra

my friend sprayed his b20 55-75 shot for a while b4 boost and iti is still holding up. I know the sleeves are weak, but the d16's make decent power all day totally stock. The b20 should be able to last on 10psi or less for a long time with the right tune. But who am I to say


Modified by drintegra at 5:27 PM 5/11/2006

819turbo

For sure TUNING is the key!