got a local tuner to tune my b20 hatch today on 7psi on neptune...and comments on the numbers are welcome and heres some specs on the motor and turbo setup-
b20b stock from throttle body to oil pan
s4c b16 trans
turbonetics turbo 50 trim 42/48
dsm 450's
3 bar map
b&m fpr
walbro 255
turbonetics 38mm wastegate 7 pound spring
greddy type rs bov
clutchmasters stage 3 clutch 3 puck
fidanza 7.5 lb flywheel
2 1/4 piping from downpipe to back of car

 

How come you stopped at 7psi?

 

this is just a temporary setup until i can finish my fully built motor and put it in...plus ive always heard things about the thin sleeves on the b20 so im playin it safe and plan on puttin the b20 in my 86 crx when my other motor is done

 

Pretty small turbo for the motor size. That thing much spool quick and a fun dd car.

 

atleast upgrade your exhaust... Its so small you bound to see atleast 20whp...

 

for the numbers you got with the turbo setup I am sure you could have achieved with a B16 head on it but congrats.

 

more tq than hp. nice cool set up.

 

gotcha. Must be a fun street car w/ all that tq. With a good tune and change of some of the parts you could go for more power safely. Jeff Evans said 250-300whp on a stock b20b should be pretty safe. Good luck w/ it and the new setup.

 

im pretty happy with it..i wouldnt get as much torque with the b20vtec but i have had it in mind.mite turn the boost up later to 10 pounds but its only got 30k miles on it and every gasket and seal is still factory,dont really want to beat the motor to death,it will be nice to put it in my coupe and have a/c with it later on down the road.thanks for all the nice input tho

 

Never heard of a Turbonetics .42/.48, sounds like an OEM .50 trim Saab/Dodge T3. Do you have pictures of the unit?

For the 2.25" exhaust, stock B20B intake manifold, etc, that's really not bad power at all. You can see how the torque comes up, but between IM and exhaust it gets hard to flow so the torque falls off pretty hard. Not the fastest car in the trailerpark, but damn fine for what it is. I also have a secret fetish for transexual teal cars, shhh, don't tell anybody.

BTW, the B20 sleeves aren't any thinner than the other B-series, they are siamesed and have problems when overheated. You could have pressed to 300 or even a bit beyond, as long as you don't "hot lap" the engine; the consensus from people who love B20 is that they are fine at that level for drag racing, but for roadrace or auto-x where you keep flogging on it and the sleeves don't have a chance to cool then they are weak.

 

its a turbonetics 50 trim

 

you need to add a dumptube on ur wastegate and route it under the car + upgrade to 3" exhaust. i can see you gaining at least 40whp with your setup on the same boost with this change

 

awww thats a cute turbo....

 

haha...yea.full boost at like 2500.itl b nice on my built ls/vtec reving to 9500!

 

nice numbers, the sleeves on a b20 are the same thickness as a b18..

 

actually it looks expensive. post more pics and new dyno sheet when you got the rest done

 

new pics up soon just debating on weather to sleeve a block or not...any input guys?