Hi I just bought a 1990 Integra RS with a T3/T4b turbo on it. It is a B20B Block with a RARE P8R head and it is currently only running 5psi. i was wondering if it was safe to run more boost?

Albert

List of Specs:

T3/T4b trim .50 A/R
Blox Manifold
Blox FMU
Tial 35mm Wastegate
Tial 50mm BOV
FMIC
2.25 IC piping
MSD inline fuel pump
2.25 downpipe
6 lbs. of boost

B20B block
RARE P8R head
Skunk2 intake manifold
B16 tranny
8.5 lb flywheel
Heavy duty clutch

AEM fuel rail
B&M reg.

 

for daily driving you can boost 7 psi; at the track 12 is maximum with all stock internals. welcome to hondatech, i used to live close to lake geneva.

 

it is all stock internals. I have heard of guys running 7psi on a B18, not sure of the B20. You may want to ask in the forced induction forum as they deal with this stuff all day long

 

B20's really aren't safe with any boost. I'd keep it limited to a maximum of 6 pounds of boost, and make it a point to invest in some quality engine management.

And the P8R head isn't particularly rare. I see them all the time.

 

B20's are good for 10-12 when you plan on going to the track. The only thing that sucks is when you want to uprade the stock internals cause its a 84mm bore so the stock sleeves are weak. but if you want to be safe get a vafc and some bigger injectors like 310-370. but when I go out to the races I set mine at 10 and put some vp 110 race gas. and I haven't had any problems and all I have is a shitty fmu. but my b20 still is kicking after 6 months

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Turboredteg &raquo;</TD></TR><TR><TD CLASS="quote">B20's are good for 10-12 when you plan on going to the track. The only thing that sucks is when you want to uprade the stock internals cause its a 84mm bore so the stock sleeves are weak. but if you want to be safe get a vafc and some bigger injectors like 310-370. but when I go out to the races I set mine at 10 and put some vp 110 race gas. and I haven't had any problems and all I have is a shitty fmu. but my b20 still is kicking after 6 months </TD></TR></TABLE>

why would he get a vafc? it's non-vtec.

get a safc or get something like turbo-edit or some kind of fuel managment

 

Wtf is a P8R head for my info please....

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Contender25 &raquo;</TD></TR><TR><TD CLASS="quote">Wtf is a P8R head for my info please.... </TD></TR></TABLE>

Here's some info about the head, if you haven't heard of these:
Exactly which models of Hondas in Japan that received this head is still unclear. Most of the B20's that are imported to the US have the same head as the US B20's. For whatever reason though, honda deceided to use a different on a small number of the JDM b20 engines.
The head casting code for these heads is: P8R

1.) The P8R heads received larger, VTEC sized intake valves (33mm vs the nonvtec 31mm). You can assume that the valve seat has been opened up significantly to accomodate the larger diameter valve, which in turn means greater air flow in the later rpms, which is where the other nonvtec heads fall flat on their face.

2.) The bore of the combustion chamber is opened up to 84mm to match that of the B20 cylinders for better burn effeciency.

3.) Wider intake ports than the B18a, but smaller than the B18c or B16a.