stock 91 civic std d15b1 + hf tranny

thinking of swapping d15b6 head onto b1 block

few questions:

1. any diff's b/w b1 and b6 block?

2. which head gasket would i use with b1 block/b6 head?

3. anybody happen to have a full b6 swap in the northeast?

thanks everybody!

frank

 

sucks your so far away man! I have a b6 just sitting in my garage collecting dust

 

b6? whats the point?

 

good question. certainly not performance.

the hf tranny+b1=no torque

i mod for mpg, and the b6 also has a lot more torque than the b1.

and it gives me a built in mpfi upgrade for a little added power/efficiency

bump 4 ?s

 

bump:

1. any diff's b/w b1 and b6 block?

2. which head gasket would i use with b1 block/b6 head?

3. anybody happen to have a full b6 swap in the northeast?

thanks guys!

 

bump

 

D15B1 - 16 valves
D15B6 - 8 valves

D15B1 Pistons - 16 Valved Relief
D15B6 Pistons - 8 Valved Relief

You would lose power and you would lose torque as the combustion cycle would not be able to pull in as much oxygen as needed.

 

Additional info - Use the D16Y8 head gasket. It's the same part number as the Z6 headgasket, but it's only 25$. Use this one over the headgaskets offered for our years, as they are paper and the newer ones are metal.

If you run MPFI with the B6 head, you may have efficiency issues in the combustion chambers from the piston designs, but these are just my thoughts.

 

Do you mean the valve seats may not sit right on the reliefs? I don't understand what "efficiency issues" are. Please explain what you mean, Thank you for your input.

 

torque/power/oxygen of a b1 block/b6 head would be the same as a full b6, no?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by budomove &raquo;</TD></TR><TR><TD CLASS="quote">torque/power/oxygen of a b1 block/b6 head would be the same as a full b6, no?</TD></TR></TABLE>

He's saying that the pistons in the B1 block do not have valve reliefs for 16 valves, but for 8 valves. So it would be safe to assume that this swap would actually DECREASE your performance, and maybe even your MPG !

 

Sounds like a bad idea to me.

 

The b1 block has 4 valve relief pistons (it is a 16 valve)

the b6 head has two valves per cylinder (8 valve)

the b6 does have less hp than the b6, but more low end torque, and "pep" that comes from mpfi, so I don't understand why the swap would lead to less power/mpg if the b6 is rated for more of both. Not to mention the 90-91 b6 block had 4 valve relief pistons even though it is an 8 valve engine. same with the b8, the cx eg 8 valve