would a d15z1 head fit into a d15b7 block and what would i need to make this fit into a 91 hatchback si.

 

That would essentially be a mini-me, but you'll be using a VTEC-E head instead of a VTEC head.

Do a Google search, and you'll get a ton of results.

 

so whats the diffrence vtec and vtec-e ?

 

VTEC-E is designed for maximum fuel efficiency, and VTEC is designed for "performance".

"Performance" is not really the right word, but it's the best I can think of. Basically, it allows you to run two different cam profiles to broaden the powerband and maximize efficiency.

 

Thank you for info

 

No problem. Good luck.