sarniacivic

hey
i ahve a 90 civic hb si, i was told u can use a gsr top end on the 90 si bottom end, anyone know anything about this or anything else u can do to a si motor to get some more hp

imported_Gatsby

mini-me is when you use a DX (D15b7 i.e.)block, with a Si Vtec head (from D16z6 i.e.)

GSR head won't fit your motor, since its from a B series motor. (Yours is D series).

GSR head would be useful for someone who has a Teg motor (b18b) and wants to Vtec it. Or for someone with a CRV motor (b20B) to again, VTEC it.

The best thing you can do, other than wasting money of bolt-ons, is to get a first gen DOHC-VTEC B16 motor swap.

There is ALOT to talk about here. You better do a search and you will find PLENTY of info on this.

Cynikal.Mindset

you can use the Si block aswell...so u would basically have a d16z6...but its not worth the hassles...just drop in a DOHC ZC and ur done!

no wiring, no tapping an oil line or that junk and u get more ponies anyways

shlammed

mini-me's are alright for power gain but most of the time it is better to just get a ZC motor. And it's any d-series block using any d-series vtec head.

dingus8

ya it's ok to do but...kinda a pain in the ***..and you better get a vafc (apexi) to tuen the fuel curve and vtec point cause it also bumps the compression into the mid 10:1's so more fuel is needed...I'd say jsut save for a DOHC zc..you coudl pick one up for 600-700..and you hace everything like tranny and **** already so you jsut need a motor...do that instead..cheap..simple...and quick

imported_eth0r

id say find a cheap b18a motor..lots around and drops right in

imported_BoOsTd

my gf has the exact same car as mine but in the si vtec.. mines non vtec... I seriously hardly notice the difference, if any at all...it is about 20hp diff, but its still a slow *** motor, bottem line!... i would never waste my time and money on a mini me swap... well unless you have the parts given to you, and you are really bord, and have all the proper tools and knowledge.. if not save another year for turbo or Bseries... just my 2cents

dingus8

you should switch trannies on her...

shlammed

no b-series motor 'drops right in' to a 4th gen...even with mounts theres some banging to be done

Cynikal.Mindset

^^ thats what I was gonna say...and whoever told ya otherwise is cracked!

DOHC ZC all the way!!