blacktop head on silvertop block

[groupagt4]

Sorry if this has been asked i did search.

Jus got myself a ae86 with a silvertop in it, got the normal mods like b/t t/b extracters, mega squirt ecu mitsi coil pack and so on,

What I need to know is what parts would i need for the conversion other than the head and is there anything tricky to it.

all i need to do is change the head over ill take it in to get dyno tuned

[Zak]

Any reason for the change? I don't thnk I'd bother for the small increase you'll gain.

You probably want to talk to the guys on garage dori, as they know alot about the mega squirts, wouldn't suprise me if the car came for there too.

[groupagt4]

oh sweet thanks i was told by the previous owner it would make a bit of a diference but yea maybe worth it if it gives a increase of 15-20 horse power?

[Mr Revhead]

you wont get that much from the swap.

debatable if you will get anything.

are you saying its got black top ITBs on it?

[groupagt4]

oh ok they speak pretty highly of the b/t head ha. yea its running b/t itb s. would it be better to get the head ported and flow matched

[Mr Revhead]

i think so.

some ppl believe the b/t ITBs to be a bit big for a near stock 20v.

[ChaosAD]

http://forums.toyspeed.org.nz/viewtopic.php?t=64299&highlight=blacktop+silvertop+hybrid
http://forums.toyspeed.org.nz/viewtopic.php?t=18570&highlight=blacktop+silvertop+hybrid
http://forums.toyspeed.org.nz/viewtopic.php?t=18515&highlight=blacktop+silvertop+hybrid

[ujeanie]

"would it be better to get the head ported and flow matched"

for the price of a head gasket, head bolts and a blacktop head, + slight performance gain; its cheaper to just change to blacktop head. Dont muck about porting and flow matching.. flow matching when done right cost a whole lot than the above.

the 15-20 hp gain would come from the increase compression if you use a TRD head gasket and retune the fuel and spark map on the megasquirt. I'd done research on this in depth before i decided to transplant my AE86.