20v Silvertop vs Blacktop - What are the differences

[Matt]

Internal Differences

* Rods
* Pistons
* Head
* Chamber size / volume
* Inlet ports
* Oil pump
* Hydraulic Tensioner
* Timing belt
* Cam Gear Degrees
* Cams
* Blacktop is interference
* Flywheel - Blacktop has been lightened significantly. cut outs around the bolt holes.

External Differences
* Quad size
* Colour of cam covers
* AFM vs MAP
* ECU
* Wiring Loom
* Airbox
* Ignitor bracket - silvertop has starter relay mounted on it.

Exact Same Parts
* Rings 1.2mm top 1.5 2nd and 3mm oil ring
* Dizzy
* Coil
* Ignitor
* Block
* Crank
* Head bolts
* Injectors

Parts that can be shared

* Silvertop timing setup IF you use the silvertop oil pump
* Rods
* rings / bearings
* Cam covers

[Matt]

Pics will come and i'll update it properly with CR ratios and that , but for now it is a placeholder...

[Lurkin]

injectors are also different, blacktops having the superior spraying pattern.

[Matt]

Who told you that???

The part numbers are exactly the same

23209-19015

[FoldKing86]

Who told you that???

The part numbers are exactly the same

23209-19015

I agree Matt, i have had both in my hands and they are indeed identical on the outside.

If there was a difference it may of been right at the very end of the bt run or the very early st engines, but i am yet to see any part numbers to support this.

[pen15]

rings and bearings can be used in both 1.2mm top 1.5 2nd and 3mm oil ring same as each other bearings are exactly the same aswell

[Lurkin]

I was told it by a guy who has raced an ae101 for years.

Aware the fitment/ flow rate / part numbers etc are the same, nevertheless, he thought the spray pattern between them was different.

[Matt]

Though allot of people use 1jz injectors...

[pen15]

1j 2j 3sgte use all the same fitting injectors as the 20v spray pattern between black and silver is the same

[Matt]

waiting to confirm that the crank pulley on the blacktop is 2mm thinner, and the timing belt drive is 2mm wider

[pen15]

i think the crank pully could be different i use a JDM 16v rwd pully on my bt20v and i had to trim some off the back of the shaft to make it line up with all my other rwd stuff i didnt expect that when i done my conversion at all

[Sam-Q]

On the blacktop the cam belt drive pulley is wider to suit the timing belt which is also wider and has a different profile of teeth.

As for other differences what did you guys want to know?