4age 20v Blacktop vs Silvertop

[shelldrake]

Does anyone know if the st and bt valves are compatible/the same?

[ae86-matt]

Nah sorry mate but they are different and the shape of the inlets are different (like the bit that connects the valve body to the block) hope that makes sense.

cheers matt.

[federal]

the AE86DC FAQ is your friend ;)

http://www.ae86drivingclub.com.au/faq/inde...4age/20vengines (http://www.ae86drivingclub.com.au/faq/index.php/BY_ENGINE/4age/20vengines)

[shelldrake]

<div class='quotetop'>QUOTE (ae86-matt @ Jun 3 2008, 04:17 PM) <{POST_SNAPBACK}> (index.php?act=findpost&pid=540770)</div>
Nah sorry mate but they are different and the shape of the inlets are different (like the bit that connects the valve body to the block) hope that makes sense.

cheers matt.[/b]

Thanks for that mate.

<div class='quotetop'>QUOTE (Meathead #1 @ Jun 3 2008, 05:53 PM) <{POST_SNAPBACK}> (index.php?act=findpost&pid=540826)</div>
the AE86DC FAQ is your friend ;)

http://www.ae86drivingclub.com.au/faq/inde...4age/20vengines (http://www.ae86drivingclub.com.au/faq/index.php/BY_ENGINE/4age/20vengines)[/b]


I actually had a look at that. I couldnt tell for sure and it wasnt stated. Thanks though.

[rthy]

they are the same/close enough to not matter

[ae86-matt]

hmm it really depends on what your using either one for??

like you can't put st throttles on a bt head (or vice versa) i know i tried it :fap:

so yes they are pretty much the same, however the differences mainly lie in how they are applied

[shelldrake]

<div class='quotetop'>QUOTE (ae86-matt @ Jun 3 2008, 10:03 PM) <{POST_SNAPBACK}> (index.php?act=findpost&pid=540996)</div>
hmm it really depends on what your using either one for??

like you can't put st throttles on a bt head (or vice versa) i know i tried it :fap:

so yes they are pretty much the same, however the differences mainly lie in how they are applied[/b]

Ummm...I put blacktop throttles on my silvertop...

[rthy]

I admit I am taking an educated guess as both heads definately have the same diameter and length intake and exhuast valves so it wouldn't be readliy possible to have a different product. Well unless it was like 0.2mm off or something which would be annoying, but although I am no expert I am sure that could easy be taken care of with the existing seat by a head shop

[Ru-iki]

<div class='quotetop'>QUOTE (shelldrake @ Jun 3 2008, 11:14 PM) <{POST_SNAPBACK}> (index.php?act=findpost&pid=541014)</div>
Ummm...I put blacktop throttles on my silvertop...[/b]


Me too, he needs to think harder. Unless he has an early silvertop head with the different ports. It should still bolt up though.

[ae86-matt]

hmm i might have to have a look this weekend......

But I'm sure there was some sort of difference, like the throttles had a round end but the head is square--or something to that effect.

Though if it does work i may still be able to use my bt head :2thumbs:

[rthy]

your talking about silvertop thottles on a blacktop head? I have done it, use the ST manifold but machine the edges out to matchport it to suit the BT shape

[ae86-matt]

yeah st throttles on bt head, cheers for that mate

(ohh and sorry for hijacking the thread, but i spose its all relevant info)