20 valve ITB's

[Gts_coupe87]

okay i recently purchased a 20 valve silver top to put into my ae86 its in prep right now so im trying to figure out the itb setup.. okay im new to this 20 valve stuff.. i wanna know do i have to purchase the itb's or do u just add on to the 4 throttle manifold?? like i know it sounds kind of dumb but i cant find itb's anywhere for 20 valve so im kinda thinking how did they get the itb's.. unless im not looking right, can someone please tell me how to do this.. please. itll be very much appreciated. thanks.

[Sam-Q]

they come with them originally. So just source the original manifold and throttles

[dr.occa]

^What Sam-Q said. They already come equipped with them. Unfortunately you can not run them without an airbox. The 20v silvertop ecu uses MAF for referencing. The only way to run w/o an air box would be to use stand-alone or run the blacktop harness and ecu.

[Gts_coupe87]

^What Sam-Q said. They already come equipped with them. Unfortunately you can not run them without an airbox. The 20v silvertop ecu uses MAF for referencing. The only way to run w/o an air box would be to use stand-alone or run the blacktop harness and ecu.

okay so ill just do that then....

[CBR_TOY]

got any pics of the motor? just curious to see what ya working with

[Sam-Q]

you can run the airbox, it just takes a bit of work to make it fit:

[CBR_TOY]

what shock brace is that..... looks beefy

[dr.occa]

Wow! Yeah, that's a serious tower brace Sam! Looks good too.

[joel26]

from what i read a while back he said he made the tower bar...

[CBR_TOY]

sweet! i'd buy one ha ha

[Sam-Q]

yes I made it myself and it has no deflection at all even with suddenly forcing all my body weight on it so I did overdo it a bit. It's made from 4130 (Cro-Mo) as I think aluminium is a poor material to make braces from and is only used because of how cost effective it is.

Here is test pannel from the middle:



I have had people ask me about making one before even ignoring the time it would take it couldn't be mass producted as it was welded in place while bolted on the car. This would mean it's very unlikely to fit other ae86 out there due to the lack of adjustment. The M8 tower studs don't even come close to holding the torque needed on it, this is why if anyone at all is trying to sell a brace that has all of it's sides fixed without adjustment is very likely a con artist or they are ignorant.

Here is a better pic of my airbox during the construction, it still has full length home made trumpets inside:

[dr.occa]

I figured you either fabbed up your own air box or modified the factory one. I had installed a customer's airbox upside down since he didn't have a budget for a custom box. He just wanted to be able to drive it home. I like that one you modified Sam. Make a few more and sell them to Silvertop fans.

[Gts_coupe87]

got any pics of the motor? just curious to see what ya working with

i mean i can take some pics and post them but i really want to wait till its done then ill post all the pics from start to finish..

[Sam-Q]

I figured you either fabbed up your own air box or modified the factory one. I had installed a customer's airbox upside down since he didn't have a budget for a custom box. He just wanted to be able to drive it home. I like that one you modified Sam. Make a few more and sell them to Silvertop fans.

ha! yes it's a modified OEM one, not much of the top part is left now. I have thought about making a few more simple versions but it would still take way too much time for what I could sell them for. Would be good for the guys boosting as well I guess