• The Forum will be unavailable on March 27, 2023 from 8:AM to 12:00 PM EST for maintenance.

Twin Turbo Tall Deck


Veteran Member
Jun 29, 2009
To be fair I don't think Aeromotive makes amazing stuff. I did expect a working fuel pump. If I didn't need a bypass regulator and a pump capable of shoving plenty of fuel around, I'd just run a mechanical Holley pump like I have been for almost 20 years. I just went with the Aeromotive because they claimed it would do what I want. Now, even when I get it back, I don't know if I'll trust it. I am going to drop it down a bit lower to be more inline with the sump. If it quits when I'm leaving the line or midway down the track, well I'm not going to cry, but I won't have an engine any longer.
I shouldn't have pointed it out at you... I have a bunch of friends that spout aeromotive like it's gods gift to earth.


Veteran Member
Sep 4, 2013
Oviedo, Florida
Honestly, I appreciate all responses here. Trust me, I've heard anything and everything about both my car and this engine choice. I am going to say, again, that I fully understand what a 366 is. I am still going to make it do something. Even though I do have two 454s and one very nice 350. I like to play. I don't think I have ever said this but I will now. I would like a stock 366 to run an 11. No, not an 11.0. An 11.99. Make it worth putting my cage in. Make my car do something. Finally. Its been 11 years and i keep putting it off. Its time. Free big block. Cheap turbos. Methanol. Not because I have anything personally to prove, but because I want to see if the 366 can do it. They say it's junk. I am not disagreeing. I want to see if I can make some junk haul ass. I believe I can make it happen.
Last edited:


Veteran Member
Sep 6, 2013
Cincinnati, Ohio
We've all seen twin turbo builds before and this is going to be a little different. This is a 366 flatbed turd. I got this motor for free and the only thing I could think of to do to make any reputable hp was to bolt two Chinese turbos to it and run it at as much boost as it'll take. For those that don't know, the 366 is the 427 tall decks ugly cousin with the same crank but smaller bore. You can't bore it to a real big block bore, but it does have about a 4 inch bore and a 3.76" stroke. It's like a 383 in a heavy, big block, canted valve platform.

This is a 91 tbi motor. I don't like tbi for tuning so I tracked down a really old 4 barrel factory manifold. The 4 barrel manifold actually has larger diameter runners that match the head ports perfectly, unlike the tbi intake that had tiny runners. I guess that'll raise the powerband about 500 to 1000 rpms which is fine since these supposedly peak around 4000 and provide more airflow.

I'm keeping the short block stock including the cam. It has dome pistons and 427 tall deck truck heads.

My best guess is if it works it'll make around 450 hp and 600 lb ft at 10 psi. I'm not doing this for numbers though. I see a lot of hate on these motors and I figured I'd put 500 bucks into it and see what it runs at the track. If I'm not happy, I'll add two Chinese intercoolers and swap the wastegate springs.


I support that build, the only negative is the weight of the assembly IMO... It'll probably surprise you!


New Member
Dec 10, 2022
Really love this 366 build. All the luck to you. Since it is more like a sbc 383 i am always thought of using very lightened up and inspected reciprocating with longest rods assembly and valves on this stout big and tall monster.