Mega Truck turbo sizing???
Thread Starter
Staging Lane
Joined: Apr 2014
Posts: 50
Likes: 0
Mega Truck turbo sizing??? Looking to build a turbo motor for my rear engine mud truck, I've been researching this for a while now and was looking to have a few questions answered for me since my application is a little different then everyone elses on here.
I already have a L33 5.3 with the 799 heads, Th400, microsquirt and harness, A1000 fuel pump.
I was looking to put either twin on3 70mms, or a single on3 78/75 setup on this, and keep the motor stock except for PAC 1218 valve springs, and maybe a cam if i need it to get to my power goals.
I'm shooting for over 800hp at the crank, the main thing I'm worried about is turbo spool time, don't want it to be laggy.
Truck its going in is a tube chassis, rear engine, 4 linked, tractor tires, military 2.5 ton axles, that weighs in at around 5100lbs
My main question is in a truck this big and this heavy will that affect my turbo sizing any?
I already have a L33 5.3 with the 799 heads, Th400, microsquirt and harness, A1000 fuel pump.
I was looking to put either twin on3 70mms, or a single on3 78/75 setup on this, and keep the motor stock except for PAC 1218 valve springs, and maybe a cam if i need it to get to my power goals.
I'm shooting for over 800hp at the crank, the main thing I'm worried about is turbo spool time, don't want it to be laggy.
Truck its going in is a tube chassis, rear engine, 4 linked, tractor tires, military 2.5 ton axles, that weighs in at around 5100lbs
My main question is in a truck this big and this heavy will that affect my turbo sizing any?
TECH Apprentice
Joined: Jan 2014
Posts: 362
Likes: 1
From: Torrance Ca
im no expert but with a truck that heavy and tires that huge the engine will be under an enormous load so i dont think spooling a turbo on the larger side would be an issue. I think the 78/75 might even be a little small for that application
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Teching In
Joined: Jul 2014
Posts: 30
Likes: 0
From: Arab,al
If you want jump out of the hole power, i would say twins. Looks like a fun mud truck. My friend has a ford with 2.5ton's 6.0chevy with box 475bw turbo. It moves out pretty good. Good luck with your mud truck.
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im not sure on the exh wheel on the on3 88mm but remember this you can play with the cam valve events if your looking to spool a big wheel or you can shrink the hot side so instead of a 2.25 use a 2" to get it to spool sooner,use a twin scroll deal and keep the tubes sep and lead them up into the housing its self..your not in a all out drag class where you will be seeing high rpms and living up in that area 90% of the time so some back pressure wont kill you if you use a smaller hot side.
6.0 with a s475
14.9s 2.5ton turbo 400 and 2to1 in the case
word of advise make sure everything is water tight, my injectors didnt sit right in the intake because fuel rail was off, and killed my motor
Turbo power mud truck at st lucie mudjam - YouTube
Turbo ls1 Mudtruck test pass - YouTube
14.9s 2.5ton turbo 400 and 2to1 in the case
word of advise make sure everything is water tight, my injectors didnt sit right in the intake because fuel rail was off, and killed my motor
Turbo power mud truck at st lucie mudjam - YouTube
Turbo ls1 Mudtruck test pass - YouTube
Staging Lane
Joined: Apr 2013
Posts: 54
Likes: 0
here the link to the motor build on here and have the whole build on another forum
https://ls1tech.com/forums/forced-in...noise-vid.html
https://ls1tech.com/forums/forced-in...noise-vid.html