Bolt on turbo kit (2 Viewers)

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Yeah, my setup is a little different so I won't see the same results. Most noteworthy is that I have a smaller turbo. My turbo is only a 57.8mm while this turbo is a 62mm. That means that basically even at highway cruise speeds I am just on the verge of positive manifold pressure and my fueling drops down into the 12's. While the bigger turbo when just cruising will still be around 14.7:1 and only be rich when under boost.

I know my build thread is long and kind of a mess. But I mentioned one time when I was driving cross country that if I was going to be doing a lot of highway miles I would want a bigger turbo. This is the reason why. That and a small turbo spinning a few pounds of boost for hours of driving kind of overwhelmed my intercooler and I would have to drop from 82-85mph to 72mph to let it deal with the heatsoak. But on that same trip in the middle of the night either in Kansas or Missouri, I put 20lbs of ice in my water tank and hit 130+mph lol.

Post from 5/2016.
I see about 10-11.5mpg around town and 15-15.5mpg on the hwy. the around town includes quite a lot of idling and a little hooliganing. The hwy mileage isn't changed from before I was boosted unless I push it up to 80+mph I think I said when I was driving across country and sitting right over 85mph in that vacuum/boost area, I was only getting like 12mpg hwy, and I was overwhelming my intercooler setup, since it wasn't enough boost to kick on the water/meth but it was just enough boost to heat up the air charge. In that situation a front mount air/air would be king, but I just don't do 80-85+mph for hours often enough and with my shortbus, winch and grill mounted lights I just don't have any space for an A/A.

White Stripe said:
The reason I ditched the 1fz was because scottryana reported his fuel mileage as being around 12mpg with his turbo. So I went LS. But 16 is pretty good and may have swayed me to stay 1fz. City driving I get 14-16mpg with the LS. I have stock sized tires though.
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But even with a bigger turbo, if u hit a headwind, pull a trailer, roof top tent, or start climbing a hill/mountain pass then the extra load to keep speed would dip it back I to boost right? 130mph is nuts in a landcruiser. I've gotten close to 100, and that's faster than comfortable for me. I like my cruisers, but I'd rather not die in one.
scottryana said:
Yeah, my setup is a little different so I won't see the same results. Most noteworthy is that I have a smaller turbo. My turbo is only a 57.8mm while this turbo is a 62mm. That means that basically even at highway cruise speeds I am just on the verge of positive manifold pressure and my fueling drops down into the 12's. While the bigger turbo when just cruising will still be around 14.7:1 and only be rich when under boost.

I know my build thread is long and kind of a mess. But I mentioned one time when I was driving cross country that if I was going to be doing a lot of highway miles I would want a bigger turbo. This is the reason why. That and a small turbo spinning a few pounds of boost for hours of driving kind of overwhelmed my intercooler and I would have to drop from 82-85mph to 72mph to let it deal with the heatsoak. But on that same trip in the middle of the night either in Kansas or Missouri, I put 20lbs of ice in my water tank and hit 130+mph lol.

Post from 5/2016.
I see about 10-11.5mpg around town and 15-15.5mpg on the hwy. the around town includes quite a lot of idling and a little hooliganing. The hwy mileage isn't changed from before I was boosted unless I push it up to 80+mph I think I said when I was driving across country and sitting right over 85mph in that vacuum/boost area, I was only getting like 12mpg hwy, and I was overwhelming my intercooler setup, since it wasn't enough boost to kick on the water/meth but it was just enough boost to heat up the air charge. In that situation a front mount air/air would be king, but I just don't do 80-85+mph for hours often enough and with my shortbus, winch and grill mounted lights I just don't have any space for an A/A.
Click to expand...
 
Yeah a LS will get better gas mileage than a 1FZ in boost for sure. There is no getting around the fact that when in boost you have to run rich. To be perfectly honest the gas mileage gain would be very small for a turbo and it would have to be in perfect conditions. You add some big mountains, a trailer, etc and your gains are quickly going to go away.

White Stripe said:
But even with a bigger turbo, if u hit a headwind, pull a trailer, roof top tent, or start climbing a hill/mountain pass then the extra load to keep speed would dip it back I to boost right? 130mph is nuts in a landcruiser. I've gotten close to 100, and that's faster than comfortable for me. I like my cruisers, but I'd rather not die in one.
Click to expand...
 
scottryana said:
Yeah a LS will get better gas mileage than a 1FZ in boost for sure. There is no getting around the fact that when in boost you have to run rich. To be perfectly honest the gas mileage gain would be very small for a turbo and it would have to be in perfect conditions. You add some big mountains, a trailer, etc and your gains are quickly going to go away.
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Having the ability to smoke rubicons and trd pros will be worth it though.
 
NLXTACY said:
Fuel economy increase...confirmed.

I could have easily hit 300 but next gas station is 52 miles away. The light just started glowing. I have never seen an 80 hit 300 miles on a tank. My own SC’d 80 gets 220 on a good day and I’m stocked to get that! 😳

Last fill up on this truck on the way out to Flagstaff was 270 with a bright fuel light. I really pushed it. Dylan can attest to his previous fill ups.

Oddly enough, only 18 gallons went in just now. So that means 16.44 MPG. 🤔

View attachment 1940823View attachment 1940824
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$84 bucks for 18 gallons?! where was that so I don't go there...
 
landtank said:
everyone needs to understand that even a bone stock 80 has error in the speedometer. Slap on some 285/75R16" tires and the error increases. So posting your numbers here is a garbage in garbage out scenario unless you have a calibrated speedo.
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I will caveat all mpg claims in the future with appropriate math equations. As an engineer, I'd like to think I can grasp the basic concepts to properly determine mpg. If you'd like to check my mileage, Google the distance from Colorado Springs to Avon, Colorado and multiply by two for the roundtrip that started with a full tank and ended with the light on.
 
Haha not sure how we ended up in a “calibrated instrument” measuring contest but I think it’s fairly safe to say with 1 fill up nothing can actually be said about mileage.

But if you have a vehicle that has never achieved 300 miles before the light comes on and after a change it consistently does it’s ok to say that there is an improvement. No instruments required.

That being said I do not think we are at that point with this setup. And I will put money on the fact for 90% of drivers there will not be an increase.
 
My fuel mileage would definitely get worse!
 
Way to go !!! Shows the overwhelmingly positive value of OCD behavior in product development !
 
Carb approved?!?!?!?!?!?

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