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Old 04-23-2021, 05:39 AM   #1
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Sheep VG30i improvements? (Newb)

Hey guys,


Usually I start my research off by short circuiting my brain with diagrams and forum posts but this time i'm a little lost.


I inherited my grandpa's truck and really want to keep the stock block and get it to 500k. These are my two conditions, to my goal which is below 2k rpm on the freeway. Currently sitting at like 3, 3 and a half grand going like 70-75.


Wanting about +40-50 horsepower in the most efficient way possible without ruining the OG engine. I hear that VG's can take some amount of boost, which may be interesting to look into.



The truck is:
1988 D21 4x4 SE trim
VG30i engine 3.0L 6cyl <--- stok af


Currently buttoning up suspensions and steering cause that's kinda important to have redone. Any power recommendations would be sick, and appreciated!



I'm sure this post has been made before by others, if so a link to their posts would also be appreciated as well.
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Old 04-23-2021, 07:55 AM   #2
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There is a reason it is called the three point slow lol
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Old 04-23-2021, 09:31 AM   #3
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Quote:
Originally Posted by oxfoot View Post
I inherited my grandpa's truck and really want to keep the stock block and get it to 500k. These are my two conditions, to my goal which is below 2k rpm on the freeway. Currently sitting at like 3, 3 and a half grand going like 70-75.


Wanting about +40-50 horsepower in the most efficient way possible without ruining the OG engine. I hear that VG's can take some amount of boost, which may be interesting to look into.
Well, let's start by saying that if you want 500k from this machine, major engine mods will negate that goal, at least for the engine. "Boostin'" anything will shorten its lifespan. If you can keep it as "stock" as possible and drive like a "real human", that is your best bet to reaching a goal of 500k, all stock. Well, minus having 2 or 3 spare engines to play with and drop in, as needed... along with regular maintenance and having a slew of spare parts. How old it is, again? <think about it...>

Why change things? Think you can do better than the engineers that designed it? Remember, they went to school for this sh!t...



But I digress... your end call. There's a ton of stuff that can be done to these. Some of us are purists... so a grain of salt, ya know?
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Quote:
Originally Posted by Deerhurst
What he is saying is the aerodynamics of a D21 is a brick in the wind.
Probably at least as bad as a Jeep so worse than a cow.
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Old 04-23-2021, 09:47 AM   #4
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Quote:
Originally Posted by oxfoot View Post
Hey guys,


Usually I start my research off by short circuiting my brain with diagrams and forum posts but this time i'm a little lost.

I inherited my grandpa's truck and really want to keep the stock block and get it to 500k. These are my two conditions, to my goal which is below 2k rpm on the freeway. Currently sitting at like 3, 3 and a half grand going like 70-75.

Wanting about +40-50 horsepower in the most efficient way possible without ruining the OG engine. I hear that VG's can take some amount of boost, which may be interesting to look into.

The truck is:
1988 D21 4x4 SE trim
VG30i engine 3.0L 6cyl <--- stok af

Currently buttoning up suspensions and steering cause that's kinda important to have redone. Any power recommendations would be sick, and appreciated!

I'm sure this post has been made before by others, if so a link to their posts would also be appreciated as well.
In my humble opinion, your best bet is to restore what you have now as stock. You start modifying it, beating it after it has been on the road for 33+ years, you will end up with nothing good. These trucks are increasing in value all the time, especially in the restored stock versions. Adding modern lighting and a big stereo is okay though. Here is some inspiration. All running gear is stock, although I switched to 15 inch tires and wheels.
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Old 04-23-2021, 12:45 PM   #5
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Quote:
Originally Posted by cadillacdude1975 View Post
There is a reason it is called the three point slow lol

That's the Toyota 3.0! That thing is garbage.





Ox, if you want another 40-50hp the easiest way to do that is drop in a VG33 with headers and cams. Long tubes on the VG30i will liven it up some .I was very happy with that setup when I had it in my truck.



If you are turning 3300RPM at 70 it sounds like you have a 4wd truck. There are some 4.11 gear 4wd trucks out there but not many. Those turn closer to 2700RPM at 70.
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Old 04-23-2021, 04:59 PM   #6
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You guys are awesome,


I think I am just going to go with keeping it stock and parts stocked ++ That makes the most sense in my opinion as well.



I am interested in the gearing ratio DeerHurst talked about. Would that be done by swapping the tranny out from another pathy/D21?


You guys are seriously the shit, I feel stupid in the best way here.
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Old 04-23-2021, 05:02 PM   #7
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Would bigger tires also help the revolutions come down by any substantial amount or nah?
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Old 04-23-2021, 06:43 PM   #8
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5-10% depending on the tire difference I’d imagine.
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Old 04-23-2021, 09:59 PM   #9
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Changing your gear ratio requires you to change out the rear differential. The later versions like my truck have a third member that can be swapped out, yours might be the same. If you have a 4x4, you’ll need to swap out the front diff to match the back.

I don’t know if these engines make enough torque to cruise on the freeway at less than 2k rpm, you’ll probably end up downshifting into fourth gear a lot more.

Your truck appears to have a rust problem, many D21s in colder areas do. If you don’t address the rust, 500K miles ain’t gonna happen. If you can see the rust on the outside, it probably means the frame-bed-doors, etc. have been affected as well.

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Old 04-23-2021, 11:19 PM   #10
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VOTS95, rust is definitely getting dealt with where it matters


Clear coating the panel rust though
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