4BE1 Pics

**Dougal** · 14th July 2010, 08:10 AM

Anyone got pics of an Isuzu 4BE1?

I'm interested in the inlet manifold mainly, wondering if they made any radical changes there to get the power levels up in a non turbo engine. One of the guys here (might be Andrew E) fitted a different inlet manifold with a bigger intake flange to his 4BD1 a few years back and dropped the EGT's, I suspect this might have been a 4BE1 part.

**jerryd** · 14th July 2010, 08:40 AM

I can take a few pics later and post them, providing I get my computer back from the repairers

**jerryd** · 14th July 2010, 09:04 AM

Here's a couple of shots, not sure if they are any good though

**Dougal** · 14th July 2010, 09:20 AM

Thanks Jerry, they're exactly what I wanted to see.

Basically the 4BE1 is at least 10% better at processing air than a non turbo 4BD1. I think this change is mostly due to the intake manifold design. I wasn't sure if the 4BE1 used that particular manifold, but your pics confirm it does.

Might be a cheap and easy 10% gain for the rest of us. I think there should be some mpg's hidden in there too.

**jerryd** · 14th July 2010, 10:07 AM

Glad they are of some help, maybe that's why the 4BE1 goes so well then

With this colder weather we are getting mine seems to be flying along and I actually hit 120

the other day.

Of course it could just be a new air filter and an oil change that's done it. I still keep pondering "Turbo" or "Two Stroke" as I'm still waiting on the rotec design to finalise and see if it's compatible for the engine bay

**Dougal** · 14th July 2010, 03:12 PM

Originally Posted by jerryd

Glad they are of some help, maybe that's why the 4BE1 goes so well then

With this colder weather we are getting mine seems to be flying along and I actually hit 120

the other day.

Of course it could just be a new air filter and an oil change that's done it. I still keep pondering "Turbo" or "Two Stroke" as I'm still waiting on the rotec design to finalise and see if it's compatible for the engine bay

That's an easy call, they already make turbos.
Does your engine have a rotary or inline pump? I thought they were all rotary, but there's one for sale in NZ which supposedly has an inline pump.

**rick130** · 14th July 2010, 07:07 PM

Originally Posted by Dougal

That's an easy call, they already make turbos.
Does your engine have a rotary or inline pump? I thought they were all rotary, but there's one for sale in NZ which supposedly has an inline pump.

Looks like a rotary in that last pic Dougal.

**garryseries3** · 15th July 2010, 05:55 AM

Originally Posted by Dougal

Thanks Jerry, they're exactly what I wanted to see.

I wasn't sure if the 4BE1 used that particular manifold, but your pics confirm it does.

Dougal just a quick note my 1990 4BD1 has that same manifold with the offset in the middle section to split the air. I think you find it was a later modification on 4BD1 motors.
Garry

**Bearman** · 15th July 2010, 06:13 AM

Originally Posted by garryseries3

Dougal just a quick note my 1990 4BD1 has that same manifold with the offset in the middle section to split the air. I think you find it was a later modification on 4BD1 motors.
Garry

The injector lines are different too on the later 4BD1's with this manifold, so you will need them if you install it.

**Dougal** · 15th July 2010, 07:48 AM

Originally Posted by garryseries3

Dougal just a quick note my 1990 4BD1 has that same manifold with the offset in the middle section to split the air. I think you find it was a later modification on 4BD1 motors.
Garry

That's interesting. I haven't personally seen a 4BD1T later than about 88, there are pics of many US engines on 4btswaps (used until 94 I believe) and they all seem to have the same manifold I have.
Do you know what market your engine was originally sold into?

Regarding the injector lines, there's a thread on here somewhere (just been searching, can't find it) of Andrew E (there are a lot of variations on that username) doing the manifold swap on his 4BD1T to that 4BE style. If injector lines needed done there should be mention of it.

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