2.3/2.6 qustion

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1987 isuzu space cab
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2.3/2.6 qustion

Postby 1987 isuzu space cab » Sat Jun 07, 2014 3:26 am

Ok so i built this combo
but do to a bad valve spring I olny got 34 miles
Ok what been done or did
Stock build up 2.6 bottom end with 20 over pistion
stock 2.3 head with stock valves and a1995 2.6 cam
Ok so it seem to have a lot good power
never got to go ful bore with it i was just trying
to get the brake in done but now I would like to no
What are the advantage to the 2.6valves. in the 2.3 head
the truck had sum nuts with this combo
But now i hear that the ports are a problems with
The 2.3 heads that it can't get a nuff air as far as the ports
are to small and on the top end of the powerband it fall flat on it face
Ok now I've got my newly use head and got a little bord and stared to play
now I'm not done with it but I'm lookin at spolin a trubo hear if possible don't

have yett but lookin at one
Attachments
CAM00106.jpg
The intake
CAM00010.jpg
The block
CAM00110.jpg
Chamber
CAM00104.jpg
Exhust port

oldestisuzuist
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Re: 2.3/2.6 qustion

Postby oldestisuzuist » Sat Jun 07, 2014 12:38 pm

The 2.3 ports are big enough for all but possibly the very top end of the rpm range. The 2.6 valves will fit into the 2.3 head and are maybe 10% bigger. An over-bored 2.6 would take a little more air-fuel, your 95 cam may have a few degrees more duration than the stock 2.3 cam but it still has the same lift, so until you go to both a higher lift cam and the bigger valves don't worry about the port size.
What style piston did you use, pre-'92 near flat tops or the '92-on deeper dished? It makes a difference on the compression gain using the 2.3 head & will also effect the advantage of adding the bigger valves. If you used the early pistons you probably have too much compression already to turbo, or at least by much. The complete unit from a turbo EFI Impulse is about as close to bolt-on as there is as long as you can figure out the electronics. Finding a head gasket that will withstand the added pressures may be the bigger problem. BTW the turbo Impulses used the standard size 2.3 valves, not the 2.6 valves & different cam the non-turbo EFI Impulses used.
'78 Chevy LUV,1.9,4sp,headers,31's,SAS Dana 30,Dana 20,SOA rear w/Aussie Locker, body ROUGH, bought new 12/4/78. A pre-P'up?
'87 Trooper,2.3,5sp,headers,31's,ball joint flip & spacer,Aussie Locker rear,Superwinch hubs,brush guard w/5.5K winch.

1987 isuzu space cab
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Posts: 31
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Re: 2.3/2.6 qustion

Postby 1987 isuzu space cab » Sat Jun 07, 2014 4:12 pm

Ok thanks for the info and yea i did buy pre 92 pistions
so yes it was high compression wiht a stock 2.3 head
and 20 over pistions and yes the cam
has the same lift as the stock 2.3 just did it becouse that what i read
But now with me having to rebuild this rebuilt engine agen
i would like to get more out of it throughout it powerband
and all the info will help out a lot
Attachments
CAM00114.jpg
What a new valve can do wen you pisss it off

oldestisuzuist
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Re: 2.3/2.6 qustion

Postby oldestisuzuist » Sat Jun 07, 2014 10:28 pm

Quote: "I would like to get more out of it throughout it powerband."
A 272 grind Delta cam will help do that, it retains the stock lower rpm power but really comes alive past 3500 rpms. The added lift & duration will also help with the pinging, also adding the 2.6 valves will help even more, it might even be possible to run regular grade gasoline. You will need to also install elephant foot adjusters or valve stem caps to correct the rocker arm to stem contact pattern with the regrind cam.
If you want all your power boost below 3500 rpm use the 260 grind & the 2.6 valves wouldn't be as desirable.
'78 Chevy LUV,1.9,4sp,headers,31's,SAS Dana 30,Dana 20,SOA rear w/Aussie Locker, body ROUGH, bought new 12/4/78. A pre-P'up?
'87 Trooper,2.3,5sp,headers,31's,ball joint flip & spacer,Aussie Locker rear,Superwinch hubs,brush guard w/5.5K winch.

1987 isuzu space cab
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Re: 2.3/2.6 qustion

Postby 1987 isuzu space cab » Sun Jun 08, 2014 1:27 am

Thank you man it help to have pople like you guide pople like
Me iam a hard headed at times
Ok well tell me somthink hear
the impules what boost could it take what the psi??
What can the bottom end take before it melted down
i know there 3 engine in the 4z family and know the 2.3 2.6
I thank the impulses. had a 2.4 or was it a 2.3 t1 or somthing like that
Anyway. I'm not lookin to find hard to find parts hear
i was goin to get a flange. cut and pipes. and have it built
if the deep dish pistion and 272 cam the way to go will it be good for a trubo as well o and what
Fule injector did the impulses run what the psi ??

thanks sorry for all the qustion man im trying to get the best of both worlds
power performance and mpg's

oldestisuzuist
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Re: 2.3/2.6 qustion

Postby oldestisuzuist » Sun Jun 08, 2014 6:25 am

The three engines in the series were the 2.6 4ZE1 (EFI), the 2.3 4ZD1 (carb'd or EFI) & the 2.0 4ZC1 (turbo EFI). The strong bottom end is essentially the same on all three. All also used essentially the same fuel injection systems. I don't know any more about the EFIs or the turbos except that they can be interchanged between the engines. You'll have to get advice from someone else as to what cams & other parts would work best with a turbo, but I have heard the Delta 272 cam works best with carb'd engines. If you are going to custom build the turbo see this link: http://forum.planetisuzoo.com/viewtopic.php?f=2&t=76814 for a start. The stock 4ZC1 parts are out there, but they are rare, there was an '89 T-Impulse in a Pull-A-Part in Moffet, OK a month or so ago, the turbo looked to be mostly complete but I don't know enough about one to be sure.
'78 Chevy LUV,1.9,4sp,headers,31's,SAS Dana 30,Dana 20,SOA rear w/Aussie Locker, body ROUGH, bought new 12/4/78. A pre-P'up?
'87 Trooper,2.3,5sp,headers,31's,ball joint flip & spacer,Aussie Locker rear,Superwinch hubs,brush guard w/5.5K winch.

1987 isuzu space cab
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Re: 2.3/2.6 qustion

Postby 1987 isuzu space cab » Sun Jun 08, 2014 9:01 pm

Thank you for ur help man
Now iam goin to start looking for more info
on the in/out's on all the set up. That i can find
and as for the cam cuts 272 it is widely used
Even with Honda d16 so if the fule injuncted Honda's can run them
i don't see y a fule injuncted I TEC.
couldn't run them as well
my truck is running a I TEC but i won't some other
intake manfold system becouse it just looks like a headache
if it starts atcing up but i don't won't a carb system it
time to stay with the efi just not the itec I'm goin to haft to stay
with it for a bit but my hope it to dump it all together. for a better setup

o yea the day my truck went down well 3hrs before. i just pad for a new winshild
the sad part is that was the only thing holdin me form geting my plates. funny how stuff works some times
Attachments
CAM00008.jpg
Before I pist off that valve

1987 isuzu space cab
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Re: 2.3/2.6 qustion

Postby 1987 isuzu space cab » Sun Jun 08, 2014 9:25 pm

You know there only so much one can do with
this before it becomes a problem lol
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CAM00128.jpg

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superman27344
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Re: 2.3/2.6 qustion

Postby superman27344 » Thu Jul 31, 2014 2:14 pm

where did you get that air intake from?
Lou Forrisi, 1989 Trooper aka "The Armadillo", 2.6 liter, 5spd

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Re: 2.3/2.6 qustion

Postby wesharris » Thu Aug 07, 2014 12:50 pm

Has anyone here ever put an msd ignition system on a 2.3-2.6 that has a 260-? Cam
1990 Isuzu trooper 2.6 5,speed new clutch new head and gasket msd 6al ignition blaster ll coil accell wires water pump rebuilt alt. rebuilt starter new belts & hoses deleted emissions

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15uzu
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Re: 2.3/2.6 qustion

Postby 15uzu » Mon Feb 23, 2015 11:04 am

Ok.....so first things first, the injection system on the impulses is COMPLETELY different to the I-TEC system on the E1. Don't event bother trying it. Also, forget using the C1-T turbo & exhaust manifold on the E1. The compressor profile is completely wrong for a 2.6L engine.

If you want to do it properly have a look on the australian ebay site and you will find a few people selling E1 turbo manifolds to suit T3/4 or T28 flange, both internal & external gated. Get one of these and a suitable turbo from a donor engine between 2.4L & 3.0L. Then get an interceptor style computer, some larger injectors and play to you hearts content on the stockcam.

One word of advice - install double valve strings to curve the float problem. That is why you put the valve through the crown of the piston. Also, don't be scared to run a higher static compression (around 8.3-8.6:1) with lower overall boost. Your working with a heavy vehicle that needs the torque that compression offers. Otherwise you'll have a truck which is a pig to drive.
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SteelJM1
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Re: 2.3/2.6 qustion

Postby SteelJM1 » Wed Mar 11, 2015 10:44 pm

Question: what is the static compression ratio when using old style 2.3 pistons with new style 2.3 head?
95 Longbed 4X2

oldestisuzuist
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Re: 2.3/2.6 qustion

Postby oldestisuzuist » Wed Mar 11, 2015 11:33 pm

As far as I know there is no old & new style 2.3 head & pistons except for maybe the old Impulse 2.3 pistons, compression is about 8.3:1, 8.5:1 for the Impulse. A 2.6 does have old & new style heads & pistons, old pistons with a newer head yields about 9.3:1.
'78 Chevy LUV,1.9,4sp,headers,31's,SAS Dana 30,Dana 20,SOA rear w/Aussie Locker, body ROUGH, bought new 12/4/78. A pre-P'up?
'87 Trooper,2.3,5sp,headers,31's,ball joint flip & spacer,Aussie Locker rear,Superwinch hubs,brush guard w/5.5K winch.

1987 isuzu space cab
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Re: 2.3/2.6 qustion

Postby 1987 isuzu space cab » Thu Mar 12, 2015 2:50 pm

Ill go with oldest hear you can buy flat top pinstion
To bumb your comprssion but then you get spirk nox or you can do what i did 20 over domes pistion in a 2.6 with a 2.3. Head still have spirk nox but my head was cut a lot in it life tho sady the the truck is now gone. I miss both my trucks

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15uzu
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Re: 2.3/2.6 qustion

Postby 15uzu » Thu Apr 02, 2015 7:41 am

Marle makes a forged flat top VW stroker piston which can be used in the 2.6 with an overbore. I used those with a large profile cam, double valve springs, tri-Y extractors with extended secondaries, 2.5" mandrel system & a K&N Pod filter on stock computer fuel & ignition maps naturally aspirated and it made my spacecab as fast as a GM sedan with the 3.6 Buick V6!
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