3.4L build up for isuzu trooper.

[onebadtrooper]

hey guys, i have a 89 trooper with the 2.8l. its a great motor. it now has about 275,000 miles on it and it still doesn't burn oil. i have even been running 35" tires with stock gearing, and its still not too bad. i have new 5.38's but haven't installed them yet. i'm going to swap in a 3.4l when my 2.8 goes. alot of trooper owners are/have been doing it. i was just wondering if you guys could help me out with some things. i want a good low end- mid range power engine. and i was just wondering what you guys would recomend, for power gains. i want to get as much power as i can without going crazy with the price. i don't know that much about internal engine parts but i'm tring to learn. i now have a 2.5" exhaust up to the manifolds, and a snorkle which adds alittle boost at high speed. but not much other than that.
i'm going to have a 93-95 3.4L from a camaro, with a 2.8L intake manifold. on top of that there will be a 4.3L throttle body, the intake will be boared to match the throttle body.

thanks
chris.

[geoffinbc]

Your on the right track. Take a look at my site. You will find alot of info. Read my how-to's and they will basically walk you through the process of the swap and the 4.3L throttle body and some other extras. Now some Isuzu's used a Drivers side starter. But I think that was only with The 3.1L so I think you are ok. But just check and keep that in mind.

Also join s-series.org for more application specific information. I would estimate about 50% of the 60*V6 owners have done the swap by now.

[onebadtrooper]

hey thanks man, and thats a great site you have.! i just have a few more questions. what would be a good cam/ rollor rockers, for strong low-mid range power? and what about HO heads would they work with this setup? are they worth it? i'm also going to go with under drive pullys, and pacesetter headers for the camaro. how much power do you think i can get with this setup? i'm hoping for around 200hp. and i do have to move the starter but its ok. btw thats a nice truck you have man!!! i like the engine bay. it looks clean.
thanks
chris

[sharkey]

the ho heads were from the 80s and were high output on carbrated cars. in 85 when pretty well everything switched to efi, the ho heads were on everything. the differance was 1.72/1.42 valves vs 1.60/1.30 on the non ho heads. so long stroy short, the 3.4l camaro has the best gen 1 heads you can get.

[geoffinbc]

Yea if you have a larter than 86 engine you will have HO heads. Not to worry everything with iron heads will accept your intake. Thats what makes the swap such a good choice. It is literally a bolt in.

With headers and a bored intake and a good cam (I suggest Comp 260 or the GM performcance crate cam) you will see 200 HP. Also keep in mind you MUST change to the GM performance springs retainer and locks. I used the Crane Cams Gold Race roller rockers. They are a little over kill but are very light and high quality.

[onebadtrooper]

hey thanks guys. and thanks for the info on the heads, i didn't know i had the ho heads.
i just looked around for the comp 260 cam but can't find any info, do you still have the part numbers? and for the crane cams, roller rockers part numbers. and where would you get the gm performace springs? sorry for all of the questions man. thank again!!

[onebadtrooper]

i forgot a question. should i get 1.52 or 1.6 rolloer rockers? and the stud is 10mm right?

[Will'sFiero]

Why not use a 3400 (aluminum heads)? Comes factory with as much power as it's practical to get from modded 3.4 with iron heads.
Doesn't the bellhousing have a place for the starter on either side?

[onebadtrooper]

if i were to do that i would have rewire my engine harness. and if i was going to do that i would rather drop in a 350. my starter can only be on the drivers side because of the bellhousing. i would love to be able to use the newer heads though. thanks

[Will'sFiero]

I was pretty sure there was an S10 bellhousing or something similar with starter cutouts on BOTH sides...

Wiring for DIS isn't THAT hard...

[geoffinbc]

Comp 260H cam is here

http://www.powerandperformancenews.com/store/merchant.mvc?Screen=CTGY&Store_Code=CC&Category_Code=16-CAM

Crane rockers here

http://www.cranecams.com/?show=browseParts&lvl=4&prt=108&action=partSpec&partNumber=25759-12

Get the GM crate engine springs locks and retainers from your dealer. You can also use crane or comp equivalent.

Only 1 bellhousing came with starter holes on 2 sides. I forget which engine it was. Wiring our trucks for DIS is not easy we would need a whole donor vehicle to get the ECM and wirning harness from. Then add in the cost of aluminum heads. The 3.4L from a donormaro is a direct bolt in. That is why it is so popular. If you were to take on a more a adventurous project then you could do aluminum heads. But then you need a high pressure pump and all the rest of the bits to support SFI and DIS

[Will'sFiero]

Oh yeah... you guys are TBI... sorry. That is a lot more work.
I was thinking of changing from MPFI+dizzy to DIS

[614streets]

I thought maybe that bellhousing was from the citation x-11? I dont have my book.

It would be alot of wiring but a 3400 trooper would be nice. A 3.4 with a 4.3 TBI should have decent usuable power and wouldnt complicate installation at all.

[geoffinbc]

Citation was FWD was it not.? I dont think that will work. From my understanding that belhousing with dual starter holes came from a Camaro of some sort.

But since you are doing the swap I would look for an S-10 belhousing and switch the starter over and use an S-10 or the 3.4L Camaro starter. I think that would beat drilling and tapping the block. But whatever floats your boat.

[onebadtrooper]

hey thanks. the only problem is that my tranny is one peace, i don't have a bellhousing. so i have to drill and tap. but its no big deal. thanks again!!!