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3900 vs or duramax in iroc??!!

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Old May 4, 2011 | 04:29 PM
  #1  
fiero377ci's Avatar
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Car: 85 iroc
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3900 vs or duramax in iroc??!!

i realize it well away from the norm but i think i want to either drop a 3900 from the fwd cars with dod and vvt, if i went this route it would def need a turbo. or a duramax, ya its a boat anchor, but imagine the gas mileage, and power, plus the cloud of black smoke just cause my wife hates it.
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Old May 4, 2011 | 05:17 PM
  #2  
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Re: 3900 vs or duramax in iroc??!!

if you could pull the money together to do a duramax swap i would go for it, but a cummins would be so much easier to incorporate into a third gen, it would be cheaper and you would have the same amount of power
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Old May 4, 2011 | 05:45 PM
  #3  
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Car: 1985 IROC-Z
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Re: 3900 vs or duramax in iroc??!!

you are talking about serious amounts of fabrication work(FWD) if you can do it yourself, if you cant do it yourself, that ton of money would be more suited towards a new car.
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Old May 4, 2011 | 06:13 PM
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Re: 3900 vs or duramax in iroc??!!

If you want a cheap complete duramax engine with an allison tranny call Sheldon's Auto Salvage in Viroqua WI. I was there about 6 months ago a few buddies of mine work there and were willing to sell me the complete setup for 900 bucks. Far as I know nothing has been taken off the truck yet. Complete sideswipe.
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Old May 4, 2011 | 06:19 PM
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Re: 3900 vs or duramax in iroc??!!

I'm pretty sure I've mentioned throwing either a Duramax, Ford SOHC 6.8 V10, or a BMW 6.0 V12 into the IROC before, since I was kind of getting bored of the idea of another SBC powered Camaro. I'm very sorry if I gave you any ideas.

There's a Duramax powered 4th gen on Youtube. Just talk to that guy if you actually have the money to get it done.
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Old May 4, 2011 | 07:22 PM
  #6  
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Re: 3900 vs or duramax in iroc??!!

I like the idea of a diesel in a Camaro. Diesel's have unreal torque, which is why they are used in big trucks.
My Camaro also has a truck motor, and if you have a TBI 5.0 so does yours. The L03 TBI is the motor GM used in Suburbans and P/U trucks. All GM did is drop it in the Camaro. So that torque for hauling trailers and boats is great in a 3,300 lb car with a stick!

But if you have $dough$ for the fabrication required to install a diesel in your Camaro, you might want to go electric. If you want to see what you can do with a street legal electric, take a look at this video. http://www.youtube.com/watch?v=zLjnR...eature=related
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Old May 4, 2011 | 07:32 PM
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Re: 3900 vs or duramax in iroc??!!

A twin turbo big block would also have unreal torque.
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Old May 4, 2011 | 07:49 PM
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Re: 3900 vs or duramax in iroc??!!

Eh, TT big block is kind of a waste - you don't need all that displacement if you have forced induction.

I want to see a nitrous'd/geared 3.6 LLT motor in one of these. I really wouldn't do a 3.9 V6 - not enough potential.
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Old May 4, 2011 | 07:50 PM
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Re: 3900 vs or duramax in iroc??!!

Then you have even more displacement on top of the fact that it's a big block. Seems completely logical to me, if someone wants massive amounts of power, or just a very high powered daily driver. They could run a big block at low boost, very mild cam, have excellent street manners, and gobs of power when they step on it.

I'd TT a 572 crate engine if I was loaded.
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Old May 4, 2011 | 08:00 PM
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Originally Posted by mjwadams
My Camaro also has a truck motor, and if you have a TBI 5.0 so does yours. The L03 TBI is the motor GM used in Suburbans and P/U trucks. All GM did is drop it in the Camaro.
Not true. Truck engines had flat tappets, Camaro engines had roller lifters. Accessories and emissions were also different.
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Old May 4, 2011 | 08:07 PM
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Re: 3900 vs or duramax in iroc??!!

well considering i havent taken a car to a shop for anything b4 id say i could handle it, i dropped a s1 sc 3800 in a fiero, along w a camaro 3.4, 3 small block s10s, a small block datsun. among other things. anyway u mention tbi but its an iroc tpi. and the whole sbc thing is so way overdone, although there great motors. i was thinking that 3900 would be a swell idea i mean it puts out more power than any factory third gen, might be lackin on some tq. and the fab parts dosnt seem to elusive. the starter will have to be moved to the other side for one, the bellhousings different but maybe a v6 camaro t5 would handle it, maybe not. on the other hand as far as i know a duramax will bolt straight to any gm tranny, i guess they wouldnt handle it though. how much bigger is a duramax vs cummins?
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Old May 4, 2011 | 08:09 PM
  #12  
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Re: 3900 vs or duramax in iroc??!!

i just saw that great idea about the bmw v12 i actually have one although its connected to an auto, car was a total rust out for 150. havent heard it run but turns fine, think its late 70s
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Old May 4, 2011 | 08:17 PM
  #13  
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Re: 3900 vs or duramax in iroc??!!

dang i just looked it up and they didnt make em till mids 80s, i never saw the car, my buddy got it chopped it and left the motor nd trans at my place, hope it wasnt jag im kinda thinkin it is now. oh well i guess 3900 is back at #1 spot
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Old May 4, 2011 | 08:40 PM
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Re: 3900 vs or duramax in iroc??!!

Originally Posted by five7kid
Not true. Truck engines had flat tappets, Camaro engines had roller lifters. Accessories and emissions were also different.
Since you got on the topic, do you know exactly when rollers were introduced? My 350 (if the heads are original to the block) was made sometime between 1976 and 1979, and has a flat tappet cam.

Originally Posted by fiero377ci
dang i just looked it up and they didnt make em till mids 80s, i never saw the car, my buddy got it chopped it and left the motor nd trans at my place, hope it wasnt jag im kinda thinkin it is now. oh well i guess 3900 is back at #1 spot
I don't think BMW made any V12 until the early-mid 1980's. So, that's right.
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Old May 4, 2011 | 11:32 PM
  #15  
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Engine: L92/LQ4 (both w/4" stroke)
Transmission: 4L80E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
Originally Posted by Shadow Z
Since you got on the topic, do you know exactly when rollers were introduced? My 350 (if the heads are original to the block) was made sometime between 1976 and 1979, and has a flat tappet cam.
1987 model year.
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Old May 4, 2011 | 11:34 PM
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Re: 3900 vs or duramax in iroc??!!

I thought it was sometime between 1985 and 1990. I read an article on it a while ago.
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Old May 5, 2011 | 06:42 AM
  #17  
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Re: 3900 vs or duramax in iroc??!!

ya so its def a jag, and considering people toss the v12 in favor of a chevy, theres not much point in pullin the chevy for a jag. i originally was thinkin it would be a decent for a realistic lambo replica fiero mounted longitudal, thats serious dough to put together though. im getting out of the navy most likely next month should have some extra buck left over after payin off the syclone.
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Old May 5, 2011 | 10:59 AM
  #18  
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Re: 3900 vs or duramax in iroc??!!

That's why I'm keeping it simple and sticking with a small block Chevy. I tore my engine down, took the oil pan off, and there was a 4 bolt block. Just have to have it pressure tested and magnafluxed for cracks, and I'm good to go.
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Old Feb 22, 2012 | 08:45 PM
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Re: 3900 vs or duramax in iroc??!!

https://www.thirdgen.org/forums/engi...dgen-swap.html

doing it
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