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Twin Turbo 3100?


Guest RedCutlassSL

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I have an intrepid also 99 3.2L and the set up of the motor is common. It was done on all audi 2.2 and 2.3L motors 5cyl motors (I had a 2.2L turbo audi 5000 so I know). I am sure it is also done on the 2.5L acura 5cyl motors.

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I believe they are mounted like a RWD, I owned the 92 Vigor for some time, (5cyl). I just can't totally remember. That was a car I never spent time under the hood. I am almost certain it was.

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Acura Legend had a longitudinal FWD engine/tranny too.

The weirdest setup I've ever seen was the 80's body style Saab 900's.

The engine was longitudinal, but backwards. Tranny in the front, engine facing the firewall. It's weird to see the belts and pulleys next to the firewall. I guess that's why the hood also opened backwards on that car.

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I'm well aware of this, I probably worded it wrong. It was done on a DOHC and the guy ground down large sharp edges around his cams, intake and exhaust. Here...pics.

 

http://www.brian89gp.com/images/engine/head/1.jpg

http://www.brian89gp.com/images/engine/head/DSCF0056.JPG

http://www.brian89gp.com/images/engine/head/DSCF0006.JPG

 

It was work on the combustion chamber, sorry I didn't clarify that.

 

I'm not sure what 3100 or 3.1 heads look like but I imagine you could get the same result. I'd be very careful though, take too much material off and you could weaken the head considerably. Hell, i don't even know what the 3100 heads look like :P. You also have to worry about messing up flow characteristics if you take something off in the wrong place. Thats why these are a SPARE set of heads, if I fubar them I can always put the stockers back on.

 

For CR, I took a mere 4-5cc of metal out and that dropped the CR from 9.25ish to 8.5:1. Quite a pleasant suprise.

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With this intrepid, how is the trans done then, with the engine mounted normally? Is it smaller?

 

This is the 3.5L ( I think, pretty sure). I saw that supposedly only R/ts got them, and ES had the 3.2, but this i am sure (and saw it) is a 3.5, 250 HP

 

Jon

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Longitudinal FWD engines usually curve around on one side or the other, and are adjacent to the engine oil pan. The oil pan is usually shaped to allow an intermediate shaft to fit under it.

Even a north-south FWD engine's tranny has to be fairly compact, so I doubt they're much stronger. The only really strong FWD trannies would be the humongous ones in the 69-85 Cadillac Eldorado/Seville that bolted up to Caddy big block V8's. Those cars had 10ft long hoods and could house a giant transaxle.

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no they put the twin turbo's on v motors...that way they can get the same air volume while running a smaller turbo..yes the smaller turbo spools up faster...but the idea is more about balancing the boost between the heads...it's hard to get proper boost balance out of a v motor and one intake and one turbo...so they run 2 indpendant intakes and 2 throttle bodies. and 2 turbos....thats why you dont see twin turbos on 4cyl and streight 6's

 

I have seen 4 turbos on a v-8, one turbo to 2 cylinders. I believe it was a Bugatti exotic car. So it is possible to run a 4 or straight 6 with 2 turbos I would say...

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no they put the twin turbo's on v motors...that way they can get the same air volume while running a smaller turbo..yes the smaller turbo spools up faster...but the idea is more about balancing the boost between the heads...it's hard to get proper boost balance out of a v motor and one intake and one turbo...so they run 2 indpendant intakes and 2 throttle bodies. and 2 turbos....thats why you dont see twin turbos on 4cyl and streight 6's

 

Supra has a striaght 6, and one of the other tt cars (i forget which) is a 4cyl. The reason for twin turbo is to increase drivabality, 2 small turbo's will take less to spool and thus less lag then a large single turbo that pumps the same amount of air as twins. There are high hp twins out there but generally a single large turbo will produce more hp easier but at the expense of a great deal of lag.

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3.5/3.2L same thing 3more liters and 25-35more hp. The transmission is mounted on the side of the motor just like a normal fwd just he engine is so friggin huge it has to be mounted longitudal or it won't fit.

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actuly no.... the 3.5 and 3.2 are not the same motor...the 3.2 is a mitubishi design and believe it or not the 3.5 is a hold over from amc when chrysler bought them...... and the 3.5 mounts like a rear wheel drive motor pullys to the front. it's got a fairly large snubbed tranny..the engine is just shove way far forward...thats the great thing about electric fans...the reason the cars hoods dont look so long is the cab forward design they brag about...the front window and dash are actuly pushed out over the engine by about 3 inches.....which means it can be a real pain to work on the back of the motor..eg valve cover leak...DOH!

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Longitudinal FWD engines usually curve around on one side or the other, and are adjacent to the engine oil pan. The oil pan is usually shaped to allow an intermediate shaft to fit under it.

Even a north-south FWD engine's tranny has to be fairly compact, so I doubt they're much stronger. The only really strong FWD trannies would be the humongous ones in the 69-85 Cadillac Eldorado/Seville that bolted up to Caddy big block V8's. Those cars had 10ft long hoods and could house a giant transaxle.

 

My friends mom has an intrepid with the longitudinal FWD set up and is drive axle goes THROUGH the oil pan!!

 

Robby

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My friends mom has an intrepid with the longitudinal FWD set up and is drive axle goes THROUGH the oil pan!!

 

THROUGH! :yikes: Sounds like a service headache!

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this is the 3.5L 4638engine-med.JPG and this is the 3.3L 1610Mvc-004s-med.jpg

 

my engine the 3.2L is identical to the 3.5L with only the badge being a little larger. Everything in the engine bay, belts, cams, covers etc... are all the same. The engine bays look crowded and hard to work on but they are not. I have done work on them already and getting to the valve covers are no problem since the engine is longitudal. The only b/s things I have seen so far are inadequate braking for such a large (3880 with me in it) car, the weatherstripping is totall garbage (mine falls down all the time with only 26K on it), the two huge cats coming right off the exhaust manifold leading to a another (third) cat leading to some cheap ass piping thats already rusting out. Its basically a fake me out luxury car. :D

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I like the symmetry of the longitudinal setup.

 

One unrelated question I've always had about the Intrepids (since I looked at a 1998 several years ago). How do you get the battery out? I remember it was way down low and I couldn't even hardly see it.

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yeah thats another location of the battery is another jack ass move! IMO and 55,000 <------ (litterally) DO NOT BUY A 98+ intrepid, concorde, LHS, or 300M. You will be sorry. They have a sudden loss of steering resulting in accidents and Chrysler is doing nothing about it. Whats scary is that they are used for rental cars. I am getting rid of mine ASAP :evil: !

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yeah thats another location of the battery is another jack ass move!

 

I have a 2001 Intrepid sitting in storage with my GT. The battery is a pain in the ass to get out! The car is fun to drive though. It has a good passing gear, and decent power for a 2.8L. :)

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got to this website! http://intrepid.clan-510.org/ and this isn't hype i have a 99 with the braking and steering/wobble and braking problem, my buddie has a 98 concorde with the identical steering/wobble and braking problems, my co-worker has a 99 LHS with the same but his steering rack totally went out, my other buddy has a 300M that the brakes keep squealing even though we used a ton of anti squeal, new rotors (then resurface), new $89 top of the line Dodge no squeal brake pads, new calipers (the ones replaced were fairley new). We all have the same conclusion GET RID OF THE MF! The concorde has the highest mileage with 67K, I have 49K, the LHS has only 26K, the 300M has 15K. Plain and simple POS!

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you better look again at that 3.2 vs 3.5 thing.... the 3.5 is a 2 INTAKE 2 THROTTLEBODY DOHC motor ...and the 3.2 is a 1 intake and 1 throttlebody sohc motor.....and just because the altenator and ac compressor is in the same place dosen't mean it's the same motor there is only so much room and places to put things under that hood.. the heads off the 3.5 will not bolt to the 3.2 block...and there is no way the timing belt is the same as you say...dohc vs sohc..think about it.......I mean your picture backs up everything I just said...they dont look alike at all... and that badging you are talking about..on the 3.2 it's cast into the intake...on the 3.5 it on a piece of plastic covering the fuel injectors...the manifolds are thoes huge honkin silver things sitting on top of the valve covers on the 3.5....also heads on 3.5 are like 7-8 inches across...the heads on the 3.2 are like 4-4.5 inches.....

 

I dont know how much more different they motors can get

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hey what year was your intrepid? the reason I ask is that trw came up with some new bushings to fix the problem the cars were haveing...I dont know what chrysler was thinking using a non oil resistant bushing for the tie rod connector and the rack mount..but i can tell you it wasn't durability...the trw units completely fix the problem...polygraphite ..no flex and no side shifting anymore... thats on the 93-97 models like my father has.... hell his car can out steer my lebaron now :(

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whats there name and website? I am going to have to keep my car for at least 6 more mos. so I might as well make it safe for my fam to ride in.

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Trw? I'm not sure what thier web site is...but you can get TRW parts at almost any auto parts store....they are one of the biggest aftermarket suspension and steering component manufacturers..(heh today I can spell go figure)...I know that both autozone and advance auto carry TRW if that helps....my sure you get the ones labled either heavy duty or renforced or redesigned..it's one of thoes 3.... on the tie rod connector the factory unit it is a one piece bushing that has to be pressed in and it's a real bitch and worthless...the aftermarket unit is a 2 piece poly bushing set...also make sure you get the poly rack mount bushings

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