2.0L Turbo Specs

[sunrunner_pei]

GM 2.0L Turbo Specs

Materials

Block: Cast Iron
Cylinder Head: Cast Aluminum


Configuration

Displacement: 2.0L (122ci)
Compression Ratio: 9.7:1
Bore x Stroke: 86mm x 86mm (3.386 in.)
Firing Order: 1 - 3 - 4 - 2
Valve Configuration: Single Overhead Camshaft (2 Valves per cylinder)
Valves: 43 mm intake, 36.5 mm exhaust
Crankshaft: Nodular iron with 5 main bearings and 8 counterweights-Rolled fillets on crank and rod journals
Connecting Rod: Nodular iron, 143 mm long
Piston: Lightweight design, 8.0:1 Compression Ratio- 30.4 mm Compression height


Horsepower: 165 hp @ 5600 RPM
Torque: 175 ft. lbs @ 4000 RPM
Maximum Boost: 10 psi over barometric pressure
Minimum Controlled Boost: 4 PSI

[Night Wolf]

wow, that is rare when the bore and stroke are the exact same

I wonder is someone could make up a DOHC head for this engine, I am sure that would let the turbo kit work even better

[ritzard]

did you get thoes specs from my reply or did you find them online?

if you found them online wich site was it??
if it was from my reply cool!!

[Hybrid T2T3]

i found a place that will compleatly rework the head for about 800, i think its a little to much, but i need it , the head wont flow enough for my upgrade to make a diffrence.

portpros.com

oh yea here are the diffrent turbos that the put on the 2.0

year o.e. part#

87 466876

88 466876

88 1/2 465365

89 465749

84-85 sunbird oil cooled- 466204
84-85 sunbird water cooled- 465853

all the other years sunbirds are the same.

[Myetball]

It's not any new information but this is a page out of the owners manual.

http://www.digitalpose.com/mbr/511/19598/p/631187_1236229586651840581_vl.jpg

[Prospeeder]

so whats the name of the turbo? Like u know, to Turbo Grand Prixs have a Garret-T25

[ritzard]

the turbo stock is a t2

[Prospeeder]

oh alright, there pretty small then? whats the 0-60 times for a tubo GA, i looked and i havent been able to find one

[ritzard]

dunno somewhere i seen 15.6 1/4 mile tho if its right or wrong i have no idea but the first chance i get ill be testing mine and ill put up the times soon ill have my dyno run up.

[Prospeeder]

Got ur results yet Ritzard?

[ritzard]

lol no the car has yet to run reliable its currently back in the shop it might be awile b4 i get to test anything im haveing the worst luck with this car.maby one day it will be nice to me.

[Prospeeder]

hope u get ur car all fixed, my turbo gp needs a new crossover pipe, mine cracked, so ill be gettin on that soon, 425$ for it from Jeff M (fixed wont crack) or $1500 from GM (wich is still faulty and will crack again!)

[ga5speed02]

what year grand am whas this engin in. i never heard of it. but i would like to get my hands on one. it seems cool. and sinse i guyess its rear that makes it cooler

[Myetball]

I believe the turbo GA was made '88-'90. All FWD.

[ritzard]

i think 85+ grand ams are all fwd.

[ga5speed02]

thanks

[Mr.Efficiency]

You guys are missing out on a lot just reading through the 2.0 turbo forum you guys are missing out on a lot for this motor.
Go here <http://www.j-body.org> and check out the second generation forum, thats were most of the 2.0 talk is.
Also here <http://www.j-body.org/forums/read.p...2&t=44184#46302> this is a FAQ I wrote a while back.
And <http://www.lt3engine.tk> A site dedicated to the LT3 (2.0 turbo).
And as for DOHC there is a DOHC head for this motor, but dont gt your hopes up.....Vauxhall, Holden and Opel are still using the 2.0 block for some of there motors and they make a DOHC NA and turbo version of it they also have the SOHC NA version, I was looking nto getting the head and all the timming acessories rom one of these motors but but shipping will kill you since the above mentioned manufacturers are made out of the UK, I know I guy who is fropm the UK and makes regular trips there evry year so I'm looking into getting a fovor from him soon :D
If your going to do a searcg on it the DOHC turbo engine code is C20LET and the NA DOHC is C20XE and they came in cars like the Cavalier (not the american one) Calibra and I think the Astra but I'm not sure. Theres also a few message boards dedicated to these motors who are a big help in getting you the info needed to get the swap done, but you can find them for yourself ;)

[Prospeeder]

so currently, does anyone have a running, drivable, TGA that thay can/will/are/did take to the track?

[ritzard]

im not sure but they all seem to have some problems.

and about track times none that i know of.

[88Grandamturbo]

The reason that people have problems with these engines is the Turbo to intake manifold design. From what I've heard "overheating" issues. I am buying a intercooler to put on my GA off of ebay so hopefully I won't have those problems.

[Prospeeder]

Ah, no intercooler, compressed air heats up

[88Grandamturbo]

yes, definetly a problem....but now to get my hands on one of those c20XE heads by cosworth.....

[evorun]

I just bought a 1989 GA SE Turbo this week for $350. Funny thing is this is the FIRST 4 cylinder, FIRST Turbo and FIRST FWD car I have ever owned. After test driving it, I couldnt believe it. HAHA!

The guy I bought it from was cleaning it up for his daughter (first car). She didnt care that much for it, so he let it go. During the test drive he told me to take it easy, because the boost, for whatever reason was not being regulated properly. So after a mile or so, he said to ROMP on it a little so I could see what he was talking about. Sure enough, as soon as it would wind up, it would hit about 14-15 psi and "Put-Pow!" the ECU would cut the fuel until the boost came down. During that brief period of pedal smashing, it really surprised me! I couldnt believe all that tire spinning and 2nd gear tire chirping came from that little 2.0L. I had to have it. Now I own it.

I have a 1/8th mile strip about 2 miles from my house. As soon, as I work out the bugs and give it a good tune-up, I'll hit the track and come up with some times.

This is a STOCK 1989 Grand Am SE Turbo (2.0L) VIN "M"
Automatic
Grey with Grey/Black Interior

BTW if anyone needs any info out of the GM factory service manual for this year let me know, I now have a copy of it.

I'll post pics up soon. Take care.

[Wedge]

Originally posted by Night Wolf
wow, that is rare when the bore and stroke are the exact same

I wonder is someone could make up a DOHC head for this engine, I am sure that would let the turbo kit work even better

the sr20det off of a nissan is 86 bore and stroke and is also dohc..

[89GATurbo]

I was just wondering...

Why are there two compression ratios listed? At lt3engine.tk, it only lists 8.0:1. I was wondering where the 9.7:1 comes in play?

Does anyone have a problem of oil leaks? I've replaced just about everything except for the engine and transmission themselves, including getting the A/C back, and she hums beautifully at 5K RPMs, but my cam cover leaks, and my oil pan leaks. Not horribly. My mechanic (who does everything I don't feel confident about) said GM turbo cars always have oil leaks. Is this true?

And does anyone know why my "Check Gauges" light is blinking? It usually just comes on (not blinking) when somethings wrong (like low fuel), but now it CONSTANTLY blinks.

[ritzard]

Originally posted by evorun
Sure enough, as soon as it would wind up, it would hit about 14-15 psi and "Put-Pow!" the ECU would cut the fuel until the boost came down.

mine did the same thing ended up being the boost silinoid there are 2 lines on 1 side 1 on the other but only 1 on each is used i took the line off the side with 2 and moved it down to the second line in and it controlled the boost normally. hope you understand what i mean if not ill try 2 explain better of go take pics of the silinoid and show you what i mean. not saying thats the problem but it waz my problem.