0 km 2.5l(turbo swapped tbi)-not staying timed

[ShadowEs88]

Ok as the situation has it i was blessed with a blown 2.2l turbo engine when i bought my car i was forced to swap my engine out(luckily I get dodge parts for next to nothing and a free brand spanking new 87 2.5l TBI block which i decided to put all my 2.2 turbo parts onto it except for the garret t1 turbo which ass the necessary accomodations were made to make it a turbo 2.5L spec .
1989 sundance 2.5L turbo 2 computer
2.2 wiring harness
1987 tbi 2.5 block
2.2L turbo cam with 2.2 cam gear
1988 distributer gear(i thought this might have been the problem that the teeth could have been slightly different on the 2.5L and the 2.2 but i verified they were the same when i ordered the 2.5 gear in

the only thing that was changed from the 2.2 gears was the gear that connects to the crankshaft which propels the belt this was replaced with a 1987 unit because the 88 2.2 wouldnt fit the shaft

now when this car is timed correctly for a short period of time it SCREAMMS(caps for max emphasis) but the car quickly runs itself out of time foward a few degrees, so my question is what could it be?is the 2.2 distributer different from the 2.5 one? is my 87 2.5 timign belt not correct?...if you need to know anymore things about the car to properly diagnose it I will respond immediatly thanks

-WILL

[Screamin4banger]

you put the 2.2 turbo reciprocating assembly (crank, rods, pistons) in a 2.5 tall-deck block?
This is what you are saying?
Whatever...

If you only care about losing time... you shouldn't have a problem if you used the gears and belt from the 2.5... make sure that the cam gear and i-shaft gear are absolutely identical. Use a 2.5 crank gear too.

I prolly would have thought about having the machine shop deck the F outta that block to give it the 2.2's deck height.

[ShadowEs88]

no no its all 2.5 gear in the engine

[william]

What do you mean by "runs itself out of time foward a few degrees"? Cam timing? Ignition timing? How are you measuring this? Also, what is a "short period of time"? If you can explain whether you are talking about cam timing or ignition timing, as well as how you are measuring the change in timing, you will be much closer to getting an answer.

[moparfwdsleeper]

broken I-shaft or oil pump gear?

[william]

Quote:

Originally Posted by moparfwdsleeper broken I-shaft or oil pump gear?

I had one of these go, what a maddening thing to diagnose the first time.

[ShadowEs88]

ok well, when i set the timing up with the cam how its supposed to be and the (distributor pully?) and the cranksahft pully correct,then throw the belt on, i set the timign to 12 degrees advanced or whatever its supposed to be cant remember exactly right now,but it will advance within a minute to 13,14, degrees advance and begins detonating harsh

[22dodge]

Well, this seems obvious. 1987 crank pulleys were square tooth. All 1988 and newer engines have round tooths. So are you mixing?