90-93 compatible with 94-96

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willmoodom
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Joined: Sun Mar 07, 2010 7:04 pm
Car: 1991 Q45

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Hows everyone? Weve discussed briefly at times what on 94-96 will fit 90-93 model q45's. What ive done thus far is the injector/rails, door lock mechanism, sunfoof frame and at the a** end of an interior swap. I had that nasty tan and am switching to grey. Now im looking into hubs and links or arms. Reason is mines have quite a bit of rust. Surprisingly, all the rust on my car is located on the replaceable parts such as the links and hubs. Frame looks very good. Slight surface rust. So does the links and hubs fit 90-93 Q's? Does the rear subframe fit? What about window or door trim? I assume the short block is exactly the same even though the heads are different? Ill try to source another 92 transmission to rebuild. Anyone have any input on this subject?


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Q451990
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As far as I know, the suspension is identical, and I'm pretty sure you're correct on the engine in terms of the short block. Where they really differ is in the electronics and interior.

Heath

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SanCarlosQ45
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Just as a note the tension rods are different. The 90-93 are about a quarter of an inch shorter. I had one of those "damn it" moments under the car when one of the tension rods that I put ES poly bushings didnt fit. The one that didnt fit came from a 92.

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elwesso
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Very interesting, never would have guessed the tension rods were different!

Probably out to check the parts book to be sure..

willmoodom
Posts: 151
Joined: Sun Mar 07, 2010 7:04 pm
Car: 1991 Q45

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thanks for the heads up on the tension rods. this is my 92 as it sits right now:Image
i have many ideas in mind but the goal is to bring it back to its luster with some upgrades to improve performance, comfortability and reliability...........hopefully. i love this car. the way it rides though a little soft due to needing bushings, especially that one at the front of the rear subframe. i love the way it sounds and for a heavy car, it moves like it's a thousand pounds lighter. my reason for asking about the compat of the two models is , though my frame is free of any heavy rust, just light flecks, my removable parts like hubs, links and arms are peeling from it. these items need replacing. and in the pick and pull, im seeing 5-1 ratio of 94-96 model year q45's.
so far what ive done to the car is topend rebuilld consisting of hoses, sensors, 94 injectors and rails,VC's and plugs aswell as guides. recently got the transmission shifting into 4th and now able to manual shift. turns out the inhibitor/range switch wires were melted together and the reverse lights wires were pinched, hence no reverse lights. asked for advice some time ago about the transmission shifting problems. one person swore to GOD the transmission was toast and the other one advised me to sell it and get a 94-96 :tisk: so if your transmission is shiffting funny, check your switch on the side of the transmission, wires and all before giving up on it. now even though she shifts pretty good, i still feel its a tad bit slow going into 4th and lockup. no telling how long the previous owner drove the car like that. im thinking solenoids need changing. but first my plans are to change transmission fluid, external filter and add transmission plate/fin cooler this weekend. ive installed the nico ecu, 94 tcu, and am at the a** end of a interior swap to grey 94-96 and a 94 sunroof frame. original frame was seized from rust due to leaks now fixed. my only turn off about this car is the fact you have to do a lot to do a little in repairs. i mean VC's required the removal of the whole top end. luckily i was already doing other stuff. oil pan requires a partial lift and seperation of the engine cradle? i dont like it. recently paid to have the rack swapped out becuase i saw it as a b**** to do on the ground not to mention the possible rust buildup giving me problems.good thing is it only cost me $200 for the swap and $170 for the rack and z32 bushings. what i want to do is refurbish the suspension parts including sub frame with 94-6 parts. get new blue shocks, converted to air bag springs. get me another 92 transmission and rebuild with some level 10 goodies and rebuild the short block. ive read on here people saying the engine cant be rebuilt. if the short block does not need machine work, why cant new bearings and rings be installed?? everything else is gaskets and hardware torqued correctly. is that really more expensive than a jdm engine? i also want to play around with my lighting such as led tails, markers and projector headlight. but im still trying to decide if i want to swap the front end over to 94/6 or leave it be. btw, does anyone know the cfm rating on the mechanical cooling fan? mine is off, you guessed it, a 94' :gapteeth: some of you probably feels i should trade for a 94 instead. why? my car is payed for, i know everything wrong with my car, i drive it everyday, and the 94-96 loses a bit of that hotrod edge with the transmission change and other things.

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elwesso
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doing bearings and rings would be a good plan. you would definitely want to do it before the bearings go out though because you cannot get oversized bearings for the VH I believe. I know that's an issue that a lot of the swap guys have. But a re-ring and a bearing would be a nice freshening up, just a lot of work to take everything apart. Fortunately the cams seem to last a long time so you don't have to worry about cam journals failing.

willmoodom
Posts: 151
Joined: Sun Mar 07, 2010 7:04 pm
Car: 1991 Q45

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My thoughts exactly. Though I still drive it. What I want to do is find me a good short block off a wrecked Q at the pick and pull and build that up along with the heads and at the same time rebuild a spare transmission with some level 10 goodies. That way my car is'nt sitting for too long and I can take my time. The heads undoubtedly can use a cleaning and maybe new lifters. I read that the lifters have some kind of plastic seal. Ill beadle to double check that when the time comes. Anyhow, if the 94-96injury block is the same as the 90-93, using that would be better if for no other reason than assurance of lower mileage than the 90-93. Can anyone verify the part numbers for piston, rods and crank are the same?


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