My brother in law has a 84 z28 with no motor we just bought a wrecked 92 rs for parts he wants to put the motor in his 84. Will the 92 harness hook up to the 84 computer and if not will the 92 computer work in the 84. He wants to keep the fuel inj system.

 

just pull and install everything from the donor car

 

i noticed on the computer on the 84 that there is some wires that go over to the driver side of the car under the dash and didnt know if those wires would hook up the same to the 92 computer

 

just use a carb K.I.S.S.

 

if it was me i would but he dont want to buy anything and we have everything we need on the other car

 

gotcha... then strip the 84 completely and only use the 92 stuff... your swapping in the 92 tranny also right? just swap the 92 dash in as well & dont forget to swap the fuel tanks too

 

y would i have to swap tranny's

 

you dont but your 84 tranny is a mechanical speedo and the 92 is electronic... so swapping the tranny is easier(read: "cheaper") then buying conversion pieces to make your speedo work... not to mention that if it is a 700R4 then the 92 is an upgrade in strength (upgraded in '87+) oh yeah youll need to swap over the 92 flywheel/flexplate to fit the 1pc rear main seal of the 92 engine as well...

 

if i just swap out the motor and computer would it work. He said the 84 tranny has been built up so its propably better than the new 92 tranny. The 92 has a chip in the key if i put the 92 computer in the car and use the 84 steering wheel colum will it let it start. And will the gauges read right

 

the speedo will not work without an adapter i know they sell it i think its around 100$... it may be possible that you can switch the mech VSS out for the elec vss(vehicle speed sensor) but am not sure about that... as for the other gauges i do not know but i know that it will work if you swap the whole dash from the 92 in. im sure its possible and im sure someone else has done it, try a search for tbi swaps... the 92 gas tank contains a different pump then the 84 which is why i said to swap that... you may have to get the vats tuned out in the computer, again im not sure so hopefully someone else will chime in and help btw id get details on exactly what was done to the tranny... the 87 up 700r4 is a better starting point
**you know now that i think of it... if you keep the 84 gauges then the 84 mech speedo will work... but i dont know about the other gauges and i doubt the vats will let it start... we really need someonelse to help here
again if it was me(and its not) id swap over the whole dash and column from the 92 and youll know it works and wont have any splicing/tuning to do

 

There are many, many differences between '84 and '92. As mentioned, the electronic speedometer and in-tank electric fuel pump. The fuel lines are different. The chassis harnesses are different. The VATS that you noted (which is tied to the computer - and, no, you can't use the '84 computer to run the '92 engine {unless you're a computer wiz}), although the VATS can be by-passed. The engine cooling is different. The engine harnesses are completely different.

But, yes, you can swap out all that stuff and run the '92 system in the '84. Switching dash and all is probably your best bet. Basically if they're different, use the '92 parts.

You can swap the VSS from the transmission to the cable speedometer drive, but the computer needs the VSS signal - so you'll have to do some rewiring to get the VSS signal from the back of your '84 speedometer to the computer. If you're willing to do things like that, then yes, you could use the '92 engine/harness/computer in the '84 without the VATS, with the '84 transmission with the VSS signal from the speedometer. But, you will need the '92 fuel system (there was no EFI from the factory in '84).

I would also vote for the '92 transmission. "Built" can mean all sorts of things, and is usually more talk than reality.

 

thanks for the help guys. I talked to my brother n law and he said screw it we dont have time to do all that so we're just goin to K.I.S.S. and put a carb on the motor.

 

it will be way easier thats for sure and you will gain performance over TBI, if its tuned right MPG loss should be barely noticeable if there is any... look on craiglist and the classifieds for used intakes and carbs... and youll need a distributor too... you should be able to sell parts from the 92 to offset the cost of the new parts, get everything used that you can and save$$$

 

while your at it throw a better cam in there and some new springs

 

With swirl port heads?

A little more cam than stock, maybe.

 

LT1 cam no more... itll def wake up with a carb(and no tune required) and why not seeing how cheap they are

 

Picked up a edlebrock carb yesterday that was sent of to some guy that rebuild it and put his name where the edlebrock sticker used to be (cant think of it right of hand) and a good 350 block and set of fresh heads. So wat would be the biggest cam i could get without redoing the valve springs there brand new. And intake wat would be a good one. Thanks for the help guys

 

performer or equivalent intake
stock springs=stock cam, maybe an L98 cam but thats about it, might give 10-15hp idk if itd be worth it,
what heads btw???casting #?...
sounds like you might as well just part out the 92,,, but try to use the serp drive setup if you can its a nice upgrade from vbelts

 

The serp system switches accessories side-to-side, changed electrical connectors, etc. While it is a better system, it doesn't fill the "easy" bill.

 

yeah i kinda figured that but it doesnt sound like he has anything else to use

 

i hear poeple say they put a RV cam in there motor. What is that ?
Heads are 882, would like some double humps but we was told they raise ur comprasion up and needs better gas (91) with fuel prices we would like to stick to 87.
Called a race car buddie tonight and got a whole bunch of pulleys and brackets for accerise so i think i can make something work.

 

so are u using the 350 or the 305? if your using the 305 then an LT1 cam from an fbody is a better choice then an "rv cam" RV cams are also usually(correct me if im wrong) not hydraulic rollers... but if its the 350 then its a completely different scenario anyway... what year is the 350 block? what is it from?? those heads are from a 350 if im not mistaken, your '92 305 came with swirl port heads (as 5.7 stated) with 58cc combustion chambers, which gave the 305 9.3:1 compression... the only other factory heads that i am aware of that came with 58cc chambers were L69 heads/ "416s" from 5.0L tpi engines and "113" aluminum L98 corvette heads... anythingelse is gonna be at least 64cc and drop the 305s compression well under 9.1 again if your using a 350 those numbers are useless... good deal on the accessories!! were they free? even better! if you need cheap springs to work with a LT1 cam(.460" max lift) use these http://www.competitionproducts.com/H...uctinfo/98111/ btw i ran 87 octane all the time in my LG4 305(9.3:1 compression) it ran better with 89+ but 87 would work fine for commuting) if your looking for gas mileage just use the 92 305 block and heads, stock cam, find a performer style intake for 87-95 iron heads and throw a smallish(600-650cfm) carb on it with headers and good exhaust, good HEI and a fresh tune up and youll be fine
ive also heard that the 5.7L vortec marine engine cam(cheap way to get a a RamJet cam) will get good gas mileage in a 305... again id use those springs ... if your going to use a 350 then all of this is nil
btw camel humps are 64cc, are now 40+year old technology and get outflowed but almost anything but the swirlports on your 305 LOL unless they are ported ofcourse but why start with inferior heads if your going to have them machined anyway?

 

well change of plans. I was takin out the freeze plugs the other night and well one decided it didnt want to give but the motor did. Took out a nice little chuck of the motor block ruined now. So we got the 305 block #14010201 and heads #14022601. My brother n law wants to go with a stock or near stock cam but i cant find the lift and duration on a stock cam any one know wat it is for a 305.

 

LOL @ stock cam its like 380/400 lift or some ridiculousness, just find a used L98 cam on these boards itll be a small increase you wont notice and SHOULD be ok with the stock springs... i still go with my recomendation of an LT1(447/459" lift) cam which will cost as much as the anemic L98 cam(400/415" lift)

 

arnt those roller cams i didnt think they would work in a older block

 

87+ =1pc rear main seal and roller cam in an Fbody(non roller in a truck) so yes your 92 305 will take a roller cam and has one installed now

 

the block numbers say its an 80-84 block.I found a cam at summit but i dont know how to get the web adress on hear its a summit racing SUM00052 they said its the biggest cam for stock converter and almost maxed out on lift for stock heads

 

so u have an 84 block that came in a 92 camaro?? is there something im not seeing here??

 

how about this http://www.summitracing.com/parts/SUM-1103/ you can use those springs i linked you to, and get new lifters, and a new timing set

 

a torque converter from an auto S10 4.3L will get you a little higher stall for real cheap and since you wont make an obscene amount of power it should be a nice little increase... get a tranny cooler if your worried about it, i personally wouldnt bother unless your launching it constantly

 

this one http://www.summitracing.com/parts/SUM-1102/ should be able to use stock springs and def a stock converter, and if your compression is low becuase we have no idea what it is this one will work fine... or just leave the stock cam in there because the small increase is probably not worth the trouble