changing crossfire C4 to carburation

Hey, all you can do is point out the pitfalls and disadvantages to the
fellow. I agree that a cracked manifold doesn't warrant what he wants to do,
but he seems to have his mind set on it. In effect what he'll be doing by
completing this "retro-fit" is reducing any market or intrinsic value of the
car to nothing,.... plus he's going to spend a couple thousand in parts &
labor to arrive at this end result.

Not to criticize, just my opinion.

The Cross-Fire TBI system on the 84 was two GM 200 series TBI's. The same
TBI's that would appear in GM's medium cars and light trucks 3 years later.
Synchronization of the TBI's was done via the ECU. It was a good system,
fuel efficient, and got rid of that massive amount of vacuum lines that
draped the intake manifold, but lacked the kind of performance you want in a
Corvette.

I spoke with a welder the other day and he said that unless the manifold is
broken in half it is not a problem repair it.(In the neighborhood of $100).
A couple years ago he repaired a smashed runner on a SBC manifold for me.
Looked like a factory new manifold when he was done. If you have a skilled
welder with the right tooling he can work wonders.

On Dec 6, 8:02 pm, Elbert > wrote:
> what was in the camaro from 1982? the 7004R trans?
>

They used the 200-4R for a while, then switched to 700R4. Don't
remember when.

I don't remember if it was manual or automatic:

Call them at 570-644-0777, ask for Paul.

RK
"Elbert" > wrote in message
...
>
> what was in the camaro from 1982? the 7004R trans?
>
>
> On Thu, 06 Dec 2007 19:13:09 GMT, "Refinish King"
> > wrote:
>
>>It was in the Camaro from 1982!
>>
>>You and the other guy, should be careful of cigarettes with white dust on
>>them.
>>
>>RK
>>"Elbert" > wrote in message
. ..
>>>
>>>
>>> I would be all over a conversion if it were my car. where you going to
>>> find the parts for a 1984 crossfire (something that was very limited
>>> production).
>>>
>>> Other poster said this car has a electronically controlled 700R4...is
>>> this true on a 1984 model car? Since I'm not a corvette nut I don't
>>> know but that does not sound right. You have the lockup converter
>>> controlled by wire but I don't think this thing shifted by wire
>>> (correct me if someone knows for sure)
>>>
>>> Unless you have a pristine car and want to retain the stock engine....
>>> I would basically trash the fuel and intake setup. Install an old
>>> school HEI distributor (like came on a 78 z-28) you can buy a good
>>> rebuilt unit from NAPA. Find out what low profile dual plane intake
>>> and carb setup + air filter will clear the hood. Do away with computer
>>> controls....etc... Now this based on living where emissions controls
>>> are lax or non-existent.
>>>
>>> If you live where you have strict emissions controls... I would look
>>> for a good tuned port motor out of a later model z-28 to swap over.
>>>
>>> There are a number of companies that make all kind of stand alone
>>> wiring harnesses for projects just like this. Of course you would
>>> have to know how to work on the car and have good basic mechanical
>>> knowledge of the vehicle and any donor vehicle.
>>>
>>> All around road manner and good power....I would be looking for a
>>> tuned port setup to use (GM OEM Stuff) not aftermarket. I would look
>>> to buy a complete engine assembly out of a wreck.
>>>
>>> Maybe something out of a 02 Z-28 or even a LT-1 engine out of caprice
>>> or road master would be good.
>>>
>>> crossfire to me would be a pain in the ass to screw with, given the
>>> opportunity to get a new motor with a lot better fuel injection setup.
>>>
>>> Was a crossfire not something like to mini-throttle body type injector
>>> setups. I would go with a more modern fuel injection setup any day
>>> over crossfire. You can buy entire engine assemblies + ecm + wirining
>>> harness for $1,500 or so.
>>>
>>> Seems to me that even the corvette used a transmission in the 1984
>>> year that worked of either kickdown cable or TV cable. Unless the
>>> 84 has the odball trans mount setup I would change that too, and go
>>> with a more modern version of the 700R4 with TV cable. Does the 84
>>> have the oddball trans mount setup?
>>>
>>> If under strict emission controls, you better check the rules on
>>> engine swaps in your area to make sure what you can do in order to
>>> pass emissions / inspection, othewise you may be up the creek.
>>>
>>> If you get a complete engine assembly then get the wiring harness
>>> and the ECM. Othewise you'll need to obtain an ECM and can use
>>> a wiring harness from painless.
>>>
>>> Swapping all this would not be an easy job. Don't know if that car had
>>> an "electronic" dash... and if so does the ECM have any direct
>>> control over the gauages or inputs into the dash. This would be a big
>>> job to tackle, I would certainly do some research, espically if you
>>> will have to pay someone or even do it yourself.
>>>
>>>
>>>
>>>
>>>
>>> On Wed, 05 Dec 2007 02:35:33 GMT, "Art" > wrote:
>>>
>>>>wow, seems everyone is against it but i have seen several here in the
>>>>southeast that appear to be running fine with a carburator. I may have
>>>>to
>>>>strip out the dash and replace with standard gauges, but the trans
>>>>should
>>>>perform ok, i guess what i am doing is dropping back 4 years in
>>>>technology
>>>>but necessary to keep it running. I have seen many cars built with a
>>>>350
>>>>and running without a lot of electronic additions, the '84 was a very
>>>>primitive computer and most everything can be bypassed i think. I don't
>>>>think I have any alternative ways at this point.
>>>>
>>>>
>>>>"Billy Ryman" > wrote in message
...
>>>>> Your biggest problem is going to be the ECU, not the HEI distributor.
>>>>>
>>>>> Your removing a lot of stuff that the ECU needs to inputs from, mainly
>>>>items
>>>>> that do not exist with a carb. The ECU is set up for TBI not a carb.
>>>>Biggest
>>>>> show-stoppers items are TPS, IAC, and MAP
>>>>>
>>>>> Code after code after code will be set if you can even get it to run
>>>>without
>>>>> the above.
>>>>>
>>>>>
>>>>
>>> -----------
>>> Elbert
>>>
>>>
> -----------
> Elbert
>
>

Pitfalls as follows:

Modifying the transmission detent cable, and making a bracket.

Changing over to a HEI distributor, providing he has the clearance.

Wiring issuse, Codes setting for missing components.

Emissions, my daughters and grandchildren breath the air hr will mess up.

Cam issues, i.e..: Stumbling, hesitation and all that good ****.

Gearing, the rear is most like lower than a carbureted car.

I'm too disgusted to go on and tired.

RK
"Billy Ryman" > wrote in message
...
> Hey, all you can do is point out the pitfalls and disadvantages to the
> fellow. I agree that a cracked manifold doesn't warrant what he wants to
> do, but he seems to have his mind set on it. In effect what he'll be doing
> by completing this "retro-fit" is reducing any market or intrinsic value
> of the car to nothing,.... plus he's going to spend a couple thousand in
> parts & labor to arrive at this end result.
>
> Not to criticize, just my opinion.
>

The crossfire system in the Z-28's only lasted 2 years, In 1984 the LU5
option was dropped and it was back to LG4 and L69 which in 1984 sported
closed loop carbs!!!!! That system was not the same as the Corvette 1984
version by a far cry (they were the same POS that was installed on the 4
cylinders). It was so poorly designed that the most HP they could get out of
the that 305 was a rated 160!

The TBI's used on the 1984 Corvette would not be used in regular GM
production until late 1986!

Remind us not to send you to the parts store.