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-   C4 Tech/Performance (https://www.corvetteforum.com/forums/c4-tech-performance-48/)
-   -   Cross fire to carb (https://www.corvetteforum.com/forums/c4-tech-performance/4001541-cross-fire-to-carb.html)

Jdog91 06-14-2017 02:41 PM

Cross fire to carb
 
i recently got rid of my crossfire injection put a edelbrock torker 2 intake with a 650 cfm holley double pumper. Got a vacuum advance dizzy. All I need now is a fuel regulator

Tom400CFI 06-14-2017 02:44 PM

Cool. Should make about the same power as if you had ported the stock intake. :thumbs:

Jdog91 06-14-2017 02:47 PM

Fuel injectors both clogged was not worth replacing both at 110 each.

Hot Rod Roy 06-14-2017 02:57 PM


Originally Posted by Jdog91 (Post 1594945244)
Fuel injectors both clogged was not worth replacing both at 110 each.

Tempted to comment, but won't. Enjoy your '84!!

:cool:

Jdog91 06-14-2017 03:10 PM

Let me hear it I want as much horsepower as possible

ToniJ1960 06-14-2017 04:23 PM


Originally Posted by Jdog91 (Post 1594945244)
Fuel injectors both clogged was not worth replacing both at 110 each.

What are you going to do with your cf parts?

Tom400CFI 06-14-2017 04:30 PM


Originally Posted by Jdog91 (Post 1594945244)
Fuel injectors both clogged was not worth replacing both at 110 each.

So you got the carb, intake and distributor for less than $220?

110 each for TBI injectors is too much.

REMAN TBI IJNECTOR: $30 BUX





Originally Posted by Jdog91 (Post 1594945244)
Let me hear it I want as much horsepower as possible

You probably aren't going to have as much horsepower as possible with a Torker intake on stock cam/heads/exhaust. But it should be more than stock. A little anyway. Taker 'er to the track...see what it'll run! :thumbs::yesnod:



.

Jdog91 06-14-2017 08:37 PM

Definitely plan on going to track got the whole new setupfor 70 bucks from The app OfferUp. https://cimg6.ibsrv.net/gimg/www.cor...16750569a3.jpg

Jdog91 06-14-2017 08:38 PM

If anybody wants crosssfire parts I will sell them cheap I am in central New Jersey

Tom400CFI 06-14-2017 09:07 PM


Originally Posted by Jdog91 (Post 1594947626)
Definitely plan on going to track got the whole new setupfor 70 bucks from The app OfferUp.

That's pretty cheap! But injectors would have been cheaper. I just got some junkyard ones for my car for $6 each. That would have been $12 for your car. :yesnod:

That carb isn't a "double pumper", BTW. :thumbs:


.

Jdog91 06-14-2017 10:53 PM

https://cimg1.ibsrv.net/gimg/www.cor...5c1fe70fb3.pngNext mod will be the supercharger and hood cowl

Taylor Allen 06-14-2017 11:09 PM


Originally Posted by Jdog91 (Post 1594948532)
https://cimg1.ibsrv.net/gimg/www.cor...5c1fe70fb3.pngNext mod will be the supercharger and hood cowl

couldnt have possibly picked a worse air filter

divotdug 06-15-2017 07:07 AM

Carb looks a little tired. I would rebuild it before I relied on it.

Jdog91 06-15-2017 08:50 AM

What can use to make the carb shine again.

billschroeder5842 06-15-2017 09:28 AM


Originally Posted by Taylor Allen (Post 1594948633)
couldnt have possibly picked a worse air filter

Taylor, you are being vary generous when you call that a "filter"

Jdog, please dont use that "filter" as is; you have zero filtering properties.

billschroeder5842 06-15-2017 09:30 AM


Originally Posted by Jdog91 (Post 1594950050)
What can use to make the carb shine again.

I'm suggesting a full on rebuild. Clean internals are way more important than a shiny outside. If you rebuild the carb, you will get a clean inside AND outside.

Jdog91 06-15-2017 09:50 AM

I'll see how it runs without the rebuild. But plan on rebuilding carb anyways. As for the air filter what do you suggest in terms of a better one seems I will have to cut a hole in the hood either way

Taylor Allen 06-15-2017 10:57 AM


Originally Posted by Jdog91 (Post 1594950498)
I'll see how it runs without the rebuild. But plan on rebuilding carb anyways. As for the air filter what do you suggest in terms of a better one seems I will have to cut a hole in the hood either way

anything like a standard drop base air cleaner? available at nearly any autozone, etc

http://www.jegs.com/p/JEGS-Performan...51908/10002/-1

https://cimg4.ibsrv.net/gimg/www.cor...d03ae3f805.jpg

billschroeder5842 06-15-2017 01:23 PM


Originally Posted by Jdog91 (Post 1594950498)
I will have to cut a hole in the hood either way

AAAAHHH? Why?

Unless your goal is to modify the hood, there is no reason to cut a hole in the hood.

The 80 and 81s used a carb set up as you have, so the clearance is allready accounted for. The air cleaner in your photo is not (not) even remotely compatible.

Get something like Taylor suggests and put the Saws-all back in the box.

ex-x-fire 06-15-2017 07:29 PM

1 Attachment(s)
If you want to keep it EFI, you could do this. Your stock wiring & ecm will hook up & run it. The junkyards are full of tbi units, crossfire is basically the thing as a 2 barrel tbi.

Jdog91 06-16-2017 08:41 AM

https://cimg0.ibsrv.net/gimg/www.cor...6796450f3c.jpgA little rusty but still working
https://cimg1.ibsrv.net/gimg/www.cor...0ca8f91a96.jpgGreen wires are from vacuum advance distributor
https://cimg3.ibsrv.net/gimg/www.cor...ac6ef1d065.jpg
New used distributor how do I wire up to delete the ecu and just use the vacuum.

Jdog91 06-16-2017 08:42 AM


Originally Posted by ex-x-fire (Post 1594955174)
If you want to keep it EFI, you could do this. Your stock wiring & ecm will hook up & run it. The junkyards are full of tbi units, crossfire is basically the thing as a 2 barrel tbi.

Nice very impressive wish I knew about this before

Tom400CFI 06-16-2017 10:15 AM

This project could have definitely used a little more prior planning.

Originally Posted by Jdog91 (Post 1594957666)
New used distributor how do I wire up to delete the ecu and just use the vacuum.

Nothing special needed; keyed power to the pink wire on the distributor, vacuum line run to ported vacuum port on the carb. That should get it running.




Originally Posted by Jdog91 (Post 1594957675)
Nice very impressive wish I knew about this before

Why? For way less money you could have replaced your CFI injectors and had the same performance.

pologreen1 06-16-2017 10:00 PM

So first off.. the cfi can work if it works at all. The intake you mention can be seen here and they manufacturer also gives a cam recommendation etc.

http://www.edelbrock.com/automotive/...orker-sb.shtml

I'm not a cfi guy and don't care to be. I can tell you it was built with a purpose. that purpose was not to give you a muscle car.

You now have an intake that will flow decent if you get a cam to match it and either work the heads or change them and add headers. If it goes 6k+ like it claims and a cam and heads to support it you'll be waiting for a cfi car to catch up to you, so you can drag them again.

You can port all you want and play with the cfi, a few guys made it their goal to make it "perform" now you have what is called bolt on parts, the more you bolt on the more power you'll be able to make.

I don't know the flow rate comparisons between the 2 intakes and in the last 30+ years surely somebody did one and wrote it down somewhere, but Edelbrock did the research, all you have to do is buy the parts. Don't feel bad you changed the car.

Feel bad you put that stuff on in that condition and considered doing that air cleaner set up.

Tom400CFI 06-16-2017 11:54 PM


Originally Posted by pologreen1 (Post 1594963026)

I'm not a cfi guy and don't care to be. I can tell you it was built with a purpose. that purpose was not to give you a muscle car.

You now have an intake that will flow decent if you get a cam to match it and either work the heads or change them and add headers. If it goes 6k+ like it claims and a cam and heads to support it you'll be waiting for a cfi car to catch up to you, so you can drag them again.

I don't know the flow rate comparisons between the 2 intakes and in the last 30+ years surely somebody did one and wrote it down somewhere, but Edelbrock did the research, all you have to do is buy the parts. Don't feel bad you changed the car.

Well that was a lot of rhetoric. "Edelbrock did the research..." Well there you have it folks....PROOF! (of who knows what). Edelbrock may have done some research (probably mostly packaging modeling) but the research that they did likely wasn't a Torker II on a 200 hp long block.
What he has, is a single plane intake on a smogger long block. What that equals is a terrible combo; the intake ensures no low end torque...the cam heads and exhaust ensure no top end hp. Maybe it will make "OK power" from like 3500-4502 rpm? Maybe. He'd have had a faster, better running car if he'd kept the CFI intake. :thumbs:

But you're right Polo; "all he needs" now, since he already invested in that big dollar intake and carb, is a cheap set of heads, a good cam, headers and full exhaust and he'll have a screamer. Yep...he's well on his way. :crazy:

Jdog91 06-17-2017 04:24 PM

Update : got distributor setup too dead center go to start the car and exactly the same is happening . No combustion in even cylinders. About to bring to shop does not make any sense at all why if it has spark and fuel and compression and air why it will only run on half the cylinders.

confab 06-17-2017 04:41 PM


Originally Posted by Jdog91 (Post 1594966687)
Update : got distributor setup too dead center go to start the car and exactly the same is happening . No combustion in even cylinders. About to bring to shop does not make any sense at all why if it has spark and fuel and compression and air why it will only run on half the cylinders.

You out 180 degrees? They'll sputter and pop if you do that.

pologreen1 06-17-2017 05:08 PM


Originally Posted by Tom400CFI (Post 1594963517)
Well that was a lot of rhetoric. "Edelbrock did the research..." Well there you have it folks....PROOF! (of who knows what). Edelbrock may have done some research (probably mostly packaging modeling) but the research that they did likely wasn't a Torker II on a 200 hp long block.
What he has, is a single plane intake on a smogger long block. What that equals is a terrible combo; the intake ensures no low end torque...the cam heads and exhaust ensure no top end hp. Maybe it will make "OK power" from like 3500-4502 rpm? Maybe. He'd have had a faster, better running car if he'd kept the CFI intake. :thumbs:

But you're right Polo; "all he needs" now, since he already invested in that big dollar intake and carb, is a cheap set of heads, a good cam, headers and full exhaust and he'll have a screamer. Yep...he's well on his way. :crazy:

You are right.

OP what is your purpose here? Do you just want it to drive or be able to make power at some point?

I think what tom400cfi is trying to say is you should look for more of a lower rpm intake to stick on it, since the peak torque on the stock POS is like 290TQ @ 2800 and 205HP @4300 rpm. You could try to match that, many others used the performer series. Unless you for some reason don't have the stock parts on the motor anymore, then you might be able to run it up higher. Do you know your rear gears? I think some 84's can have a little lower gear than most of the TPI models.

If you want to build it, do all the other stuff and the intake is fine. Let us know how it goes, I doubt it but you might like it.

Jdog91 06-17-2017 05:25 PM

No I am not off 180 degrees and no popping either is the hei distributor computer controlled. I get spark when starter is moving engine but as soon as it gets to 500 rpm no spark from even cylinders.

confab 06-17-2017 05:31 PM


Originally Posted by Jdog91 (Post 1594967034)
No I am not off 180 degrees and no popping either is the hei distributor computer controlled. I get spark when starter is moving engine but as soon as it gets to 500 rpm no spark from even cylinders.

I haven't seen one in years, But I remember the distributor you want isn't computer controlled. It gets 12V to the + pin in the cap, and that's it!

All there is to it. You run the vacuum line to ported spark and you're done. The one in your pic is the right one.

Could it be bad? Module or something?

Jdog91 06-17-2017 05:32 PM

This engine only has 70000 miles on it I plan on get it running right then eventually rebuild the engine at 100000 miles

Jdog91 06-17-2017 05:33 PM

But this god dang half engine not firing crap is really pissing me off

ex-x-fire 06-17-2017 07:48 PM

Tight rocker arms? Check compression.

Gibbles 06-17-2017 08:28 PM

This thread just makes me sad/cringe...

Brandonbeast bought an 84 where the previous owner did a total hack job of a carb conversion...

Good luck!

​​​​​​​I personally laid down some money and modified my existing CFI to be more fun... :)

confab 06-17-2017 10:06 PM


Originally Posted by Gibbles (Post 1594967993)
This thread just makes me sad/cringe...

Brandonbeast bought an 84 where the previous owner did a total hack job of a carb conversion...

Good luck!

​​​​​​​I personally laid down some money and modified my existing CFI to be more fun... :)

That's a good point.. Can someone list an actual reason why a carb and dumb distributor would produce more power with a mild street motor than a computer controlled FI system?

Given the parameters here.. I can't think of one?

Tom400CFI 06-19-2017 10:59 AM


Originally Posted by Jdog91 (Post 1594967034)
I get spark when starter is moving engine but as soon as it gets to 500 rpm no spark from even cylinders.

HOW have you confirmed this?

Because earlier, you said:

Originally Posted by Jdog91 (Post 1594967034)
if it has spark and fuel and compression and air why it will only run on half the cylinders

So...what is really happening, here?


.

billschroeder5842 06-19-2017 04:45 PM


Originally Posted by Tom400CFI (Post 1594975939)
So...what is really happening, here?

I had an 82 with the exact engine so I have a crazy idea here (but isn't this what we are all about?)

If my old TBI memory comes back to me, there is a main and a secondary that feeds each side (odd and even) side of the engine. There are IACs that work independently for each of the TBI. The TPS is only on the main as is the MAP sensor with the EGR pulling from the secondary.

So... because engine is "morphed" could the computer still think that twin TBI are in place and when the rpms get above the idle, the computer looks for normal (escalating) TPS and IAC input values and effectively "shuts down" the secondary (the even number cylinders) as there is no signal and the computer becomes confused?

Sure its crazy (and I'm at work, so I can't blame it on alcohol) but I'm not coming up with anything else?

BTW... my '82 XFire was a rock solid performer. I'd get another in a heartbeat.

Tom400CFI 06-19-2017 05:09 PM

^Hard to know for sure in this thread, but I think that the ECM is totally out of the picture now. He has a carb, and a mechanical distributor. Computer couldn't shut down anything if it wanted to, at this point. It may not even have the ECM in the car.

Jdog91 06-19-2017 05:23 PM

Used vacuum advance distributor didn't work so I have the stock one controlled by the computer on there. How would I wire up the stock distributor to not use the computer ?

confab 06-19-2017 05:30 PM


Originally Posted by Jdog91 (Post 1594978661)
Used vacuum advance distributor didn't work so I have the stock one controlled by the computer on there. How would I wire up the stock distributor to not use the computer ?

I'm not sure you can. I think you'll need a good vac distributor, or go back with the FI and the computerized distributor.

383vett 06-19-2017 05:39 PM


Originally Posted by Jdog91 (Post 1594978661)
Used vacuum advance distributor didn't work so I have the stock one controlled by the computer on there. How would I wire up the stock distributor to not use the computer ?

You can't. Just get another vacuum advance distributor.

Jdog91 06-26-2017 11:27 AM

New distributor same problem completely stumped only runs on drivers side cylinders.?!?!?!

383vett 06-26-2017 11:57 AM


Originally Posted by Jdog91 (Post 1595021989)
New distributor same problem completely stumped only runs on drivers side cylinders.?!?!?!

How do you know this? Checking temperature of header primaries or pulling plugs? An HEI non computer distributor doesn't know left from right bank.

Jdog91 06-26-2017 12:00 PM

No heat from passenger headers and no exhaust from passenger exhaust.

Jdog91 06-26-2017 12:06 PM

https://cimg5.ibsrv.net/gimg/www.cor...87d98202ed.jpgValves a lil loose
https://cimg6.ibsrv.net/gimg/www.cor...7ede4a2cf4.jpgValve hitting pushing up on metal
https://cimg7.ibsrv.net/gimg/www.cor...bc0352914d.jpgAll these tabs are being hit by the rockers
https://cimg9.ibsrv.net/gimg/www.cor...a1b3589b42.jpg

Jdog91 06-26-2017 12:36 PM

Low and behold these garbage valve covers caused the valves not to open properly now time to put everything together😁

Jdog91 06-26-2017 03:47 PM

I put them on upside down my bad . I know this engine inside and out simple mistake. Anybody know how to use this fuel regulator.

Hot Rod Roy 06-26-2017 03:53 PM


Originally Posted by Jdog91 (Post 1595022583)
Low and behold these garbage valve covers caused the valves not to open properly now time to put everything together😁

These valve covers weren't garbage before they were used wrong. Were these valve covers installed upside down? Who put these roller rockers on this engine without checking clearances? Have you found any bent pushrods? There's no way the valve covers would cause the valves not to open properly, unless you've got a bunch of bent pushrods! Being on only one side of the engine leads me to suspect the upside-down valve cover and bent pushrods. You CAN'T blame "garbage valve covers"!

Bent pushrods will cause loose valves. You need help from someone who knows engines. Are you having fun yet?

(I forgot to read post #4)

:ack:

Jdog91 06-26-2017 04:38 PM

Any idea how this works inlet outlet adjust ?https://cimg1.ibsrv.net/gimg/www.cor...ac461798cb.jpg


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