308 Turbo Kit for Carb cars on eBay

I'm no expert , but the Turbo would require an oil feed and oil return ? don't see any of that . Some turbo's have a water jacket for cooling ( don't know if this Rayjay does ) but you would require all the plumbing for that . Don't quite follow the inlet plenum , but if it's blow through the carbs would require modification ( seal on the the spindle shafts , etc ) I'm not knocking this kit at all , but if you are considering doing this investigate it thoroughly .

 

THis looks like the same kit that was advertised many years ago and a pic of it was posted on this site as "historical info" within the last two weeks.

It might be fine. Like previous posters said, I'd check it out pretty closely first. I know this is a "prejudice thing" on my part but I'd be more comfortable if the seller's grammar and spelling was a little better...

However, I'd be way more inclined to go with the Supercharger kit that has been detailed on this site extensively from 928 Motorsports but as pointed out, the ebay kit is for carbs and the one from 928 is for FI. Price is about the same. An SC kit is less complicated than a Turbo kit since there is no exhaust changes required.

 

I've been to Tony's house and checked out the kits. They look very complete down to the nuts, bolts, springs -even a special wench. The kit includes the RayJay turbo, Carter (I'm quite sure) carb, manifolds, exhaust pipes, muffler, tubing, etc. plus a 16 page instruction manual with pictures. Someone put a lot of time and effort into making these kits.

 

Sure wish the guy would post something describing the overall system rather than a bunch of ads selling bits and pieces.

pad -- Can you confirm that this is a system using a 4-bbl Carter carb inside a pressurized box -- i.e., the stock carbs are not used?

 

"Can you confirm that this is a system using a 4-bbl Carter carb inside a pressurized box -- i.e., the stock carbs are not used? "

The 4 bbl carb is mounted on a water cooled manifold that is on the "outside" of the turbo, i.e., air is drawned through the carb to the compressor side of the turbo.

 

Interesting -- I'm going to have to think about that one for a bit (It's not immediately clear to me why the carb would need to be "water cooled" as the hot compressed charge would be exiting the turbo, not entering it, in that configuration, but maybe the water cooling aspect isn't really associated with carb -- this is where a diagram/drawing is worth a thousand words ). Thanks for the description.

 

Here's a picture of the components.
Image Unavailable, Please Login

 

Thanks

 

Aren't most carbs that are "water cooled" really "water warmed" for better atomization and no icing?
I'm not really a carb guy despite the number of them that I have.

 

Right, warmer warned. With the carb mounted off on the side like that the fuel would want to settle out if the manifold was cold. Common problem with up draft systems.

 

Don't disagree with your thoughts here, but I think the tank portion that protrudes upward is providing some thermal shielding from the turbo -- even though it's the compressor side, it's kind of close to the fuel bowl -- just a thought...

 

I am really surprised that no one is interested in talking to me. I built every prototype part and over saw the construction
of the production parts.
scott

 

Questions:

1.) Turbo: Water cooled? Oil cooled? Is there a post engine shutdown timer on turbo to prevent oil coking on shaft bearing?

2.) Is it a blow thru or suck thru system on carb?

3.) If blow thru-how do you control fuel vaporization in carb from heat soak?

4.) What is pressure ratio of turbo?

5.) Waste gate: Is there one and is it adjustable? Or fixed blow off. How much boost?

6.) Dyno results?

Not being difficult-I have interest in package and want more info!

 

1, the turbo is a e375 e8 rajay that uses engine oil to lube the bearing.
I never had a problem or saw any reason to use any of that after engine shut off B.S.

2,It is a suck thru 450 cfm carter a.f.b.Carter sent me a calibrated carb, we ran the car on a dyno, sent the carb back
to Carter, they made changes, we retested on the dyno to make sure it had the proper A.F. ratios under all conditions.
Carter then hand built 50 carbs for us. each carb was sent with a A.F. flow sheet showing its A.F.#

3,N.A.

4,No idea

5,Due to space limits and the size of wastegates that were avilable at the time, we had to use 2 wastegates.
The kits were delivered with about 6 psi, you can get up to 12-13 psi, but you must retard the timing more.

6, we never pulled for power & if we did I forgot what it made HOWEVER,

7, The 308 feathered on my web site will be going on the pump next month. I will provide those #s when I am done testing.

 

Not a "prejudice thing" at all. Poor grammar and spelling indicates laziness and a lack of attention to detail.

 

Scott,

Thanks for the answers. Everything sounds okay-save I may worry just a tiny bit about lack of cooling on turbo bearing-but many packages are like yours so it should be okay.

Let me know about power pulls when you do them.

Also-Are you running stock 308 motor internals? What comp ratio?

 

that kit was designed to be used with the stock cams & pistons. As long as the engine does not detonate you will not have any trouble with the pistons.
Parts of that kit include new custom made dist. advance weights that reduces the mech. advance in the dist.
If you have a 75-77 euro car the cams must be rolled to provide enough manifold vacum at low speeds.
When we first discovered that problem,(on the web site car), Doug@ flodesign.com(who designed the blower manifold, carb manifold & air cleaner)came up with the new cam settings.
I also made up a kit to allow you to mount a degree wheel on the crank pulley to make that a easy job.
I doubt any of those parts are around, I only have my personal tools for that job.

 

Any idea how complete those kits actually are?

They've been kicking around for a lot of years, IMHO, if there was a custom or semi-custom part that isn't there it'd be big $$ to get it fabricated.

 

A full used set of this system popped up on Craigslist for $2000. Not sure if it is a good deal or not.
http://longisland.craigslist.org/cto/1478049801.html

 

That carb is a LONG way from the intakes. I would suspect throttle response leaves something to be desired at low RPM.

Doug

 

Hmmm. Could be used to convert a 2V injected car to something a bit different.

 

That is also priced FAR more reasonably!

 

It's not.

A turbo-timer is not BS Luckily they're very readily found at [import] turner shops

 

What does a turbo timer have to do with a 48 inch intake runner length from fuel source and potential fuel mixture delivery lag? Though this potential lag may be a non issue as it may be too short to really notice, but a quick calc from estimated volumes would suggest a 1/4 second response lag at idle.

The other issue with a carb so far away is throttle mashing response, as the entrained fuel will simply want to fall out of the air stream as vacuum is immediately dropped to zero, giving you a very lean condition that would be hard to cover up for a brief period.

Doug