Howdy all.. Its been a long winter, Just thought I'd bring you up to speed on the Beaumont..

Here is the old set up..

http://66283.150m.com/Gene/leftfront.jpg

And the new...

http://66283.150m.com/Gene/daviscar-apr%20001.jpg

http://66283.150m.com/Gene/daviscar-apr%20002.jpg

These are pics of the first major test fit.

All in all I removed 4feet from the Exhaust cross-over.. and a foot from the intake tract. I now have a removable cross-over, and cold air intake.

I ditched the Poweerstroke intercooler and went with a Procharger unit. And upgraded to a return style reg (Not in pic)

I also am trying out a Coan 5000rpm converter.. (Should get rid of the lag off the line).. The converter was to good of a deal to pass up!!

Let me know what you think!! (Thanks to Ryan H. for the webspace)

Gene

Looks great! Lots of people on the power-adder theme lately, they make killer power. Not the roots type anymore, but turbos and centrifs are just taking care of business now.
My legt 12 second as-is street car seems pathetic lined up next to 90% of turbo cars, but I need to keep thigngs in my context.

What sort of stuff are you expecting to do with the turbo? Race? Street? Your front tires look a little skinny so I am guessing race?
How far into the project are you, and what type of turbo is it?

Matt

this is the second go-round with the turbo.. The entire kit is homemade.. The car is dual purpose, I live in a smaller city (the law lets things like skinny tires, and louder exhaust fly)

Turbo is a PT-88, 355cui, I mainly want to have fun with the car, cruise it around with out overheating, etc, etc...

I would like to go 130 this year(With street rubber), It is within reach once I get the bugs worked out.. My biggest issue so far has been with the regulator.. RUNNING FAT! It was so fat I could only get 3 passes on my oil.. I'de put 8quarts in and take 9quarts out!! The old reg was adding too much preassure to quickly.. My new once should lean things out abit ;)

Wow. That is sweet! How much boost can you run with a blow through setup like that?

That is a big ole turbo to spool with only 355 cubes... but I suppose some of the supra guys run them (although I have yet to see one who doesn't need nitrous to spool it). Keep us updated on how the PT88 spools with the 355.

Gene, that is definitely a one of a kind setup. What is the race weight of the car with driver? What e.t./mph has it done so far?

Something to think about with a blow through carb setup - you may well find a LOT of power by ditching the intercooler altogether. Yes, you read that right. On my cent sc 468 tuning without the intercooler was one of the better choices. The carb itself acts as a mini intercooler as it atomizes the fuel and sucks heat out of the pressurized inlet air. Here's the deal: a larger intercooler adds considerable volume between the super/turbo and the carb, and to keep it all at a sufficiently high carburator inlet psi requires considerably higher turbo outlet boost. When you eliminate all that volume to be pressurized you can run a lower turbo outlet boost psi to achieve the same carb inlet boost psi - think about it. Also, all the twists and turns in your plumbing to and from the intercooler further ratchet up the turbo outlet boost needed to achieve a certain carb inlet psi. You really should have air temperature probes at the turbo outlet, carb inlet, and in the manifold under the carb. At 17.1 psi boost my non-intercooled 468 was only ~ 144 degrees in the intake manifold (safely away from the danger zone; generally 200+ degrees).

As for your engine running fat it may not be a regulator issue. How much static fuel pressure? How much fuel pressure at full boost? What is full boost psi? Perhaps it is a carb setup issue, we can generally rule out booster issues and instead look toward the high speed air bleeds.

I say you should trade away or sell that 5,000 stall converter. Turbos can be setup to provide tremendous low rpm torque, negating the need for high rpms to generate power - but maybe you have it setup differently?

Thomas

What is the race weight of the car with driver? What e.t./mph has it done so far?with my fat but in it it weighs 3598..with a 1/3 of a cell of fuel.. cant look at et ( always changing stuff) best MPH so far is 121 (Pump gas)

As for your engine running fat it may not be a regulator issue. How much static fuel pressure? I run 6-7psi static fuel preassure..when I originally bought the regulator I mistakenly put a regular flare fitting in the inlet.. it buggered up the ball bearing that regulated preassure via boost.. sometimes during idle I was seeing 20+ psi of preassure.. during a run the fuel would sometimes come at a 2:1 ratio!! It was impossible to regulate.

For the little bit.. I replaced the reg.

So far I have tryed non-intercooled (pump gas).. Non-intercooled race gas.. Powerstroke intercooler pump gas... and now this

I have only made 10 or so passes with the turbo setup.. so far max acheived boost (on gauge) is 14psi

I say you should trade away or sell that 5,000 stall converterI was originally using a 10" 3500 stall.. The motor did not make boost until 4000.. needless to say it didnt launch to well, I installed a trans brake to help the issue.. My 3500 went to 5800 went boost finally came on (very slowly)

After I destroyed that converter I tryed Ryan H's 9" BTE.. Wasnt happy with it either.. I came accross this 8".. brand new for a very good price.. My figuring is the converter will be loose enough to allow the motor to get to 4000, then tighten up at it reaches stall, allowing for quicker launches.. and better 60ft's I realize I will be sacrificing efficiency on the big end.. But I just couldnt live with the FOREVER spool up times.

but maybe you have it setup differently? I originally built this motor to run with an 8-71.. After outgrowing the huffer, I went turbo.. My power range has generally been 3500-7000.. however with the turbo not coming on hard until 4000.. it has shrunk by 500rpm..

I am still running the blower cam (solid roller) once I make a pass this season I will put in my Cam-motion grind.. I really wnat to see how much difference a "turbo cam" makes/

BTW I really apprecialte the info you have given me.. It was you that told me to stay away from the powerstroke I/C.. I had to try it.. AND IT SUCKED!! I picked up the procharger I/C for a good price as well, it is rated efficiently up to the power I want to make.. I'll give it a try, If it doesnt work, there are a bunch of guys that will buy it from me.

HTH

Gene

I am not a turbo guy so bear with me - but isn't 14 psi with a T88 on a 355 a bit on the low side even given your current camshaft? I am only asking because I want to know what you think.

Have you computed your transmission rpm efficiency yet? This would be where you compare your observed rpms through the lights at a given mph against the theoretical locked up rpms. There could be some mph hiding inside an inefficient transmission. Not all higher stall converters are automatically inefficient - be sure to check your trans high pressure, it could be falling off and you wouldn't immediately know.

Have you read the Corky Bell book "Maximum Boost", there should be a lot of usefullinformation in that book.

Also, your carb inlet hat - I just gotta say that one looks like a turbulance creator. I would seriously suggest a West Coast Fab carb hat - my engine picked up 42 hp almost on that alone.

Thomas

That was one of the ways I found out my first converter was pooched.. I havnt ryed the new converter yet..

Boost hasnt been turned up because I am still ironing out the bugs. Once I can get everything working the way I want it I will turn it up! graemlins/beers.gif

The turbonetics hat was a little restrictive.. On of the changes I made was to midify it.. Open it up to a 3" inlet, and add a 2" spacer to the bottom for added volume..

Check the pic.. Prob not the best hat, but it was free, so I'll try it! smile.gif

http://66283.150m.com/Gene/daviscar-apr%20003.jpg

awesome!
:cool:

Now that I've seen a closeup shot of the "U-Fab" carb hat I am POSITIVE that it is wasting power potential. Raising it up was a good idea, but that design will do a poor job of turning the air into the carburator without a hell of a lot of turbulence - that shape violates a few rules of airflow. Just imagine what would happen if your intake ports were shaped like that. Air is lazy, but it responds well to directions - just never give it pockets or recesses where it can create back eddy flow because you WILL confuse the flow.

Thomas

Bob, I own a 68 Beaumont SD that was sold new in Lethbridge at Enerson Motors LTD. Are they still in business? I am trying to find a tag frame or decals from them. Do you have a picture of your car that you could post? Check the link below for pictures of mine.
James

I work for the old Enerson Motors.. They are now Davis Pontiac Buick GMC LTD.. Give me a call and I'll see what I can dig up for ya. 1-403-329-4444

Not sure if there are any decals left.. They changed over 13 years ago.. However there are TONS of old cars around.. I'll bet I can yard one from the wreckers for ya.. Let me know

Bomber.. Your right about the hat.. I did radius the new inlet, so it is less restrictive, and more directional than the old style.. Sooner or later I am going to buy a hat with proven results. I'm just one of those guys who has to try things out, and learn the hard way ;)