Some race shop pics

[AlNyhus]

I know some of you enjoy seeing my 'day job' stuff...here's some stuff going on now.

This one came out. It's pretty tight with the carb linkage under the lip of the wind shield...you have to jiggle the engine forward just a skosh. When it's out, there's plenty of room.

This one has been in and out during fab work. The mid plate is finally done and it and the trans is in place. Next comes the radiator and all the cooling lines for the inter cooler and the inter cooler ice tank. It's going to be tight. And of course....the new tranmission is leaking fluid from a weld in the oil pan.

 

[butchlambert]

Looking very good Al!

 

[rebs]

beautiful, I love it

 

[jackieschmidt]

Slot those mounting holes in that top plenum plate and move those carbs a little forward.

Great Work! think when I get home tonight, I’m going out to my shop, raise the hood on the Malibu and gaze at the big Rat for a few minutes.

 

[durand mortenson]

I use to run a T-16 theodolite as a survey chief so skosh and hair are familiar terms. Also something you would hear in the machine shop.
Nice work , nice photos.
My son will bring my slide collection of sixties drag racing up this summer so I can post them.

Mort

 

[cp generation]

I use to run a T-16 theodolite as a survey chief so skosh and hair are familiar terms. Also something you would hear in the machine shop.
Nice work , nice photos.
My son will bring my slide collection of sixties drag racing up this summer so I can post them.

Mort

Theo upside down and backwards ??? if i remember correctly...

 

[AlNyhus]

Slot those mounting holes in that top plenum plate and move those carbs a little forward.

Jackie, that's the 4th plenum top we've worked with on that intake. On the dyno, that carb positioning is worth 14 horse power. Better still, it addressed the tendency for fuel droplets to fall out of atomization and 'stack' at the back of the plenum in low gear. The fuel/air sensors didn't show this but the G meter on the RacePak clearly showed a leveling off mid way through low gear.

It's 400 cubic inches and makes 2.7 hp/cubic inch on NHRA spec'd. gas (VP C25).

 

[durand mortenson]

Theo upside down and backwards ??? if i remember correctly...

I ran one of those early on a small job....what a pain. Later on I used a scope that eliminated that. I don't remember which is which ...to long ago.

Mort

 

[ShtrRdy]

Things like this are mind boggling to me. How do you figure out that fuel droplets are falling out of atomization? And how do you figure out where the major pieces are placed ( transmission, engine )
[You don't have to answer these.]

 

[troupe]

More amazing things from Mr. Al. I am a rookie here and great to know that he enjoys different forms of speed, from bullets to race cars. Amazing !

 

[gunsandgunsmithing]

I use to work in the race engine field a bit. It's been a while but next time we talk, remind me. We likely have some common friends from the racing sport as well. You're way beyond me...probably always but things have passed me by in the last several years. I enjoy your posts and once a gearhead, always a gearhead.

 

[JFrank]

This appears to be carbon fiber frame tubes, if I’m correct, is this difficult to work with ?

 

[gunsandgunsmithing]

View attachment 1516561
This appears to be carbon fiber frame tubes, if I’m correct, is this difficult to work with ?

Not sure these days. It may have a function but NHRA has pretty stringent rules and has to be able to inspect WELDS. etc. It might reinforce frame components but I doubt it's the main frame material.

My guess, he's stiffening the frame in critical areas without adding a lot of weight, yet still satisfying NHRA rules.

 

[AlNyhus]

NHRA is very stringent on safety. On a tube chassis car like this Mustang, the tube size and thickness is specified in the rule book and a fairly sophisticated sonic checker is used to check tubing thickness. Where chrome moly tubing is used, the welds must all be TIG'd.

The carbon fiber on the tubes is used to protect the frame rails, door bars and other 'high traffic' areas that are prone to losing paint. It's also a bit of an insulator. The ignition systems on the supercharged stuff can generate over 80 amps.

 

[6.5 forever]

Very interesting. Your knowledge is outstanding.

 

[AlNyhus]

Very interesting. Your knowledge is outstanding.

I don't know if I'd go that far.

 

[jackieschmidt]

Al, what CFM Dominators are those?

 

[gunsandgunsmithing]

Al, what CFM Dominators are those?

My guess is, knowing Al, they're flowing more than they were rated anyway. Lol!

 

[butchlambert]

Al, I sent you a couple emails! Help!

 

[AlNyhus]

Al, what CFM Dominators are those?

Jackie, those are Bob Book carbs. They wet flow probably around 1400 cfm and each throttle blade is 2.250". Consequently, the base plate hole spacing is quite a bit wider than the 4500 series Holley Dominator carbs. Other than the fuel bowl screws and a few pieces of hardware, there's nothing 'Holley' about these. They also have replaceable low and high speed air bleeds that really help with the BSFC (brake specific fuel curve) numbers that allow you to keep the fuel/air ratio where you want it rather than constantly fighting the natural tendency of carbs to self-richen as the air speed through them increases.