Nascar Race Engine

[126coupe]

Finally got everything back from the machine shop, assembly begins

[sammyg2]

Dammm, how big are those intake valves?

I'm surprised they run H-beam rods 'cause of the windage, unless maybe it's a dry sump .......

[Tim Hancock]

I would have thought that engine would have domed rather than dished pistons for higher compression ratio. What kind of rpm will it be spinning and what kind of horsepower is this engine going to produce?

[mattdavis11]

I imagine that the lift and duration of the cam necessitates a set of pistons that are dished to the exact shape of the heads. Otherwise, it would be an interference engine.

[126coupe]

Originally Posted by sammyg2

Dammm, how big are those intake valves?

I'm surprised they run H-beam rods 'cause of the windage, unless maybe it's a dry sump .......

Intakes are 2.13 inches, dry sump, period correct from 1993, small block ford, 11:1 CR
Should make just over 700HP, will post dyne results. The rev limiter will be set at 8200

[romad]

Originally Posted by Tim Hancock

I would have thought that engine would have domed rather than dished pistons for higher compression ratio. What kind of rpm will it be spinning and what kind of horsepower is this engine going to produce?

check the combustion chamber sizes, basically just valve pockets. Domed pistons disrupts airflow and the burn. The piston reliefs are not just for valve clearance, it is effectively the combustion chamber.

[126coupe]

Now I know why I get 2-2.5 MPG

[Noah930]

Just remember, assembly is the reverse of disassembly.

Well, unless you blew up the motor on the track. Then I hope you have some sort of shop manual.

[126coupe]

Originally Posted by Noah930

Just remember, assembly is the reverse of disassembly.

Well, unless you blew up the motor on the track. Then I hope you have some sort of shop manual.

These are so simple compared to what I'm used ie Porsche Engines, my wrench is a V8 guru. This a whole new beast, Block, Crank, Pistons, Rods, Valves, Springs act

[sammyg2]

LOL, last time I built a full race v8 I put in pistons that looked like this:






Later, I bolted on a supercharger and changed the pistons to something more like this:

[911SauCy]

Originally Posted by 126coupe

Intakes are 2.13 inches, dry sump, period correct from 1993, small block ford, 11:1 CR
Should make just over 700HP, will post dyne results. The rev limiter will be set at 8200

This AWESOMENESS is being dropped in what...

[Zeke]

Well sammy, not all engines are hemi's.

I stopped by coupe's shop yesterday and saw what you see. In fact, I think I missed the picture session by minutes. The Ford block looks small and compact to me. I liked what I saw. They have installed roller bearings on the camshaft. It spins like a top with no lifters.

Love to be there when they fire that puppy.

[126coupe]

Originally Posted by 911SauCy

This AWESOMENESS is being dropped in what...

[sammyg2]

Originally Posted by Zeke

Well sammy, not all engines are hemi's.

That's a good thing. No way would mine last 500 miles.

I'd love to be able to take an older stock car and strip the weight out of it, what are they stock, 3200?

Iffn you could get it down under 2500# with all that HP it'd be downright scary. Er.
Scary-er.


Prolly wouldn't be legal tho.

[Jim Bremner]

If you need an extra hand I can be had cheap while I'm working to find work. I do know how to use a torque wrench as well as how to identify a grade 8 bolt.


Jim

[Jim Bremner]

Originally Posted by sammyg2

That's a good thing. No way would mine last 500 miles.

I'd love to be able to take an older stock car and strip the weight out of it, what are they stock, 3200?

Iffn you could get it down under 2500# with all that HP it'd be downright scary. Er.
Scary-er.


Prolly wouldn't be legal tho.

You would need a sawzall to cut out the rollcage. there's not much in dead weight on these cars.

[sammyg2]

Originally Posted by Jim Bremner

You would need a sawzall to cut out the rollcage. there's not much in dead weight on these cars.

They must be pretty darn sturdy then because they are definately not light as far as race cars go.
Guess that's why they can walk away from them 200 mph crashes.

Guess that's also why those 1300# F1 cars cost $20 mil each.

[126coupe]

[romad]

Originally Posted by Jim Bremner

You would need a sawzall to cut out the rollcage. there's not much in dead weight on these cars.

Actually have to add wieght to stock cars to make weight, you could easily get these car to 2500Lbs. That why driver size doesn't matter in NASCAR.

[Zeke]

Originally Posted by romad

Actually have to add wieght to stock cars to make weight, you could easily get these car to 2500Lbs. That why driver size doesn't matter in NASCAR.

I don't know where people find their facts. Drivers under 180 lbs. have to add weight.

And if you could provide at least a partial list of items that could be safely removed to achieve an 800# redcution, I'd like to look. But if you are telling us that aluminum can be substituted for steel, well that's not news.