roller lifters with 2.8

[veekuusi]

Yesterday was significant day so to say, because 2 race Ford Capri`s were dynoed
the same day.They are the only race Capris here in Finland.
Morning begun in the dyno place with my friends Capri which has a 2900 cc Ford Cosworth 24v V6 engine.
But soon a big bang could be heard , and thats it.
Oil and water was coming out of the oil pan.
Total loss with the engine.
We do not know yet what happened.
It broke a valve or connecting rod or something.

Edit: http://www.youtube.com/watch?v=kdWjY...wNQCOg&index=1
My friend has done a video from the dyno.
Listen carefully when it comes to 3 min time.
You can hear damage inside the engine, knocking.





My friends Capri out of the dyno place and mine in.
I had better luck than my buddy.
With the new bigger plenum , I could gain some hp.
186.6 kw = 253.7 hp 7810 rpm
261.6 Nm (193 lb-ft) 5850 rpm
The numbers are WHP, the dyno can not calculate the crank hp.
But if we say the driveline loss is 15 % with RWD , then the crank hp is 292 hp.
Not bad with a single carb.

Mr Ericjon 262 is right with theory of the bigger plenum.
The bigger the plenum, the more hp.
Maybe I run the engine this season with this intake,
but it is sure, I manifacture a new intake for next race season.

We also managed to get some exhaust temperatures.
They were as follows
4000 rpm 600 celcius (1112 F)
5000 rpm 650 (1202 F)
6000 rpm 700 (1292 F)
7000 rpm 750 (1382 F)
8000 rpm 800 (1472 F)
The difference between the left and right bank was something
like 50-70 celcius (122 F - 158 F).
The right bank was the hotter in every case.

http://www.youtube.com/watch?v=VdxCqtoqvS8

[Fireball]

Those are some incredible power numbers man!

Good work

[34blazer]

that little 2.8 sounds wicked!

[SappySE107]

Damn, I was hoping to see what the Comp cam would do.

[Guest]

I just stumbled across this thread now.

Great work!

As suggested creating an air gap under the runners of the intake will help with your power goals. The less heated the runners and therefore the air passing through them gets, the more power you can make. Also, once you get a design that works, I strongly suggest building another one out of aluminum, this will also help dissipate the heat.

I'm going to look into that clutch set-up, I'm going to need something like that, or 3 disc for my set-up eventually.

[unchained01]

DAMN SON That sounds better than the cosworth !!!!!

[mrmakeitworse]

Congratulations Suomi racer veekuusi !!!

AWESOME car !!

FWIW the 1974 Ford 2.8 was good for 240-260 hp with the parts and technology available in the 1988.

GM 2.8 heads have better port design than beloved Ford 2.8
I am not surprised at your dyno numbers and had no doubt about the power you would get and believe you will make more power yet as you continue to develop this package.

My bet is next year you will post dyno sheet of 225 KW

Also by the way I love your car. 1974 Capri was my favorite.

I was content to just read here.....until I found this thread.

[ericjon262]

Looking good man!

[veekuusi]

Hey guys , thanks for your comments , I appreciate them.
"I try to keep my feet on the ground".

To gain some extra hp, today I cut off the upper section of the intake.
To make the plenum bigger.
Just have to weld those sides closed.
The plenum was a tube and now the volume becomes twice that much.
Easy to do and doesnt take much time.
I have to visit the dyno at least once before the race season starts,
to see the gain of this making.

[veekuusi]

I guess it is time to give some input what has happened with this project.

It was a mistake to make the plenum bigger.
I went to the dyno and lost some 20 hp.
The plenum was little less than 1 liter , that is like 1 quart.

The first race in this season was 3 weeks ago.
Everything went quite well.
I did not win, but there was no damage in the motor what so ever.
Only problem was , that I had not enough hp.
Couple of cars went faster.

So, what to do next.
I decided to continue with The Holley carb (390 cfm douple bumper), and a new intake for that.
Here is what it looks now.

[veekuusi]

The new intake for the Holley carb is ready.
I know it looks awful, but it doesn`t bother me none, important is to see if it works or not.
That means , if I can get more hp out of it than the 3-barrel carb version.
Next step is to visit dyno.

I made a plate to devide the plenum.
Intake can be used with or without it.
Let`s see, which way is better.

[veekuusi]

Just to make sure, nobody thinks a cardboard is strong enough to hold in the plenum,
I made the final plate out of 3 mm aluminum.







Blue smoke came out of the exhaust pipes.
That means burnt oil.
I took the intake out and had to check the intake gasket.
It was not 100 % "solid".
I put a new one.
And there was some misaligment in the runners.

I have to cut those intake gaskets bacause of the roller lifters.
Otherwise the roller lifters hit the gasket.





Now putting things together again.

[Purple pit]

Can't wait to see it all cleaned up! Did you take those support rods out of the plemun after you welded in the plate?

[pocket-rocket]

I don't think the plate is meant to be permanent yet. It's made to be taken out to see if it runs better with or without first.

[Purple pit]

Oh ok, now I understand.