First McCarty Racing RAV Crate Engine

This engine was our first of several crate engines to be produced.  This engine is to represent what guys can hope to get with just bolt together items at home:

4.22 bore x 4.250 stroke (about 480 inches)
RAV heads McCarty racing (mild port job $2500 option)
RAV as cast street tunnel ram & RAV as cast single street intake(no porting)
Twin Holley street 750 Holleys by Tom Vaught & single 1150 dominator
RAV street one piece 2 inch street headers
OEM Pontiac block 1975
Roller street/strip cam set up (stock diameter reg cam bearings)
Crower Mechanical Roller lifters
Harlan Sharp stud mounted rockers (1.65 ratio no stud girdle)
Street Strip valve springs (like all the BBC guys use)
Ross pistons no lightening
Standard Eagle Rods
Standard Eagle Crank
Mallory Unilite street distributor
10W30 break in oil
Regular Milodon steel oil pan no scraper, no crank tray
SD performance mega brace

739HP@6800/630TQ@5000

This engine as 0.040 quench and only 10 to one compression. It also has unported intakes. We used no evacuation system just breather caps. We only got 7 good pulls and the dyno broke. This dyno sheet was with 80 jets(13 to one), we went to 77(14 to one) and it was too lean. Tom was pretty close. Maybe a few more ponies with 78 or 79s

As you can see by the BSFC numbers at 6800 that is where we lost the street valve springs, so we think it will make tons more power with a bit more valve spring

We will probably port the intake a bit, zero deck the block and bump compression to 11.5 to one, scraper, crank tray, more valve spring

McCarty Racing
RamAirV.com
lmc3470@aol.com
317-260-3486(day, night or weekends)  

How about an option for pistons to bring up the compression to 13:1-15:1  

I'm curious.,. what is the VE on that engine.
At what Rev's does it approach 100% and more, and what Rev's does it fall below 100% again.

 
When The Flag Drops,,,



The Bull Chit Stops,,,


P. Engineer, Engine Builder

Is this with iron heads or aluminum?????????  
Horsepower sells engines and torque wins races

It would have to be aluminum.

 
When The Flag Drops,,,



The Bull Chit Stops,,,


P. Engineer, Engine Builder

I would think so as well but just thought I would ask.  
Horsepower sells engines and torque wins races

For 2500 bucks they would have to be.  

Here's the heads .    

WOW!!!
Beautiful RA-V tunnel ports.,. $2500 for a set of these beauties is not unreasonable

 
When The Flag Drops,,,



The Bull Chit Stops,,,


P. Engineer, Engine Builder

That might be 25 for just the porting.  

That's not for the heads that's the port job option. (mild port job $2500 option)  
Horsepower sells engines and torque wins races

OK.,. $2500 for a "mild" port job is more than double the going rate.
I thought the heads were $2500, as the pic showed.,. my oops

 
When The Flag Drops,,,



The Bull Chit Stops,,,


P. Engineer, Engine Builder

We put this together with 0.040 in the hole.  Since this is street engine we wanted to keep it low.  Our next go around we will bump to 11.5 which is still viable for a street engine.  After that we will prepare as the standard bracket engine with a bit more technology, but relatively low cost.

Lynn
lmc3470@aol.com
http://www.facebook.com/media/set/?set=a.10150359528558593.400730.669628592  

tuffnuff:
I'm curious.,. what is the VE on that engine.
At what Rev's does it approach 100% and more, and what Rev's does it fall below 100% again.



This engine was mostly limited by valve spring. We didnt install the hat on the top.  They dyno broke 3 times so we only got 7 pulls.

Lynn
lmc3470@aol.com
http://www.facebook.com/media/set/?set=a.10150359528558593.400730.669628592  

Well these are ported for the street keeping the ports as small as possible.  The ports got kind of big at the flange making them look bigger than they really are because we were experimenting with flow. Believe it or not making the port bigger at the pushrod tube didnt improve flow.  They are much smaller down the intake ports.

Yes the heads are $2500 for the castings with guides and pushrod tubes, or we also have a head porters head for moving valve location and CNC porting programs.  This set of heads have a $2500 port job via BES Racing.  Some guys in the heads up arena pay upwards of $12k.  We have a set of those under development currently for a heads up 620 cubic inch RAV.  

Lynn
lmc3470@aol.com
http://www.facebook.com/media/set/?set=a.10150359528558593.400730.669628592