Flow Numbers 690 Heads

[1961BelAir427]

You're welcome. Pretty sure I speak for everyone here about that......and also it applies to a lot of the members here. There are several of you who do a lot of their own work and have incredible cars. A lot of them posting in this very thread. I'm glad all of you are W motor enthusiasts, but just think what any of you could accomplish with one of those easy/cheap engine platforms. (Nowhere near as much fun in that though!)

 

[61 Bubble]

Jim and others, one thing that people are missing is the use of lighter valves and related hardware. This to will aid in the reduction of defection thru the motion of the lifter.

 

[Dr Richard Kimble]

Nice,are you going to run it straight up,or advanced?Who ground it for you?

Cam is from Comp .
at the moment , it's straight up . If the engine ends up a bit "soft" at low rpm , I may advance it .

flat tappet for idiots ? !
no
flat tappet for those who would like money left over for gas !
hyd roller is nearly 3 1/2 times the cost of a flat tappet . also , there seems to be a concern with controlling them at high rpm .

 

[Ishiftem]

My 690s with my home porting

.100 79
.200 166
.300 241
.400 280
.500 304
.600 313
.700 321
.800 324

 

[jim_ss409]

Way to go!
I can't wait to see how it runs in the spring.
I think it's going to be good.

 

[Ronnie Russell]

Great numbers, Dan. Good job !!

 

[1961BelAir427]

Excellent numbers Dan. As a side benefit you probably ground an extra 4 pounds off the front end of the car with all that port work!!!

 

[Iowa 409 Guy]

Looks like you're getting most all there is Dan.

 

[61 Bubble]

Doing pretty good with the 690's casting I think. Looking like within 6% of what Nick's getting out of his eddy's full out????

Nothing against Tom or Jim's guy at AP racing, BOTH are getting within 6% of what Nick's MAXED out Eddy's as per the other thread. Wonder if Nick could get even closer with some other "tricks" that could be possible.

 

[Ishiftem]

I'm sure there is some more left. I don't have enough material left to play with valve/seat angles so that's out. I can take a little more out in the pinch area which I will do. The bowl area I won't touch. Without a junk head to experiment with before hand I am at the point where I could easily do more harm than good. The guy who flowed it said it was a quiet port. Now I have to do the other seven

 

[1961BelAir427]

Now I have to do the other seven

Oh man that's a lot of grinding, at least the closer to finished you get the easier it will be. Hope you're wearing a mask & eye protection.

 

[Ishiftem]

I do wear protection - most of the time.

 

[61BUBBLE348]

Well,

my heads and intake I bought from Dave have finally arrived home, if Dave agrees I can post some pic's

 

[yellow wagon]

Oh man make sure you wear eye protection and a mask for sure. I rigged up a shop vac and some duct tape when I ported my heads. I could taste iron dust for weeks after I was done….and my hands got the shakes for awhile too from running the grinder. Not fun work thats for sure!

 

[64ss409]

That dust will rust your lungs.

 

[61 Bubble]

So what IS the BEST cast intake for these heads to make power??? I know I can get a sheetmetal made that will work, and my Eddy dual quad is ok for now, but what is out there that's better??? I image if you CAN get the Speed Port 7000, it would be right up there, but anything in a 2X4 set up???

 

[1961BelAir427]

The LWA / CRW single plane and the M/T Crossram are all that was ever cast for these that I know of.

EDIT: Weiand made a tunnel ram looks like the Hi-Ram series. I've seen pictures of ONE only. Has to be rarer than rare!

 

[63 dream'n]

 

[Dr Richard Kimble]

THAT is cool , dream'n

 

[1961BelAir427]

That's it. Never seen any other pictures of one before.