BIG BLOCK FORD
Would you like to react to this message? Create an account in a few clicks or log in to continue.

Jon Kaase SR71 Cylinder Heads

+60
torino501
427John
CDMBill
Carbguy
jasonf
SandHillsHillbilly
cletus66
BOSS 429
Lukesportsman
738drvr
Ol'Blue77
Mikejc
6t6mustang
MidnightbluS10
psfracer
c.evans
res0rli9
terryk105
IDT-572
stanger68
BBF552
Dave De
HorsinAround
BigBlockRanger
ED468
fordsrgrt
nitrous.f
Carl
windsor
boss9coupe
Mark Miller
nuclearcobra
Stimie
Curt
Mark O'Neal
cobrakid8
Coupe Devil
whatbumper
STR-LGL-70
DGS
Gary Blair
glenevans
Paul Kane
litshoot
68formalGT
hbstang
jonkaase
68galaxie
JBR-3
dfree383
nascar429
TravisRice
rmcomprandy
jbozzelle
BBFTorino
wayney
bruno
Lem Evans
enginetech
Doug Rahn
64 posters

Page 12 of 12 Previous  1, 2, 3 ... 10, 11, 12

Go down

Jon Kaase SR71 Cylinder Heads - Page 12 Empty Re: Jon Kaase SR71 Cylinder Heads

Post  68formalGT April 27th 2023, 12:22 am

G-Code wrote:
68formalGT wrote:G-Code, is that any better?Jon Kaase SR71 Cylinder Heads - Page 12 Screen10

Much better.  

Thanks

It says nothing about raising the port, or altering the floor on either of them to make for a better short turn.   Rats
That would be helpful. Changing that push rod pinch is certainly a winner and that would eliminate the turn before the short turn, so the floor would be more balanced.

New A460 head progress.
Last night on the flow bench we saw 450 cfm with a 2.320" valve through a 3.47" CSA  =  311 fps.  0n a 4.50" bore.

Got the flow to mellow out through it's rough section  @ .750" - 800" lift where it wants to get unstable.

We hope to maintain the smoothness and flow percentages  with a 2.380 valve. ... Work in progress

Raising the port would give the brand X guys a way to complain that it's no longer "conventional port" legal 😂
68formalGT
68formalGT

Posts : 862
Join date : 2012-02-13
Location : Pueblo West, Colorado

G-Code likes this post

Back to top Go down

Jon Kaase SR71 Cylinder Heads - Page 12 Empty Re: Jon Kaase SR71 Cylinder Heads

Post  supervel45 April 27th 2023, 1:39 am

^ $4,350 for steel rocker stands, Kha Ching. Looks like you could have 8-10K in those A460's pretty quick.

I surprized nobody snagged the Thor's for $2,500 yet. They look like Gen II's and you never see them up for sale.

You will make your goal with what you have G-Code and have plenty of money left over for gas.

supervel45

Posts : 4305
Join date : 2013-09-04

Back to top Go down

Jon Kaase SR71 Cylinder Heads - Page 12 Empty Re: Jon Kaase SR71 Cylinder Heads

Post  G-Code April 27th 2023, 12:17 pm

supervel45 wrote:^ $4,350 for steel rocker stands, Kha Ching. Looks like you could have 8-10K in those A460's pretty quick.

I surprized nobody snagged the Thor's for $2,500 yet. They look like Gen II's and you never see them up for sale.

You will make your goal with what you have G-Code and have plenty of money left over for gas.

The Thor's -  solid heads no water. And yes the Eliminators are going to be costly with those stands.


Last edited by G-Code on April 27th 2023, 12:19 pm; edited 1 time in total

G-Code

Posts : 180
Join date : 2010-07-12

Back to top Go down

Jon Kaase SR71 Cylinder Heads - Page 12 Empty Re: Jon Kaase SR71 Cylinder Heads

Post  G-Code April 27th 2023, 12:18 pm

[quote="68formalGT"][quote="G-Code"]
68formalGT wrote:G-Code, is that any better?[url=https://servimg.com/view/18825961

Raising the port would give the brand X guys a way to complain that it's no longer "conventional port" legal 😂

True .

G-Code

Posts : 180
Join date : 2010-07-12

Back to top Go down

Jon Kaase SR71 Cylinder Heads - Page 12 Empty Re: Jon Kaase SR71 Cylinder Heads

Post  supervel45 May 16th 2023, 12:36 pm

rmcomprandy wrote:
Lem Evans wrote:
nascar429 wrote:
Lem Evans wrote:It appears that the exh. side of the chamber is wider that the 4.562" bore. Is that the case?

Yes that is correct there is a slight over hang of the bore into the exh side of the chamber maybe about .020" or 0.30" or so.. i'd say a 4.600" bore would have little or no overhang into the chamber.. I did put the dowels in the deck to make sure the head was square.  

when i get a chance out of curiosity i'll do a dummy up with cam, lifters, rocker etc..and see how much exhaust valve clearance there is from the bore when the valve is open..

That being the case, a guy needs to get a head gasket that fits the chamber rather than the bore. The TFS A460 heads are the same way in that regard.

Do you think .030" offset dowel holes would be enough for a 4.390" bore using the normal 4.500" bore gaskets...?


Did you ever get a chance to look into that?

It sure looks like it would unshroud the exhaust valve from the pictures here, even on the large bore block it's on, on page 10, and center the chamber better?

I could see where it would be a lot of hassle for little gain, and would affect intake valve radial clearance.

Any other issues do doing it?

Looks like they make offset dowel pins for BBC and none for BBF.

supervel45

Posts : 4305
Join date : 2013-09-04

Back to top Go down

Jon Kaase SR71 Cylinder Heads - Page 12 Empty Re: Jon Kaase SR71 Cylinder Heads

Post  Sponsored content


Sponsored content


Back to top Go down

Page 12 of 12 Previous  1, 2, 3 ... 10, 11, 12

Back to top

- Similar topics

 
Permissions in this forum:
You cannot reply to topics in this forum