I heard that they were having issues and no one is answering the phone any longer. Anyway can anyone, or does anyone have 2 Blue Thunder, Medium Risers, 16 bolt exhaust, in stock that will flow around 400 cfm? I need them bare with just a valve job.

They are probably just shut down for the holidays.They looked open on monday when I dropped off my shortblock to Barry R.

69 R code Mustang coupe 68 1/2 R code Mustang coupe 70 ram air Drag Pack Cougar 67 505 F.A.S.T legal Fairlane

I have several head sets in process there right now. They - like many Detroit area shops - are running with a reduced staff and shorter hours right now. Decidely open though. They are not Blue Thunder dealers any more - and have not been for quite a while. I provide pretty much all of the BT product that runs through their shop. The BT FE heads have been in short supply for several weeks now, as they make them in batch runs - more are in process but no definite delivery date. I have not seen a 400cfm set of BTs yet on ET's 1020 bench - closest were some of Jay's high risers that went 391.

Barry Rabotnick
Survivalmotorsports.com

BT MR heads flowing "As Cast"? Wasn't it in the mid 300's?

We generally do a CNC program on the chamber while leaving the ports alone. After valve job and blend we end up at roughly 353 at .700 with a 2.200 intake valve.

Some comparative data is below. Remember that every flow bench seems to read a bit different - use the information for comparative between heads on that same bench and you'll be OK.....

http://www.survivalmotorsports.com/FE-Heads.html

Barry Rabotnick
Survivalmotorsports.com

Beautiful, and the money is right for those BTX's . I think you could fit those nicely on a 445 4.08 bore (with a small scallop on the exhaust sideof the bore) 4.25 stroke and have a monster!

We are a dealer for the Blue thunder heads but like Barry said they are hard to get and you have to buy them when they make them. We can order what you want and waite and see when we will get them. On the heads you want you do not say what bore size or what valve sioze you want to run. The Medium Riser heads will max out at about 380 cfm and that is with a race style valve job and at least a 2.25 intake valve. We have done the Blue Thunder High Riser head with a 2.25 valves that flowed a little over 400 cfms on our 1020 bench on a 4.310 bore fixture. If you are not running more than .700 lift you need to look at the flow at .400 to .650 lift and not worry about the max flow at .800 or .900 which will do you no good. We do some stuff over .900 lift and then we look more at the .500 to .900 flow numbers. Just a lot more to it tham flow as well when it comes to the heads. Good luck, Keith Craft