Hot Rod Forum : Hotrodders Bulletin Board - View Single Post - Compression on street tunnel ram
View Single Post
  #6 (permalink)  
Old 11-23-2007, 12:21 AM
F-BIRD'88's Avatar
F-BIRD'88 F-BIRD'88 is online now
Yada Yada Yada
Last photo:
Join Date: Oct 2005
Location: Ontario, Canada
Posts: 9,211
Wiki Edits: 0

Thanks: 5
Thanked 389 Times in 383 Posts
The hi rpm prostock type tunnel ram has larger and shorter runners. Its tuned to get busy at 5000rpm and up. It wants a very long duration, high rpm camshaft which requires a high static compression ratio to make any cylinder pressure and torque.
A street TR is tuned much lower (longer/smaller runners).
The torque peak point and usable rpm range will be similar to what a Vic JR does. but the torque range is actually a little broader with the STR. It's a mid rpm manifold 3000 to 7000rpm is best. It will make more torque and power than a Vic JR.

You can use a pair of 600's as long as the minimum WOT rpm on launch or gear change is high enough to meter the fuel properly enough to get a decent AFR at that low rpm point. You need a minimum amount of venturii velocity to get the mains started flowing fuel. The higher the minimum rpm (stall speed) the better the motor will tolerate big carbs. I would use a minimum of a 3500 stall converter.
A 4000-4500 stall even better. A bud if mine runs two 750's on a chrysler 440 TR but runs a 5000+ stall. Vac sec/air door carbs will add some flexability.
Are these 600's Vac sec carbs..or D pumpers?

Last edited by F-BIRD'88; 11-23-2007 at 12:31 AM.
Reply With Quote