Has anyone seen the new Thunder series AVS carbs? I know these are advertised as an off-road carb, but how would it perform on a street car? I like the looks of it (silver with black accents) and the fact that it is a 650 cfm. Opinions? (play nice now http://www.camaros.net/forum/wink.gif )

I saw those carbs at the SEMA show last November.They are very simular to the Edelbrock AFB.These new carbs however use an AVS ( Air Valve Secondary )... very simular to the old Carter AVS of the 1960's to early 70's.The secondary is spring loaded and is very easily adjusted.The Performer series AFB uses a counter weighted air valve.It is very dificult to adj these in any meaningfull way.They have problems especially going up a hill or in off road type applications.The air valve must kick foward to allow extra air through them.If under a heavy load going up a steep hill gravity wants to keep them from opening.The new AVS series is a very light air valve somewhat simular to a Qjets.These carbs also use the same metering rods and jets as do the Performer carbs.All in all they look pretty good and I think they will likely go a long way to curing the somewhat inconsistant secondary operation of the Performer AFB.

I havent seen them used on an actual running engine so what I just mentioned was from meeting with them at SEMA.

EDIT : I forgot to mention that they will initially be available in 650 CFM and 800 CFM.If these go well thay " might " make a 500 CFM available sometime in the future.

[This message has been edited by 69LS1 (edited 01-17-2003).]

Edelbrock has several versions. PN# 1825 and PN#1826 for off-road. while PN#1805 and PN# 1825 is for street.
I have the PN#1805 on back order with Summit. According to Edelbrock it won't ship until early March!