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Re: IR manifold for a small block? [Re: Jerry] #171412 12/22/08 11:40 PM 12/22/08 11:40 PM
Joined: Jan 2005 Posts: 12,487 Kalispell Mt. H HotRodDave OP I Live Here
HotRodDave OP I Live Here H Joined: Jan 2005 Posts: 12,487 Kalispell Mt.	I helped a friend last winter put a 1000 suzuki motorcycle carb on a 2.0 litre D-50 engine with a home made IR manifold and it ran pretty good The reason for a IR manifold is driveability, you can run a big cam to make HP and still get it to idle smooth. It helps smooth out the TQ curve, low rpms the cylinders are not trying to pull the breath out of another cylinder and massive airflow at high rpms. I think it could be fast, driveable and look awesome if done right Right now there is about 18 inches snow on the roof of the cuda so.... wher is the twidling thumbs smiley? I am not causing global warming, I am just trying to hold off a impending Ice Age!

Re: IR manifold for a small block? [Re: HotRodDave] #171413 12/23/08 01:38 PM 12/23/08 01:38 PM
Joined: Jan 2003 Posts: 4,821 Moved to N.E. Tennessee GomangoCuda master
GomangoCuda master Joined: Jan 2003 Posts: 4,821 Moved to N.E. Tennessee	Quote: The reason for a IR manifold is driveability, you can run a big cam to make HP and still get it to idle smooth. It helps smooth out the TQ curve, low rpms the cylinders are not trying to pull the breath out of another cylinder and massive airflow at high rpms. I think it could be fast, driveable and look awesome if done right For some reason I am thinking that if it had all those advantages it wouldn't have been abandoned over 30 years ago. If you go to Hilborn's or Kinsler's websites you will see many variations of Small block IR fuel injection systems. Typical throttle bore sizes are way bigger than any available carburator. 2 7/16" - 2 5/8" are common and they can be as big as 3". At least with F.I. the pulseing that goes on in an IR arrangement doesn't disrupt fuel delivery like it does in carburetors. The bottom line is that the reason they quit using IR manifolds back in the day is because everyone that put a plenom on top of their IR manifold went faster. In theory, there is no difference between theory and practice. In practice, there is.

Re: IR manifold for a small block? [Re: HotRodDave] #171414 12/23/08 01:39 PM 12/23/08 01:39 PM
Joined: Jan 2003 Posts: 14,610 Not2farfromNashville, TN R Rug_Trucker I Live Here
Rug_Trucker I Live Here R Joined: Jan 2003 Posts: 14,610 Not2farfromNashville, TN	Quote: Right now there is about 18 inches snow on the roof of the cuda so.... wher is the twidling thumbs smiley? Why isn't it in the garage? You and I have had this discussion when you were living here. Maybe run 8 VW Solex carbs? "The only thing to do for triumph of evil is for good men to do nothing" "NUNQUAM NON PARATUS!"

Re: IR manifold for a small block? [Re: Rug_Trucker] #171415 12/23/08 01:49 PM 12/23/08 01:49 PM
Joined: Jan 2005 Posts: 12,487 Kalispell Mt. H HotRodDave OP I Live Here
HotRodDave OP I Live Here H Joined: Jan 2005 Posts: 12,487 Kalispell Mt.	Well I got my wife pregnant 8 months ago and it is cold and slipery out side so she gets to use the garage, wasn't thinking ahead was I I am not causing global warming, I am just trying to hold off a impending Ice Age!

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