Wondering

Jim Hanig · 01-28-2017, 09:03 PM

Why the 1970 71 are allowed to run the older type intake on the 375 425 402 454, and the lower hp 365 454 and the 300 402 are stuck with the low terrible intake.?

Billy Nees · 01-29-2017, 08:52 AM

rectangular port heads vs. oval ports.

BBF67 · 01-29-2017, 10:46 AM

Everyone knows that both rectangular port and oval port big blocks used the low profile intake on all models of Chevrolet for 70-71. Someone in the tech dept believed bogus data that was submitted by a non-racer "expert" and allowed the taller intake from earlier years to be accepted.

Billy Nees · 01-29-2017, 10:49 AM

Quote:

Originally Posted by BBF67

Someone in the tech dept believed bogus data that was submitted by a non-racer "expert" and allowed the taller intake from earlier years to be accepted.

There seems to be an awful lot of that going around lately!

Chipper Chapman · 01-31-2017, 08:00 PM

I'd love to be able to put a 69 high rise iron on our 71 LS5! lol

Jim Hanig · 02-01-2017, 06:02 PM

Quote:

Originally Posted by Chipper Chapman

I'd love to be able to put a 69 high rise iron on our 71 LS5! lol

Have you ever tried one ?

Chipper Chapman · 02-02-2017, 05:42 PM

Quote:

Originally Posted by Jim Hanig

Have you ever tried one ?

I have my own dyno now so we are trying one for giggles this winter

Jim Hanig · 02-02-2017, 06:53 PM

Quote:

Originally Posted by Chipper Chapman

I have my own dyno now so we are trying one for giggles this winter

Thats, intresting i am going to port one and just see if its any better. On the dyno, let me know how yours works out and ill do the same.

01-28-2017, 09:03 PM	#1
Jim Hanig Senior Member Join Date: Aug 2006 Location: Pukwana SD Posts: 858 Likes: 555 Liked 97 Times in 47 Posts	Wondering Why the 1970 71 are allowed to run the older type intake on the 375 425 402 454, and the lower hp 365 454 and the 300 402 are stuck with the low terrible intake.?

01-29-2017, 08:52 AM	#2
Billy Nees VIP Member Join Date: Oct 2002 Location: On a hilltop in Pa. Posts: 4,218 Likes: 3,091 Liked 6,772 Times in 1,519 Posts	Re: Wondering rectangular port heads vs. oval ports. __________________ Billy Nees 1188 STK, SS Make tech "TECH" again!

01-29-2017, 10:46 AM	#3
BBF67 Junior Member Join Date: Dec 2001 Posts: 89 Likes: 0 Liked 8 Times in 4 Posts	Re: Wondering Everyone knows that both rectangular port and oval port big blocks used the low profile intake on all models of Chevrolet for 70-71. Someone in the tech dept believed bogus data that was submitted by a non-racer "expert" and allowed the taller intake from earlier years to be accepted.

01-31-2017, 08:00 PM	#5
Chipper Chapman Member Join Date: Jan 2004 Location: Belmont N.S. Canada Posts: 451 Likes: 210 Liked 141 Times in 63 Posts	Re: Wondering I'd love to be able to put a 69 high rise iron on our 71 LS5! lol __________________ Chris Chapman 1969 Chevelle NHRA F-G/SA 1090