[Formulajones]

I've been running a repop RAIV intake for a few years now. I found nothing wrong with it, was no worse than the factory iron piece I pulled off. In fact these repop casting were done using an original OEM manifold, they were never really that perfect either if you've looked at enough of them.

As far as performance, been racing the car for 25 years with the original iron intake. Switching to the repop RAIV intake did absolutely nothing to ET or MPH, it runs "THE SAME"

The only reason for the change was knowing in the future I'd be building a RAIV clone for the car and figured I'd grab an intake while they were still available. Decided to just throw it on the car a few years back to experiment with a couple other ideas. One of those being how the heat cross over acts in a daily driver pump gas situation in the Arizona heat, since I daily drive this car as well.

Happy to report the separate heat cross over certainly helps with heat soak and hot starts, keeps the intake cooler, all while keeping my divorce choke functional. And on the cold winter days where it's in the teens in the mornings, there are no drivability issues at all.

On a side note, the 455HO I built a few years ago, had an OEM 71 HO intake on it and the ports weren't any better on that than my repop piece, which is said to be patterned off of it anyway, and I could see the similarities. That engine went on to make 507/571 on the dyno with that intake in place sitting on top of ported HO 197 heads by Dan Barton, and no modifying to the intake ports was needed. That was through the stock cast RA exhaust manifolds as well.

So the intake does work well and can support some HP right out of the box.

[promptcritical]

Originally Posted by Formulajones

I've been running a repop RAIV intake for a few years now. I found nothing wrong with it, was no worse than the factory iron piece I pulled off. In fact these repop casting were done using an original OEM manifold, they were never really that perfect either if you've looked at enough of them.

As far as performance, been racing the car for 25 years with the original iron intake. Switching to the repop RAIV intake did absolutely nothing to ET or MPH, it runs "THE SAME"

The only reason for the change was knowing in the future I'd be building a RAIV clone for the car and figured I'd grab an intake while they were still available. Decided to just throw it on the car a few years back to experiment with a couple other ideas. One of those being how the heat cross over acts in a daily driver pump gas situation in the Arizona heat, since I daily drive this car as well.

Happy to report the separate heat cross over certainly helps with heat soak and hot starts, keeps the intake cooler, all while keeping my divorce choke functional. And on the cold winter days where it's in the teens in the mornings, there are no drivability issues at all.

On a side note, the 455HO I built a few years ago, had an OEM 71 HO intake on it and the ports weren't any better on that than my repop piece, which is said to be patterned off of it anyway, and I could see the similarities. That engine went on to make 507/571 on the dyno with that intake in place sitting on top of ported HO 197 heads by Dan Barton, and no modifying to the intake ports was needed. That was through the stock cast RA exhaust manifolds as well.

So the intake does work well and can support some HP right out of the box.

Larry, I think you're referencing my motor the you built. The heads are '72 7F6s. Not to pick nits. LOL

[Formulajones]

Originally Posted by promptcritical

Larry, I think you're referencing my motor the you built. The heads are '72 7F6s. Not to pick nits. LOL

My bad a 72 not a 71