Re: Indy 426-1 heads what to expect
[Re: biff426]
#2071331
05/11/16 10:21 AM
05/11/16 10:21 AM
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Joined: Jan 2003
Posts: 13,357 Marion, South Carolina [><]
an8sec70cuda
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 13,357
Marion, South Carolina [><]
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I'm not sure if you could get a real stock type manifold to work on the Indy heads. They use a valley plate just like the wedge heads do. I've used the valley plate and Indy manifolds on stock type heads, but not vice versa. I think you'd have to do some milling to the bottom of the manifold to get it to clear the valley plate.
CHIP '70 hemicuda, 575" Hemi, 727, Dana 60 '69 road runner, 440-6, 18 spline 4 speed, Dana 60 '71 Demon, 340, low gear 904, 8.75 '73 Chrysler New Yorker, 440, 727, 8.75 '90 Chevy 454SS Silverado, 476" BBC, TH400, 14 bolt '06 GMC 2500HD LBZ Duramax
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Re: Indy 426-1 heads what to expect
[Re: biff426]
#2071675
05/11/16 09:11 PM
05/11/16 09:11 PM
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Joined: May 2004
Posts: 12,386 Taxes & Virus's R-US, NY
Dragula
I Live Here
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I Live Here
Joined: May 2004
Posts: 12,386
Taxes & Virus's R-US, NY
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I am looking to build a 800hp gen 2 Hemi and waslooking at the Indy 426-1 heads. I have used the 440-1 and 440SR heads in the past on builds. What "pit falls" will I run into with the 426-1 heads? Will stock type intakes work on these heads? They are heavy for one, they are an inch wider when assembled on an engine over stock heads, they are taller, and in unported form, not a lot of fun. Maybe a little over 600hp on my 484 Hemi....Went 10.7 on my street/strip car. I had a set. I ran them for years. I was never impressed with the flow numbers or the performance. I ended up porting them just to get 398cfm out of them, but the big valve Hi-po heads just kill them. We will see what my 605 runs with those on it, but flow wise, How about 458cfm....And they are a lot lighter. Should be interesting.
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Re: Indy 426-1 heads what to expect
[Re: LAD 524]
#2071912
05/12/16 08:40 AM
05/12/16 08:40 AM
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Joined: Nov 2004
Posts: 3,619 Norwich CT USA
Defbob
master
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master
Joined: Nov 2004
Posts: 3,619
Norwich CT USA
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Do the HiPos have the same cast in rocker shaft stands that the 426-1s do?
The HiPos are the Canfield heads. They are high flowing stock replacement style heads, much like Stage V. Indy bought the molds when Canfield went bankrupt.
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