2 heads better than 1 - power porting E7TE iron.

[Carnut1]

Stan, the print out is what it is. I don't know if this dyno can do that. It is an older superflo.

[PRH]

Well...... if you can believe the column listed as fuel #/hr, and the correction factor was as high as around 10%........the bsfc would have to be in the mid-3’s...... which seems pretty optimistic.

[Carnut1]

Thanks for the input. We will take a look at that.

[PRH]

What was the uncorrected hp @4700?

[Kbails]

guessing 317@4900 for ported heads

[jcisworthy]

I think my heads will go closer to 340 hp

[Carnut1]

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First pull DV- Charlie E7TE heads with stock sled rockers. Sheet states rollers but is wrong. Thanks, Charlie


Terry quote after first pull," That is horrible! Horribly good!"

[Carnut1]

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Add Full roller rockers to see if the reduced friction and full 1.6 ratio was worth some power.

[Carnut1]

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DV-Charlie E7TE with full roller rockers.

[Carnut1]

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Ported by John Jcisworthy, E7TE with Comp 1.6 full roller rockers on 7/16" studs and guide plates. John's chamber was smaller and was tried with multiple pulls to get max timing right 30 degrees was the number, 28 and 32 lost power. The sound of these heads was different from mine hard to explain. Exhaust to me sounded more bbc than mine did.

[RevTheory]

I hope you're not making the old man cart a bunch of iron heads back and forth, Charlie

Sounds like a fruitful and fun day.

[Carnut1]

I hope you're not making the old man cart a bunch of iron heads back and forth, Charlie

Sounds like a fruitful and fun day.

DV said," It was a rough day, no rum in my coffee."

[jcisworthy]

Resized_20181108_155641_175.jpegPorted by John Jcisworthy, E7TE with Comp 1.6 full roller rockers on 7/16" studs and guide plates. John's chamber was smaller and was tried with multiple pulls to get max timing right 30 degrees was the number, 28 and 32 lost power. The sound of these heads was different from mine hard to explain. Exhaust to me sounded more bbc than mine did.

Heads did what I expected Charlie, I am happy with those numbers.

[Carnut1]

I thought we were running a longer duration hydraulic roller cam. For the cam we have I think both sets of worked E7's could hurt some feelings. Thanks, Charlie

[PRH]

No comments from the dyno crew about the second set of ported heads making slightly less power despite using over 20#/hr more fuel?