How well does a hopped up IDI do?
Lead Driver
Joined: Nov 2003
Posts: 6,900
Likes: 3
From: Campbell River, B.C.
Maybe, but not so much as a power adder from what I hear because it displaces air from the intake so peak power may not improve (fuel economy may improve though). You have to be much more sparring with it, and the gains will be smaller than on a turbo. I've wanted to do that for a long time but never got around to it.
The way my truck drives in cold foggy weather is proof enough for me that its worth trying.
The way my truck drives in cold foggy weather is proof enough for me that its worth trying.
Posting Guru
Joined: Apr 2008
Posts: 1,614
Likes: 0
6.9 you have 110 thousands to bore off and then it will equal a 7.3 liter so on a 6.9 you have plenty of roon to bore, on a 7.3 you really dont have much room to bore.
Methanoholic
Joined: Mar 2009
Posts: 6,442
Likes: 8
From: Maine (NorCal Native)
I know the bore differences!
That doesn't negate the fact that the walls are already to thin.
.110 bore size is .055 wall thickness. .055 is less than 1/16 of an inch!
It's a known fact that the 7.3 walls are to thin. How much, Who knows, Likely Nobody!
Do you really want to thin them up and find out! I don't, and I imagine most don't, who wants to ruin a block, Nobody!
So, I will stick to what I said, Don't bore unless you have to and only bore what you need to.
-Enjoy
fh : )_~
That doesn't negate the fact that the walls are already to thin.
.110 bore size is .055 wall thickness. .055 is less than 1/16 of an inch!
It's a known fact that the 7.3 walls are to thin. How much, Who knows, Likely Nobody!
Do you really want to thin them up and find out! I don't, and I imagine most don't, who wants to ruin a block, Nobody!
So, I will stick to what I said, Don't bore unless you have to and only bore what you need to.
-Enjoy
fh : )_~
Senior User
Joined: Jan 2009
Posts: 112
Likes: 0
From: easton, CT
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Methanoholic
Joined: Mar 2009
Posts: 6,442
Likes: 8
From: Maine (NorCal Native)
Why do you feel like an idiot, because of what I (we) said ... Don't do that, there is no need.
I didn't think of you as an idiot, I doubt others did either.
In fact, I thought your question was thoughtful, Boring is a method of increasing power.
-Enjoy
fh : )_~
I didn't think of you as an idiot, I doubt others did either.
In fact, I thought your question was thoughtful, Boring is a method of increasing power.
-Enjoy
fh : )_~
Post Fiend
Joined: Nov 2003
Posts: 21,285
Likes: 15
From: Nutter Fort, WV
Boring is a means to more cubic inches, but in diesels you also have to consider cylinder wall thickness and cavitation.
The thinner the cylinder walls are, the more likely cavitation will happen.
7.3 engines already have a cavitiation problem, so boring one out just makes the problem worse.
No need to feel any thing other than more informed now than you were before.
That is called learning, which is a good thing.
Not to many things you learn about gasoline motors apply to diesels, and I bet all your friends have gassers.
The thinner the cylinder walls are, the more likely cavitation will happen.
7.3 engines already have a cavitiation problem, so boring one out just makes the problem worse.
No need to feel any thing other than more informed now than you were before.
That is called learning, which is a good thing.
Not to many things you learn about gasoline motors apply to diesels, and I bet all your friends have gassers.
Senior User
Joined: Jan 2009
Posts: 112
Likes: 0
From: easton, CT
Boring is a means to more cubic inches, but in diesels you also have to consider cylinder wall thickness and cavitation.
The thinner the cylinder walls are, the more likely cavitation will happen.
7.3 engines already have a cavitiation problem, so boring one out just makes the problem worse.
No need to feel any thing other than more informed now than you were before.
That is called learning, which is a good thing.
Not to many things you learn about gasoline motors apply to diesels, and I bet all your friends have gassers.
The thinner the cylinder walls are, the more likely cavitation will happen.
7.3 engines already have a cavitiation problem, so boring one out just makes the problem worse.
No need to feel any thing other than more informed now than you were before.
That is called learning, which is a good thing.
Not to many things you learn about gasoline motors apply to diesels, and I bet all your friends have gassers.
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