extrude honing....where and how much?
Thread Starter
Burning Brakes
Joined: Nov 2003
Posts: 1,011
Likes: 1
From: Marietta Pa
St. Jude Donor '10-'11-'12-'13-'14
extrude honing....where and how much?
So, you guys thankfully pointed out a bottleneck in my buildup.
The heads I bought flow 280cfm and I plan on using the superram manifold and runners to get that nice mid-range hump or torque.
However, the superram only flows 240cfm...so instead of trying to sell it and by a miniram (which would be easier to work on, but also does not have EGR), I think I might extrude hone the intake and runners.
I was just wondering if anyone had an idea of the "after" flow numbers? Is there an average extrude honing gets you? Say 30cfm or something?
Also, would it be better to extrude hone the superram or have it professionally ported? Can the runners be ported or extrude honed?
Trying to get ideas to not have a bottleneck.
The heads I bought flow 280cfm and I plan on using the superram manifold and runners to get that nice mid-range hump or torque.
However, the superram only flows 240cfm...so instead of trying to sell it and by a miniram (which would be easier to work on, but also does not have EGR), I think I might extrude hone the intake and runners.
I was just wondering if anyone had an idea of the "after" flow numbers? Is there an average extrude honing gets you? Say 30cfm or something?
Also, would it be better to extrude hone the superram or have it professionally ported? Can the runners be ported or extrude honed?
Trying to get ideas to not have a bottleneck.
Team Owner
Joined: Oct 2004
Posts: 81,241
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From: altered state
St. Jude Donor '05
Depends how long they run the stuff through, I have heard they can use a more agressive material in the mix if you want to get more gains.
Pricy but porting a TPI base is a royal pain and takes forever to do it right.
Pricy but porting a TPI base is a royal pain and takes forever to do it right.
Drifting
Joined: Oct 2006
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From: Romeoville IL
Race Director
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From: Overland Park Kansas
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I emailed around May and asked this question. Bases are nearly $400 to hone! The reason was because of a two steps process required to hone a base". However, runners were about 1/2 that @ $200ish.
They said to expect about 10% improvement in flow. I asked if additional material could be removed. They said no.
240*1.1=264cfm
So about $600 + round-trip shipping would still leave you short of 280cfm. Another thing to consider is that intakes should be sized 15% larger than head-flow. (Reason being that parts flow less when combined in "chain".)
That means you might want an intake that flows about 300cfm to be "optimal".
BTW: Do you have a stock base or large-tube base?
They said to expect about 10% improvement in flow. I asked if additional material could be removed. They said no.
240*1.1=264cfm
So about $600 + round-trip shipping would still leave you short of 280cfm. Another thing to consider is that intakes should be sized 15% larger than head-flow. (Reason being that parts flow less when combined in "chain".)
That means you might want an intake that flows about 300cfm to be "optimal".
BTW: Do you have a stock base or large-tube base?
Last edited by GREGGPENN; Oct 1, 2008 at 05:57 PM.
Thread Starter
Burning Brakes
Joined: Nov 2003
Posts: 1,011
Likes: 1
From: Marietta Pa
St. Jude Donor '10-'11-'12-'13-'14
I emailed around May and asked this question. Bases are nearly $400 to hone! The reason was because of a two steps process required to hone a base". However, runners were about 1/2 that @ $200ish.
They said to expect about 10% improvement in flow. I asked if additional material could be removed. They said no.
240*1.1=264cfm
So about $600 + round-trip shipping would still leave you short of 280cfm. Another thing to consider is that intakes should be sized 15% larger than head-flow. (Reason being that parts flow less when combined in "chain".)
That means you might want an intake that flows about 300cfm to be "optimal".
BTW: Do you have a stock base or large-tube base?
They said to expect about 10% improvement in flow. I asked if additional material could be removed. They said no.
240*1.1=264cfm
So about $600 + round-trip shipping would still leave you short of 280cfm. Another thing to consider is that intakes should be sized 15% larger than head-flow. (Reason being that parts flow less when combined in "chain".)
That means you might want an intake that flows about 300cfm to be "optimal".
BTW: Do you have a stock base or large-tube base?
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From: Overland Park Kansas
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IOW, the mini would cost less than honing (assuming you didn't keep your superram).
In case you haven't checked SR's are going for $1,200 used (base, runners, and plenum). Since you can't buy one new, people will pay the same for used. How's that grab ya?
Le Mans Master
Joined: Dec 2002
Posts: 5,270
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From: Seattle Area WA
http://www.thirdgen.org/techboard/al...fications.html
Do that and your intake won't be the weak point anymore. Also, if you can find someone to do that and do it well. Let me know...
Do that and your intake won't be the weak point anymore. Also, if you can find someone to do that and do it well. Let me know...
Thread Starter
Burning Brakes
Joined: Nov 2003
Posts: 1,011
Likes: 1
From: Marietta Pa
St. Jude Donor '10-'11-'12-'13-'14
I wonder if you're underestimating the resale value of a superram. I suspect you could get most, if not all the money you'd need to buy a miniram. Moreover, I'm certain the cost of honing -- added to the resale value of your SR would EXCEED the cost of a miniram.
IOW, the mini would cost less than honing (assuming you didn't keep your superram).
In case you haven't checked SR's are going for $1,200 used (base, runners, and plenum). Since you can't buy one new, people will pay the same for used. How's that grab ya?
IOW, the mini would cost less than honing (assuming you didn't keep your superram).
In case you haven't checked SR's are going for $1,200 used (base, runners, and plenum). Since you can't buy one new, people will pay the same for used. How's that grab ya?
http://www.thirdgen.org/techboard/al...fications.html
Do that and your intake won't be the weak point anymore. Also, if you can find someone to do that and do it well. Let me know...
Do that and your intake won't be the weak point anymore. Also, if you can find someone to do that and do it well. Let me know...
Thread Starter
Burning Brakes
Joined: Nov 2003
Posts: 1,011
Likes: 1
From: Marietta Pa
St. Jude Donor '10-'11-'12-'13-'14
Ok, here's a branch off the main question.
Lets say I kept the superram. How much power and tq would I make if I only spun the motor to 6k? Now, lets say I bought a miniram. How much power and torque would I make if I only spun the motor to 6k?
See what I'm saying? If the superram flows "only" 240cfm and the miniram flows 290 cfm or there about....but I loose low and mid end torque to the miniram, and only gain, say 20 hp because I'm going to be shifting at 6k....would it be wise for me to switch?
Basically, what I mean, is: do the flow numbers mean much? If a more restrictive intake makes more power where I want it, shouldn't I look at that and not the numbers?
Lets say I kept the superram. How much power and tq would I make if I only spun the motor to 6k? Now, lets say I bought a miniram. How much power and torque would I make if I only spun the motor to 6k?
See what I'm saying? If the superram flows "only" 240cfm and the miniram flows 290 cfm or there about....but I loose low and mid end torque to the miniram, and only gain, say 20 hp because I'm going to be shifting at 6k....would it be wise for me to switch?
Basically, what I mean, is: do the flow numbers mean much? If a more restrictive intake makes more power where I want it, shouldn't I look at that and not the numbers?
Pro
Joined: Jul 2002
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From: ceres ca
St. Jude Donor '08
