Ported Throttle Body
Thread Starter
Pro
Joined: May 2004
Posts: 551
Likes: 19
From: Morgantown WV
Ported Throttle Body
Mods are in my profile.
I still have the mod bug and am considering a ported throttle body but I was told by my tuner that they're a waste of money.
Anyone have any comments???
I still have the mod bug and am considering a ported throttle body but I was told by my tuner that they're a waste of money.
Anyone have any comments???
Melting Slicks
Joined: Nov 2002
Posts: 2,884
Likes: 260
From: Jamison Pa
St. Jude Donor '11-'25
Ported Throttle Body
It will improve throttle response.
I have one I took off my '00 when I went to a 402/L92 combo. Worked great with all electrics if your interested.
$90.00 shipped
I have one I took off my '00 when I went to a 402/L92 combo. Worked great with all electrics if your interested.
$90.00 shipped
Racer
Joined: Nov 2006
Posts: 380
Likes: 1
From: Janesville Wisconsin
It will do nothing on a naturally aspirated engine. Unless you change the actual valve size in the TB no more air can possibly flow through it.
http://www.geocities.com/nova442.geo/TB_flow.pdf
http://www.geocities.com/nova442.geo/TB_flow.pdf
Burning Brakes
Joined: Feb 2005
Posts: 1,190
Likes: 0
From: Fayetteville AR
We had a similar post a few weeks ago. The ported TB does help a stock engine but is mostly in throttle response - much crisper from what I have read here and in a few magazines for Vettes and Jeeps.
Racer
Joined: Nov 2006
Posts: 380
Likes: 1
From: Janesville Wisconsin
its all psychological. Cup your hands around your mouth as if you were going to yell, now breath in. Now remove your hands and think how can this make me breath better than when my hands were there.
It doesnt make any difference at all.....none. Dont believe everything you read in a magazine.
If you want to find out if it really does anything put a vacuum gauge on your intake. "if" it were to make a difference you should have slightly less vacuum. Vacuum is caused by restriction and porting the TB does not make it any less restrictive or change the airflow characteristics in a NA engine, so the vacuum will not change. Your not gaining a thing. Unless your just doing it to shave some weight off??
Porting your TB will do the exact same thing as putting a bigger exhaust tip on your car.
It doesnt make any difference at all.....none. Dont believe everything you read in a magazine.
If you want to find out if it really does anything put a vacuum gauge on your intake. "if" it were to make a difference you should have slightly less vacuum. Vacuum is caused by restriction and porting the TB does not make it any less restrictive or change the airflow characteristics in a NA engine, so the vacuum will not change. Your not gaining a thing. Unless your just doing it to shave some weight off??
Porting your TB will do the exact same thing as putting a bigger exhaust tip on your car.
Thread Starter
Pro
Joined: May 2004
Posts: 551
Likes: 19
From: Morgantown WV
Intresting thread.
What pwtrip says makes sense. I was thinking there may be some benefit by reduced turbulance in the intake from rounding those sharp edges in front of the throttle blade but if the physical opening dimension does not change it makes sense that it won't flow more air.
Any more comments?
What pwtrip says makes sense. I was thinking there may be some benefit by reduced turbulance in the intake from rounding those sharp edges in front of the throttle blade but if the physical opening dimension does not change it makes sense that it won't flow more air.
Any more comments?
Intermediate
Joined: Feb 2006
Posts: 42
Likes: 0
From: HOLLY SPRINGS NC
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Intermediate
Joined: Mar 2005
Posts: 31
Likes: 0
From: Royal Oak MI
Yes, it "theoretically" CAN make a positive impact. Entry and exit conditions GREATLY effect airflow through an orifice. The hand drawing someone posted is not correct in any sense. Sorry.
Now, DOES it make a difference? Probably not on a stock motor. You could put it on an airflow bench. If it makes a difference on an airflow bench, then it still might not make a difference on the engine, as the engine might not flow enough air to make a difference anyway.
You could use a VERY sensitive vacumn gage at WOT or time the car through the traps.
Now, DOES it make a difference? Probably not on a stock motor. You could put it on an airflow bench. If it makes a difference on an airflow bench, then it still might not make a difference on the engine, as the engine might not flow enough air to make a difference anyway.
You could use a VERY sensitive vacumn gage at WOT or time the car through the traps.
Racer
Joined: Nov 2006
Posts: 380
Likes: 1
From: Janesville Wisconsin
Yes, it "theoretically" CAN make a positive impact. Entry and exit conditions GREATLY effect airflow through an orifice. The hand drawing someone posted is not correct in any sense. Sorry.
Now, DOES it make a difference? Probably not on a stock motor. You could put it on an airflow bench. If it makes a difference on an airflow bench, then it still might not make a difference on the engine, as the engine might not flow enough air to make a difference anyway.
You could use a VERY sensitive vacumn gage at WOT or time the car through the traps.
Now, DOES it make a difference? Probably not on a stock motor. You could put it on an airflow bench. If it makes a difference on an airflow bench, then it still might not make a difference on the engine, as the engine might not flow enough air to make a difference anyway.
You could use a VERY sensitive vacumn gage at WOT or time the car through the traps.
Last edited by Pwrtrip75; May 13, 2007 at 12:59 PM.
Racer
Joined: Oct 2003
Posts: 389
Likes: 1
From: Denver co
its all psychological. Cup your hands around your mouth as if you were going to yell, now breath in. Now remove your hands and think how can this make me breath better than when my hands were there.
It doesnt make any difference at all.....none. Dont believe everything you read in a magazine.
If you want to find out if it really does anything put a vacuum gauge on your intake. "if" it were to make a difference you should have slightly less vacuum. Vacuum is caused by restriction and porting the TB does not make it any less restrictive or change the airflow characteristics in a NA engine, so the vacuum will not change. Your not gaining a thing. Unless your just doing it to shave some weight off??
Porting your TB will do the exact same thing as putting a bigger exhaust tip on your car.
It doesnt make any difference at all.....none. Dont believe everything you read in a magazine.
If you want to find out if it really does anything put a vacuum gauge on your intake. "if" it were to make a difference you should have slightly less vacuum. Vacuum is caused by restriction and porting the TB does not make it any less restrictive or change the airflow characteristics in a NA engine, so the vacuum will not change. Your not gaining a thing. Unless your just doing it to shave some weight off??
Porting your TB will do the exact same thing as putting a bigger exhaust tip on your car.
Make a claculation and you will find out that on a stock engine the 3 valve section equivalent is much smaller than your throttle.
Therefore the speed of the air going through the throttle is slow.
The loss of pressure is insignificant and in fact the tuner see 1 to 2 HP gain on a stock engine.
Now if you changhe cam duration, increase the valve lift, go for bigger valves, have after marker heads with much higher flow then your throttle begin to be a restriction and then the loss of pressure is not anymore insignifcant.
Stock head are worth 220 ACFM while good after market on 350CI can be at 330 ACFM
Then you will see 10HP gain with a ported throttle vs a stock one
Last edited by corvettefrance; May 13, 2007 at 01:19 PM.
Racer
Joined: Nov 2006
Posts: 380
Likes: 1
From: Janesville Wisconsin
A few people have said the example is not correct, please show me a correct example. real life...no calculations.
Former Vendor
Joined: Mar 2004
Posts: 1,518
Likes: 7
From: Valencia CA
A properly ported stock TB (including epoxy in that large void area) will increase the CFM by over 100 without increasing the size of the blade (higher airspeed due to the much better shape). A stock TB flows around 750 CFM....a good ported one can approach 900 CFM. While its only worth about 4-5 peak HP, the SOTP feels like four times that amount.....ask anyone who's done the swap.
IMO its one of the best mods considering the dollars spent....and dont kid yourself....all of those extra 5 ponies add up. By the time you say this isnt worth much and that isnt worth much you lost out on another 15-20 HP by not paying attention to the smaller details. When you lose to your buddy by a car length you would be wishing you did....
Like anything else, "is it worth it" is all a matter of opinion and how committed you are to getting as much out of your particular combination.
Go for it would be my advice....
Tony
IMO its one of the best mods considering the dollars spent....and dont kid yourself....all of those extra 5 ponies add up. By the time you say this isnt worth much and that isnt worth much you lost out on another 15-20 HP by not paying attention to the smaller details. When you lose to your buddy by a car length you would be wishing you did....
Like anything else, "is it worth it" is all a matter of opinion and how committed you are to getting as much out of your particular combination.
Go for it would be my advice....
Tony
Last edited by Tony Mamo @ AFR; May 13, 2007 at 02:26 PM.
Thread Starter
Pro
Joined: May 2004
Posts: 551
Likes: 19
From: Morgantown WV
Tony,
If you're smart enough to design the cylinder heads on my car then I guess you're smart enough to advise me on a simple mod like this.
Thanks for the advise. I'll go satisfy my urge to spend more money on my engine.
If you're smart enough to design the cylinder heads on my car then I guess you're smart enough to advise me on a simple mod like this.
Thanks for the advise. I'll go satisfy my urge to spend more money on my engine.
Racer
Joined: Oct 2003
Posts: 389
Likes: 1
From: Denver co
make a diagram with the rotation and duration and you will see that some intake can be in the process to open or close.
This is why I took one in fact it is 2 that are not fully open
Melting Slicks
Joined: Jan 2007
Posts: 3,103
Likes: 7
From: Sandy Ego Ca.
NOT
I ported my Camaro TB and saw a real throttle response improvement and low end performance increase..I also saw a lowering of my MPG fuel usage....
True you not going to get a buttload of HP gain..but you will get some...Ill let the experts and the dyno graphs argue about how much..
Too many people discount the SOTP dyno..the problem with SOTP measurments is that its not "quantifible" so people write it off as non existant..But every road racer out there will tell you its a measurment not to be ignored...Ive ridden motorcycles and flown HP planes..and the one thing I trust more than anything is my SOTP evaluation...
I ported my Camaro TB and saw a real throttle response improvement and low end performance increase..I also saw a lowering of my MPG fuel usage....
True you not going to get a buttload of HP gain..but you will get some...Ill let the experts and the dyno graphs argue about how much..
Too many people discount the SOTP dyno..the problem with SOTP measurments is that its not "quantifible" so people write it off as non existant..But every road racer out there will tell you its a measurment not to be ignored...Ive ridden motorcycles and flown HP planes..and the one thing I trust more than anything is my SOTP evaluation...
Melting Slicks
Joined: Jan 2007
Posts: 3,103
Likes: 7
From: Sandy Ego Ca.
NOT
I ported my Camaro TB and saw a real throttle response improvement and low end performance increase..I also saw a lowering of my MPG fuel usage....
True you not going to get a buttload of HP gain..but you will get some...Ill let the experts and the dyno graphs argue about how much..
Too many people discount the SOTP dyno..the problem with SOTP measurments is that its not "quantifible" so people write it off as non existant..But every road racer out there will tell you its a measurment not to be ignored...Ive ridden motorcycles and flown HP planes..and the one thing I trust more than anything is my SOTP evaluation...
I ported my Camaro TB and saw a real throttle response improvement and low end performance increase..I also saw a lowering of my MPG fuel usage....
True you not going to get a buttload of HP gain..but you will get some...Ill let the experts and the dyno graphs argue about how much..
Too many people discount the SOTP dyno..the problem with SOTP measurments is that its not "quantifible" so people write it off as non existant..But every road racer out there will tell you its a measurment not to be ignored...Ive ridden motorcycles and flown HP planes..and the one thing I trust more than anything is my SOTP evaluation...
Racer
Joined: Oct 2003
Posts: 389
Likes: 1
From: Denver co
A properly ported stock TB (including epoxy in that large void area) will increase the CFM by over 100 without increasing the size of the blade (higher airspeed due to the much better shape). A stock TB flows around 750 CFM....a good ported one can approach 900 CFM. While its only worth about 4-5 peak HP, the SOTP feels like four times that amount.....ask anyone who's done the swap.
IMO its one of the best mods considering the dollars spent....and dont kid yourself....all of those extra 5 ponies add up. By the time you say this isnt worth much and that isnt worth much you lost out on another 15-20 HP by not paying attention to the smaller details. When you lose to your buddy by a car length you would be wishing you did....
Like anything else, "is it worth it" is all a matter of opinion and how committed you are to getting as much out of your particular combination.
Go for it would be my advice....
Tony
IMO its one of the best mods considering the dollars spent....and dont kid yourself....all of those extra 5 ponies add up. By the time you say this isnt worth much and that isnt worth much you lost out on another 15-20 HP by not paying attention to the smaller details. When you lose to your buddy by a car length you would be wishing you did....
Like anything else, "is it worth it" is all a matter of opinion and how committed you are to getting as much out of your particular combination.
Go for it would be my advice....
Tony
But stock heads having 230*2= need 460CFM plus the two that can be partially open depending onthe duration et say you need 200 CFM
this mean you need 660 CFM and your throttle can give you 750 you have nearly 20% less speed in your throttle than in your heads.
Melting Slicks
Joined: May 2005
Posts: 3,394
Likes: 12
From: Leon Iowa
St. Jude Donor '06-'07-'08-'09
A properly ported stock TB (including epoxy in that large void area) will increase the CFM by over 100 without increasing the size of the blade (higher airspeed due to the much better shape). A stock TB flows around 750 CFM....a good ported one can approach 900 CFM. While its only worth about 4-5 peak HP, the SOTP feels like four times that amount.....ask anyone who's done the swap.
IMO its one of the best mods considering the dollars spent....and dont kid yourself....all of those extra 5 ponies add up. By the time you say this isnt worth much and that isnt worth much you lost out on another 15-20 HP by not paying attention to the smaller details. When you lose to your buddy by a car length you would be wishing you did....
Like anything else, "is it worth it" is all a matter of opinion and how committed you are to getting as much out of your particular combination.
Go for it would be my advice....
Tony
IMO its one of the best mods considering the dollars spent....and dont kid yourself....all of those extra 5 ponies add up. By the time you say this isnt worth much and that isnt worth much you lost out on another 15-20 HP by not paying attention to the smaller details. When you lose to your buddy by a car length you would be wishing you did....
Like anything else, "is it worth it" is all a matter of opinion and how committed you are to getting as much out of your particular combination.
Go for it would be my advice....
Tony
