Bo's Ported Throttle body

[Fish-man]

Originally Posted by BFASTNOTLAST

I did my own shaft mod to my V-Max, and yes it made a big improvement. So much so, I have been driving Rhino nut's dialing in the tune. Maybe it's more sensitive with my cam / bolt on set up but it for sure needed to be re-tuned. I'm shocked that no else has reported needing a tune adjustment. I will do an A/B comparison when I get on the dyno soon.

Cool. Got a write up/ DIY? Would like to see how you did it.

[axis]

Originally Posted by DroptopZ

I apologize as I'm relatively new to reading dyno graphs, but the thin line is the new dyno? If so, it appears there is a gain in peak horsepower and torque with a small reduction at low RPM. I noticed everyone states this is a 'throttle response' mod, so I figured it would be the opposite.

Also, if I'm understanding, the colder weather for the first dyno would benefit your dyno numbers because the air is cooler and less dense--correct? So what you're saying is that the gains, hypothetically, might be slightly more than what is showing?

Sorry for the newb questions--I know how to read a single line dyno graph but still have difficulty sometimes with the graphs that have multiple lines.

You are correct on the heat issue. I show both graphs laid over eachother so people can compare throughout the graph. It's better to see a whole graph cause peak gains don't always tell the whole story. As I stated above, you can see HP rise above the previous pull in the upper RPM's since that's where the stock TB becomes a restriction. The heat is what we assume caused the slight low end loss.

Originally Posted by BFASTNOTLAST

I did my own shaft mod to my V-Max, and yes it made a big improvement. So much so, I have been driving Rhino nut's dialing in the tune. Maybe it's more sensitive with my cam / bolt on set up but it for sure needed to be re-tuned. I'm shocked that no else has reported needing a tune adjustment. I will do an A/B comparison when I get on the dyno soon.

I don't have the AFR for the first run but the second one with Bo's TB shows 12.68 from 5800-6400. That may increase with colder air but I wouldn't think it would to the point of needing to add fuel. Seeing that this is a mod that grows with you, along with Ryans modded IM's, I could see it needing a retune with a H/C package.

[axis]

Originally Posted by blackedOUTSS610

I have the CNC ported TB on mine .... big advantage with this one? Would I notice a big difference if I took mine out and installed this one?

Originally Posted by axis

Haven't seen a dyno graph of the Vmaxx so I can't speculate. Most say it's a throttle response mod and that I totally agree with since Bo's are ported as well. Vmaxx is spiral ported, but don't know how much, if any, difference that makes. Bo is now offering to do his shaft mod to Vmaxx TB's as well, if you're interested. At this moment, it's a send in item only since they don't have a stash of Vmaxx TB's to mod. You can check with Jason (Jacfab) to see how long it would take.

This.

[tw78911sc]

Old school Porsche guys would also knife edge the throttle blade as well, button head screws etc... it all adds up.

[axis]

Originally Posted by tw78911sc

Old school Porsche guys would also knife edge the throttle blade as well, button head screws etc... it all adds up.

I thought about that as well. Might see if Bo can set me up with a all out modded one. I think Bo may need to hire a helper, lol.

[axis]

Originally Posted by BFASTNOTLAST

I did my own shaft mod to my V-Max, and yes it made a big improvement. So much so, I have been driving Rhino nut's dialing in the tune. Maybe it's more sensitive with my cam / bolt on set up but it for sure needed to be re-tuned. I'm shocked that no else has reported needing a tune adjustment. I will do an A/B comparison when I get on the dyno soon.

You thinned the back of the shaft as well. Wow, that's cutting it close, lol. Not sure i'd want to trust it on that though. DEFINITELY not on a FI car.

[riki3fan]

Originally Posted by rich3fan

In do a double take every time I see your username. Earnhardt fan?

And I agree. I've got some mods and a tune (bubye AFM ) now so I'm very happy with this PTB.

Yep, always been an Earnhardt fan! I do the same when I see yours. And Riki is my nickname.

I've got the Range device for the AFM for now until I tune it out when I decide which header and exhaust setup I want. Hoping to hear some good ones in Sturgis this weekend.

A HUGE thank you to Jason for getting this TB to me in time for this trip. It got to my place just in time and I have been thoroughly enjoying it ever since! Thank you once again! I've got the core boxed up and ready to return as soon as I find a UPS drop-off point somewhere in Sturgis.

[Blueforce]

Originally Posted by DroptopZ

I apologize as I'm relatively new to reading dyno graphs, but the thin line is the new dyno? If so, it appears there is a gain in peak horsepower and torque with a small reduction at low RPM. I noticed everyone states this is a 'throttle response' mod, so I figured it would be the opposite.

Also, if I'm understanding, the colder weather for the first dyno would benefit your dyno numbers because the air is cooler and less dense--correct? So what you're saying is that the gains, hypothetically, might be slightly more than what is showing?

Sorry for the newb questions--I know how to read a single line dyno graph but still have difficulty sometimes with the graphs that have multiple lines.

The blue line would be the new dyno, showing the gain. Slight improvement in power and more importantly torque but it wouldn't be noticeable.

Also, the cool air is actually more dense, allowing for more oxygen molecules to enter your system thus increasing power. The cooler it is the closer the molecules are. With hotter things the molecules are more excited and are bouncing around colliding more and more spread out because of these collisions. Cold air is heavier than warm air.

[BFASTNOTLAST]

Originally Posted by axis

You thinned the back of the shaft as well. Wow, that's cutting it close, lol. Not sure i'd want to trust it on that though. DEFINITELY not on a FI car.

I'm comfortable with it, It's a stainless shaft and pretty strong I may add. I tried to bend an old shaft and it was damn near impossible without a press. In my case the airflow tables were the most sensitive to the change, not so much adding fuel at wot.

I'm sure all are just a bit different in the end.

[BFASTNOTLAST]

Originally Posted by tw78911sc

Old school Porsche guys would also knife edge the throttle blade as well, button head screws etc... it all adds up.

I use to do all this as well with my 4th gen cars and it worked good. However I tried a blade about 2 year's or so ago and had no luck but that was before I was tuned. I have a couple extra blades laying around, I will massage on this weekend and see what we got. Another note I could not find that small of a button head bolt at the hardware store I got these at otherwise I would have. I'm sure McMaster Carr has them but I didn't want to wait.

[rich3fan]

Originally Posted by riki3fan

Yep, always been an Earnhardt fan! I do the same when I see yours. And Riki is my nickname.

I've got the Range device for the AFM for now until I tune it out when I decide which header and exhaust setup I want. Hoping to hear some good ones in Sturgis this weekend.

A HUGE thank you to Jason for getting this TB to me in time for this trip. It got to my place just in time and I have been thoroughly enjoying it ever since! Thank you once again! I've got the core boxed up and ready to return as soon as I find a UPS drop-off point somewhere in Sturgis.

Have fun at Sturgis! I'm extremely jealous! I mentioned in my JacFab review that 5 minutes after I got off the phone with Jason with my credit card info, I got a shipment confirmation notice in my Inbox. Very impressive. And like I mentioned to Bo, I can roast the tires effortlessly with his TB now.

[camarosspower]

Hey guys. Excuse me if this is a stupid question but how can compare tb's on a dyno if I keep on hearing that the computer has to learn the AFR? Or is this not true?

[djpelosi]

Originally Posted by camarosspower

Hey guys. Excuse me if this is a stupid question but how can compare tb's on a dyno if I keep on hearing that the computer has to learn the AFR? Or is this not true?

Dyno it AFTER the computer learns the AFR and compare to the previous dyno run on the stock TB?

[axis]

Originally Posted by camarosspower

Hey guys. Excuse me if this is a stupid question but how can compare tb's on a dyno if I keep on hearing that the computer has to learn the AFR? Or is this not true?

Originally Posted by djpelosi

Dyno it AFTER the computer learns the AFR and compare to the previous dyno run on the stock TB?

This.

It learns pretty fast. With this TB mod, you're adding metered air to the system, so it's just a microsecond calculation to fuel the extra air. The question that everyone wanted to know was, how much air was added with the shaft mod. Given that cold air is MUCH more dense than hot air and we gained enough airflow to make 7whp more in 50 degree hotter air, I would say this mod gains quite a bit of airflow over the stock TB. Even if it does adjust the AFR a little, it will be adding fuel since you're physically adding more air. Either way, you're still moving a lot more air. More air means more HP.

If you're referring to my dyno graph, Bo's TB has been on my car since the first day of Camaro fest.