Nick Williams 103mm Throttle Body scalar

[Poppacapp]

Ordered a 103mm NW throttle body for my Bolton Grand Sport with MSD manifold. Does someone have the TB scalar info needed to change in the tune available?

Thanks in advance!

[smg]

I'd be interested in this as well. Brett from Pray said this was the correct number: 6,243.50, but I'd like to know more about the calculation used. I tired to add what assumed was correct going from a 90 to the 103 so adding 13% to the stock number and it was a good deal less than the number above.

[TriPinTaZ]

I'd be interested in this as well. Brett from Pray said this was the correct number: 6,243.50, but I'd like to know more about the calculation used. I tired to add what assumed was correct going from a 90 to the 103 so adding 13% to the stock number and it was a good deal less than the number above.

That is because a 13% larger hole does not equal only 13% more airflow.

[smg]

I'd assume that plays a part, so who has the method used to calculate the number? I'm more interested in understanding it than to simply get a number thrown at me. In HPT it simply asks for "max area" so i'd assume its doing the calculations for flow based off the surface area.

[TriPinTaZ]

I'd assume that plays a part, so who has the method used to calculate the number? I'm more interested in understanding it than to simply get a number thrown at me. In HPT it simply asks for "max area" so i'd assume its doing the calculations for flow based off the surface area.

It is, but it is in mm squared. You have to account for the throttle blade bar as well which subtracts from the total mm2 equation. This is why simply doing 87mm squared does not equal the value in the ECU and 102mm squared would be incorrect as well.

If you take 87mm squared, then subtract the value in the OEM tune this might be the throttle bars mass area. So then take 102mm squared and subtract the throttle bars mass area. Is the value close to what Pray says it should be?

[TCSS07]

I tuned a 4 gen vette with the fast 102mm tb/intake and settled on 7800 for the scaler ... had a large cam also though

[smg]

we're a variation of the vvt2 and a d1x pushing ~20psi e85/meth etc...

[Lakegoat]

I have my 102 set at 7,200.0000. A friend of mine has his set at 8,000.0000., ---same engine, mine is TVS, his is N/A. Mine did not run good at idle at 8,000. Idles perfect at 7,200.

[paulsmithsr]

Use ZR1 throttle body 95mm and it works perfect same plug. As stock - I have adapter plates for it - idles perfect. No problems like 102 has
Call or text 281-450-1498. Paul

[8850]

Is this you? http://www.ictbillet.com/gen-5-lt1-l...ng-rotate.html

How much is the 95mm throttle body?

[Redline MS]

According to my conversation with Nick Williams last week; he claims the effective throttle area does not need to be changed on the LT1....I questioned this and he stated that the new TB flows that same for the first 13-16% of the stock TB. This of course is the critical area for ETC control. Once past this point the airflow just increases and its transitioned from idle to part throttle airflow. To me the thought of changing this area and not making he proper change seems odd but Nick did add an interesting twist to it....seems to be working. However if you come from a 5.3 liter motor its best to at least match the ETA to the 6.2 liter.....

[TriPinTaZ]

According to my conversation with Nick Williams last week; he claims the effective throttle area does not need to be changed on the LT1....I questioned this and he stated that the new TB flows that same for the first 13-16% of the stock TB. This of course is the critical area for ETC control. Once past this point the airflow just increases and its transitioned from idle to part throttle airflow. To me the thought of changing this area and not making he proper change seems odd but Nick did add an interesting twist to it....seems to be working. However if you come from a 5.3 liter motor its best to at least match the ETA to the 6.2 liter.....

Do you think the MAF will need to be re-scaled overall? Wouldn't the larger TB opening slow down the velocity of incoming air and cause the MAF to read slightly lower? This could throw off the airmass torque calculations. I haven't had my hands on one yet so I don't know myself.

[Redline MS]

Do you think the MAF will need to be re-scaled overall? Wouldn't the larger TB opening slow down the velocity of incoming air and cause the MAF to read slightly lower? This could throw off the airmass torque calculations. I haven't had my hands on one yet so I don't know myself.

Your MAF calibration is solved independently of anything post MAF. If you MAF curve is correct more airflow just moves up the curve. This is then tied to torque calculations If the new TB truly moves the same air as the factory one at the lower throttle angles you shouldn't have to do anything.

[Poppacapp]

Interesting responses! Much appreciated. I will see how the 103 does with stock area calc and go from there. I had considered the 95mm tb but do not want to have to modify it to work with my MSD. I prefer the fit finish the 103 will provide(order the Black coated unit). Should be good for an additional 7-10rwhp from what I have seen.

[jarrah]

guys you really have to test on some operating systems no matter what you do on the area set it to 8000 or 3000 it doesn't make any difference, there is a table I contacted hptuners similar to what you see in fords area vs tps position and many other idle tables and throttle tables however they asked me for the table ids which I don't have access too

[jarrah]

KeETQC_Cf_ HighPresRatioClamp

KtETQC_m_AllCylAPC_ Low

KtETQC_m_AllCylAPC_


KeETQC_r_ MaxUseablePresRatio

ETQC_m_AllCylAPC_ High

Driver Requested Area w/o Idle (VeTPSC_Pct_DrvrReqArea_wo_Idle)

Throttle Area (VeTPSC_pct_ThrotArea_wIdle)  Throttle Area with LAVA (VeTPSC_pct_ThrotAreaInd_wIdlLrn)  Throttle Position (VeTPSC_pct_Throt_Pstn_Ind)

[Vicster]

I know this is an old thread, but thought I would put the formula on it.

To find the area of the new throttle body.
Using formula (pi x r x r)-(shaft length x shaft thickness)= throttle body area.
87mm: (pi x 43.5 x 43.5)-(87 x 10)= 5,074.6786987553
90mm: (pi x 45 x 45)-(90 x 10)= 5,461.74
102mm: (pi x 51 x 51)-(102 x 10)= 7,151.282491987
112mm: (pi x 56 x 56)-(112 x 10)= 8,731.744
pi= 3.14159265359


I find that the area calculated this way is a little high but very close. If you want you can perform one more step to be more precise.
To find the ratio of the two areas. Use (102mm Area / 87mm Area)=Ratio
Ratio: (7,151.282491987 / 5,074.6786987553)= 1.4092089207

Then take stock calibration value and multiply by ratio. Using (Stock Value x Ratio)
ETC Area Scalar: (5,060 x 1.4092089207)= 7,130.5971387567

[Simplyjesse]

Thanks for that. That's all I needed 🙏