[E.D.]

OK, it was time for another update…I changed the following:

- All prices have been updated.

- The VF Stage II has been included.

- The VF Stage III (formerly the stage II) has been included in the table only without pricing. The Stage III has not been included in the graphs, again because pricing is unknown.

- The final price for the BOE TVS SC-kit has been included: $6,500 including wideband A/F meter and EFI ECU. Pls note that these two hardware components are NOT included in any of the other kits, so basically we now have two situations:
1. If you don’t care about having an EFI and/or A/F meter then the graphs will still work perfectly for you since the added value, when compared to the other kits, of these two components is zero for you.
2. If you do care about having these two items, than just looking at the graphs will not give you the full picture anymore because we’re comparing apples with oranges because the BOE TVS SC includes more hardware which you care about. Easiest would be to put a $-number what the EFI&A/F meter is worth to you and then deduct that from the cost of the BOE TVS SC kit to make it more comparable to the other kits again. Obviously you’ll need to download the spreadsheet to do this, the spreadsheet is included in post #2.
To illustrate what I mean: let’s assume that you the EFI&A&F is worth $1,000 to you, then deduct this $1,00 from the $6,500 cost of the kit = $5,500. Basically you’re saying then you are paying $5,500 for the kit when it would be similar to the other kits and on top of that $1,000 extra for the A/F meter and the ability to tune the EFI yourself. Note: in the example above of a $1,000 value, the BOE kit would take the lead over the VF kits re paid $ per WHP & ft-lbs.

- Until it is announced, the BOE TVS SC-kit with flash tune is NOT included in the table since both pricing and WHP and ft-lbs numbers are unknown. It appears reasonable to expect that this final flash tune will be less powerful than the EFi tune because of a higher built in safety margin.

- Based on a thoughtful comment of Lordz, I split the pricing column into two separate two columns:
1. Pricing including labor and
2. Pricing excluding labor for the pro mechanics. Please note that all the graphs are still based on the pricing including labour.
Check the spreadsheet attached in post #2 of this thread if you want to see the same type of graphs but then based on the pricing excluding labour. I didn't put these graphs in the thread (yet) to avoid confusion.

- I took out the '08 factory SC solution out of the 'costs per extra WHP / ft-lbs'-graphs since these '08 factory SC costs per extra WHP and ft-lbs are way higher than the aftermarket solutions and that made the graphs harder to read.

- In the prior version of the table I overlooked that for the more powerful kits it can be reasonably expected that a stronger clutch and higher capacity fuel pump will be required, in fact the fuel pump is already included in both the VF Stage II and BOE TVS SC kit. So the cost of an upgraded clutch is now added to the costs for the kits mentioned in the sentence before. This will impact the best-bang-for-the-buck evaluation quite a bit because, although the costs for a clutch and/or fuel pump aren’t that high, the installation costs for these two items are quite significant.


Besides the changes as mentioned above, one last remark about how I came up with the WHP/ft-lbs numbers for the VF stage II and stage III. For both stages no dynojet graphs are available yet, only graphs for the dyno VF typically uses which reads higher than a dynojet. To estimate the dynojet numbers for stage II and III, I did the following:

For VF stage I there are dynojet graphs available. Using these I did the following for both WHP and ft-lbs:
(VF stage II (or III) their own VF dyno / VF stage I their own VF dyno) * dynojet VF stage I. When dynojet graphs become available, I’ll use these instead the estimates I now need to use.

See the first post in the thread for updated conclusions.