New Throttle body is it worth the money?

[Teseo]

Originally Posted by nikitopo

Just to let you know, it won't be easy to tune the larger throttle body. If the tuner is experienced, then I guess he'll know what to do.

I had the same issue like you with another throttle body brand and the Stage 1 OFT tune. At that time I had just a drop-in air filter and the bigger throttle body. The car was breathless after 6k. The strange thing was that I didn't have this issue with the factory tune. I did a check by testing the two tunes in same road, same day, same conditions. So, it looks that some tunes are more sensitive with this change than others. I guess, it depends also how much you go larger. Currently, I am using a (canned) tune from another shop and I don't have this issue.

Maybe the trottle body moved the power band, like crawford intake spacers? Without dyno is hard to say, thanks for your report

[Drakiv]

I would love to see what kind of gains my car would have with one of these........Was thinking of getting the FBM intake runners AND the TB.

[Kodename47]

Here's a post from the UK Forum:

Originally Posted by James@Amber Performance

Yes we did this.* AT Power got in contact with us, and asked us to start selling their throttle bodies they have developed for the GT86. Never ones to believe anyone else's data, we took one for test ourselves. They have been claiming 10+hp on std unmapped car (via Litchfield)
We did :
- 3 Power runs on OE Throttle body
- Fit new Throttle
- Recalibrate Throttle pedal
- 3 Power runs on AT Throttle body

Result* - The kit looks great, but after all tests on our NA car, we actually lost power. Possibly there will be gains on a forced induction car, but certainly not on an NA car.

[Dru670]

http://blog.86speed.com/tested-and-p...throttle-body/

[nikitopo]

Originally Posted by Dru670

http://blog.86speed.com/tested-and-p...throttle-body/

This is an old post and the dyno was done using a car with turbo. The dyno kodename posted above is related to a NA car. Keep in mind that the Grams tb doesn't have a tapered entrance and the amount of air in high RPMs is smaller. So, the small loss in power makes sense. The oem tb is tapered: