New Throttle body is it worth the money?

[Dipstik-sportech]

Originally Posted by D_Thissen

IIRC someone had there car dyno'd with the bigger tb and picked up around 10-12whp on the top end. They also were boosted (C38 blower I think) with header, full exhaust running e70. 320whp seems to stick out in my head.

No

[Captain Snooze]

Originally Posted by justinh77

and it apparently gives just below a 50% increase of airflow.

This is marketing at its finest. Sure, the throttle body maybe able flow more air but it doesn't mean the engine will be able to make use of the increase. As others have said the throttle body is not the limiting factor here (or over there).

[86SPEED]

We did a Dyno Testing for the Grams TB on a supercharged FR-S and a couple N/A's

And we can confirm that YES it did actually make some power. For the price YES, it is worth it.

before install the car made 303HP 238ft-lb TQ
after install the car made 307HP 238ft-lb TQ
after install with a tune up the car made 314-315 HP and 248ft-lb TQ

^High Boost Pulley @ 11psi and e70

I would hope no one expects 10HP gains for $100 they spend (but then again this is 2016 now) However, at $400 bucks (cheaper from us if you ask nicely ) this throttle body will benefit the boosted demographic. We are also thinking about adding it to our Black Friday sale for extra savings!


On a Turbo FR-S we were not able to compare with/without the TB, due to time restrictions on the dyno. However, he did state that he was able to spool faster (take that and do with it what you want). He got about 320 on the dyno w/the TB on the small Greddy Turbo at 10psi.

Another "cool factor" to it is the BOV got louder..as expected. but thats just a cool factor.

Here is our write up on this
http://blog.86speed.com/tested-and-p...throttle-body/

Stay Tuned as I will be doing another write up for the N/A population soon once that customer brings his dyno sheets in!

[86SPEED]

Anyone want to test and dyno this on an N/A application.

PM us your mods list

[Cartman]

Originally Posted by 86SPEED

Anyone want to test and dyno this on an N/A application.

PM us your mods list

I would be willing to test it, but I haven't bought this waiting to see N/A results to be honest, as spending 350+ for unknown gains (or loses) N/A isn't really appealing.

[MJones_RB]

So if I install the Grams TB, plus the Crawford Power Blocks, PLUS one of those Vortex TURBONATORs, I should see HUGE gains, right?

[Jeff Gray]

Originally Posted by 86SPEED

Anyone want to test and dyno this on an N/A application.

PM us your mods list

I'd be willing to dyno mine with the Grams 72mm Throttle Body. I have a tune with a injen intake and HKS EL headers. I have a HKS front pipe and a greddy exhaust. I'm on e85 as well. Here soon I'll be doing the HKS cams and stroker kit. This car is going to be staying NA. I find it a fun challenge to get power out of this car in its NA form.

[Traktor]

Originally Posted by Jeff Gray

I'd be willing to dyno mine with the Grams 72mm Throttle Body. I have a tune with a injen intake and HKS EL headers. I have a HKS front pipe and a greddy exhaust. I'm on e85 as well. Here soon I'll be doing the HKS cams and stroker kit. This car is going to be staying NA. I find it a fun challenge to get power out of this car in its NA form.

Perhaps consider this:
https://moneyshiftracing.com/store/i...roker-kit.html
I think this was put together by Celek (NA fanatic on this forum), and he was going to use high lift piper cams with valve relief for the pistons?


Sent from my iPhone using Tapatalk

[86SPEED]

Updates ?

[FunnyGopher]

@86SPEED I recently purchased the Skunk2 Powerbox and the Grams Throttle Body, and had it dyno'd! Sadly, I had it dyno'd after the throttle body was on, so I don't have a baseline before the dyno.

But here's the dyno chart anyway!


Without a tune, the powerband just died at 6k. The other guy I was with, who only had a K&N drop in, made 170 whp on the same dyno. With the charts overlaid, I had him by ~5 whp throughout the entire band, until 6k. His power kept going, and mine just sunk. I imagine with a tune, this thing would rock.

The overlaid chart shows the throttle body kicking in the torque WAY earlier than anybody else though, which helps with the throttle response feeling.

[nikitopo]

It looks that you need a tune. You 're using also a non-stock intake airbox and you might need to adjust also the MAF readings.

[FunnyGopher]

Originally Posted by nikitopo

It looks that you need a tune. You 're using also a non-stock intake airbox and you might need to adjust also the MAF readings.

Yeah. We were comparing all of our charts in the end, and it was obvious I needed one. I have an ACE header, FP, and catback showing up tomorrow, so I'll end up getting a tune within the next couple weeks from a local tuner.

[nikitopo]

Originally Posted by FunnyGopher

Yeah. We were comparing all of our charts in the end, and it was obvious I needed one. I have an ACE header, FP, and catback showing up tomorrow, so I'll end up getting a tune within the next couple weeks from a local tuner.

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.

[FunnyGopher]

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.

Thanks for the insight! Our local tuner is pretty experienced, and has actually tuned the exact throttle body before on another club member's vehicle. However, that member's 86 is twin turbo'd, so it might be a little different on an NA application. He's always up for a challenge though! I'll make a post about it once it happens.