80mm Throttle Body for the LFX

[willoverkill]

Originally Posted by Kenny Camaro

Derek, has Will done any tuning with the mace cams in a N/A application with the 80 and E-85?

I haven't tuned any MACE cams in an N/A setting, forced induction only, and in those they work very well.

My new-to-me vehicle has a 3L that's basically a debored 3.6, and it uses LLT cams, and I just happen to have a set of LLT MACE cams so anticipate I'll put them in sometime this summer and get the tuning down for N/A (and then boost it)!

[Kenny Camaro]

Thanks Will, was considering the Mace cams in a N/A set up. Any info would be appreciated.. I know there was not much success prior. Was wondering had you takien a swing at it. Good luck and let us know if you do . Thanks for the reply.

[tredye]

Originally Posted by sixtyseven

I'm trying to figure this out. Does the supplied spacer plate accomplish this?

"The clamping area is 3.5" versus the 3" area of the stock throttle body, so you may need a new coupling for your intake, or some massaging required."

N/M
I figured it out. The coupling of the intake hose to TB. 3.5"- 3"

Here my LFX emblem

[gringo]

Originally Posted by willoverkill

I haven't tuned any MACE cams in an N/A setting, forced induction only, and in those they work very well.

My new-to-me vehicle has a 3L that's basically a debored 3.6, and it uses LLT cams, and I just happen to have a set of LLT MACE cams so anticipate I'll put them in sometime this summer and get the tuning down for N/A (and then boost it)!

Any progress on the hard coded WOT restriction until 4k+ rpms on these platforms?

[Kenny Camaro]

Coming soon. A ported version of the Overkill 80 MM Throttlebody!! Yes ,word through the grapevine has it that Will shall soon be offering a ported version of Overkill Throttlebody on the Overkill website!! Get in touch with Will and let him know that you are interested!!

[Kenny Camaro]

The ported Overkill 80mm Throttlebody is becoming a reality. Get in touch with Will for further information!!

[gringo]

Any progress on the hardcoded "WOT restriction" on our engines?

[blackswan]

Interested!

[Kenny Camaro]

Originally Posted by blackswan

Interested!

In the 80 or the ported 80? Either way , contact William Rishworth of Overkill Motorsports!! Will is the man!!

[Gossamer]

so i read thru the 630 posts. Only 3 dyno results and one was from an Impala.

Last year I added the Vmax ported TB, Jacfab spacer, Jacfab ported intake, CAI brand cold air and MRT v2 axle back.

I have an autocal sitting and waiting for nicer weather to try out.

I'm trying to decide if the 80mm throttle assembly is a worthwhile upgrade to what I've already done but cant seem to find any real results on this upgrade over a stock or even one near my existing mods. Not that it's overly expensive and I can sell my vmax easy enough. Just need to make sure it's a worthwhile investment.

[Jazzzed]

Originally Posted by Gossamer

so i read thru the 630 posts. Only 3 dyno results and one was from an Impala.

Last year I added the Vmax ported TB, Jacfab spacer, Jacfab ported intake, CAI brand cold air and MRT v2 axle back.

I have an autocal sitting and waiting for nicer weather to try out.

I'm trying to decide if the 80mm throttle assembly is a worthwhile upgrade to what I've already done but cant seem to find any real results on this upgrade over a stock or even one near my existing mods. Not that it's overly expensive and I can sell my vmax easy enough. Just need to make sure it's a worthwhile investment.

I went from the stock TB to the 80mm. There was a small improvement in throttle response at the very instance of the throttle plate opening. A bigger plate allows a little more air through on that initial opening. There is also more overall power when you get on it and have the throttle plate open a decent amount. More air = more power. Those were both noticeable improvements right off the bat. The stock TB will start to bog down a bit at WOT compared to the 80mm which will continue to add power in the higher rpms. But the downside is that the low-mid range of the rpm band suffers with the 80mm compared to the stock TB imo. If you have a daily driver, I think the 72mm gives you better torque down low for zipping around town, and accelerating through turns etc. So each flavor of TB has it's advantages and disadvantages. If you have Kenny hand-port your 80mm, it will enhance both of the positive characteristics I have described. I'm not sure it did much for the low mids. I currently use a VTC to smooth out the rpm band with my 80mm. That works pretty well, but I also have to have the VTC set pretty high to do that. I have an automatic too, so that doesn't help.


These are just my opinions based on butt dyno analysis only.

[Gossamer]

Originally Posted by Jazzzed

I went from the stock TB to the 80mm. There was a small improvement in throttle response at the very instance of the throttle plate opening. A bigger plate allows a little more air through on that initial opening. There is also more overall power when you get on it and have the throttle plate open a decent amount. More air = more power. Those were both noticeable improvements right off the bat. The stock TB will start to bog down a bit at WOT compared to the 80mm which will continue to add power in the higher rpms. But the downside is that the low-mid range of the rpm band suffers with the 80mm compared to the stock TB imo. If you have a daily driver, I think the 72mm gives you better torque down low for zipping around town, and accelerating through turns etc. So each flavor of TB has it's advantages and disadvantages. If you have Kenny hand-port your 80mm, it will enhance both of the positive characteristics I have described. I'm not sure it did much for the low mids. I currently use a VTC to smooth out the rpm band with my 80mm. That works pretty well, but I also have to have the VTC set pretty high to do that. I have an automatic too, so that doesn't help.


These are just my opinions based on butt dyno analysis only.

thanks for the reply, so it seems that it's not enough of an upgrade over my 72mm ported throttle to justify the costs.

[DSX_Camaro]

I dunno. I went from a ported 72 to the 80mm and it definitely moves more air but it isn't something you can really compare peak numbers about. A bigger TB will allow more air to move so more power can be made, but if you aren't going to go boost, the gains are debatable. I also had every bolt on possible when I swapped TB and have had a few tune revisions so I have stout linear power at all points PLUS 3.45 gears.

Less about power, more about power potential. Kinda like stock 72 vs ported 72. It probably won't show peak gains so most people will write it off.

[Jazzzed]

Yeah, when you're talking about whether the cost incurred is worth it, its very subjective so its hard to say. One thing I noticed after I posted is that Gossamer has a convertible. One thing I would say is to not underestimate the high pitch whistle described in this thread. It is very irritating, and I can't imagine dealing with that with your vert top down. In order to get rid of it, you have to open up the inlet of your manifold to match the 80mm diameter of the TB. The whistle is cause by high velocity air being reflected off the throttle plate right into the plastic lip of the manifold that overhangs into the 80mm adapter when you haven't ported the inlet to match. So imo, that would be an additional cost you would eventually end up ponying up for.