Overkill Products-80mm Throttle Body, Tuning Service, E85 Kit

[Shawno72]

Originally Posted by Redhotls1

Good point. The only thing I had was k&n cai,VTC and a few days ago added a tune. I cannot tell power numbers. But from pretty much stock to now is a big difference. It's not only the increase in power but it is where you feel it. Let me explain. Now I have a manual so I didn't like rpm points I would shift at, it just felt I had to shift in lower rpm to get a smooth shift or if I wanted to carry power through the shift then I'd shift at higher rpm's which would give that torque-ee feel(not in the good way).
Now I can shift pretty much at any rpm and the power will carry over to the next gear smoothly and with great drivability. I'm not into burning the tires out at every shift but I like to lay the power to the road.
About the only thing the k&n did for me was give that deep throaty cool sound but now it actually lets air through into the engine to let it make power. I equate it to my old school V8 cars only with some badass handling of these camaros.

I agree. Now that I've installed the Vmax throttlebody Jacfab ported intake and spacer along with all my other mods in the car seems to have plenty of torque down low in the rpm band. Before it always had that herky-jerky kind of feel as accelerated, but now it's nice and smooth and powerful. I can't wait to get this to install later today to see how much more that brings the table

[SIM GhostrdrZ]

I used the factory tb bolts as I felt better about the thread contact with the spacer overkill provides. That's just me. The factory bolts stuck out of the spacer about 1/4" or so but the supplied bolts left about that much of thread contact that was unused inside spacer. I trimmed about 1/2" off the tb of the intake tube( the width of the spacer) but this setup fits nicely and after test driving it around the highway for awhile today, I would suggest anyone gets it that is holding back. This lfx has more in it than I expected. I expect the e85 and supercharged/turbo will just enhance this set up.

[SIM GhostrdrZ]

Originally Posted by JantzenOKC

That thing looks massive!

I don't think I could ever do this mod though.. That cockeyed throttle body would always bother me and my OCD. But I'm definitely curious if you guys pick up any power and if you lose any low end torque from it.

I thought the same thing about the looks and torque loss. I would say if not for the intake extension adding torque that it would suffer a bit on the low end. I'm guessing that is where it is coming from but either way the low end torque comes on perfect. Not too soon as to just burn the tires but just as they start gripping. It's an excellent combo for me driving on the road.
As far as the ocd, I'm right there with you. The webbed intake is more bothersome for me than the rotated tb. Maybe they compliment each other to make it tolerable.

[SIM GhostrdrZ]

Originally Posted by Sanjay Collins

Yeah, you guys pretty much the opposite of me. I wish the IPF tune wasn't so smooth with power delivery. It makes the car feel slower when it isn't jerking me around. That's why i like the VTC so much.

Also, Redhotls1, if you decide to change out for downpipes, definitely get the high flows. You will not like the bottom end on the catless downpipes. My car is useless under 3,000 RPMs.

Thanks for the heads up. I wonder if the high flows would return similar results as catless. I definitely would not want to give up any more low end torque. I will mess with my VTC setting now. I put it on sp1 for now. I did drive around on sp5 before the tune and this setup. I need to drive it and get this winter gas out and get good fresh 93 in it. I try to run it enough through the winter but it's a hit and miss with salt, snow or both on the roads in Ohio.

[SIM GhostrdrZ]

Originally Posted by Shawno72

I agree. Now that I've installed the Vmax throttlebody Jacfab ported intake and spacer along with all my other mods in the car seems to have plenty of torque down low in the rpm band. Before it always had that herky-jerky kind of feel as accelerated, but now it's nice and smooth and powerful. I can't wait to get this to install later today to see how much more that brings the table

I think chevy has figured out that we like modding these 6's and put out that 17 v6 1le. But I think it falls short still your current mods and the 5th gen style.

[derek1387]

I felt a little MORE on the bottom with my HFC's...but at the same time smoother.

[willoverkill]

Thanks Derek for putting a post up, very nice of you!

Originally Posted by JantzenOKC

That thing looks massive!

I don't think I could ever do this mod though.. That cockeyed throttle body would always bother me and my OCD. But I'm definitely curious if you guys pick up any power and if you lose any low end torque from it.

For those with OCD, I could supply my front drive adapter plate which has less rotation. I don't know what the hood clearance is like with the JacFab spacer, it could be just fine, perhaps Derek will have to test this for me so we know for sure.

You won't lose any low end torque from this throttle body, on the contrary. Throttle tip in will be better since the same movement on this 80mm blade moves so much more air than the stock 72mm for the same rotation.

The caveat is that the LFX uses a torque based throttle control system at part throttle. Basically so much pedal input at suchnsuch an engine rpm the computer is aiming for a specific engine torque output, and will use multiple items including the throttle body opening to achieve this. Remapping this makes a big difference with the 80mm throttle body, I have specific maps for both the stock TB and 80mm TB. Otherwise, the computer will simply slow the opening rate of the larger throttle body so it achieves the same torque per pedal/rpm as before.

[Shawno72]

Originally Posted by willoverkill

Thanks Derek for putting a post up, very nice of you!



For those with OCD, I could supply my front drive adapter plate which has less rotation. I don't know what the hood clearance is like with the JacFab spacer, it could be just fine, perhaps Derek will have to test this for me so we know for sure.

You won't lose any low end torque from this throttle body, on the contrary. Throttle tip in will be better since the same movement on this 80mm blade moves so much more air than the stock 72mm for the same rotation.

The caveat is that the LFX uses a torque based throttle control system at part throttle. Basically so much pedal input at suchnsuch an engine rpm the computer is aiming for a specific engine torque output, and will use multiple items including the throttle body opening to achieve this. Remapping this makes a big difference with the 80mm throttle body, I have specific maps for both the stock TB and 80mm TB. Otherwise, the computer will simply slow the opening rate of the larger throttle body so it achieves the same torque per pedal/rpm as before.

Have you done or know of any testing of the E85 kit? To see what gains there are?

[Shawno72]

I am ready for some "tunetime". Come on Will lets get this car on the road

Got me sitting here waiting for an email like

Sorry Will I'm just excited to continue this short bolt on journey.

[derek1387]

Originally Posted by willoverkill

Thanks Derek for putting a post up, very nice of you!



For those with OCD, I could supply my front drive adapter plate which has less rotation. I don't know what the hood clearance is like with the JacFab spacer, it could be just fine, perhaps Derek will have to test this for me so we know for sure.

You won't lose any low end torque from this throttle body, on the contrary. Throttle tip in will be better since the same movement on this 80mm blade moves so much more air than the stock 72mm for the same rotation.

The caveat is that the LFX uses a torque based throttle control system at part throttle. Basically so much pedal input at suchnsuch an engine rpm the computer is aiming for a specific engine torque output, and will use multiple items including the throttle body opening to achieve this. Remapping this makes a big difference with the 80mm throttle body, I have specific maps for both the stock TB and 80mm TB. Otherwise, the computer will simply slow the opening rate of the larger throttle body so it achieves the same torque per pedal/rpm as before.

I can do that WIll-just let me know what you need measured exactly and ill get it done.

[badillaclfx]

Will I'm curious. Do the cts's still need the e85 kit. I read your can just put e85 in the tank and be fine. Apparently a different setup than the camaro?

[derek1387]

Originally Posted by badillaclfx

Will I'm curious. Do the cts's still need the e85 kit. I read your can just put e85 in the tank and be fine. Apparently a different setup than the camaro?

I would check your owners manual to be sure. As long as it has a flex fuel sensor it would be fine.

[badillaclfx]

I checked but you know how "specific" the owners manual can be lol.... I was only asking since he has done tuning and work on both the ats and cts lfx

[derek1387]

Originally Posted by badillaclfx

I checked but you know how "specific" the owners manual can be lol.... I was only asking since he has done tuning and work on both the ats and cts lfx

Agreed. Might be able to run the VIN to find out?