[1LE Red Dragon]

Originally Posted by EDFHOBBIES

you should be able to at least match the opening to of the snout or as they call it gasket matching to run the larger tb.. other porting would be more difficult.

The question is, can you successfully open up the snout opening to 95mm while the blower/snout is still on the car? You are going to be removing about 4mm of material around the opening to enlarge by 8mm in diameter.

I have seen this done in the past by people. They usually stuff rags inside the blower inlet then grind away. Once completed, you vacuum up the shavings you can see, and then pull the rags out to get any remaining shavings. I dont know what the material of casting is on the blower snout. Is it aluminum or iron?

[IneedAZ]

On the ZL1 drag car video from Sema they mentioned they installed a larger TB but made no mention of having to modify the opening. I thought they went with the 103mm TB, but not positive.

[laynlo15]

Yes matching would be much easier and probably take care of it.

[Alain]

Taking the supercharger off to get it ported puts this throttle body mod on a different level of modding.

I’m sure there is still some benefit to be had even when the supercharger snout is left stock. But I’m certain there are gains being left on the table by doing that.

[laynlo15]

I'm only talking about port matching the snout to match the 95mm TB.

[Fraxum]

Originally Posted by laynlo15

I'm only talking about port matching the snout to match the 95mm TB.

This! ^

Since the blower has to come off might as well port the whole blower.

So a Rotofab+95MM TB + Ported blower + Snout = Noticeable power jump.

[1LE Red Dragon]

Originally Posted by Fraxum

This! ^

Since the blower has to come off might as well port the whole blower.

So a Rotofab+95MM TB + Ported blower + Snout = Noticeable power jump.

From what I've and others have seen on logs of fuel trims, I would not suggest running the Rotofab without a MAF scale adjustment. Yes it will run and be safe and won't throw CEL, but it way over reports air mass. That may be why it loses torque. Once the MAF is rescaled it's a very good gain on a blower car.

Yes. You should get a noticable power jump with those mods. With over reporting MAF you may run into torque limits without a tune and get throttle closure though. My $.02

[wlsmoku]

Originally Posted by 1LE Red Dragon

From what I've and others have seen on logs of fuel trims, I would not suggest running the Rotofab without a MAF scale adjustment. Yes it will run and be safe and won't throw CEL, but it way over reports air mass. That may be why it loses torque. Once the MAF is rescaled it's a very good gain on a blower car.

Yes. You should get a noticable power jump with those mods. With over reporting MAF you may run into torque limits without a tune and get throttle closure though. My $.02

you hit the nail on the head and is the exact problem I ran into with just a vengeance CAI....couldnt tell much on the street, but at the track my 60ft times were HORRIBLE! I put the factory intake back on until I am ready to tune it and all is back to normal. you could literally feel the tq management ruining the launch

[Fraxum]

Originally Posted by 1LE Red Dragon

From what I've and others have seen on logs of fuel trims, I would not suggest running the Rotofab without a MAF scale adjustment. Yes it will run and be safe and won't throw CEL, but it way over reports air mass. That may be why it loses torque. Once the MAF is rescaled it's a very good gain on a blower car.

Yes. You should get a noticable power jump with those mods. With over reporting MAF you may run into torque limits without a tune and get throttle closure though. My $.02

This is news to me. I was thinking I could just run the RF and be okay. Is that not so? Otherwise I had hoped I would not need a tune for 95MM + Ported SC. But I figured I was dreaming. It's just once you tune you can't go back And I would feel guilty passing on a previously tuned car as stock. So I have the RF, I might as well try it.

[WEAPON-X]

we have these complete kits including optional porting for sale

https://weaponxmotorsports.com/produ...=8667505262683

[1LE Red Dragon]

Originally Posted by Fraxum

This is news to me. I was thinking I could just run the RF and be okay. Is that not so? Otherwise I had hoped I would not need a tune for 95MM + Ported SC. But I figured I was dreaming. It's just once you tune you can't go back And I would feel guilty passing on a previously tuned car as stock. So I have the RF, I might as well try it.

Yes. You can run it with no problems. However the stock MAF calibration is not perfect for the Rotofab. The LTFT will be negative a good bit. This is ok for safety standpoint but not ideal for power and torque. To get the most from it, the MAF needs calibrated. From what it seems a ported blower and snout on a stock tune is okay with the stock air box. The 95mm I would think would be as well if added. The Rotofab adds another variable and logs would need to be done.

[Fraxum]

Originally Posted by 1LE Red Dragon

Yes. You can run it with no problems. However the stock MAF calibration is not perfect for the Rotofab. The LTFT will be negative a good bit. This is ok for safety standpoint but not ideal for power and torque. To get the most from it, the MAF needs calibrated. From what it seems a ported blower and snout on a stock tune is okay with the stock air box. The 95mm I would think would be as well if added. The Rotofab adds another variable and logs would need to be done.

I see, and the stock intake does already flow pretty well. As you said in any case I need to start logging after any changes.

What is the best way to learn how to read a log? I know only enough to get myself into trouble.

But all of a sudden there is a new player:
https://www.camaro6.com/forums/showthread.php?t=540092

Now this is really interesting. Can Chevy void our warranties if we bolt on Chevy parts?

[Mcmillion]

Originally Posted by Fraxum

I see, and the stock intake does already flow pretty well. As you said in any case I need to start logging after any changes.

What is the best way to learn how to read a log? I know only enough to get myself into trouble.

But all of a sudden there is a new player:
https://www.camaro6.com/forums/showthread.php?t=540092

Now this is really interesting. Can Chevy void our warranties if we bolt on Chevy parts?

LoL, I agree best way to run the 95MM is to bolt on the blower it was made for

[EDFHOBBIES]

should work fine just will lose the o ring option most likely.. may have to seal with silicone or make a paper gasket..

get some dial calipers and measure where it goes to see if there is room for porting or make a template of a circle on paper with the new mm circumference place over the snout opening mark it and see how much room you can port, if ya do scribe lines then grind away..

I did all this back in 97 with my LT4 intake and TB. the gaskets on the original LT stuff especially LT4 were bigger than the Aluminum openings on the intake.. they laid over the heads pretty well after CNC porting from lingenfelter but the intake was terrible really had to gasket match the intake and tb ports.