Tune model vararam or Roto-Fab ?

[Bu3ali]

What produces more power when tuned ?.


I'm really confused .. I dont know which one i should get !!..


The only issue is that the tune model vararam needs to be tuned on the spot and im not sure if the diablo trinity has a proper tune for it ..

[axis]

Originally Posted by Bu3ali

What produces more power when tuned ?.


I'm really confused .. I dont know which one i should get !!..


The only issue is that the tune model vararam needs to be tuned on the spot and im not sure if the diablo trinity has a proper tune for it ..

We haven't had a "tuned CAI" shootout no one really knows which ones shine more with a tune. My thought process tells me that the ones that fair the best without a tune should have similar gains once tuned. This doesn't include tune ONLY models. They are designed to flow more air than the stock PCM can safely account for, hense the tune only status. They may also have driveability problems until your tuner can try to tune them out. AFAIK, handhelds don't have individual tunes for the tuner CAI's, right out of the box. Maybe one of the mail order tuners, like Jannetty has a tune that will work. If it's driveabilty problems, your best bet would be a dyno.

[Bu3ali]

would this combination be better than the vararam ?

ADM scoop, VMax CNC throttle body, and Roto-Fab


in your opinion.

its hard for me decide since i'm fairly new in the business of modifications.

[GMRULZ]

Originally Posted by Bu3ali

would this combination be better than the vararam ?

ADM scoop, VMax CNC throttle body, and Roto-Fab


in your opinion.

its hard for me decide since i'm fairly new in the business of modifications.

Depends on what you mean by good. I think it would be a great setup and would be very close to the same gains as the vararam. But w/ out a side by side comparo on the same car same dyno hard to tell if its better.

[IndeedSS1]

Originally Posted by Bu3ali

would this combination be better than the vararam ?

ADM scoop, VMax CNC throttle body, and Roto-Fab


in your opinion.

its hard for me decide since i'm fairly new in the business of modifications.

At the moment I have somewhat the combo you mention and not tuned, it feels great, but no numbers to back it up. That said, if you do go with the box behind the headlight box type like Roto-Fab, Halltech, CAI etc, definitely go for the scoop. This makes total sense and testing has proved it. I could tell an immediate improvement after adding the scoop.
Oh and the VMax. For the price, a good bang for the buck.

[danhr]

I would bet a pretty penny that the vararam performs better.

Back in the 4th gens the straight shot lid setups always performed better than the ones that took one or two 90* bends to get into the fenderwell. A fairly common upgrade for the lt1 guys was to modify their hoods to fit the ls1 lid on, because it consistantly put down 10-15 rwhp more than having a 90* bend in it (similar to the setup in the 5th gens)

[NickJRE]

We can write a custom tune for the Trinity specifically for the Vararam

[axis]

Originally Posted by danhr

I would bet a pretty penny that the vararam performs better.

Back in the 4th gens the straight shot lid setups always performed better than the ones that took one or two 90* bends to get into the fenderwell. A fairly common upgrade for the lt1 guys was to modify their hoods to fit the ls1 lid on, because it consistantly put down 10-15 rwhp more than having a 90* bend in it (similar to the setup in the 5th gens)

While that may have worked in the 4th gens, it's not been proven to be the same for the C5. I've yet to see a VR car UNTUNED, put down anywhere near the claimed 20+whp.

[danhr]

Originally Posted by axis

While that may have worked in the 4th gens, it's not been proven to be the same for the C5. I've yet to see a VR car UNTUNED, put down anywhere near the claimed 20+whp.

it really isn't a gimmick about claims or what the advertisement is, it's looking at the actual design. the vararam takes an airflow hurting 90* bend out of the equation. as well as less turbulence and more velocity.

part "A" could give a car an extra 80 rwhp, and part "B" can give a car an extra 70 rwhp..... does that mean part B is going to net a better ET? not always.

and I have yet to see ANY cold air intake gain 20 rwhp without any dyno tricks, untuned.

it's a never ending argument on this forum on "WHAT THE BEST COLD AIR INTAKE IS"

everyone and their mother has their own answer and swears by it.

[axis]

Originally Posted by danhr

it really isn't a gimmick about claims or what the advertisement is, it's looking at the actual design. the vararam takes an airflow hurting 90* bend out of the equation. as well as less turbulence and more velocity.

part "A" could give a car an extra 80 rwhp, and part "B" can give a car an extra 70 rwhp..... does that mean part B is going to net a better ET? not always.

and I have yet to see ANY cold air intake gain 20 rwhp without any dyno tricks, untuned.

it's a never ending argument on this forum on "WHAT THE BEST COLD AIR INTAKE IS"

everyone and their mother has their own answer and swears by it.

While I'll agree that it may have worked on the earlier models, it hasn't been PROVEN to work as good as a few of the other "90 degree bend" CAI. As i'm sure you know, this car is s completely different animal than any other generation. GM did a very good job on the PCM, exhaust, and intake, as far as performance goes. You could gain a lot of HP by tweaking those three on earlier generations. On this one you may get 25-30whp out of a tune and CAI and that's about it unless you go for LT"s. I don't hate the VR at all. It's finally a good setup that doesn't give people driveability problems and it looks nice. I don't agree with their advertised claims of 20-30whp and 25+ tq with no other mods. If I could find a couple of people that aren't affiliated with VR to show those gains, I may be inclined to believe them. Seeing that it's been out for about a year and I don't recall seeing a single dyno sheet show more than 10whp or so, i'm a bit skeptical. I will admit that it's probably a decent CAI, but until I see the proof that it's superior to all the others, I won't crown them king of the CAI's.

[IndeedSS1]

Here are my VR versus stock dynos. It is what it is and although the stock airbox was done last, we didn't reset the fuel trims after install. I've been told the stock numbers would have continued to drop as the trims relearned, increasing the gap between the two. The VR had been on there for a couple thousand miles.

[Roto-fab 1]

The Roto-fab intake does extremely well with a tune. I don't know of any publicized comparisons, but many well known and respected shops prefer our intake when it comes to power additives and tuning. I know from conversation they have done their own testing and choose ours based on what they see.

[Bu3ali]

What if i say


ADM scoop, VMax CNC throttle body, and Roto-Fab.

Vs.


Vararam and whatever that can be added to it.





what im after is something that makes me feel the difference. and since there was an issue about vararam having problems, its holding be back, BUT its the ones that i could easily lay my hands on quick since its available !!

I might have to wait for the roto-fab a couple of weeks

[danhr]

Originally Posted by IndeedSS1

Here are my VR versus stock dynos. It is what it is and although the stock airbox was done last, we didn't reset the fuel trims after install. I've been told the stock numbers would have continued to drop as the trims relearned, increasing the gap between the two. The VR had been on there for a couple thousand miles.

those numbers are STD numbers, so they can't be used to compare before/after dyno numbers