RotoFab vs Big Gulp

HyperBlu17 · 03-19-2019, 08:02 AM

Does anyone have any experience with both? It seems everyone has one or the other and I found several people sell their RotoFab in the for sale section in favor of the big gulp but I'm curious how much difference or better it is even on a non 800+hp car. I'm having second thoughts about mine and may order a big gulp and compare the two on the dyno, as I've yet to find anyone really post about any results other than the manufacture themselves. Yes, I saw CSP post a video where they picked up 20rwhp but this was on his 760rwhp car. Decisions, decisions

Markoz28 · 03-19-2019, 08:13 AM

I think the BG is beneficial once you run a larger TB like a 103. Also I don’t think it does any good without a tune. No experience with the BG just speculating.

HyperBlu17 · 03-19-2019, 08:20 AM

I know the BG requires a tune and at this point its irrelevant to me since its finally going to the shop anyway. I feel like I jumped the gun and should have ordered it in the first place as I will be increasing boost and adding more mods.

Chris V · 03-19-2019, 08:28 AM

I just put the Big Gulp on mine, and Roto-Fab said it wasn't needed at my power levels, but I figured it won't hurt and I won't have to buy it again when I build the motor. No comparison dynos though.

Conservative tune, no pulley changes from the original Whipple configuration.

SJFGTO · 03-19-2019, 08:51 AM

An engine will only effectively use so much air / air velocity. A tune to account for a larger CAI should increase power / throttle response up to a point. But unless the engine actually can use a significant increase in flow / velocity (larger TB, ported blower, headers, pulley, etc) adding a significantly larger CAI and even tuning for it is not likely to be a good cost benefit mod. I have no experience with a big gulp, so its just my opinion. Engine mods should compliment each other and add to overall efficiency, adding huge amounts of air to an engine without corresponding mods to take advantage wont have the desired effect IMO.

TripleBlkZL1 · 03-19-2019, 01:55 PM

I picked another 20rwhp with the big gulp over the 4” intake but I have heads, cam, ported blower, 103mmtb, etc

Rlhay2 · 03-19-2019, 03:06 PM

Quote:

Originally Posted by HyperBlu17

Does anyone have any experience with both? It seems everyone has one or the other and I found several people sell their RotoFab in the for sale section in favor of the big gulp but I'm curious how much difference or better it is even on a non 800+hp car.

Simple correlation:

OEM camshaft = standard RotoFab CAI
aftermarket camshaft = Big Gulp RotoFab CAI

HyperBlu17 · 03-19-2019, 03:38 PM

Thanks guys and yeah I get it, you want mods to support and get the most out of others which is why I may go ahead and pull the trigger and see what happens. I don't plan on a cam or anything extreme anytime soon but it is going in the shop for a lower pulley, 2" TSP headers with x-pipe, flex fuel sensor and tune on top of the ported TB and RotoFab.

laynlo15 · 03-19-2019, 05:23 PM

Higher hp cars will benefit the most. I've run them all from the corrugated elbows, solid 4" small gulp and now the big 5" gulp. But I am at the 800 rwhp now so I'd say it benefited mine also but don't have numbers since I couldn't run back to back test since I'd already sold my 4". But I know Mike very well from Roto-Fab and I've seen numbers confirming what was said in an above post. If your not running a 103 then stay with the 4" since you'd have to reduce the big gulp just to get it to work. I might end up with a 112 NW TB at some point so the big gulp was a no brainer for me.

HyperBlu17 · 03-20-2019, 08:57 AM

Its ordered, so I'm gonna compare it and see how it goes. Already spoke with the shop and once its all tuned and they get numbers, they'll pull the 4" off and install the BG and tune for that and see what happens. After all is done I'll have my RotoFab up for sale.

Markoz28 · 03-20-2019, 09:31 AM

I’m thinking you’ll still make power over the 4” with the BG. Maybe 5-10whp which in my book would be worth it.

Zigg L1 · 05-11-2020, 04:37 PM

Thoughts still the same with Roto-fab big gulp vs Standard. I have the big gulp is there any negative effects with the big gulp? I just have stock TB for now. With headers and full exhaust. Probably just a lower pulley and me maybe meth.
For an extra $50 bucks is it worth it?

Joshinator99 · 05-11-2020, 06:06 PM

Quote:

Originally Posted by Zigg L1

Thoughts still the same with Roto-fab big gulp vs Standard. I have the big gulp is there any negative effects with the big gulp? I just have stock TB for now. With headers and full exhaust. Probably just a lower pulley and me maybe meth.
For an extra $50 bucks is it worth it?

At your power level, you don’t “need” the Big Gulp. But I also didn’t need it when I first bolted on the Whipple. It isn’t long before you’re turning up the wick... then you’re glad you bought the big one to begin with.

FWIW, my tuner felt like he spent more time getting the MAF calibration right with the 5” BG tube than anything else.

Zigg L1 · 05-11-2020, 08:15 PM

Quote:

Originally Posted by Joshinator99

At your power level, you don’t “need” the Big Gulp. But I also didn’t need it when I first bolted on the Whipple. It isn’t long before you’re turning up the wick... then you’re glad you bought the big one to begin with.

FWIW, my tuner felt like he spent more time getting the MAF calibration right with the 5” BG tube than anything else.

Well I didn't get the big gulp to begin with but I thought it was good to have for future use. Just wanted to make sure that I would not have any negative results.
I will sell one or the other when I figure out what one to keep. Probably going to keep the big gulp and sell the regular roto-fab

03-19-2019, 08:02 AM	#1
HyperBlu17 Drives: 2017 HBM ZL1 Join Date: Feb 2019 Location: Artesia Posts: 43	RotoFab vs Big Gulp Does anyone have any experience with both? It seems everyone has one or the other and I found several people sell their RotoFab in the for sale section in favor of the big gulp but I'm curious how much difference or better it is even on a non 800+hp car. I'm having second thoughts about mine and may order a big gulp and compare the two on the dyno, as I've yet to find anyone really post about any results other than the manufacture themselves. Yes, I saw CSP post a video where they picked up 20rwhp but this was on his 760rwhp car. Decisions, decisions __________________ 2017 HBM ZL1-M6-RotoFab CAI, 2" TSP LT's, 9.84 Lower, 2.30" upper, Kong X port SC, PRC heads/cam, meth/alky injection, DSX aux fuel system, W/E-900.2/875.6

03-19-2019, 08:20 AM	#3
HyperBlu17 Drives: 2017 HBM ZL1 Join Date: Feb 2019 Location: Artesia Posts: 43	I know the BG requires a tune and at this point its irrelevant to me since its finally going to the shop anyway. I feel like I jumped the gun and should have ordered it in the first place as I will be increasing boost and adding more mods. __________________ 2017 HBM ZL1-M6-RotoFab CAI, 2" TSP LT's, 9.84 Lower, 2.30" upper, Kong X port SC, PRC heads/cam, meth/alky injection, DSX aux fuel system, W/E-900.2/875.6

03-19-2019, 08:28 AM	#4
Chris V Drives: 2017 1SS 1LE Join Date: Aug 2017 Location: New Jersey Posts: 391	I just put the Big Gulp on mine, and Roto-Fab said it wasn't needed at my power levels, but I figured it won't hurt and I won't have to buy it again when I build the motor. No comparison dynos though. Conservative tune, no pulley changes from the original Whipple configuration. __________________ www.facebook.com/1lap1le 2017 1SS 1LE - 663 whp/623 wtq Rotofab/Whipple/Kooks 2"/LT5 TB/LT4 Fueling/E85/MCS Coilovers/Ground Control/GOODAero/Apex Wheels/Race Louvers

03-19-2019, 08:51 AM	#5
SJFGTO Oh Oh it's Friday Night! Drives: 2018 ZL1 1LE Nightfall Gray Join Date: Jan 2018 Location: Walton Woods Posts: 1,061	An engine will only effectively use so much air / air velocity. A tune to account for a larger CAI should increase power / throttle response up to a point. But unless the engine actually can use a significant increase in flow / velocity (larger TB, ported blower, headers, pulley, etc) adding a significantly larger CAI and even tuning for it is not likely to be a good cost benefit mod. I have no experience with a big gulp, so its just my opinion. Engine mods should compliment each other and add to overall efficiency, adding huge amounts of air to an engine without corresponding mods to take advantage wont have the desired effect IMO. __________________ 2018 Camaro ZL1 1LE NFG; ARH 2” headers, catless mids, ARH full exhaust, Lingenfelter 18% lower pulley, ATI Harmonic Balancer, Roto-fab CAI, EE-catch can, TM ported TB, NX Lid, BMR strut tower brace. Aeroforce dual pod interceptor gauges. Tuned by Vengeance Racing!!! 644 HP @ 6250 rpm / 689 trq @ 3660 rpm Four that wanna own me Two that wanna stone me One says she's a friend of mine... Last edited by SJFGTO; 03-19-2019 at 06:41 PM.

03-19-2019, 01:55 PM	#6
TripleBlkZL1 Drives: 18 ZL1 A10 & 18 2500HD Duramax Join Date: Oct 2012 Location: Chicago, IL Posts: 733 View My Garage	I picked another 20rwhp with the big gulp over the 4” intake but I have heads, cam, ported blower, 103mmtb, etc __________________ Procharged 2018 ZL1 A10 2018 2500HD Duramax

03-19-2019, 08:13 AM	#2
Markoz28 Drives: 18 ZL1 nightfall grey A10 Join Date: Apr 2018 Location: RGV Texas Posts: 1,527	I think the BG is beneficial once you run a larger TB like a 103. Also I don’t think it does any good without a tune. No experience with the BG just speculating.

03-19-2019, 03:38 PM	#8
HyperBlu17 Drives: 2017 HBM ZL1 Join Date: Feb 2019 Location: Artesia Posts: 43	Thanks guys and yeah I get it, you want mods to support and get the most out of others which is why I may go ahead and pull the trigger and see what happens. I don't plan on a cam or anything extreme anytime soon but it is going in the shop for a lower pulley, 2" TSP headers with x-pipe, flex fuel sensor and tune on top of the ported TB and RotoFab. __________________ 2017 HBM ZL1-M6-RotoFab CAI, 2" TSP LT's, 9.84 Lower, 2.30" upper, Kong X port SC, PRC heads/cam, meth/alky injection, DSX aux fuel system, W/E-900.2/875.6

03-19-2019, 05:23 PM	#9
laynlo15 Drives: 2022 Lt1 A10 Join Date: Nov 2015 Location: clark, mo Posts: 8,860	Higher hp cars will benefit the most. I've run them all from the corrugated elbows, solid 4" small gulp and now the big 5" gulp. But I am at the 800 rwhp now so I'd say it benefited mine also but don't have numbers since I couldn't run back to back test since I'd already sold my 4". But I know Mike very well from Roto-Fab and I've seen numbers confirming what was said in an above post. If your not running a 103 then stay with the 4" since you'd have to reduce the big gulp just to get it to work. I might end up with a 112 NW TB at some point so the big gulp was a no brainer for me. __________________ 2022 Lt1 6.2 A10, Maggie 2300, THPSI Port Inj/10 rib, Rotofab, E, Nickey, SCOL, Griptech, RC Bandits, Hoosiers/MT 9.80@142.96 1.44 60ft, 6.34@112 707/669 RWHP/TRQ. 16SS Maggie 2650 9.41@147 1.35 60ft, 5.99@119. 16 C7 A8 10.90@128 Bolt on stuff

03-20-2019, 08:57 AM	#10
HyperBlu17 Drives: 2017 HBM ZL1 Join Date: Feb 2019 Location: Artesia Posts: 43	Its ordered, so I'm gonna compare it and see how it goes. Already spoke with the shop and once its all tuned and they get numbers, they'll pull the 4" off and install the BG and tune for that and see what happens. After all is done I'll have my RotoFab up for sale. __________________ 2017 HBM ZL1-M6-RotoFab CAI, 2" TSP LT's, 9.84 Lower, 2.30" upper, Kong X port SC, PRC heads/cam, meth/alky injection, DSX aux fuel system, W/E-900.2/875.6

03-20-2019, 09:31 AM	#11
Markoz28 Drives: 18 ZL1 nightfall grey A10 Join Date: Apr 2018 Location: RGV Texas Posts: 1,527	I’m thinking you’ll still make power over the 4” with the BG. Maybe 5-10whp which in my book would be worth it.

05-11-2020, 04:37 PM	#12
Zigg L1 Drives: 2018 ZL1 Garnet Red Tintcoat A10 Join Date: Jan 2019 Location: NY Posts: 537	Thoughts still the same with Roto-fab big gulp vs Standard. I have the big gulp is there any negative effects with the big gulp? I just have stock TB for now. With headers and full exhaust. Probably just a lower pulley and me maybe meth. For an extra $50 bucks is it worth it?

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