3.0L Whipple

Looking into either a 2.9 or 3.0L whipple and looking for guidance with what supporting mods will be needed.
Have a goal of reaching 650rwhp on pump gas 94 octane. Car will be street driven only

Current mods
Smaller pulley
Jlt intake
Off road x
Flowmaster catback
Mcleod RST twin disk

I’ll be selling a Gen2 2.9 with accufab TB and KN CAI soon.

Just ordered a 3.0l.

A Gen2 will do 650 on 94. Mine did 590/540 on 91.


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I made 617rwhp with a gen 4 standard inlet at 18psi. FWIW.

You're going to need bigger pumps, injectors, and MAF. Personally I'd set up for E85 just in case. Unless it's not available near you.

An RST won't cut it, you will need an RXT.

01yellercobra said:

I made 617rwhp with a gen 4 standard inlet at 18psi. FWIW.

You're going to need bigger pumps, injectors, and MAF. Personally I'd set up for E85 just in case. Unless it's not available near you.

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Any chance you can send me the links to these? Or possibly just the brand names you would go with.

cobracide said:

An RST won't cut it, you will need an RXT.

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The RST was on order, will get the RXT instead. Thank you

feel free to message, and we can help out, running 10% for black friday

Termin8r_ said:

Any chance you can send me the links to these? Or possibly just the brand names you would go with.

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I'm running a Fore level 2 return system and ID1050X injectors. Both of which I ordered through Malcolm on here.

For the MAF I have a BA3000, but I don't remember where I picked it up. I've had it a few years.

Termin8r_ said:

Any chance you can send me the links to these? Or possibly just the brand names you would go with.

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There’s three routes to go in the fuel system.

Boost a pump; I was fine at 590 wheel but not sure the limits of these on stock pumps

Better pumps and stay returnless style

Switch to returnless along with bigger pumps.

For fuel system components use Fore.

Pumps I use Walbro.

If you keep the stock fuel hat I’m not sure what you’re limited to on pumps.

Injectors: most use Ford, injector dynamics, or fuel injector clinic.

I’ll have ID 1000s FS shortly.




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I mean, Im not a fan of running those blowers on pump gas, but, if I had to pick one, it would be the 2.9 on 19lbs of boost

stangfreak said:

I mean, Im not a fan of running those blowers on pump gas, but, if I had to pick one, it would be the 2.9 on 19lbs of boost

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Why? The 3.0l is way more efficient.


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The 3.0L whipple will start to shine over the other blowers when its being pushed at its sweet spot. If you are going to keep the car on pump gas, I would go with a smaller blower unless you build the motor and want room in the future. I will take a guess here, that, if you run a 3.0L on pump gas, people will start to complain about loosing the low end grunt and the car will feel sluggish down low. Just how the people complained with the 3.4L whipple. 3.4 whipple + stock motor + pump gas do not belong in the same sentence. Running 18lbs of boost. I am assuming it will be the same with the gen 5 3L. I have spoken to a few guys who built there cobra's with the 3L and are racing them and they even confirmed it as well. They are all running 25lbs which is where the blower needs to be spun. These blowers need boost. Its the same principle that applied years ago when people were running 15lbs of boost with a 2.2L kenne bell and wondered why a ported eaton was door to door with them. Yea there peak hp numbers looked cool but, it did nothing.

I bought my 2.9 whipple when it literally hit the market. I run MS100 on 22-23lbs of boost. My car with the 2.9 will never see 93 octane. E85 or race gas. There is no point in running big blowers on pump gas. If you have E85 on pump that is the way to go. Just being honest. I have done many twin screw swaps on my cobra. And its all the same.

If you guys want to run pump, make decent power and have a strong running car, build the motor with more compression, cubic inches, increase the rev limiter or just buy a coyote mustang and that will solve all the problems. New technology. Just saying. Again its just my opinion and I could be totally wrong. Iv owned my cobra for 18 years and been down this road many many times.

stangfreak said:

The 3.0L whipple will start to shine over the other blowers when its being pushed at its sweet spot. If you are going to keep the car on pump gas, I would go with a smaller blower unless you build the motor and want room in the future. I will take a guess here, that, if you run a 3.0L on pump gas, people will start to complain about loosing the low end grunt and the car will feel sluggish down low. Just how the people complained with the 3.4L whipple. 3.4 whipple + stock motor + pump gas do not belong in the same sentence. Running 18lbs of boost. I am assuming it will be the same with the gen 5 3L. I have spoken to a few guys who built there cobra's with the 3L and are racing them and they even confirmed it as well. They are all running 25lbs which is where the blower needs to be spun. These blowers need boost. Its the same principle that applied years ago when people were running 15lbs of boost with a 2.2L kenne bell and wondered why a ported eaton was door to door with them. Yea there peak hp numbers looked cool but, it did nothing.

I bought my 2.9 whipple when it literally hit the market. I run MS100 on 22-23lbs of boost. My car with the 2.9 will never see 93 octane. E85 or race gas. There is no point in running big blowers on pump gas. If you have E85 on pump that is the way to go. Just being honest. I have done many twin screw swaps on my cobra. And its all the same.

If you guys want to run pump, make decent power and have a strong running car, build the motor with more compression, cubic inches, increase the rev limiter or just buy a coyote mustang and that will solve all the problems. New technology. Just saying. Again its just my opinion and I could be totally wrong. Iv owned my cobra for 18 years and been down this road many many times.

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Oh I get the premise of the argument but any Gen 2.9 is less efficient than the 3.0l

In fact, I suspect the 3.0l will improve the low end over my Gen2 2.9.

I wouldn’t say the low end in my current setup is weak at all anyways. I’m actually fighting traction issues in 2nd on DR.


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stangfreak said:

The 3.0L whipple will start to shine over the other blowers when its being pushed at its sweet spot. If you are going to keep the car on pump gas, I would go with a smaller blower unless you build the motor and want room in the future. I will take a guess here, that, if you run a 3.0L on pump gas, people will start to complain about loosing the low end grunt and the car will feel sluggish down low. Just how the people complained with the 3.4L whipple. 3.4 whipple + stock motor + pump gas do not belong in the same sentence. Running 18lbs of boost. I am assuming it will be the same with the gen 5 3L. I have spoken to a few guys who built there cobra's with the 3L and are racing them and they even confirmed it as well. They are all running 25lbs which is where the blower needs to be spun. These blowers need boost. Its the same principle that applied years ago when people were running 15lbs of boost with a 2.2L kenne bell and wondered why a ported eaton was door to door with them. Yea there peak hp numbers looked cool but, it did nothing.

I bought my 2.9 whipple when it literally hit the market. I run MS100 on 22-23lbs of boost. My car with the 2.9 will never see 93 octane. E85 or race gas. There is no point in running big blowers on pump gas. If you have E85 on pump that is the way to go. Just being honest. I have done many twin screw swaps on my cobra. And its all the same.

If you guys want to run pump, make decent power and have a strong running car, build the motor with more compression, cubic inches, increase the rev limiter or just buy a coyote mustang and that will solve all the problems. New technology. Just saying. Again its just my opinion and I could be totally wrong. Iv owned my cobra for 18 years and been down this road many many times.

Click to expand...

So I do plan to build the motor down the road, that was the only reason behind opting for the 3.0L whipple instead now. I am willing to go e85, however its not readily available near me and also we do not have e85 on pump anywhere. I do understand where your coming from and may have to consider the 2.9 and upgrade later
Thanks for the input

Termin8r_ said:

So I do plan to build the motor down the road, that was the only reason behind opting for the 3.0L whipple instead now. I am willing to go e85, however its not readily available near me and also we do not have e85 on pump anywhere. I do understand where your coming from and may have to consider the 2.9 and upgrade later
Thanks for the input

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Dude that would be foolish unless you get a really good deal on a 2.9.

All the “no low end torque” comments are hard to buy for me anyways.

Even on 91 and 15psi, my 2.9 Whipple could make MT SS fight all the way through second. That was 590/540. I really doubt an Eaton car would do that.

On E85 and 19/20 psi I can blow the DR off at almost any RPM. Stab it at 2500 RPM and I’m sideways immediately. I’m still a couple thousand under max blower RPM.


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Technology changes. You can't compare the newer blowers to something from 5 years ago. The newer blowers don't lag on low end torque at "low" boost. I'm sure there's still a sweet spot, but it isn't as narrow as it used to be. I imagine a 3.0L at 18psi would still pull like a freight train even on 91. I know my 2.9 does.

I want to say even the Gen4 was putting down about 50whp more than old Gen2s at the same boost.

Also make 3-4 psi more at same rpm.


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Termin8r_ said:

So I do plan to build the motor down the road, that was the only reason behind opting for the 3.0L whipple instead now. I am willing to go e85, however its not readily available near me and also we do not have e85 on pump anywhere. I do understand where your coming from and may have to consider the 2.9 and upgrade later
Thanks for the input

Click to expand...

Im out of the debate. We have been proving this for the past 18 years and I am literally not in the mood to explain this anymore. Iv driven and hung out with the best cobra drivers in this community. The ones who put the work and research into what works for these cars. Listen to the guys who bought a 2.9L whipple and a 3.0L whipple and are running 15lbs of boost on 91 octane. Thats almost as comical as the guys running a 2.76 upper and a 6lb lower on a eaton. I just gave my opinion. Nothing else. Get the big blower and run low boost. You might be happy with it. It may feel powerful down low and you may make huge numbers. But if you want to make 540 rwtq with a twinscrew, which to me is a joke, yea go run 91 octane and 15lbs.

Talk and learn to the guys racing these cars that are breaking the 03 cobra 6 speed record. These big blowers will only start to outshine each other when they are being pushed. Not at low boost. Iv talked to them a million times. even when the gen 4 came out, I was talking to nostradamus racing, he is in the KNOW with whipple. He even told me, dont buy it unless you are going to run over what your 2.9 whipple is at. None of these guys are running 15lbs or 18lbs. Boost is not your friend. These guys with big blowers would love to get away with running lower boost and go fast. But they cant! lol

It was also stated, "I doubt that a eaton cobra will break the tires loose like a twinscrew even at 15lbs" . lol. VENOMOUS03COBRA was getting ready for a track rental back in the day. He had a apten ported eaton making 516 rwhp and I think 550ish rwtq. He called me to hang out at the shop. He was mounting his slicks and skinnies on the car and we were going to go test it. From a dig, in a EATON CAR, with slicks, we were going sideways and spinning crossing over the other lane fighting traction. its a small blower being overspun making crazy tq under the curve. My eaton setup with a 2.8 upper 4lb lower was violent as ****. It was disgusting. violent.

At the end of the day, I am not here to argue or make enemies. Its your car, you are paying the bills for it. You do what you like., You will get 50 different replies. I stick to what I know and wht I learned. Good luck with the build.

01yellercobra said:

Technology changes. You can't compare the newer blowers to something from 5 years ago. The newer blowers don't lag on low end torque at "low" boost. I'm sure there's still a sweet spot, but it isn't as narrow as it used to be. I imagine a 3.0L at 18psi would still pull like a freight train even on 91. I know my 2.9 does.

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I would never run 91 octane, 18lbs of boost on a big blower. who tuned your car? wow. Yea its going pull. lol. Its a big twinscrew. 18lbs is not 15lbs. Thats a huge jump in power. Drive a 2.9 whipple on 23 24lbs and then drive your 2.9 at 15 18lbs. it will piss all over your setup. its night and day. why, bc its being ran where it should be. you CAN run low boost, but dont expect it to run how it really should. That is what I am saying. But now a days, nobody runs these big blowrs on pump gas. Its a waste. and e85 19lbs and pump gas 19lbs is also different.

stangfreak said:

I would never run 91 octane, 18lbs of boost on a big blower. who tuned your car? wow. Yea its going pull. lol. Its a big twinscrew. 18lbs is not 15lbs. Thats a huge jump in power. Drive a 2.9 whipple on 23 24lbs and then drive your 2.9 at 15 18lbs. it will piss all over your setup. its night and day. why, bc its being ran where it should be. you CAN run low boost, but dont expect it to run how it really should. That is what I am saying. But now a days, nobody runs these big blowrs on pump gas. Its a waste. and e85 19lbs and pump gas 19lbs is also different.

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I tuned my car. It made 617rwhp on 18psi. So yeah, it pulled. I would expect a set up making 5-6psi to run harder than mine. Anyone who thinks different needs to change their thinking.

FYI, I'm at 21psi and E85 now so I can compare old to new.

It's almost like I had experience before I spoke. Weird.