Numbers are in: Whipple Gen 4 2.9

whipple1raptor

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Hi all...

Preliminary numbers are in:
780 crank hp
93 octane 619rwhp
E85 644rwhp
On 17lbs of boost.
There is belt slippage up top at around 6200rpm. So new belt is coming and it should go over 650rwhp. They will fix that tomorrow.
Going to keep it 17lbs of boost to play it safe.

If I want more I have that option.

When I upgrade my brakes, I’ll probably switch the pulley to get to 700rwhp. I want to see how it feels first.

Final numbers tomorrow, when the belt is changed.

IMG_1041.JPG



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whipple1raptor

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Original set up before the new blower as far as engine mods anyway were:

Stock pulley from factory. Still had the belt shroud over it. American racing long tubes, American racing catted x pipe and Borla attack mufflers and a retune.
Car Dyno’d @ 450rwhp.


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whipple1raptor

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Original set up before the new blower as far as engine mods anyway were:

Stock pulley from factory. Still had the belt shroud over it. American racing long tubes, American racing catted x pipe and Borla attack mufflers and a retune.
Car Dyno’d @ 450rwhp.


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whipple1raptor

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Is this a stock motor?
Real Good numbers for 17#


Well Whipple’s claim to fame on this GEN was higher hp @ lower boost levels. The 17lbs was right out of the box from the CRUSHER kit. Hopefully this 200hp @ the wheels increase will satisfy me for a while .

+ On Whipple's website noted can go higher numbers above 17lbs of boost on modified engine's.



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whipple1raptor

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Man if you on e85 you need a put a smaller pulley on that blower and move some air. Great numbers on such low boost.

I'm tempted.... I want to see how it feels + I'm on stock brakes. Don't want to push it . I am surprised by the numbers, instant 200hp increase to the wheels. Looking forward to the numbers tomorrow once the belt slip issue is fixed.


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c6zhombre

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That's pretty darn good for 17psi....but that's not even close to the sweetspot on that blower. 24+ psi or whatever is that blower rpm seems to be the point it goes completely bonkers with hp/tq. More of a head scratcher is how close the pump gas # is to the E85 number.....that does not make sense. There should be a bigger difference than 25hp. I would question the total timing on the E85 tune....bet it's lower than what is generally seen (22-23). Maybe the belt slip is that bad....but 17psi is so low, I'm not sure why the belt is slipping at all with that large of an upper.

You are not going to fly off the road with the stock brakes, not sure why you're so petrified of those lol. Unless you're auto x'n, half mileing or repeated 150+ mexico racing.....you're biggest problem will be how you control the throttle, not the brake. They will work fine for sane weekend cruiser. You could have the most capable brakes available for these cars and still fly the car off the road because of the right side pedal.

Pro tip - do not quote those crank numbers or people will get a chuckle.
 

02gt87

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Couldve saved some serious coin going with a smaller blower like a 2.2 or 2.3 pushing 17lbs. Same exact numbers would been achieved at that boost level.

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94slowbra1

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^^^ this, the throttle is a bigger enemy than your brakes. The rear end will slide much easier than you not being able to rein it in quick enough.
Yes the brakes leave a little to be desired but that's if your pushing them
 

c6zhombre

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Couldve saved some serious coin going with a smaller blower like a 2.2 or 2.3 pushing 17lbs. Same exact numbers would been achieved at that boost level.

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That's true....but he also has the capability of going to 800 once he sends it. That's the game changer.

What's been the negative of spinning a larger blower well under 20psi is they were "lazy" low and mid range versus a smaller blower spinning same range. These gen4 rotors are billed as revolutionary to combat that label. I'd like to see these 17psi dyno charts to see the entire curve versus just posting the peak number.
 

whipple1raptor

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Couldve saved some serious coin going with a smaller blower like a 2.2 or 2.3 pushing 17lbs. Same exact numbers would been achieved at that boost level.

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Only temporary.... They aren't going to charge me for a retune. I bought this blower for the future, not just the present.


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whipple1raptor

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That's pretty darn good for 17psi....but that's not even close to the sweetspot on that blower. 24+ psi or whatever is that blower rpm seems to be the point it goes completely bonkers with hp/tq. More of a head scratcher is how close the pump gas # is to the E85 number.....that does not make sense. There should be a bigger difference than 25hp. I would question the total timing on the E85 tune....bet it's lower than what is generally seen (22-23). Maybe the belt slip is that bad....but 17psi is so low, I'm not sure why the belt is slipping at all with that large of an upper.

You are not going to fly off the road with the stock brakes, not sure why you're so petrified of those lol. Unless you're auto x'n, half mileing or repeated 150+ mexico racing.....you're biggest problem will be how you control the throttle, not the brake. They will work fine for sane weekend cruiser. You could have the most capable brakes available for these cars and still fly the car off the road because of the right side pedal.

Pro tip - do not quote those crank numbers or people will get a chuckle.

I had a Shelby GT once.... Added a supercharger and when I was flying and couldn't stop the car with the stock brakes.... Ever since then, have always been Leary of adding power, but not upgrading the brakes.


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