Is this power achievable with this build ?

[seely]

Looking to make around 720-740hp+

Planning to install the whipple 2 on a 2019 GT (extra parts would be OPGs , oil pump and clutch) Hoping to keep everything else stock and have it tuned for 91 octane and make that much power with safe amount of boost.

I've followed a few builds that make over 700 run 91 but they also have upgraded exhausts.

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[wazslow]

700 at the crank, or 700rwhp? I wouldn't be comfortable north of 700rwhp on 91 even though some do it.

 

[seely]

700 at the crank, or 700rwhp? I wouldn't be comfortable north of 700rwhp on 91 even though some do it.

HP not RWHP. why do you say this ?

 

[DougS550]

I think he said that was, 700 Crank Shaft Horse Power is close to 70-80 Horse Power "LESS" than 700 Rear Wheel Horse power. Crank HP is measured at the Engine crank by manufactures, Rear Wheel Horse Power is measured at the rear wheels to the ground. Good Luck

 

[wazslow]

HP not RWHP. why do you say this ?

Most guys who have hurt motors are north of 700hp and are running pumpgas. E85 is significantly safer.

 

[Cory S]

With 91 octane and a splash of octane booster to bring it to about 94-95 octane, you could see 680-710whp with 16-18° of spark advance.

 

[Vert]

It's doable especially if you go catless with a oct. booster.

 

[engineermike]

On straight 91, I don’t think it’s possible due to knock limits. In fact, I don’t think it’s likely even on 93 due to knock limits.

 

[Jackson1320]

Why 91 octane?

 

[seely]

Why 91 octane?

because there's completely no 93 in my area

 

[bloomerfan]

Most guys who have hurt motors are north of 700hp and are running pumpgas. E85 is significantly safer.

I don't think you will be able to find E-85 in 5 years....already pretty scarce in some states. JMO

 

[wazslow]

I don't think you will be able to find E-85 in 5 years....already pretty scarce in some states. JMO

Already scarce here in SE PA where I am. I drive 15 miles each way to fill up and I fill up additional containers too. I wouldn't be able to do it if my car were a daily driver.

 

[seely]

I think he said that was, 700 Crank Shaft Horse Power is close to 70-80 Horse Power "LESS" than 700 Rear Wheel Horse power. Crank HP is measured at the Engine crank by manufactures, Rear Wheel Horse Power is measured at the rear wheels to the ground. Good Luck

On straight 91, I don’t think it’s possible due to knock limits. In fact, I don’t think it’s likely even on 93 due to knock limits.

With 91 octane and a splash of octane booster to bring it to about 94-95 octane, you could see 680-710whp with 16-18° of spark advance.

Most guys who have hurt motors are north of 700hp and are running pumpgas. E85 is significantly safer.

I thought a lot of people were running over 700hp+ with 91 octane, whipple and exhaust?

for example, https://mustangforums.com/articles/building-an-850-hp-s550-mustang-far-easier-than-you-might-think/

 

[Vert]

If he wants 700 out of the motor and not the wheels it's shouldn't be an issue. That's around 600whp.

 

[engineermike]

I thought a lot of people were running over 700hp+ with 91 octane, whipple and exhaust?

for example, https://mustangforums.com/articles/building-an-850-hp-s550-mustang-far-easier-than-you-might-think/

Read the fine print. He didn’t say it made that ON 91, just a 91 tune. I would go out on a limb and say the vast majority of pump gas numbers you see over 700 are using some form of octane booster. They are extremely effective. On true pump 91 and 93 mid-upper 600’s is much more common.

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