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Max boost for a Hellcat crate Engine #3101004 12/09/22 11:54 PM 12/09/22 11:54 PM
Joined: May 2004 Posts: 12,385 Taxes & Virus's R-US, NY Dragula OP I Live Here
Dragula OP I Live Here Joined: May 2004 Posts: 12,385 Taxes & Virus's R-US, NY	What is the max boost a Hellcrate will tolerate over the long haul... '70 Cuda,...605 EFI Hemi Street Car (6.20 best pass, 1.33 60ft) https://www.youtube.com/watch?v=WYw6RA-k5Bk (6.25 at 108.75mph from inside car) https://www.youtube.com/watch?v=3zQEb9uxFng (6.25 at 108mph from outside car) https://www.youtube.com/watch?v=JCvfzsC4NgM (9.9) '66 Barracuda AWB Stretched nose Blown 440 Car in build stage '71 Duster Drag Car 400 Low Deck 512 best 6.002 at 115.44mph https://www.youtube.com/watch?v=Znuo3jMUXTk

Re: Max boost for a Hellcat crate Engine [Re: Dragula] #3134794 04/03/23 02:48 PM 04/03/23 02:48 PM
Joined: May 2004 Posts: 12,385 Taxes & Virus's R-US, NY Dragula OP I Live Here
Dragula OP I Live Here Joined: May 2004 Posts: 12,385 Taxes & Virus's R-US, NY	You guys are the Tech damit.... '70 Cuda,...605 EFI Hemi Street Car (6.20 best pass, 1.33 60ft) https://www.youtube.com/watch?v=WYw6RA-k5Bk (6.25 at 108.75mph from inside car) https://www.youtube.com/watch?v=3zQEb9uxFng (6.25 at 108mph from outside car) https://www.youtube.com/watch?v=JCvfzsC4NgM (9.9) '66 Barracuda AWB Stretched nose Blown 440 Car in build stage '71 Duster Drag Car 400 Low Deck 512 best 6.002 at 115.44mph https://www.youtube.com/watch?v=Znuo3jMUXTk

Re: Max boost for a Hellcat crate Engine [Re: Dragula] #3134810 04/03/23 03:28 PM 04/03/23 03:28 PM
Joined: Feb 2022 Posts: 1,174 Nor here, Nor there D Dart 500 super stock
Dart 500 super stock D Joined: Feb 2022 Posts: 1,174 Nor here, Nor there	Is that just a stock hellcat crate engine? I'd go talk with the hellcat guys and see what boost they're running. I know there is a super simple way to get another 150hp out of them, all depends what you want to do

Re: Max boost for a Hellcat crate Engine [Re: Dart 500] #3136227 04/07/23 01:26 PM 04/07/23 01:26 PM
Joined: Aug 2008 Posts: 69 racine,wi 7 70gtx1 member
70gtx1 member 7 Joined: Aug 2008 Posts: 69 racine,wi	From what Ive personally seen, guys that run into trouble are running the 10 percent lower pully, and the smallest upper pulley you can get. Know a few guys that had their blowers explode from being spun to fast with that combo. Once you get around 16 psi, fuel starts to be an issue, and you have to consider e 85.

Re: Max boost for a Hellcat crate Engine [Re: Dragula] #3136985 04/10/23 03:00 PM 04/10/23 03:00 PM
Joined: Oct 2013 Posts: 30 Bowling Green, KY B BlakDak71 member
BlakDak71 member B Joined: Oct 2013 Posts: 30 Bowling Green, KY	I ran a 2.79 upper pulley (17-18psi) on mine on 93 for a couple years with no issues. I switched it to E85 and ran the hell out of it for a couple years before eventually breaking two piston ring lands. Trapped 140mph with a 6 speed at 4000lbs race weight though lol

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