I remember when he challenged me to a Dyno contest. Results would be posted on the road and track forms circa 1995ish. first pull made 517hp. 7 more than any viper he had ever built at the time. No vipers dynoed that day. Later that week I bumped into the Terpstra brothers and they said John went back to his office to cry that day. good times....
2025-07-29 19:15:14
1
bsingletary78 :
Drove by on Thursday, the compound is full of trucks. Not sure what was going on.
2025-07-28 01:56:40
1
Monfuckintana :
Viper guy here, they used to steal motors out of cars coming in to fix the blown up motors in the shop.
Hennessey 650 I saw dyno at 530 whp
Hennessey 1000 dyno at 680 lol
he's always been a joke.
2025-07-30 15:38:12
0
cat crossing :
Hennessy was getting trashed on forums 20 years ago. Shocks me they're still even in business
2025-07-28 02:00:55
73
Cam :
Those looked like my pistons after the last tuner who did my jeep time ☹️😂 and how do you feel about the tuning school stuff? I have the hemi course, and have also been studying up on hp tuners forums 💯
2025-07-28 04:10:46
0
jerrittlong :
My boss owns a Hennessy mammoth and he barley gets to drive it that thing is always in the shop, no one should ever buy a Hennessy
2025-07-28 00:43:33
4
Gabe Garcia :
Are those Cast pistons? If so why would shops be building 1000hp packages and not do forged internals?
2025-07-28 04:13:32
0
Obtaining Greatness :
what's your opinion on Wengerd Tuning for ESS kits on 5.0s.. have read nothing but good about them
2025-07-28 01:14:48
0
Wes :
I’m also amazed they are still in business! That’s a big wow
2025-07-28 15:37:55
0
mizzoumark :
Viper customers knowing Hennessy is trash for 20 years.
2025-07-28 02:11:03
20
Duke City RideShare :
Yep!
2025-07-31 10:36:11
0
Jack :
Over for the owner 😂
2025-07-28 00:56:50
8
06subaruSTI :
Not only a relief hole but it shows that the piston ring is installed correctly. 😂😂
2025-07-28 01:06:03
3
John Fedor :
Good thing I was already Boycotting Hennessy. Cannot afford, great success.
2025-07-28 01:09:29
3
Davidthedove :
Who he call?
2025-07-28 03:57:37
0
jared_the_silverback :
They literally just throw boost and a sticker on 90% of the vehicles and charge 50k-100k for it…
2025-07-28 02:34:27
19
Jason Lowers :
Pepperidge farm remembers, and so do i😅
2025-07-28 01:15:57
6
Alex :
Relief hole in the piston 😭😂
2025-07-28 00:49:09
0
User8901 :
Hennesey is for people who want more power, have a bunch of money and don't know anything. It's all name recognition from 25 years ago. Saw a Hennesey Hellcat on vacation last year and my wife couldn't understand what I was laughing about.
2025-07-28 19:42:33
0
SPEED KILZ :
That’s not the first time we live seen that. HPJ had a henessey Gt500 in the shop not too long ago. There was a lot of bad stuff back in the day, on the viper forums, about parts missing off of cars 🤷♂️
2025-07-28 05:35:22
3
Mauldin91 :
passed a mammoth this evening. my stock hemi in a 2500 service truck scooted past it like it had a chute deployed 🤷♂️
2025-07-30 01:51:17
0
Aaronstevens207 :
It was more than one viper and it was a huge thing back in the day.
2025-07-28 01:10:14
4
⚜️-ṪḲ-⚜️ :
So learn and build my own unc?
2025-07-28 11:25:46
0
Vanilla Gorilla :
I remember that forum post to.
2025-07-28 00:44:10
6
WestCoast Cars&Coffee :
Hennessy has been known to be trash for way too long.
2025-07-28 21:56:17
0
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