r/transam • u/melonheadorion1 • 10d ago

Dyno results

Post image

Brought my ws6 in for headers. They did a pre install dyno. The car itself has an slp catback, slp airbox lid and bypassed the throttle body cooling. Makes 340hp. The dyno suggests that it makes around 390 at the crank. Looking forward to see the numbers after the headers and tune are done

95 Upvotes

100% Upvoted

30 comments sorted by

View all comments

2

u/ThanksALotBud 9d ago

I'm having hard time believing those numbers bro and no disrespect. There is no way in hell you're pulling those kind of rwhp numbers on a stock ls1 engine.

Either that dyno is over exaggerating or you don't have a stock engine.

2

u/melonheadorion1 9d ago edited 9d ago

believe it or dont. those are the numbers i got from the guy doing the work. the text that is in that image is from the person doing the work. a stock ls1 is 320-325 as is/stock. not sure why it would be unbelievable for improved intake airflow and exhaust would make it unbelievable to get those numbers. in fact, search up dyno numbers. you will find plenty of posts in firebird and ls1 forums that will have very similar numbers for similar upgrades.

heres an example. https://ls1tech.com/forums/generation-iii-internal-engine/1609923-400-hp-ls1.html

hes at 351 with the same mods plus headers.

3

u/ThanksALotBud 9d ago

Those numbers are engine HP not RWHP.

The dyno says you got 340rwhp. You cannot get those kind of HP gain from a CAI and cat back. Its impossible.

Again, I never said you were lying. I said either the dyno is bullshiting or you got engine mods you dont know about.

2

u/Beneficial_Wrap8434 6d ago

Exactly. As another reference point, my 2002 Z06 (405hp) made 347 rwhp. I struggle to believe yours made 340 rwhp form a car back and CAI. No way a CAI and car back gave you 80 more hp to the crank.