Fbo whp question
 

I was talking to a local known tuner who I asked what kind of gains will my 2022 gain from lt2 manifold, headers and e85. He said stock is around 370-390 with my nods should be around 430-440 does this sound right? I’m assuming he has a mustang dyno.

Stock is about 395-405 to the wheel, with your mods 460 to the wheel.. with a tune of course.

This.

I have Rotofab intake, Kooks headers with cats, and Flex-fuel/E85 kit.

Headers in particular really allow this LT1 engine to breath. Extends the power and torque in the upper RPM's in particular so that they don't drop off nowhere near what the factory manifolds do.

Well I was told my car dynoed higher than MOST with the MODS I had but I was at 480HP 485TQ with 2 inch Kooks Headers, E85, LT2 manifold, lt5 throttle body, ROTOFAB and Magnaflow axle back.

If you isolate just the E85 mod, that makes about 30-35 HP by itself. The LT2 manifold made about 20HP, the exhaust made about 20HP, and the ROTOFAB maybe 15HP. The MORE impressive aspect though is that the torque curve is VERY FLAT which results in a VERY broad power range. STOCK the car (2019 SS A10) dynoed right at 400HP.

A note about tuners. The VERY BEST of them can produce repeatable results in that if they modded 10 cars with the very same MODS, the power gains should be within 5-10HP of each other assuming no underlying issues. The better ones also typically UNDER estimate the anticipated power gains . There are even a few (VERY FEW) that will mod you car and validate the results by taking your car to the track and producing the numbers they committed to. You should ask to see dyno charts of some of the cars that they have modded as a verification of the power gains if you have any concerns about that.

few things

headers gain virtually nothing on a bolt on car. dynos read whatever the operators want them to, verify gains on that particular dyno. those mods should consistently gain ~60 whp.

Ah ok. I this is my current parts list that I have just waiting couple days off to install everything. 2” headers with x pipe from speed engineering, lt2 intake manifold, and e85. I still don’t have a roto fab. Adding a roto fab will increase my whp by 10ish? I even got a wideband because I was thinking of going remote tune by pray or gpi. But not I’m not sure my local tuner can squeeze out the extra whp since he said they make 430-440 with my mods lol but I won’t see how much whp I’ll get from pray or gpi lol

Yea I think that’s why he said I should be around 430-440 whp. My question is how would pray know what whp I’ll be getting? Or is that like out the window for remote tune? Whats your take on gpi?

ive seen several cars on here gain almost nothing going from manifolds and cat deletes to long tubes. there's one just recently in the drag racing section. i think he picked up .2 mph on a car that was already trapping over 100 mph in the 1/8. brandon hills car did the same thing years ago.

WTF? Plenty of examples out there of an SS gaining 15~21 hp with long tubes and high flows.

perhaps the gains on the dyno don't amount to anything at the track, but there are several threads here regarding this matter. i think the gains are from removing the stock cats, not the install of headers.

ftr fluke. the cars i'm referencing are not stock. they are head and shoulders faster and more modified than our cars. they are already tuned, they are cars and guys that race and have raced A LOT. theyre comparing stats you've never heard of and weighing parts you didn't know existed. i'm not talking about joe blows bolt on car that traps 118 mph with "475 whp".

everyone is entitled to their opinion. i'm basing mine on information from guys who race cars.

edit: spend some time racing on the street. youll quickly realize that dyno numbers don't mean a whole lot given the difference in dynos, tuners, cars and drivers. one should be looking at end performance, not a number.

Fair enough but he said she said, isn't evidence. Numbers can't be argued. Do all dynos lie, absolutely not. Do some of them lie, definitely possible. But blanket statements don't mean jack tbh. I want to see your racer buddies explain how my car pulls 85 hp at the crank with just E85 since pretty much ALL joe blow parts mean absolutely nothing.

Show some numbers and parts these so called racers have and we'll see what the rest of the community here thinks.

You never specified anything, you made a blanket statement anyone with google-fu could argue.

Why not ask some of the 700-1000 rwhp guys on here see what they think.

I mean obviously don't take my word for anything, I'm still new to this and only have 459 rwhp with just E85. Paid $3500 for that E85 mod too. I should edit my signature so I'm not lying shouldn't I? I think I will.

@OP, forget everything I said just listen to s346k.


As s346k explained to me: I am completely stock

https://i.imgur.com/dE2GEoP.jpg

Not amount to anything at the track? Check out the fast list #3 for bolt-on SS LT-1 engine. The quickest cars ALL have headers. Best one with the only exhaust mod being cat deletes is Brandon's 10.87, and best one with the all-stock exhaust system is my 10.88 run. Pretty clear that headers are a benefit on the track.

As far as just removing stock cats, one guy who did the CA primary cat deletes and tuning gained 10.75 hp. Later on, he installed long tubes with high flows, and the car gained ANOTHER 17.15 hp.

Go ahead and tell us that you have no idea what your talking about without telling us that you have no idea what you’re talking about.