gains from bisimoto header on f22

[jdm92_accorn]

i recently seen a thread talking about the gain from a bisi header for a d16, they gained 6whp and 3wtq going from a rsr header to a bisi header. the d16 had a bisi lvl3 cam, 11:1's, ported head etc. given this is a modded d16 we also have a 2.2 liter vs a 1.6 so gains are to be higher. does anyone know the piping diameter or the rsr header?

[bcjammerx]

you know...has bisi ever posted dyno's showing the gains with header mod alone? I mean...bisi's a great guy and obviously knows his shit...400hp N/A..but still...i don't trust anyone. Would like to see comparisons of stock vs dc vs bisi's "F1 style" NOT just stock vs bisis's...thought that would suffice I suppose

[yardiexd40]

It would be nice to see any dyno proof of his product.

[civic_90_08]

What the hell do you guys think Joser has been saying the whole time?

you know...d112crzy.

yeah..

-Jordan

[93AccordLXwhite]

It's what I'm waiting for. Like the original poster said, yes Bisi is a great builder, history, roots, reputation; but I'd like to know what kind of bump I'd be getting from this vs. a CARB legal header (I'm in California). Plus, I'm sure the numbers would help justify the decision for the rest of the people on the fence and get us closer to the total number of buyers required for this group buy.

[jdm92_accorn]

i emailed hedi, ima see if she can get us some proof

[Shag Wagon]

Damn I love that header. But I want to see some numbers.

[robert@bisimoto]

We will post dyno charts as soon as we retrieve them from our database.

[JoshM]

We will post dyno charts as soon as we retrieve them from our database.

Charts of a completely stock F22a vs completely stock F22a w/ Bisi header?

[owequitit]

Charts of a completely stock F22a vs completely stock F22a w/ Bisi header?

It depends on what they have to test with... Do you know anything about how cars are dyno'd?

Having said that, a comparison against an F22 with X brand header vs the same engine with Bisi header IS a perfectly valid comparison, because it gives you a relative gain versus other products.

For instance, I believe the RSR header on a D16 was worth about 3-4HP on a stock D16 and the Bisi provided an additional 6WHP beyond that when built. So while it is impossible to say what it gained, relative to a stock engine, it is undeniable that it gained a significant amount of power.

[JoshM]

It depends on what they have to test with... Do you know anything about how cars are dyno'd?

3 of my last 4 cars have all been dynoed 2-3 times a piece. So, yeah, a little.

Having said that, a comparison against an F22 with X brand header vs the same engine with Bisi header IS a perfectly valid comparison, because it gives you a relative gain versus other products.

That'd be great too. I'd just like to see a dyno besides the pretty well built F22a that he posted a dyno of recently.

[owequitit]

3 of my last 4 cars have all been dynoed 2-3 times a piece. So, yeah, a little.

That'd be great too. I'd just like to see a dyno besides the pretty well built F22a that he posted a dyno of recently.

Then you understand that when prototyping peices they have to test what is offered to them.

How many completely stock CB7's do you suppose are offered up for testing on a product like this? And here is a more important question. How does the health of that stock CB7 factor in? What if it has 250K orginal miles and not the best maintenance? If it is an unhealthy car, people are going to say "oh that gain wasn't what I expected." You KNOW they will.

Either way, I am curious to see what he posts.

[JoshM]

What if it has 250K orginal miles and not the best maintenance? If it is an unhealthy car, people are going to say "oh that gain wasn't what I expected." You KNOW they will.

True. lol

Either way, I am curious to see what he posts.

As am I...

[d112crzy]

For instance, I believe the RSR header on a D16 was worth about 3-4HP on a stock D16 and the Bisi provided an additional 6WHP beyond that when built. So while it is impossible to say what it gained, relative to a stock engine, it is undeniable that it gained a significant amount of power.

And I've noticed these are the graphs he posts up, without ever letting people know that there were other mods done to the engine as well. I know because he has some graphs posted of a friend that has more work done to his motor, but bisi doesn't mention it. This makes everyone else think that the product alone(in this case, it was a cam) made that much of a difference.

He's made some crazy claims about his off-shelf D series turbo cam, and I know for a fact that it doesn't perform nearly as well as he claims it does.