Ok first off let me say i have done enough research to make my brain hurt so dont come in here talking **** saying go on google and all that b.s

Now my questions are im looking to purchase a header for my
b16A the main one ive been looking at is the bisimoto v2 but im concerned it might be to extreme of a header for a simple B16 with minor upgrades i.e intake, tb, intake manifold port matched to tb, itr or skunk2 cams and valve train and a real tune not a base map....i was also looking at the rmf narrow one and hytec....i was on there website and it seems like it makes significant gains but the info on the motor isnt that good...im mainly looking for some thing that has good mid to high range gains

 

Toda

 

Logically, your research would have pointed you to the Toda as your best choice. The Toda replica should also be on your radar as well. Since the Bisi header is custom, you can always talk to them directly to address your concerns. The RMF narrow copy is your best shot in the dark option. You decide.

 

toda or replica toda.

i have a v2 on a b16a with i/h/e and its ok but lags big time until about 38-4k. after that its a beast. i'd love to test it against the toda on my car just to see how it feels. but i don't have another 1k to drop on a header right now.

 

Hello sir,
If you are looking for a quility custom header here is a little information of the Bisimoto Custom V2 header to help make a choice:

The Bisimoto V2 Custom header is a one off a kind header that is designed specifically for your setup. We would send you a spec sheet to fill to gather the information of what is currently in your setup and the header will be designed to extract the most amount of power of your unique setup. The way this process is achieved can be from different length primaries, collector size and a few other key points to make the header more efficient for your setup.

We do offer as well ceramic heat coating that will offer a power increase about 3-4% due to much lower under hood temperature as well as increase the thermal efficiency of the scavenging effect. Also the heat coating looks very cosmetically attractive being that it has a polished look.

For more information or pricing you can send me a pm

Records under Bisimoto Engineering header designs:

World's Fastest and Quickest B-series Pro: 9.7et, on Bisimoto Header

World's Fastest and Quickest B-series Street: 10.4et, on Bisimoto Header

World's Fastest and Quickest H-series Street: 9.98et, on Bisimoto Header design

World's Fastest and Quickest F-series Pro: 9.3et, on Bisimoto Header

World's Fastest and Quickest D-series Pro: 10.7et, on Bisimoto Header

World's Fastest all motor car: 152mph: on Bisimoto header

If interested on more info PM me or check out Bisimoto.com

Uncoated



Ceramic Heat Coated

 

thanks for the opinions guys i looked at the toda replica that spoolin performance makes...i think thats at the top of my choices right now

 

that toda header is a very nice header. Id love to have one if I wasn't so damn cheap. maybe some day

 

I'm about to pick up a toda replica from spoolin as well. Mikey from pro function just did a header comparison test on an 85x89 b series recently and he tested a real toda header among others. The toda held its own on such a big setup.

Obviously the $500 replica will not be the $1200 real thing, but based on others thoughts it should do pretty well.

While I love the design of the bisimoto, there is just to much **** you have to do to make it work. No power steering, no ac (not that I use it any way), half core radiator, it has a 2.75 inch flange. All in all your probably better of with the toda replica. Its been proven time and time over. Just my opinion.

https://honda-tech.com/forums/all-motor-naturally-aspirated-44/profunction-dyno-testing-report-headers-intake-manifolds-85x89-bseries-2924927/ Thats the link to mikeys test. You've probably already seen it, but it doesn't hurt to mention.

 

The B-Series Header is only compatible with power steering, but you are correct about the half sized radiator.

As far as the flange is concerned the size can vary from 2 1/2 - 3 1/4. This varies upon what would be the optimal design to extract the most power out of your application.

Good luck on finding the perfect header for your application. If there is anything I can assist you with, let me know and I will be more than happy to address any inquiries that you guys might have.

Cheers, Alvin.

 

Are you guys still having problems with welds on the primaries cracking or was that just with the early versions?

 

We have had no incidents regarding customers Headers cracking. Well at least not with the release of the version Two Header. Keep in mind if this has ever happened in the past, it is probably due to lack of proper installation which may include (but is not limited to..) additional parts such as flex pipes or even lack of proper installation procedures. That is why we always advise every one of our customers to have a trained professional to install our products. Either that or a local reputable muffler shop.

Also, if we are able to prove that it was indeed a manufacturing problem determined by our highly trained forensics team, our team and staff will do everything possible to make things right.

 

Do you guys recommend the use of flex pipes with all your headers? I feel like because of the extreme design, unless its installed with the correct components problems will ensue. Such as cracked welds.

 

To answer your question yes! You could not be more right sir. Bisimoto Engineering always recommends that a flex pipe is used in conjunction to our Header to dampen vibrations that cause damage to the Header. We have had previous customers in the past that actually have have had us source out those components and include them in the install as well.

Other things that could also cause this type of problem is header wrap. A big no no in our book. Which is we also offer ceramic coatings for an additional price.

 

Props to you guys for answering the questions. Thanks

 

I'd stay clear of the spoolin toda replica header, I was reading in a thread someone had one side by side with a Real Toda header and the primarys were different lengths different angels and not the same firing order, It look's alike in pictures I'm sure it will perform but not close to a Real Toda. Search the threads hard and you'll find the thread im talking about.

 

its a replica. its not going to be the same. it still performs very well for a b16.

even with a 2.75 opening it isn't too hard to get it all working.
woulda killed for a 2.5 opening though. saved me a little bit of work.

 

Thanks. We are here to help.