sup all,

got a 2.1L all motor B-series. setup makes 263whp and 172tq and it is for drag racing. Ive tried a ported ITR intake manifold and it makes good power but the topend drops by around 8500rpm. I'm currently using the Edelbrock Victor-X. It loses alot of power compared to the ITR before 8000rpm, but i chose to stick with it because it carrys power to 9500rpm. Because of this, and along with the 4.785 final drive, i run a faster time.

Instead of trying these "off the shelf" intake manifold, i want to try a custom intake manifold. Im posting here to see if u guys have experience with companies such as magnus, bmc, endyn, etc or if u can refer me to a different company that can make me an intake manifold that can outperform the regular IMs and improve my setup with it.

ive also been considering kinsler ITBs, but have also heard that IMs can perform better especially if routed out the hood such as through the headlight or hood.

im open to any suggestions. Jus want to improve power and improve time if possible.

 

nice setup you have there - time for you to do some trial and error, there really won't be a clear cut easy answer for your intake manifold needs -- every engine will want something different -- my best piece of advice, spend some time and money and test some various options on the market -- only way you are going to know for sure what works for you

we ran a similar setup with a Gato Intake manifold - never had a chance to test any other options but always wanted to -- engine got changed to a K Series before we could get that far

 

i used to experience the same effect, even took it as far as comparing with ITBs...in the end, the best manifold to match the custom Endyn head I had was an Endyn intake manifold...you should try to give Larry at Endyn a call...however, I must caveat that his head work and manifold obviously complimented each other so you cant simply take his manifold and try against someone elses head work and expect the same results...his rpm band in his headwork and manifold went to around 9800rpm with very little loss in the midrange torque compared with other manifolds....i think my peak hp was 280whp on a 92mm x 86mm motor.

also the header needs to compliment the intake runner setup too

 

OP, have you talked to BMC Race? Talk to them, they can design one for your setup.

 

Ive been waiting on someone to ask these questions

 

How would you ever know if the runner length of your Gato or Elderblock is optimum for your engine/goals?

An ITB would give you the ability to try different things without cutting apart the manifold.

 

What about a Kinsler Intake manifold?

 

Do you understand why you where losing power with your set-ups?
The ITR is due to the Plenum Size, way to small and the Victor X's narrow power band is because of the runner size and length.
Since you drag race you are looking for something very specific, just need to know the power band. Maybe 7500-9500?
These requirements will help size the length of the runners and plenum size you will need.

My suggestion would be as follows.
At least a plenum 125% the size of your engine. Without knowing your compression ratio and fuel type that is a very rough number.
Tapered runners, runner length about 1" to .75" longer than the Victor X. Inside the manifold must have a velocity stack profile into your runners.
Two additional non-manifold items, ID Injectors and 3.5" intake piping maybe even 4”.

 

thanks for all the responses! I'll def. look more into Gato, and contact Endyn and BMC in the future, but for now , my goal is to hopefully get some experiences and feedback first hand from fellow drag racers, since I'm sure all the respectable companies/people will strongly believe in their own products.

my goal is not to design my own intake manifold. It is to find a person/company that have proven custom intake systems made for the All motor B, and they will be the one to decide what to do depending on what I need. For example, when looking for a custom header, by a company such as SMSP , I'll tell him my setup and goals, and he will design the header for me. I don't need to give him measurements , lengths, etc.

I'm also open to ITBs also, but it SEEMs for the B, the ITbs put power down on the dyno, but IMs especially vented out the hood, or headlight performs a little better at the track. This is obviously jus hearsay, I have no experience with ITbs at all.

 

B series platforms usually like a 8-12 liter box. Bmc is a great choice in manifolds but I'd suggest a Itb setup for a/m and make a plenum box and test different sizes. A 8" over all runner is a good start for a stout b series motor

 

get kinslers and never look back, if u go with twm u will probably end up needing kinslers if you wanna go bigger, so just bite the bullet i know kinslers are alot but you will more than likley never have to buy induction again

 

thanks, I might jus have to go with the Kinsler ITBs lol. is this more of the fact that ITBs perform better than IMs or Kinsler is jus a badass company with top notch designs?

 

Itbs are essential to maximizing HP.in any.am platform. Since it.is much easier to figure plenum sizing then.having to recreate another manifold

 

Kinsler and call it a day. With that kind of money Id buy something with real r&d, not no boot leg **** that blows up.

 

https://honda-tech.com/forums/all-motor-naturally-aspirated-44/profunction-kinsler-present-epic-all-motor-bseries-manifold-testing-2841539/


There is your answer to why to get some kinsler itbs

 

yea that looks like a big increase on the dyno, but it seems they didn't pick up much at the track. kinda like what I was assuming in my previous post. maybe it'll benefit a lot if they can somehow make an airbox , it'll perform even better?

 

.2 off your 1/4 mile time with only running good for half the track is pretty good if you ask me haha

 

hahha ic ic. anybody know where I can find a Kinsler dealer? or do I need to contact them directly?

 

Contact Luke @4piston or Mikey@ProFunction with a B series setup they know what Kinslers you will need.

 

contact TB Motorworx for info and kinsler to purchase

 

try king i have a heavily modified b16 manifold with there one design plenum and it is grate. talk to mike

 

updating this thread: I contacted Larry at Endyn and they only build manifolds for customers who are getting their Headwork or builds done there also. will contact BMC and Magnus next. I think I'll try out another manifold first before the kinslers to see the difference

 

Kinsler makes a plenum manifold as well, might want to look at that if you are planning on staying with a plenum manifold.

 

Definitely call Luke @ 4Piston! He's an awesome person to deal with.

 

For that money ill slap on a gt42x and never worry about airflow again. But I'm a FI kinda guy.
Good info in here wanted to post for future refrence