$hawNPeeZyy

I just brought up the S2 v2 as some food for thought, since it seems to look promising on paper (they claim it was designed to compliment their supercharger kit.)

Appears to be similar to the Toda rep (as far as dimensions go), just has different pairing. Nonetheless, I know you are a very knowledgeable person and whatever decision you make will make some decent power.

Keep up the good work sir.

Frankacura

i never had so much dificulty to make my choice, But in my mind the Big Tube is good to make what i want, But i will not be able to track the car wit that hanging under the car and at PLM they CAN'T tell me the size of them own SP headers claming: I dont have instruments to take mesurements
so i have to buy a headers guessing the size ???

Frankacura

Is someone know:
if the PLM SP headers is 1 3/4 primary and staged as other that i saw,
Primaries = 43.3mm to 45.3mm to 48.8mm
4-2 collector = 48.8mm
2-1 collector = 51.8mm
Outlet = 65mm (2.5inch) ))
And Is PLM Toda Replica (TA) is the Big B18c one with about the same dimention ???

Frankacura

http://www.ebay.com/itm/Honda-Acura-B-Series-Drag-Race-4-1-SMSP-Exhaust-Header-2-5-Colector-B16-B18-B20-/161465309001?pt=Motors_Car_Truck_Parts_Accessories&fits=Make%3AHonda&hash=item2598151749&vxp=mtr

Frankacura

Toda B cams Dialed
In camgear 3.75 adv
Ex camgear 4.75 Adv

Frankacura

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$hawNPeeZyy

Have you decided on which header to get?

Frankacura

Hi
I did not take chance
I bought 2 different headers style
one PLM TA tri-Y
and
one PLM Bisi V2 4/1
But not sure that lots of people are interesting to hear about b anymore
Many myth will be busted here

$hawNPeeZyy

I have seen some dynos of the bisi rep and I am really not that impressed with it. On the other hand the PLM toda rep you have seems to do well on just about anything from 1.6L all the way up to 2.0L engines. But then again every engine is different so who really knows until you actually test both of them for yourself right?

Frankacura

Thats right
The bissi is suposed to be bit bigger, Its a big tube. colector is 2.65 on Real Bisi, but is the réplica is the same ??? will see

Till i got the new headers i did install my old Tri-Y Big tube just to make the start up and then start to ajdjustins AFR
If i have a chance i will go to the track and make some tuning 7 - 8000rpm
So as the TA will be installed and tune, maybe i will be able to notice different AFR from that TA...
wont be completly tuned with the Tri-Y but it can give an idear.
If i tune the Tri-Y 12.7:1AFR@7500rpm and that the TA make 11.9:1 it wont be good signe...

Frankacura

http://vid2.photobucket.com/albums/y...psucz7x8g8.mp4

Frankacura

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$hawNPeeZyy

Any dyno numbers as of yet?

Frankacura

My Dolly is still on top of the container for the winter
So i cant go to the track make the first adjustements
and the brake in to get the motor running good for the dyno
And before show to the dyno i want to make some test on differents headers Flow@8000-8500rpm and then make my header choice for the dyno.

$hawNPeeZyy

Cool man, the bisi rep should make more top end power. I remember seeing a dyno comparision of the bisi vs a hytech rep a while ago on what was basically a stock itr engine. Bisi lost a ton of power in mid range but gained a bit on top end. Here is the link: https://honda-tech.com/all-motor-nat...ction-2969367/

I am very curious to see how the toda rep and bisi rep perform on your engine since it is far from a stock itr.

Frankacura

Hy Thank you
I did read every post possible on every headers
The link that you give me for the Bisi headers power is to me a shame.
The type R will make over 185Whp on his nice stock OEM 4/1 headers
There is no way you will fill a Small tube Tri-Y header from an b18 engine exhaust flow, So forget about restriction in the big tube header even with the lower tubes smashed.
On a stock Type R, the header that will make best power won't be a big tube, The exhaust need velocity and that wont happen on a big tube headers and 200Whp
20Whp Gain from a tri-Y on a 1.8L engine is a shame to say.
My own LSVTEC did 203Whp R cams on Small tube tri-Y header. It would never ever make 220Whp on any other header. ( Don't you think the same ? )

Now my motor is completly other thing yesss.
Longer stroke
ported head and intake
and big cams, It will need a bigger exhaust systeme that an 1.8L engine,
I see lots of K24 on Tri-Y headers with the restrictor neck to 2 1/4" and they still make over 290Whp
And i dont see any dyno's from a big 2.1L B serie engine that make at least 260Whp to have an idear of what headers is able of what.
So by the tests that i'm about to do, i will be able to follow the AFR changements from an headers to another one, and see the one that will end up on my set up. Then go to the Dyno to see the AFR and timing curve that this motor want.

$hawNPeeZyy

I completely understand where you are coming from. You are correct that there does need to be velocity present in an exhaust system. I just wanted to point out that huge dip and I am curious if it will be present on a big engine such as yours, that is all. So far most power i've seen the toda header support was 260 whp which was on a 83.5x89, 13.8 compression, and pro 3 cams on race fuel (funny how it uses a 62mm tb just like you ). This is the dyno: https://honda-tech.com/all-motor-nat...ports-2883914/

Frankacura

My Toda Cams non vtec lobe want to make peak torque around this RPM point
so my torque curve may be way different from the type R at this point,
Yess people dont want to understand, he his making more power than 98% of other B engine but People are still installing 74mm TB trying to make 190WhP
A shop that sale you a 74mm TB claming that is good for your B engine is a bastard shop


Why are they so dum *** ??? Cuz they make 50$ on the 550$ throttle body and they dont want you to make near the power of them own race car so here is miss match parts for you !.