jdragon1974

So i got my new Toda Rep Header in yesterday. Special thanks to Chris at CR1 Motoro sports for hooking me up. So I have been having issue with my build thinking it was cams or something like that. Well jacked up the Integra and looked at the crappy setup I currently have for exhaust. So dc 4-2-1 header to a crappy weld job Pics Below. I pretty much think this is the issue with tuning my car with the Blox Type C cams lol.





Here is the new setup going on today.

2LEM1

iTrader: (1)

Do you have a 'before' dyno with the DC header? I'm curious to see the difference this makes with some decent sized cams.

jdragon1974

no I dont , the only dyno I did was right before i had blew the head gasket. It was lik 130 hp and 200 torq..lol it was weird.

2LEM1

iTrader: (1)

Ah yeah I just saw your other thread. That exhaust is certainly choking the motor... IDK about 60whp though haha. When you put the header on I'd personally tune it open header just to make sure the cams and motor are ok. Then put the exhaust back on.

One of my buddies lost something like 30whp going from open header to a Apexi WS.

jdragon1974

dammm, yeah I'm running the blox type c cams, they run fin till vtec, but I'm thinking this might be one of the problems plus pretty big exhaust leak. Still need to get some rdx injectors

2LEM1

iTrader: (1)

What injectors are you running? These cams like a lot of fuel at the crossover.... that could be an issue.

93egSLEEPER

I think I mentioned the fuel system in an older thread awhile back. IMO he needs bigger injectors, a fuel pump and more pressure to feed that thing

Love the exhaust, hate the performance. I lost 13whp and torque all over w/ my WS2 on a MILD 1.8.

When I was boosted I wouldn't build full boost w/ it on (built 12psi w/ a 1bar spring)...that's a bad sign. Open pipe it would peg 1bar (14.5psi) by 4200.

Open header/downpipe it was a totally different car.

jdragon1974

yeah I had rc 440 injectors, bloc fpr and walbro 255. I dont think fuel was an issue to be honest. I sold the rc 440 and going to get the rdx 410

2LEM1

iTrader: (1)

Naw that's the same setup I have... 440 RC, walbro 255... it's plenty for this build. The RDX injectors will work too, but I woulda just kept the RCs.

jdragon1974

Thats why I'm thinking the bottle neck I have in the exhaust that old crappy cat that is gutted and dented to hell and crap weld job its like 2.25 to the stock gutted cat then it goes to 2.50 back to exhaust 26"resonator

93egSLEEPER

Alright I couldn't remember what you said you had. That should have been more than plenty. It's just doesn't make sense...exhaust won't be THAT drastic. I've seen some impressive builds on 60mm exhaust.

jdragon1974

Only thing I can think is the cams are bad..lol will see. going home to put exhaust on now..I will post results.

m4xwellmurd3r

That flex pipe could have collapsed internally. That could explain why you had such hogh torque with such low hp

J.Berta

The Toda rep is very restrictive. It was choking my engine severely! I modified mines and have no issues now. Took that stupid pipe reducer and bend out and replaced the whole tail piece with 2.5" stainless.

koczeka

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jdragon1974

yeah I like that, I have not installed it just yet, started raining so going to do it tomorrow,

J.Berta

My car was already tuned with jdm style DC 4-1 header. At the time that all that could be provided. But later I purchased the Toda rep thinking what you said about it being proven to make power. Upon install, went for a ride. My af went thru the roof with how rich it was. It was bogging thru the rpm range! Especially in the mid range. And a good bit on topend. Had to drive the car for several weeks until I got the pipe and everything situated. AF back around 12.9... I still stand behind what I did. It rips thru the rpms and feels a ton better. Going to be a bit before I get back to the dyno, but have plans to go back to see.

GagnarTheUnruly

iTrader: (3)

I would not do that without some back to back proof it helps. The toda rep is known to make as much power on a b18 as any other header on the market. Bigger is not always better and butt dynos lie.

allmotorpackage

interesting mod after the choke ...

2LEM1

iTrader: (1)

It's a worthless mod without before and after dyno charts.

For all we know he lost power.

A 'butt dyno' is a ******* joke.

Runnerdown

Take a close look at that flex joint on the inside. Some of those have mesh that collapses and will reduce the diameter down to a tiny opening. This will murder power on the high cam.

J.Berta

As I stated before, my af went retarded rich from just bolting this header on. Never seen a single modification make more power from making the current setup super "rich". Datalogs showed it being a lot richer throughout the rpm range. It definitely isn't a worthless mod to me.
Oh by the way, I'm so sorry I don't meet your requirements of data results besides what I could tell you of my datalogs. I'm sure you have had one of these headers before since you seem to know everything about it.

2LEM1

iTrader: (1)

That means it lost power genius.

If it made power it would want more fuel and run lean.

92cxturbo

His point exactly, genius

J.Berta

The untouch/unmodified/brand new out of the box Toda Rep made it rich not lean. Reread everything!! Lol