Rice Burner

Anyone have them? What are everyones thoughts on them? How much additional gain over 1 3/4"?

Got Me SOM

iTrader: (2)

Its recommended that you go with a 1 -3/4" header. 1 7/8" headers are for big strokers.

Although there are a couple people here running 1 7/8" headers on 346's. Not enough testing or data to warrant if they will lose power in low and midrange. Use the search and see what you find.

Bear

iTrader: (1)

I am running Kooks 1 7/8th straight headers on my 427. I have no idea if they would be good on a 346, I think not.

Rice Burner

TTT...Thanks for the knowledge..Anyone else know about em?

Z-Rated

Unless your car will see a HUGE shot of gas with that NX kit, I personally dont think that you need them. They are used for larger cube motors. Over kill for the 346.

Revelation222

Correct me if im wrong but if you put to large a header on a smaller engine (i.e. the 346) wont you lose a lot of low end torque? 1 7/8 are normally used for FI or No2 applications from what ive seen.

Rice Burner

Thanks a lot. 1 3/4" Kooks it is.

Nickn20

1-7/8s on my 422 1-3/4s should be fine for your little 346 hehe

AUSSIE TUNER

We have been using 1 3/4 on N/A 383(550hp@ flywheel) & 1 7/8 0n FI 347 (650 rwhp)I want to make some 1 3/4 try-y's for testing just to see if we can gain some mid range whilst retaining top end,I'm still yet to prove that the 1 3/4 4-1 are any better than 1 5/8 4-1 on a near stock engine (comparing mph).I would also like to try a narrowed down pro stock style collectors as well.Does anyone have any thoughts.
People might laugh at the idea of try-y's on the LS1 but even high rpm,high output 160 hp/litre motorcycles have gone that way now,maybe a better torque curve is achieved overall.

Cheers Glenn

WILWAXU

iTrader: (6)

Just to muddy the waters a little

I have 1 7/8's mid length Whisper headers on my Stock Internals car.

With the big stall and high rpms that this car runs, the big tubes don't seem to hurt it.

Jabroni

Me neither. I don't percieve a loss down low at all and I'm far from heavily modded. I went 1 7/8 because I didn't want to buy headers again when I went with a stroker later on.