remove rib in exhaust manifold?

[boosted 96 eclipse]

If i remove the rib in a 2g t25 stock manifold will i benefit from it? Or would it be a waste of time?

 

[hubz91talontsi]

If youre looking for improvement port the entire manifold and swap the turbo with a 14b

 

[bryanwheat]

With a t25 you likely aren't going to notice much porting the manifold. By rib what exactly are you talking about? Are you talking about the divider in the collector area?

 

[Spyderman7]

I dont think it will help because it helps direct the exhaust flow.You just want to port it and open it up a little.

 

[Kyle_T]

Dont get rid of it.

You can knife edge it, but then it will be more prone to cracking. Like this:

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[Fehrion_sit]

If youre looking for improvement port the entire manifold and swap the turbo with a 14b

^^^ FP makes a cast manifold and this pretty popular, might be worth your time and money to invest in that.

 

[Lou98GSX]

do not get rid of the divider you will have problems at higher rpms . fp manifold doesn't have it because there runners are designed more like a tubular manifold that direct the exhaust gasses straight down to the turbo. the stock manifold runners are more straight and need that divider so that the exhaust gasses don't slam into each other .

 

[fierosail]

Dont get rid of it.

You can knife edge it, but then it will be more prone to cracking. Like this:

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i had bad luck porting mine like this and cost me a turbo. The dumb divider busted off from a crack and well u can guess the outcome

 

[Arcangel2501]

man i would trash it and pick up a force perfromance one there pretty cheap and work great i ran one and made 600whp i went to a STM and love it more

 

[cnordelo]

If you are looking for a budget power increase pick up a cast 14b manifold and a 14b. You can even upgrade to a 16 down the road. That's what i did. Don't mess with the t25 or manifold. Just my opinion

 

[bryanwheat]

If you are looking for a budget power increase pick up a cast 14b manifold and a 14b. You can even upgrade to a 16 down the road. That's what i did. Don't mess with the t25 or manifold. Just my opinion

The 2g manifold, is better than the 1g manifold and FAR less prone to cracking. I think this might be the first time that I've heard of anyone telling someone with a 2g to throw a 1g manifold on there. The 2g manifold has the same flange as the 1g, so you can use a 14b or 16g on it also.

man i would trash it and pick up a force perfromance one there pretty cheap and work great i ran one and made 600whp i went to a STM and love it more

The stock ported 2g manifold is more than 90 percent of people on here need. Upgrading to a fp manifold is just a waste of money if you aren't running a bigger turbo and other mods to take advantage of it.

 

[jpmxrider489]

The 2g manifold, is better than the 1g manifold and FAR less prone to cracking. I think this might be the first time that I've heard of anyone telling someone with a 2g to throw a 1g manifold on there. The 2g manifold has the same flange as the 1g, so you can use a 14b or 16g on it also.



The stock ported 2g manifold is more than 90 percent of people on here need. Upgrading to a fp manifold is just a waste of money if you aren't running a bigger turbo and other mods to take advantage of it.

I went from a 2g mani to the fp one and I love it. I didn't notice a big difference but I would do it all over again. I also have a 16g.

 

[boosted 96 eclipse]

I hopped on the classifieds on here and picked up a tubular manifold for $70 and i love it so far. Thanks for the great input though.

 

[boosted 96 eclipse]

Ok so the ram horn manifold sucks!! My boosting doesn't seem as hard as it was with the stock mani. So I'm gonna switch back until I get the money to get a FP mani.

 

[Breezio69]

For $70 I'm going to guess its an ebay manifold, and its already cracked at the welds... hence losing exhaust pressure, which means losing boost.

 

[LandSpeed-DSM]

I maxed a 59mm compressor on a ported 2G manifold.. divider left in place.

Not to say the FP unit isn't better or worth it, but if money is tight you have another option.

 

[nitrouskris]

Ported my Brother 96 GSX Manifold knifed edge and gasket match it in 96 and it is still on the car today without any problems. Every little bit helps.

 

[Bud92gsx]

The 2g manifold, is better than the 1g manifold and FAR less prone to cracking. I think this might be the first time that I've heard of anyone telling someone with a 2g to throw a 1g manifold on there. The 2g manifold has the same flange as the 1g, so you can use a 14b or 16g on it also.



The stock ported 2g manifold is more than 90 percent of people on here need. Upgrading to a fp manifold is just a waste of money if you aren't running a bigger turbo and other mods to take advantage of it.

Just to make sure this hits home Im quoting you.Like said 90% of the people on the site can get away with the stock or ported 2g manifold.It's been proven to make 400+..How many of us are making that power on a 14b,16g? Exactly .

Id get rid of the t25 and do a 14b swap, with ported 2g manifold and ported o2 housing.Why ported and not replaced.Because again whos making 400 hp on anything less than a 20g, not many, and please dont show me links of people that have,I know it's been done.

 

[4G63gst1990]

You could also do a evo 3 manifold and either port it or leave it alone

 

[boosted 96 eclipse]

It must have been an FakeBay one. Oh well live and learn. I have a 16g waiting to be put on the car I am looking for a injen intake and better fuel pump. But yeah the stock mani is definitely getting put back on. I already welded up three cracks and a pinhole on the ram horn and just found another crack in runner four. So just port the stock mani and what about the stock O2 housing? Or should I just upgrade to a ss o2?

What kind of carbide bit do I use to port?

 

[WES_393]

I would just go with an SS o2 housing if you can. I've had good luck with eBay SS o2 housings. They don't experience nearly as much heat and stress as the manifold does, so naturally their less prone to cracking.

 

[Bo0sTdTsI]

Id get a 7cm housing, but you can port the stock one I don't know much about that so I just went with a 16g and the 7cm housing I found laying around, and a evo3 exhaust manifold from road race. For 12 psi it boosts pretty hard with my mods I have up to date.

 

[boosted 96 eclipse]

Wes_393 your talon looks sick! Sorry a little off topic. Ok I will give a eBay ss o2 a shot and port the stock 2g mani. Would I have to port out the inlet to the hot side of the t25 and 16g?

 

[WES_393]

Wes_393 your talon looks sick! Sorry a little off topic. Ok I will give a eBay ss o2 a shot and port the stock 2g mani. Would I have to port out the inlet to the hot side of the t25 and 16g?

Thanks for the compliment.

For what it's worth, this is the "brand" (for lack of a better term) housing I've had the best luck with. Both recirculated and open dump. Click. If your on a bit of a budget, they're usually about 1/2 as much in the classifieds.

And yes, it's usually best to "gasket match" the manifold outlet and turbine inlet. Basically just trace the gasket opening and port it that far. Porting the wastegate port and flapper hole can help with boost creep (for 16g).

Unless you mean port the O2 housing. In which case no, you shouldn't have to port the SS housings. There's not much to grind away anyways.

 

[boosted 96 eclipse]

Not a problem!

ok i will check into it for sure.

is it worth porting the wastegate on the t25? off topic can i run stock injector's with the 16g?

ok yeah thats what i was curious about. i will leave it alone.

which is better open dump or recirculated?