Down pipes!!!!

[Dcchris311]

Hey everyone,

I'm almost done making the first set of downpipes that I'll be testing on my truck before I move onto production. I'm using GESI catalytic converter that are 49 state legal, sorry California people, Las Vegas isn't a far drive for y'all though. These are high flow, rated to handle 500hp per catalytic, so the system will be capable of supporting up to 1000hp. I honestly would move to catless downpipes once I got nearly 750-800hp mark. I'll be listing then at $1950 for the set, the catalytic converter are the biggest portion that contribute to the cost. Also the flanges are not an off the shelf part, so I'm having a friend who owns a CNC shop in California make them for me. When I launch them, I'll have a pre-order discount. I've also requested to become a vendor for the forum and I'm waiting to hear back.

 

[Mods_]

Sound test and expected install effort would be greatly appreciated!

 

[MJG406]

following

 

[gram10]

Hey everyone,

I'm almost done making the first set of downpipes that I'll be testing on my truck before I move onto production. I'm using GESI catalytic converter that are 49 state legal, sorry California people, Las Vegas isn't a far drive for y'all though. These are high flow, rated to handle 500hp per catalytic, so the system will be capable of supporting up to 1000hp. I honestly would move to catless downpipes once I got nearly 750-800hp mark. I'll be listing then at $1950 for the set, the catalytic converter are the biggest portion that contribute to the cost. Also the flanges are not an off the shelf part, so I'm having a friend who owns a CNC shop in California make them for me. When I launch them, I'll have a pre-order discount. I've also requested to become a vendor for the forum and I'm waiting to hear back. View attachment 14707

the "flange" at the cat to catback connection is an absurd design, I guess they made it that way in case things don't line up perfectly, but why they didn't go with a standard vband connection is beyond me.

 

[Dcchris311]

the "flange" at the cat to catback connection is an absurd design, I guess they made it that way in case things don't line up perfectly, but why they didn't go with a standard vband connection is beyond me.

Yeah, it's a formed "v-band" into the pipe, I was able to find the tooling for that but still a pain to remove.

 

[Dcchris311]

Sound test and expected install effort would be greatly appreciated!

I'll have some by this weekend.

 

[Scottie2Hottie]

Excited about this. Maybe modern vehicle ECUs are a different animals but my experience with turbo vehicles of the past, DP’s required a tuning adjustment. Curious if this affect A/F ratios.

 

[RonRHO]

It's ironic you're having a California shop make parts for a part you can't sell in California. Hopefully all that will change in the next few months.

 

[Dcchris311]

Excited about this. Maybe modern vehicle ECUs are a different animals but my experience with turbo vehicles of the past, DP’s required a tuning adjustment. Curious if this affect A/F ratios.

Im sure it'll be fine, Stainless Works has a set of down pipes for the SO engine. They didn't mention any tuning issues with it.

 

[Myers1981]

Im sure it'll be fine, Stainless Works has a set of down pipes for the SO engine. They didn't mention any tuning issues with it.

But if you do downpipes isnt the whole point to tune to get the benefit of better airflow? Just doing the bolt on i would assume wont pick up much power and will in fact change the a/f ratios enough to eventually throw a cell.

Don't get me wrong I think it's awesome and amazing the OP is building these I just hope eventually the rho has some good aftermarket support and ecu cracks tunes / downpipes / even bigger Turbos and transmission internals and tuning would be sick.

 

[Irongoats]

Wait, are you here in Vegas?