2.75" vs 3" pipe on supercharged vehicles.

Nut_N_Much · 07-28-2013, 05:43 PM

Would you be interested in a full 3 inch FI system ? I have one that just needs tips.

Man you have really crunched numbers.. I wish I could add to this but my experience is from watching or building an exhaust because the Teams Engineer wanted it that way. Tom would say the back pressure helps with the torque curve. Not enough gave high HP but lower torque numbers. Those were naturally aspirated V6 & V8 engines.

SS_Firehawk · 07-28-2013, 05:53 PM

Quote:

Originally Posted by Nut_N_Much

Would you be interested in a full 3 inch FI system ? I have one that just needs tips.

Man you have really crunched numbers.. I wish I could add to this but my experience is from watching or building an exhaust because the Teams Engineer wanted it that way. Tom would say the back pressure helps with the torque curve. Not enough gave high HP but lower torque numbers. Those were naturally aspirated V6 & V8 engines.

Lol what happened to the tips?
Resonators?
The exit diameter of my LTH's are 2.5", not sure if running 3" will make a diff over 2.5". Might flow too well for the SC's to get into it's efficiency range. I'm walking a tighrope of providing enough flow, but not to the point where it's detrimental lol. I think my current exhaust will be great till about 6500-7k rpm, if power starts dropping off, I know for sure it's the exhaust. The stage 1.5's and stage 2 SC's keep pulling till redline with torque staying flat, even rising slightly.

Nut_N_Much · 07-28-2013, 07:37 PM

Quote:

Originally Posted by SS_Firehawk

Lol what happened to the tips?
Resonators?
The exit diameter of my LTH's are 2.5", not sure if running 3" will make a diff over 2.5". Might flow too well for the SC's to get into it's efficiency range. I'm walking a tighrope of providing enough flow, but not to the point where it's detrimental lol. I think my current exhaust will be great till about 6500-7k rpm, if power starts dropping off, I know for sure it's the exhaust. The stage 1.5's and stage 2 SC's keep pulling till redline with torque staying flat, even rising slightly.

Had to make the tips fit the Zele Kit. Its non-resonated 3 inch. That car now has a Zele Exhaust on it.. I'm supposed to pick it up this weekend but I had to go out of town. I intended to put FI tips on it and sell it. Would be a lot easier and cheaper to just sell as is. I wanted to install it on mine but I don't make enough boost to justify a 3 inch, I would loose HP with it.

Holy crap thats a huge oil cooler..

SS_Firehawk · 07-28-2013, 08:07 PM

Quote:

Originally Posted by roplusbee

I like the fact that you are actually doing your own research and not just blindly listening to what a manufacturer/builder is telling you. Since GTM is doing the work, you could have then test it with one of there 2.5" or 3" systems. That would give you a good indication of what you want without having to take a hit.

I appreciate the advice. I'm not sure if they keep their exhaust systems on the shelf. But I did ask them to do a comparison between the HFC and resonator on my Y pipe. If there is no change, the Tanabe is my restriction point. If there is a change, is the exhaust still holding back top end performance? It's all theory and speculation now until I see roller results which hopefully is in the next week or two.

Quote:

Originally Posted by Nut_N_Much

Had to make the tips fit the Zele Kit. Its non-resonated 3 inch. That car now has a Zele Exhaust on it.. I'm supposed to pick it up this weekend but I had to go out of town. I intended to put FI tips on it and sell it. Would be a lot easier and cheaper to just sell as is. I wanted to install it on mine but I don't make enough boost to justify a 3 inch, I would loose HP with it.

Holy crap thats a huge oil cooler..

Ah, yeah I remember seeing that post. It was a good buy. But yes, you will lose some bottom end with that exhaust. Can't go wrong with 3" and turbo, not so much with SC's. Maybe on a built motor and using C30-94's lol.

Lol, yes, that oil cooler is pretty beefy. I hate to get rid of it

The real trick is finding it a new home that will put it to good use.

07-28-2013, 05:43 PM	#1 (permalink)
Nut_N_Much A True Z Fanatic Join Date: Dec 2011 Location: Pensacola Florida Posts: 1,696 Drives: Awesome Car Rep Power: 27	Would you be interested in a full 3 inch FI system ? I have one that just needs tips. Man you have really crunched numbers.. I wish I could add to this but my experience is from watching or building an exhaust because the Teams Engineer wanted it that way. Tom would say the back pressure helps with the torque curve. Not enough gave high HP but lower torque numbers. Those were naturally aspirated V6 & V8 engines. SS_Firehawk likes this. __________________ Did new cool science stuff to the car !!! http://www.the370z.com/mazoc/99606-z...y-14-17-a.html http://www.the370z.com/diy-section-d...-w-videos.html

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