I Donated thefultonhow Posted May 9, 2013 I Donated Share Posted May 9, 2013 HTA68 JE pistons can't remember the compression ratio.....I did up it Minor details... TRSCobra essentially went from stock exhaust to open downpipe (e-cutout on downpipe) and gained 58whp. Not sure what else he was running. Link to comment Share on other sites More sharing options...
700watts Posted May 9, 2013 Share Posted May 9, 2013 PM me when your ready.....Racer-x helped me out with a few tuning issues when he came to the east coast... so it's all good Link to comment Share on other sites More sharing options...
700watts Posted May 9, 2013 Share Posted May 9, 2013 So you're running the stock VF40, right? It's really pointless to say that without knowing what your other mods are... by the way if you notice...you got me being a little liberal with my numbers... Link to comment Share on other sites More sharing options...
Brett Posted May 9, 2013 Share Posted May 9, 2013 Minor details... TRSCobra essentially went from stock exhaust to open downpipe (e-cutout on downpipe) and gained 58whp. Not sure what else he was running. with the flick of a switch?? i didn't feel much difference from stock to open dp Link to comment Share on other sites More sharing options...
robinlsb Posted May 9, 2013 Share Posted May 9, 2013 that was straight from a tuner. the guy knows what he's talking about Except a stage II tune is NOT 20psi. If you run 20 PSI, prepare to replace the iC. Furthermore, trying to get 20 psi out of a stock VF40 is crazy. let alone the waste gate issues. You MAY get 20 psi at a certain point, but once the Turbo reaches a certain RPM , it will cavitate, which has NOTHING to do with back pressure. "Belief does not make truth. Evidence makes truth. And belief does not make evidence." Link to comment Share on other sites More sharing options...
Brett Posted May 9, 2013 Share Posted May 9, 2013 i have a vf46... but i only got 16.9psi when i had my dp and ap. Link to comment Share on other sites More sharing options...
700watts Posted May 9, 2013 Share Posted May 9, 2013 with the flick of a switch?? i didn't feel much difference from stock to open dp impossible to tune for ....either you tune for open exhaust and it runs like crap when closed ….or tune for closed and gain nothing open.... The only thing I saw that works is a vacuum operated bypass valve…I was thinking about running it myself….then thought to myself “what the F’ am I doing… do I really need an extra 20 something HP with the extra noise?”….My wife confirm my thoughts... I would only end up getting a ticket or in VA jail … Link to comment Share on other sites More sharing options...
Brett Posted May 9, 2013 Share Posted May 9, 2013 yea the extra hp just doesn't go with that much extra noise Link to comment Share on other sites More sharing options...
I Donated thefultonhow Posted May 9, 2013 I Donated Share Posted May 9, 2013 Except a stage II tune is NOT 20psi. If you run 20 PSI, prepare to replace the iC. Furthermore, trying to get 20 psi out of a stock VF40 is crazy. let alone the waste gate issues. You MAY get 20 psi at a certain point, but once the Turbo reaches a certain RPM , it will cavitate, which has NOTHING to do with back pressure. Look carefully at my post. I said specifically that I do NOT have a VF40. Link to comment Share on other sites More sharing options...
robinlsb Posted May 9, 2013 Share Posted May 9, 2013 Look carefully at my post. I said specifically that I do NOT have a VF40. But the OP does have a VF40:lol: So, how do you help him if does not have your turbo set up? I specifically said stage II. You are what? Stage III or IV:eek: WOW, I would like to have a ride in your monster "Belief does not make truth. Evidence makes truth. And belief does not make evidence." Link to comment Share on other sites More sharing options...
700watts Posted May 9, 2013 Share Posted May 9, 2013 ^^whaa ? Link to comment Share on other sites More sharing options...
robinlsb Posted May 9, 2013 Share Posted May 9, 2013 So per everyone's suggestion, I've decided to get a downpipe. The cheapest I could find was a Tomioka catless downpipe(I have a twin-scroll btw) for $450, so I decided to go custom which I was quoted $300 for a catless or $400 for one with a metal-core Magnaflow cat,;both are 3"; I'd just need to supply the flange which is $18 off eBay. Anyways, I still have the stock exhaust on there and honestly, I just like the way it looks. I've thought about the STi mufflers but looks like a tight fit; and of the aftermarket ones I've seen the Q300 looks nice but more than I want to spend. Does anyone know if the stock mufflers are actually restrictive? I'm thinking about having the shop just install 3" piping all the way to the Y-pipe; but if they're restrictive wouldn't it be better to just have the shop leave the CBE piping alone and just later just upgrade? Regarding sound, I love a deep tone but do not want anything loud at all(basically silent at idle or light rumble during cruise would be nice). Wha??? what????? see anything about an upgraded turbo???? "Belief does not make truth. Evidence makes truth. And belief does not make evidence." Link to comment Share on other sites More sharing options...
700watts Posted May 9, 2013 Share Posted May 9, 2013 ^^drink much coffee ? Link to comment Share on other sites More sharing options...
I Donated thefultonhow Posted May 9, 2013 I Donated Share Posted May 9, 2013 Wha??? what????? see anything about an upgraded turbo???? Nope, but nothing about 20psi either. My point was that the stock exhaust actually is restrictive. This is true bone stock, and it's true with a huge turbo like 700watts's. It just matters a little more when you go big. I specifically said stage II. You are what? Stage III or IV:eek: WOW, I would like to have a ride in your monster Mild stage 3. To be honest, there are stage 2 setups that make more peak power than my car. Of course, it's the area under the curve that matters... The 16G still snaps you back in your seat when it hits. Link to comment Share on other sites More sharing options...
praedet Posted May 14, 2013 Share Posted May 14, 2013 I run a 3" DP with a race Cat, a 3" to 2.5" Y with a resonator, and a set of "lobotomized" stock cans with custom tips. Most of the power of a full exhaust, but still very quiet and no drone... Link to comment Share on other sites More sharing options...
I Donated thefultonhow Posted May 14, 2013 I Donated Share Posted May 14, 2013 a set of "lobotomized" stock cans Any details on this? Link to comment Share on other sites More sharing options...
scoobyscoodle Posted May 16, 2013 Share Posted May 16, 2013 You mean like what Nurse Ratched gave Mac? Link to comment Share on other sites More sharing options...
praedet Posted May 18, 2013 Share Posted May 18, 2013 Search guys You open them up and start cutting/drilling to make a smoother flow path with less restriction. This gives you stock fitment with a quieter exhaust. Plus you can put on new tips... Link to comment Share on other sites More sharing options...
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