Good luck with the build, I cant wait for it to be done. BTW, around what RPMs do you hit full boost?
Here's a comparison of a 3L 770 car vs. a 2.7L. The 3L is spooling considerably faster - AND is running 0% WGDC in this log. Basically 770's on a 3L hit 30psi at 4000rpm...
wow... im impressed...thats close to my next build project, which i should start once i find an S4 with a blown motor or something. not going 3.0 though.. 575 whp is going to be crazy.. then 650+ on race fuel.. man.. have fun, keep the updates coming so i know what to expect... you going up to EPL to get it dyno tuned??
Car is being built and dyno tuned at AMD which is basically right down the street.
Here's a comparison of a 3L 770 car vs. a 2.7L. The 3L is spooling considerably faster - AND is running 0% WGDC in this log. Basically 770's on a 3L hit 30psi at 4000rpm...
That's EVIL. Like really evil.
Cactus Green S4 Avant
"A turbo: exhaust gasses go into the turbocharger and spin it, witchcraft happens and you go faster." - Jeremy Clarkson
Wow shes gonna be a beast, I still kind of wish I could have found a laser car I love that color, makes it hard for me to get rid of my A4. There's a pretty good collection of really fast S4s up here in the NW, mine should be there soon. Also any chance you plan on taking it down the strip or on the track? Would love to see this thing tear it up.
- 00 Nogaro S4 - Single Turbo Project / 01.5 - Silver S4 - Stg. 3 / Five other B5s that have all been sold
=jibberjive;5192386]I guess a better way to ask my question is, what are your design goals with your build and how do you feel that headers were the only thing that didn't fit with them? I know your build will have more WHP than you need, but you're spending all that money on all of the small extra odds and ends to try to max out your setup, or rather use all of its potential, right? Sorry Adam, I'll take these questions about his build to his thread from now on.
As with most builds it starts out one way and progresses to something else. I think .49 AR shows its a good ballance for the 2.7T. Still waiting for someone who did the exhaust mani's to produce the results everyone expects. If I wanted to make 700-800WHP I would definately have included them. But when is enough? Personally I am happy with 550WHP on pump and 650WHP on race. Not saying thats what I am shooting for. The car will land where it lands when its all said and done. 30PSI @4K PRM should be FUN!
Last edited by Burningcoals; 04-29-2010 at 09:10 PM.
How much boost do you run on the 770s? The graph you showed doesn't show all that much, I mean it sure does show that the spool is much better than before, but to people who may not know the stock MAP sensor is at it's limit at ~22PSI. So that's not showing the whole picture. Some will think full boost is achieved by X RPM but I'm sure you're not running just 22PSI on these :).
How much boost do you run on the 770s? The graph you showed doesn't show all that much, I mean it sure does show that the spool is much better than before, but to people who may not know the stock MAP sensor is at it's limit at ~22PSI. So that's not showing the whole picture. Some will think full boost is achieved by X RPM but I'm sure you're not running just 22PSI on these :).
That graph shows spool on a 3L motor. 770's can hit 40+ PSI, and efficiency range is 30-34psi. Plenty of data on 770's with cars making over 550WHP no issues with great spool characteristics.
I can tell you that what you dont see is the turbos hitting 30PSI @ 4K RPM. Since I am no longer doing 770's, unfortunately I will not be able to share my 3L + 770 experience.
I can tell you that what you dont see is the turbos hitting 30PSI @ 4K RPM. Since I am no longer doing 770's, unfortunately I will not be able to share my 3L + 770 experience.
Im like right down the street from AMD as well. What are you going to run next? One of you crazy fast s4 guys around here should give me a ride in your car sometime.
First time ever I feel my car is where I really want it to be. It's pretty awesome! It probably wont see final tune until I get her broken in first. But believe me I want to get it tuned ASAP!
Should probably take delivery next week. Been a long build process, I have changed my mind more times then you could imagine on where I wanted to go. I want to thank AMD for delivering on expectations for form and function, not cutting any corners, working within my budget to complete this car.
Ultimately I was going for bigger turbos over the 770's. But I changed my mind and stuck with them. I like the balance of power and spool.
So you left stock intake stuff like me? Stock Intake Manifold and Throttle Body? I'm very curious to see how that works out if so. Would br nice to know if really is a big restriction or not.
Originally Posted by Burningcoals
Yep; it's done with break-in. Should go into the shop soon. Still probably be a week or so. AMD is busy these days and there is some small things to finish up.
Any guesses what it will do with stock uppers? Basically no cold side mods. Will be doing that at a later date, possibly. I don't think it will make the same power at your boost level. But I think it will make more tq, and I plan on running more boost on a pump tune.
Yep; it's done with break-in. Should go into the shop soon. Still probably be a week or so. AMD is busy these days and there is some small things to finish up.
Any guesses what it will do with stock uppers? Basically no cold side mods. Will be doing that at a later date, possibly. I don't think it will make the same power at your boost level. But I think it will make more tq, and I plan on running more boost on a pump tune.
awesome. very curious to see what 770s do on a 3L. I think it will be good to compare it to 770s on a 2.7 and to HTA2868s (w/ tial .64 vband hotside) on a 3L.
Im sure you will have a 600+whp dyno sheet to share very soon!
So you left stock intake stuff like me? Stock Intake Manifold and Throttle Body? I'm very curious to see how that works out if so. Would br nice to know if really is a big restriction or not.
I am waiting for AMD to develop IM and other cold side stuff, and come up with another solution that might be worth more gains. However I have heard up to 30WHP or more if you do RS4 uppers w/2.8CAMS.
I am running RS4 cams; because thats what I had. Other then the 2.8 heads, This will let people know if doing all the cold side shit is worth it or not. My goal with this build was focused on crazy spool and early boost numbers. However if it is a huge efficiency difference not having RS4 uppers I can always go that route.
I can tell you that the car is already crazy, wheel spin on break-in tune, and hits harder then my K04 car did. You can definitely tell the difference with 3L.
Your care is byooooteeeful. Must have a ride in it.
Jeff
2000 S4
Revo w/SPS3
AMS TBB, Stern snub mount, Apikol Rear Diff Mount
3" custom exhaust, Minor lemmi tweaks
ST Coilovers
710N, EBC Slotted + Dimpled
Incognito Piggie Pipes, 034 Density Trans Mounts
Voodoo MBC Ceramic in MBC only mode
other stuff
^well shit sign me up too, ha any idea on when your headed to AMD to get your next tune? I'd love to make the drive down and see this thing tear it up on the dyno.
- 00 Nogaro S4 - Single Turbo Project / 01.5 - Silver S4 - Stg. 3 / Five other B5s that have all been sold
Reply With Quote
Originally Posted by GramCracker
| 
Bookmarks