AGP Turbo's X.....NOW 84whp gain...update pg4
Jan 24, 2008, 09:06 PM
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AGP Turbo's X.....NOW 84whp gain...update pg4
Still on the dyno trying different parts. So far with just an AGP TBE and the Turbonetics billet boost controller we gained 55whp over our stock base dyno. Stock we did 261whp and just now did 316whp. Both are at 23psi with 91oct AZ **** gas. The stock runs dropped to 15psi at redline and right now they are dropping to 17psi. We're going to swap in our stronger waste gate actuator and see if we can get it to hold more boost to redline.
More to come.......
Kevin@AGP
UPDATE on page4 84whp gain so far
More to come.......
Kevin@AGP
UPDATE on page4 84whp gain so far
Last edited by Z1500; Jan 26, 2008 at 09:01 AM.
Jan 24, 2008, 09:17 PM
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Couple things we've learned so far.
The car is still in the 10's AFR's.
The stock actuator is a 12psi unit. It's is adjustable but if you adjust it for more preload, then it no longer has enough travel to keep the boost down. The car freaks out and hits fuel cut at 26psi if you tighten up the stock actuator.
We built a cold air intake pipe but we're not going to put it on till the end cause the stock unit is pretty good. We want to see how bad you really need one.
The car is still in the 10's AFR's.
The stock actuator is a 12psi unit. It's is adjustable but if you adjust it for more preload, then it no longer has enough travel to keep the boost down. The car freaks out and hits fuel cut at 26psi if you tighten up the stock actuator.
We built a cold air intake pipe but we're not going to put it on till the end cause the stock unit is pretty good. We want to see how bad you really need one.
Last edited by Z1500; Jan 25, 2008 at 01:20 AM.
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Jan 24, 2008, 10:20 PM
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Man, try cali 91 oct 
The gains seen by any aftermarket intakes on the dyno probably won't translate quite as well on the road. The tests are done with the hood up, so sticking a cone filter in place of the airbox... well, the stock airbox has to suck through the snorkel whereas the cone suddenly has all this air volume to pull air from with the hood up.
BUT, the stock airbox is pretty damn well designed from the factory. The air filter sits vertical so the air has a straight shot through it and down to the turbo. It's a much better design than the stock airbox on the VIII/IX which has to make a 90 degree turn into the airbox and then a 180 degree turn down to the turbo. So that's like 270 degrees worth of turns that the air has to make versus the near straight shot on the X. Might even get a little bit of a ram air effect with the stock airbox on the X.
The gains seen by any aftermarket intakes on the dyno probably won't translate quite as well on the road. The tests are done with the hood up, so sticking a cone filter in place of the airbox... well, the stock airbox has to suck through the snorkel whereas the cone suddenly has all this air volume to pull air from with the hood up.
BUT, the stock airbox is pretty damn well designed from the factory. The air filter sits vertical so the air has a straight shot through it and down to the turbo. It's a much better design than the stock airbox on the VIII/IX which has to make a 90 degree turn into the airbox and then a 180 degree turn down to the turbo. So that's like 270 degrees worth of turns that the air has to make versus the near straight shot on the X. Might even get a little bit of a ram air effect with the stock airbox on the X.
Jan 25, 2008, 01:44 AM
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Man, try cali 91 oct
The gains seen by any aftermarket intakes on the dyno probably won't translate quite as well on the road. The tests are done with the hood up, so sticking a cone filter in place of the airbox... well, the stock airbox has to suck through the snorkel whereas the cone suddenly has all this air volume to pull air from with the hood up.
The gains seen by any aftermarket intakes on the dyno probably won't translate quite as well on the road. The tests are done with the hood up, so sticking a cone filter in place of the airbox... well, the stock airbox has to suck through the snorkel whereas the cone suddenly has all this air volume to pull air from with the hood up.
Just as a general note for those wanting to know about the X. The car is really really easy to work on. It's really a pleasure after fighting a 335i to have nice open engine bay where you can get to everything. And after looking at it up close for a while, it makes the 8+9 look very plain. The aggressive styling really grows on you. The engine is clearly responding to mods just as well as the 9, and the X has a stronger trans than anything ever bolted to a 4g63. The only downside I can see in the X is the additional 250lbs. But you can't tell it's there when you drive it and if the powertrain, brakes and suspension are all improved to negate the added weight, who cares. I'm not going to run right out and trade in my 9 but all my fears of Mitsu killing a once great car are gone.
Kevin@AGP
Jan 25, 2008, 02:16 AM
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So we ended up with 320tq 326hp. That's 65whp over our stock baseline. All being done at 23psi on 91oct just like the stock pulls. We had one oddball spike to 340+hp but it was just a fluke. We were able to get the car to hold 20psi to redline but that little turbo is pretty well maxed out. We'll have our big bar+plate FMIC on there later today and a little better flowing hot side pipe. Going to do some more testing on different cold air intake designs too. Getting the most out of the stock turbo and making best use of that boost before we upgrade the turbo. It's pretty clear that this turbo is about 5-6lb/min smaller than a 9 turbo. So mid 300's is all she's got in her.
And at this point the car is still running AFR's in the 10's. So a little tuning would net 10 more hp easy. And any sort of decent gas would help a lot, the X runs pretty aggressive timing and we're getting a good amount of knock. I expect our big FMIC will help a lot with the knock, I haven't checked compressor outlet temps yet but I'm sure they are sky high.
Kevin@AGP
And at this point the car is still running AFR's in the 10's. So a little tuning would net 10 more hp easy. And any sort of decent gas would help a lot, the X runs pretty aggressive timing and we're getting a good amount of knock. I expect our big FMIC will help a lot with the knock, I haven't checked compressor outlet temps yet but I'm sure they are sky high.
Kevin@AGP
Jan 25, 2008, 04:41 AM
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How are you seeing the excessive knock?
How much timing is being pulled?
Was this knock before, after or on both tests with an Intake on the car?
Do you have the ability to see a calculated load?
How much timing is being pulled?
Was this knock before, after or on both tests with an Intake on the car?
Do you have the ability to see a calculated load?
Jan 25, 2008, 06:03 AM
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so, can you post some pics of your evo, and the parts you are talking about or is this a phanton car?
So we ended up with 320tq 326hp. That's 65whp over our stock baseline. All being done at 23psi on 91oct just like the stock pulls. We had one oddball spike to 340+hp but it was just a fluke. We were able to get the car to hold 20psi to redline but that little turbo is pretty well maxed out. We'll have our big bar+plate FMIC on there later today and a little better flowing hot side pipe. Going to do some more testing on different cold air intake designs too. Getting the most out of the stock turbo and making best use of that boost before we upgrade the turbo. It's pretty clear that this turbo is about 5-6lb/min smaller than a 9 turbo. So mid 300's is all she's got in her.
And at this point the car is still running AFR's in the 10's. So a little tuning would net 10 more hp easy. And any sort of decent gas would help a lot, the X runs pretty aggressive timing and we're getting a good amount of knock. I expect our big FMIC will help a lot with the knock, I haven't checked compressor outlet temps yet but I'm sure they are sky high.
Kevin@AGP
And at this point the car is still running AFR's in the 10's. So a little tuning would net 10 more hp easy. And any sort of decent gas would help a lot, the X runs pretty aggressive timing and we're getting a good amount of knock. I expect our big FMIC will help a lot with the knock, I haven't checked compressor outlet temps yet but I'm sure they are sky high.
Kevin@AGP