3.8 built ready
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I just let the car in the garage guys,
New logs are done, boost regulation @1,30Bar with spikes @1,35. Several short pulls and only one long pull: incredibly we did at 100-200/300 5,4' and 18,8'! (VBox times).
I believe the more I run it the better it will perform. (breakin in)
I even did 5,2' at 100-200 alone in the car, very nice for me.
To answer the questions: IMO 3,8 is not necessary with the VTGs as they already choke at top end with the 3,6, I mean it is not worst of course, even better, but only by low and mid range (IMO I repeat).
The engine response is really "harder" and more impressive with the Alphas, the engine pulls more and more until you let the throttle.
New logs are done, boost regulation @1,30Bar with spikes @1,35. Several short pulls and only one long pull: incredibly we did at 100-200/300 5,4' and 18,8'! (VBox times).
I believe the more I run it the better it will perform. (breakin in)
I even did 5,2' at 100-200 alone in the car, very nice for me.
To answer the questions: IMO 3,8 is not necessary with the VTGs as they already choke at top end with the 3,6, I mean it is not worst of course, even better, but only by low and mid range (IMO I repeat).
The engine response is really "harder" and more impressive with the Alphas, the engine pulls more and more until you let the throttle.
I hear yah!
I wonder what A28's would be like and also A3071/73's.
Do you think with a slightly smaller housing and more boost it would drive even better?
More exciting I mean!
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The difference between VTGs and Alphas is real and significant. Your motor is operating much more efficiently. This is only at 1.3 bar AND PUMP GAS with PUMP GAS TIMING. Transforms the vtg puppy into a beast. VTGs are real duds up top. VTGs do have quick response down low but when your in second gear and nail it, alphas will outperform VTGs if you can hold the tires. Having had both, VTGs are minor league.
I'm still happy in the minor leagues.
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What P is getting by upgrading is a more efficient system and much larger power band. At 1.3 bar, he can blow away vtgs running at 1.5 bar. Less chance of detonation at 1.3 bar than 1.5 bar. Piece of mind is worth a lot.
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There's no doubt that the alphas have waaay more potential using e85 or racegas but I'm interested in pumpgas numbers because that is what I'm stuck with. Is the 1.3bar setting pretty much the max recommended for the alphas on pumpgas with Pascal's setup? 5.2s 100-200 is really fast but if I were to fork over that kind of cash I'd still want more. I'm still happy in the minor leagues.
I'm still happy in the minor leagues.But P's car is very fast and I would love to experience it.
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Is it even comparable? Isn't the limit of the vtg the small housing. Does a alpha setup with the same size of the hybrid vtgs makes more power?
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Apples to oranges. VTGs have variable aspect ratio. Alpha's are conventional turbo with fixed a/r. It's been proven that you can make the same amount of power using alpha's at lower boost than upgraded vtgs at higher boost. If you clipped the turbine on upgraded vtgs and use larger compressor wheel, you will find that the peak torque is shifted to the right, not much different than alphas but alphas have a lot more room on top.
...ie crankHP...
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True enough. No debate that the alpha is much faster on pumpgas, but iirc there are some cars that do 5.5s 60-130 on pumpgas with a28s or a30s without a built engine. That's why I'm wondering if P is just being very conservative with his setup vs reaching the limit on the a3071?
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5,5/5,6' @100/200 2 persons in and 5,2/5,3' alone is NOT a scoop but repetitive times with my car with Euro common pumpgas, probably conservative... (I hope!)
Sure my setup can deliver more, but a few thousands $ or € are the cost of the limit, I played 1 time, and I hope it will be the lonely.
Sure my setup can deliver more, but a few thousands $ or € are the cost of the limit, I played 1 time, and I hope it will be the lonely.
Last edited by K24F; Dec 21, 2013 at 07:10 PM.
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Low 5s 100-200 kph on pump gas and 19 lbs boost is phenomenal. E85 or race gas
and 5 more lbs of boost and you would be mid 4s.
I've got a couple high 3s but that was on e85 and 1.9 bar. I would imagine that pump
gas and 1.3 bar would be about the same as yours on my car.
and 5 more lbs of boost and you would be mid 4s.
I've got a couple high 3s but that was on e85 and 1.9 bar. I would imagine that pump
gas and 1.3 bar would be about the same as yours on my car.
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Low 5s 100-200 kph on pump gas and 19 lbs boost is phenomenal. E85 or race gas
and 5 more lbs of boost and you would be mid 4s.
I've got a couple high 3s but that was on e85 and 1.9 bar. I would imagine that pump
gas and 1.3 bar would be about the same as yours on my car.
and 5 more lbs of boost and you would be mid 4s.
I've got a couple high 3s but that was on e85 and 1.9 bar. I would imagine that pump
gas and 1.3 bar would be about the same as yours on my car.
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You are welcome sir! But I gotta disagree with you on something.
I don't think there's a lot of a28 and 3071 cars doing 5.5s 60-130.
Matter of fact, I don't think there's a lot of BIG turbo cars running
those numbers on pump gas.
I had the fastest 996TT a28 car and I hit 5.3s on ms109 and 1.65 bar.
It would run consistent 5.5s but it was on 109 and high boost.
My 3073 car is in the top 5 fastest 996TT and I bet I wouldn't do much
better than 5.5 60-130 on pump!
5.5 on pump is FAST as hell!
I don't think there's a lot of a28 and 3071 cars doing 5.5s 60-130.
Matter of fact, I don't think there's a lot of BIG turbo cars running
those numbers on pump gas.
I had the fastest 996TT a28 car and I hit 5.3s on ms109 and 1.65 bar.
It would run consistent 5.5s but it was on 109 and high boost.
My 3073 car is in the top 5 fastest 996TT and I bet I wouldn't do much
better than 5.5 60-130 on pump!
5.5 on pump is FAST as hell!
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those big VTGs, 3.8 ltr and cams are gonna be a knockout punch!
btw, do you have the FVD Ps&Cs?
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Posts: 2,658
From: GTA, Ontario, Canada
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You are welcome sir! But I gotta disagree with you on something.
I don't think there's a lot of a28 and 3071 cars doing 5.5s 60-130.
Matter of fact, I don't think there's a lot of BIG turbo cars running
those numbers on pump gas.
I had the fastest 996TT a28 car and I hit 5.3s on ms109 and 1.65 bar.
It would run consistent 5.5s but it was on 109 and high boost.
My 3073 car is in the top 5 fastest 996TT and I bet I wouldn't do much
better than 5.5 60-130 on pump!
5.5 on pump is FAST as hell!
I don't think there's a lot of a28 and 3071 cars doing 5.5s 60-130.
Matter of fact, I don't think there's a lot of BIG turbo cars running
those numbers on pump gas.
I had the fastest 996TT a28 car and I hit 5.3s on ms109 and 1.65 bar.
It would run consistent 5.5s but it was on 109 and high boost.
My 3073 car is in the top 5 fastest 996TT and I bet I wouldn't do much
better than 5.5 60-130 on pump!
5.5 on pump is FAST as hell!
