400 hp on a 8v??

[Polygon]

Is that the best option, or are there better options out there? I honestly have no qualms with spending money on this car. I'm well past the point ever selling it.

[BadAssPerformance]

Define 'best'

400whp and look stock

400whp and be capable of 500whp and look custom

[Polygon]

Oh, I certainly don't want to spend money for the sake of spending money. Just concerned with things improved response etc. Not so much just numbers.

[cordes]

IIRC CSXTRA is putting down around 350HP on a stock two piece. He thinks it's tapped out though.

[turbovanman²]

So, then here's my question..... Intakes?

I don't have goals to break 400WHP. My goal is 350 WHP. After reading through this thread I'm seeing that the general consensus is to ditch the stock intake manifold be it a one or two piece. So, what's the options then for a manifold?

2 piece is your best bet, then a 2 piece lower hogged out and welded then a custom top. Someone needs to make custom lowers,

[csxtra]

IIRC CSXTRA is putting down around 350HP on a stock two piece. He thinks it's tapped out though.

You are correct sir!! I'm also still running the stock 46mm throttle body.

No matter what I do, I can't get it to go any faster. I'm running basically the same setup that Reeves was running when he made 400whp, except he had a spoon intake (canadian modified one-piece) and a 52mm throttle body.

So I'm guessing the intake and TB are the cork...hoping I can get it uncorked before SDAC this year...

[Shadow]

Got data? It didnt seem to help my car, but it may not have been the cork

You went from a "stock style" S/V to a 3" or larger smooth mandrel right of the turbine and gained nothing? I've seen cars gain 3mph in the 1/4 and spool 2-300rpm sooner with our 3" mandrel S/V. (from a stock 2 1/2")

You are correct sir!! I'm also still running the stock 46mm throttle body.

No matter what I do, I can't get it to go any faster. I'm running basically the same setup that Reeves was running when he made 400whp, except he had a spoon intake (canadian modified one-piece) and a 52mm throttle body.

So I'm guessing the intake and TB are the cork...hoping I can get it uncorked before SDAC this year...

A fully ported 2 piece with 52mm TB will support 400WHP without too much difficulty. Having said that, you could gain 20-30WHP with a properly built intake at that point.

[BadAssPerformance]

You went from a "stock style" S/V to a 3" or larger smooth mandrel right of the turbine and gained nothing? I've seen cars gain 3mph in the 1/4 and spool 2-300rpm sooner with our 3" mandrel S/V. (from a stock 2 1/2") .

Both stock style SV's 2.5" to 3". Full 3" exhaust afterwards, my prototype tube header upstream. I am not positive that it could not make more power, just that it did not. I think my cork was the intake as it also did not gain anything going from 24psi to 30psi

[Shadow]

Both stock style SV's 2.5" to 3". Full 3" exhaust afterwards, my prototype tube header upstream. I am not positive that it could not make more power, just that it did not. I think my cork was the intake as it also did not gain anything going from 24psi to 30psi

O.K. So your saying you never had a 3" 90 or mandrel smooth S/V? Just the stock style 3" upgrade?

[Pat]

Both stock style SV's 2.5" to 3". Full 3" exhaust afterwards, my prototype tube header upstream. I am not positive that it could not make more power, just that it did not. I think my cork was the intake as it also did not gain anything going from 24psi to 30psi

If going from 24 to 30 psi didn't net you gains, your cork was probably elsewhere.

FWIW, I went from a stock style 2.5" swingvalve set up to a 3", smooth mandrel bent SV/downpipe set up and saw very nice gains. Saw my max boost go up by 2-3 psi. Track showed increases too, although I don't have my notes with me to tell you how much.

[Shadow]

If going from 24 to 30 psi didn't net you gains, your cork was probably elsewhere.

FWIW, I went from a stock style 2.5" swingvalve set up to a 3", smooth mandrel bent SV/downpipe set up and saw very nice gains. Saw my max boost go up by 2-3 psi. Track showed increases too, although I don't have my notes with me to tell you how much.

This is exactly the kind of gains I would expect to see. As you decrease the BP on the AFT side of the turbine, everything becomes more efficient.

[Pat]

This is exactly the kind of gains I would expect to see. As you decrease the BP on the AFT side of the turbine, everything becomes more efficient.

If....there's isn't another cork in the system, which is what JT was likely experiencing.

[CSXT802]

So, then here's my question..... Intakes?

I don't have goals to break 400WHP. My goal is 350 WHP. After reading through this thread I'm seeing that the general consensus is to ditch the stock intake manifold be it a one or two piece. So, what's the options then for a manifold?

I made 348 WHP with a stock unported T1 intake. The peak was well before 6000 rpm and it fell off like a stone after peak.

[turbovanman²]

If....there's isn't another cork in the system, which is what JT was likely experiencing.

So he has a header, good turbo and SV, intake etc, what would his blockage be? Head? turbo?

[BadAssPerformance]

O.K. So your saying you never had a 3" 90 or mandrel smooth S/V? Just the stock style 3" upgrade?

I had a 3" cast SV which is about as big as it gets... noticably larger than the 2.5" Turbonetics SV that was on it

If....there's isn't another cork in the system, which is what JT was likely experiencing.

So he has a header, good turbo and SV, intake etc, what would his blockage be? Head? turbo?

The head was good... as stated earlier I'm pretty sure it was the intake. Ported 2-pc that was very well balanced but not hogged out as much as it could have been.

[Polygon]

I made 348 WHP with a stock unported T1 intake. The peak was well before 6000 rpm and it fell off like a stone after peak.

Gahhh, so top end wasn't very good? See, that's something I'd like to avoid. I'd like a good balance of high and low end.

I don't even know of any aftermarket intakes. I know of some people that have considered having a go at making them, but nothing but a bunch of one offs.

Also, I'm assuming that a 58mm TB is a must? What size intake piping should I use as well. I was thinking 2.25" should be enough, but I could be wrong.

[turbovanman²]

52mm will get you where you want to go. There a few intakes floating around,

If your doing the IC piping, then go 2.5".

[Shadow]

If....there's isn't another cork in the system, which is what JT was likely experiencing.

There are corks, like a bad I/C set-up or what happens to exhaust efficiency when it is made to careme off a wall lol, these types of corks can stop you dead in your tracks.

Then there are corks like intake and exhaust mani that can be improved upon, but they will rarely stop you like a wall.

I had a 3" cast SV which is about as big as it gets... noticably larger than the 2.5" Turbonetics SV that was on it.

Now this doesn't surprize me, I thought you were saying you switched to a full 3" mandrel 90 and saw no improvement. Glad we got that straight!

[BadAssPerformance]

Now this doesn't surprize me, I thought you were saying you switched to a full 3" mandrel 90 and saw no improvement. Glad we got that straight!

You're kidding me right? A "full 3" mandrel 90" will make a measureable amount of HP over a huge cast 3" dump? ...I'm gonna have to see back to back data to begin to belive this.

[Shadow]

You're kidding me right? A "full 3" mandrel 90" will make a measureable amount of HP over a huge cast 3" dump? ...I'm gonna have to see back to back data to begin to belive this.

Who's making huge power through a stock style S/V....any size?