Originally Posted by emarkey (Post 1342226)

maybe with more effort and desire, I could have walked away.

I'll be sure to find that b***ard who called a dyno a rolling road, and slate him for his sins.

Originally Posted by Chiburbian (Post 1342225)

I am going to dissent here a little bit.

If the question is - "for the most part, what approximate horsepower have people seen on a dyno at 7psi using a t28 turbo?" I think that question can be answered, especially if you give exactly what variation of a T28 turbo you are talking about and some other variables.

It is my understanding that T28 can be anything from a GT2554 to a 2560, and 7psi on those two turbos is a bit different, or am I mistaken?

Here is the thing though, the culture of MT.net is not to ask questions that can be found with a little digging. Also, if you are running a megasquirt, Doing a 1:1 pull (4th gear on a 5 speed, 5th gear on a 6 speed) over a relatively flat piece of road will give you a better ballpark than we can on the net.

Originally Posted by emarkey (Post 1342223)

I think you're right.
I didn't know how hard it was to type, "I'm making 200hp on my 1.8l at 7psi, with no mad mods. Good luck with your tuning"
What a time to be alive.

Originally Posted by Girz0r (Post 1342232)

https://www.miataturbo.net/esp_searc...ry=7psi%20dyno :eggplant:

https://www.miataturbo.net/attachmen...ine=1467210575

Originally Posted by cyotani (Post 1342236)

I got way to guess WHP at any boost level is Pressure Ratio multiplied by Stock WHP.
Assuming 110 whp stock 1.8.

7 psi = ((7 +14.6)/14.6) * 110 whp = 1.48 * 110 whp = 165 WHP
10 psi = ((10 +14.6)/14.6) * 110 whp = 1.68 * 110 whp =185 WHP
14.6 psi = ((14.6+14.6)/14.6) * 110 whp = 2.00 * 110 whp =220 WHP

This assume no temperature change in IAT vs Turbocharged so it will be more accurate with better intercooling. This formula would also be a good estimate for other size engine with different NA HP

This also proves the 7whp per psi estimate (but with a 200whp base engine it would be a different whp gaine per psi)
1 psi = ((1 /14.6) * 110 whp = 0.07 * 110 whp = 7.7 WHP Gain per PSI

Originally Posted by emarkey (Post 1342180)

PS I won't appreciate someone saying "it all depends on the engine, or dyno, or fuel in your country, or the tolerances of valve seats, or what you ate for f***ing breakfast that morning".

Let us know what hp you get at what psi :) Preferably on a stock engine.

Originally Posted by Braineack (Post 1342284)

im sure most people who talk to you have blank faces; saving you embarrassment from the laughter inside their heads.

Originally Posted by emarkey (Post 1342282)

Cool! People have often said to me, that gt2560 turbo is too big, a td04 can do like 14 psi just fine. To which I reply, the 2560 can move more air tho. They have a blank face.

Originally Posted by emarkey (Post 1342294)

I've never conversed with people who judge as much a you lot.