SR20DET Can't Reach 275HP (Says Who?)

[PrettyBoy2142]

So it' time to get to the botom of this. Im about to put nothing but facts down.
Its not what you know, its what you can prove. So can a SR20DET reach 275HP? Were about to find out.

SR20DET Specs: (Usually)
206HP
205ft-lbs
(At 7psi)

Everywhere i have read, from magazines to forums. It says that each psi gives you at least 8HP.
Safe limit you can take the stock turbo is between 10-12psi. Yes you can take it to 13psi but ie read that you will hurt your turbo
and really doesnt do much for you. That just on everything i have researched. Let me know if im wrong. (Safe Limit 10-12psi)
So if you can push your SR20DET to at least 12psi (Lets do some math ). From 7 to 12psi is 5psi. Each psi, it pushes the horsepower up by 8HP. So it's, 5psi x 8Hp=40HP . 206HP+40HP=246HP . So now, What most people have (Basic Bolt Ons) Yay!

Lets say we have a Brand Name Cold Air Intake (CAI), full exhaust, and high end spark plugs. Ok lets call on some names.
K&N COld Air Intake (CAI) will give you a minimum of 12HP. Might be more or less, thats just an average. 246HP+12HP=258HP
A Full Exhaust System (A Good One) will gvie you a minimum of 15HP. (Just an Average). So, 258HP+15HP=273HP
Now finally, 4 E3 Spark Plugs, which were proven (Videos Everywhere) that each will at least give you 1HP each. 273HP+4HP=277HP

So we end up with a final number of 277HP . Please let me know if im wrong. Im just trying to get to the bottom of the true performance of the SR20DET. Please let me know what you think. Dont be rude . If you have anything else to add or i made a mistake somewhere please let me know.

[AZ89two4Tsx]

I don't even know where to start.

Someone will have the time to explain it to you though.

NO WAY you can even get close to 275 on the stock turbo. You also need to research the difference between crank HP and wheel HP. Those bolt ons will get you nowhere near those gains as well. The increase from HP from changing from good plugs to the magical "E3s" does probably as much good as the difference between a cold and hot day....if that much...

[bersh240]

or you could use alot of NOSSSSS

[charat]

what you are saying is equivalent to saying "if i go from stock wheels to 25 inch wheels, i'll go faster because i'd be traveling a longer distance per rotation." no, it never works that way.

[AZ89two4Tsx]

^ Actually it would if the new wheels/tires weigh the same.

But I get what you're saying.

[AZhitman]

The real mistake here is believing ANYTHING you read in SuperStreet.

Here's the deal: Parts often come with an advertised HP gain. But those are NOT CUMULATIVE. In fact, some may actually work against each other.

No CAI has ever produced 12hp on a 2-liter. Period. Ever. Whoever told you that is a moron, and you can tell them I said so. VERY few exhaust systems will produce additional hp, and certainly not 15. I'd know, I own an exhaust fabrication company. So, that's wrong. Plugs? MIght free up horsepower, but 4hp is less noticeable than taking out your spare tire and taking a good healthy crap right before you go to the track.

Chasing numbers is for kids and magazine racers. In the real world, you modify, tune, and test. Then you try something else. You repeat until you get where you want, but numbers don't tell the whole story.

Just build your car, don't stress about some silly number. I've got $6000 in a fully-built KA-T and I never gave a damn about dyno testing. It hauls a$$, and that's all that mattered to me.

[Hoffman5982]

^+1 for this. I really have nothing to add except that this is a contradicting statement

" will give you a minimum of 12HP. Might be more or less"

[Brandon1605]

People still read Super Street? Amazing...

[matt_240sx]

Lets say we have a Brand Name Cold Air Intake (CAI)

A cold air intake wouldn't benefit a turbo engine too much.

[Lobo240sx]

It depends on how well the engine is maintained and tuned. I've seen T25 BPU SR's range from 190 - 260 to the wheels dyno tuned. So really the only way to find out is bolt on a mod at a time and take it to a dyno and see for yourself. Some mods may actually hurt you more than help. It depends on how the stock and CAI was designed. How well the engine responds to a bolt on. SR's seem to respond pretty well with a few mods at a time.

You are right after 11PSI you are basically blowing a hot shrink wrap blow dryer inside the engine. Time for a better flowing turbo, manifold, oil cooler, fuel management, etc.

[PantherRacer]

Now correct me if I'm wrong, but the 12-13psi "limit" is for the S13 T25 right, aren't the S14/S15 T28's able to push 14psi(or more) and still be in their efficiency range? Ok, yes. I know what I'm doing and I CAN go run to a map and get my answer, but then some noob wondering the same thing won't have the benefit of some witty answer!
The context says we're talking about S13 SR's, but it wasn't specified or limited to those, so lets get some more clarification and variables thrown out there.

[Seishuku]

Isn't there someone already running an SR with a T25 that puts down 270WHP?
I know I'm fairly close, but I've got pretty tightly tuned fuel and timing maps, so I got about as much as I can squeeze out of that little turbo.

[Lobo240sx]

Now correct me if I'm wrong, but the 12-13psi "limit" is for the S13 T25 right, aren't the S14/S15 T28's able to push 14psi(or more) and still be in their efficiency range? Ok, yes. I know what I'm doing and I CAN go run to a map and get my answer, but then some noob wondering the same thing won't have the benefit of some witty answer!
The context says we're talking about S13 SR's, but it wasn't specified or limited to those, so lets get some more clarification and variables thrown out there.

S14/S15 turbos efficiency is ranged from 15-18psi with a good tune.

[rc1honda]

Maybe if you put the turbo on so that it is feeding the cold air intake! That would make hella crazy flow power.

[Amays U G37S]

I think you need to explain to the wheels or to the crank. If the car puts 260 to the wheels on the dyno sheets, then it is much more on the crank.

[PantherRacer]

Now correct me if I'm wrong, but the 12-13psi "limit" is for the S13 T25 right, aren't the S14/S15 T28's able to push 14psi(or more) and still be in their efficiency range? Ok, yes. I know what I'm doing and I CAN go run to a map and get my answer, but then some noob wondering the same thing won't have the benefit of some witty answer!
The context says we're talking about S13 SR's, but it wasn't specified or limited to those, so lets get some more clarification and variables thrown out there.

S14/S15 turbos efficiency is ranged from 15-18psi with a good tune.

Thank You very much.

I think you need to explain to the wheels or to the crank. If the car puts 260 to the wheels on the dyno sheets, then it is much more on the crank.