Hi,

Here is one.

https://www.evolutionm.net/forums/sh...threadid=64232

I think Mike's boost pressure and tire pressure where pretty close to the same.

Speedlimit .......

 

Was this motor on the up and up. Meaning, was it at a safe tune?

 

I've heard of a couple over time. Probably both not tuned very well running too much boost. One was a head gasket failure the other I don't know.

 

They had a fuel pump failure, that cause the car to go extremely lean = detonation = rod failure.

Keith

 

There is simply more out there for the EVO so of course ppl have blown a few. They are obviously fighting more unknowns on the STi so they are blowing more. The ECU is more difficult in the STi than the WRX or EVO, IMHO. Once there is something out for that, watch out. They do have a bigger displacement. As I said before, with the STi right now, it's either do a few small things or quite a bit if you want something reliable.
The STi tranny is better; hands down, but very few non-abused EVO trannies have broken.
Mike was the victim of a fuel pump from what I've heard; that's to be expected with that kind of boost and flow.

 

Can an EVO run a setup that could produce a 12.5sec 1/4 mile and still be reliable? It seems that in order to run that fast, you should have about 350WHP. Can the stock tranny hold that? My friend has an EVO and is concerned...

 

Should be easily possible. I don't have long term experience to say for sure, but my car with Vishnu Stage 1+ should be in that range for the 1/4, and I'm using it as a daily driver, did a 1200-mile freeway round trip drive recently, and have had zero problems.

 

Why is that misleading? The car flow more air and makes more power and thats misleading?

 

You will find that the given your initial requirements of stock internals from the valve cover down, the EJ257 will make more power. That implies to me that you are willing to mod the turbo and piping but not cams. David Buschur has already posted the limitations of the 4G head, and the EJ257 cylinder walls are made of paper.

If you are willing to mod internals, all bets are off. With cash at your disposal, the EJ can be closed deck, with ductile liners, big cams and the valves to flow it. And at the end of the day, it can be made _bigger_ than 2.5L (There is already a 2.6L and a 2.8L shortblock available).

The other thing to consider is that if you decide to go whole hog, the EZ series is right there. It's 1" longer, and there is plenty of room for the 3.0L swap. In fact, I may just see how well it does work (EJ20 internals are a dead even swap).

Let's be cliched...displacement..yada yada.

For easy, cheap modibility with relatively stock internals, the 4G pwns the EJ257 right now, however.

 

Torque is what accelerates the car. The S2000 is a misleading car because it makes alot of power and relatively lesser torque.
An EVO with 350 whp and 280 wtq may or may not get beat by an STi with 300 whp and 320 wtq.

 

Regarding your comment of Buschur, that is true of the stock head if you must leave it stock but things change dramatically when you are allowed headwork. The 4G63 makes big gains whereas there isn't as much possible with the EJ2x7 heads.
I don't think anyone has seen the EJ motors handle the sheer torque and power reliably like the iron 4G63 block. As is always the case, the 4G63 motors are more power motors and the EJ motors are more for torque.

 

Torque does not accelerate ****. The S2000 is not misleading at all. It runs 13.9's with 240 Crank hp...

Torque is not a measure of work in any way what so ever, its a measure of rotation force. That doesn't mean your accomplishing **** with it.

If you are trying to takes off your lug nuts and you can't, you might be generating 200 ft/lbs and 0 HP. And because there is 0 HP, there is zero movement. PERIOD.

A diesal engine produces gobs of torque, often over 800 on street vehicles, but well under 300 HP....and guess what number it accelerates relative to? It can pull a boat, but it cannot accomplish alot of work.

Now...HP = TQxRPM/5252....so a car with more torque at lower RPM's is accelerating faster because it has morw HP at that RPM. But a Mustang producing 240 hp and 240 Tq at 5252 RPM will accelerate the EXACT same as a similair weighted and gear ratio vehicle making 240 hp and 120 ft/lbs at 10,504 RPM.

Thats why F1 cars rev to 19k and make over a THOUSAND HP with less 350 ft/LB's....and are insanely ****ign fast. Low 9 sec 1/4 miles with gearing made for a racetrack with turns.....While the same weighted vehicle with 1000 ft/lbs and 350 hp would lose to my daily driver by 200 feet....

 

I still remember this quote from a magazine article...

"Torque pushes you back to your seat but horsepower wins the race..."

 

350?!

You could run a 12.5 in an Evo with 280 WHP.

 

Way to stay civil in the conversation.
Torque is not a measure of work, yes.
If you don't have any movement, you don't have any work, yes.
If you can't move the lugnut with 200 lb.ft. you will need even more torque to move it; so what?
True, if you have tons of torque and THAT low of HP you will indeed lose to a more balanced car that has better gearing; it isn't as simple as you make it.
The mustang and the 10krpm car; you don't know who would win until you specified the gear ratios both are using and the kind of race (speeds, etc), the Cd, weight, etc. etc..
It's all well and good to use the example of a super heavy, super low redline, low geared truck with lots of torque and try to compare it to a sports car, but in reality we are comparing two very similar cars, built for the same purpose, and one has more torque while the other one has more HP.
As I said there are lots of things to consider like gearing, the race conditions, time lost between gears, etc. Very fast domestics have lots of torque and not as much HP, so they are simply geared low to make it to the finish line first; albeit you wouldn't want to cruise around at 65mph in the car.
I am not saying HP is useless and only torque is important. Both are important. I am simply trying to get some guys to consider the torque as well so they can get an idea of the powerband. The modded EVO owners who have test driven a stock STi usually come out of the car impressed with it's torque.
I am comparing the STi and EVO; not an F1 car and your DSM. I said may or may not. Not, "Oh the STi will crush your pathetic 4G63". I own an EVO myself. I tune both those cars and others as well.