View Single Post
  #8  
Old October 29th 2005, 15:22
scoobytuner scoobytuner is offline
Registered User
 
Join Date: Oct 2005
Posts: 34
its nice to see so many people chiming in on their own setups, it looks like we should be able to share alot of good information. i did have a few little corrections to make before any bad information gets spread around.

Quote:
Originally Posted by lazylongboarder
I'm also doing an EJ swap, the stock ej20t (tt) longblock/internals will handle 405 hp on average which equals 19 lbs of boost. As long as you can push enough fuel to the motor, it's healthy between 350-400 hp. As long as your tranny will handle the torque of the motor, this is one wicked setup. A 915 will handle about 300 lb. ft of torque.
A stock ej20t header fits, an ej20tt's stock dual exhaust hits the axles, but since the stock exhaust isn't used, you get better heads, better spool up time, because of the sequential turbos, and better torque.
there is really no such thing as a ej20t. if you look on the block of a car, there is nothing saying ej20t, it will say ej205 ej207 ej257 ej20g ej255 ej25 ect ect. ej20t is like using a very broad term to describe the engine. infact in my recollection there is no such thing as an ej20 non turbo. so with that being said, I just want to clarify a few little things. lazylongboarder, i dont mean to pick on your post, because you have alot of good info, but if i might, i would love to clean up some of what you said that is somewhat untrue. youve been misinformed. i want to get this stuff cleared up in the spirit of spreading truths rather than untruths. its obviously nothing personal either because you are a way cool guy with lots of knowledge amd i know that first hand.

there is nothing published saying the stock ej20 motors will handle 405 hp. infact, i know of a bonestock ej20 motor making 500 whp which is probly more like 600 at the flywheel. thats an ej207. the ej205 is the stock wrx motor, (227hp) and usually can make 400 hp properly tuned. ive seen wrx motors crap out at very low power levels like 350 and up. just depends on the tune, and a good ole thing called luck. further more, there is NOT a direct relation between hp and boost. i have made probly 330-340 hp on one of my cars at 20 psi of boost, and another one of my cars, since it was using a MUCH bigger turbo and a better motor, was probably making about 480-500 hp. boost does not equal hp ever. ever. EVER. there are too many variables to say something like that.

Quote:
Originally Posted by lazylongboarder
Stock EJ20T - 227 hp, power from 3000 rpm.

Stock EJ20TT - 276 hp, power from 1700 rpm.
unfortunately there are 2 things that are VERY untrue about this as well.

the stock WRX does not make 227hp at 3000 rpms, it makes it at 6000rpms.

do you realize that by saying it makes 227hp at 3000 rpms, you are saying that it also makes 397ft lbs of torque at said RPMs? obviously that is no where near the truth. the stock WRX makes 215 ft lbs of torque at 4000 rpms.

also, by saying that the ej20tt makes 276hp at 1700 rpms is also saying that it makes 852 ft lbs of torque at 1700rpms. remember torque and hp are tied in with one another very closely. infact there is a .1 correlation between hp and torque at the same engine speed.

remember the formula torque=hp*5252/rpms and conversly hp=torque*rpms/5252

i do understand what you are saying that the tt motor spools faster, because its got 2 seq turbos, but the power figures you stated are way off.


Quote:
Originally Posted by lazylongboarder
I got the ej20tt and i'm gonna convert it to a single turbo, with a holset hx-35 from a 2001 automatic dodge cummins turbo diesel. It spools up at 4000 with the 2.0 ltr, and the turbo handles 40 lbs no problem. My good friend runs this setup on his wrx and it pulls harder than most any car out there. The car has built every thing down to the cryo treated crank, sleeved block, forged pistons and ported heads and everything else you can think of. He puts 30+ lbs of boost on 110 for fun and the car is rediculously fast. 0-60 mph in 3.3 seconds...it doesn't have any problems getting through the 1320.
the holset turbo you are speaking of, is actually a HY35 which came on the automatic dodge trucks in 01, the HX35 came on the manual transmission trucks. the hx35 would NEVER spool up at 4k on a 2.0 liter WRX motor. I promise. The HY has a better sized turbine housing, so that one will still spool up better, but still would just about not spool in first gear on a 2.0 liter wrx motor. again I promise. the reason I know, is because I am the guy of whom you are speaking, with the built motor wrx cummins turbo car. do you not check your PMs? i sent you one letting you know who I am like last week. Anyways, about my car, i dont want any miunderstandings or rumors spread about my car either, because someone will call me on it one day, and ill be embarrassed.

my car has an HY35 turbo yes, off of an 01 dodge cummins deisel. my motor is built to the hills yes, and it is an ej25 block not a 20 block. it displaces 2.4 liters, and has raised compression, ported heads, ect ect. there is alot happening inside that motor that helps spool my HY35 turbo. it spools at a very reasonable engine speed, about 4k. but again, its not a 2.0 liter car. the hy35 would not go well on a 2.0 liter stock WRX motor without MUCH lag.

i do not run 30 psi, the motor and turbo could do it and alot more, but i havent. i have never tuned for more than 20 psi ever on this turbo, and 22 psi on my previous garrett T62-1. it is incredibly fast, and really does do 0-60 in the mid 3 second range, but ive never run 110 gas through it, or tuned for 30#s.

lazy, you have some good info, and some bad info, please dont take any corrections as offensive, as they are only intended to help the group.

anywyas, here are a few of the latest pics of the motor in my wrx. and im off to go change the plugs right now. the rain stopped.




Reply With Quote