what size intercooler would be best for stock turbos stock boost and 3 inch exhaust? thanks i currently have a big ol one with 3 inch pipes my boost hits at 3500....
1jz intercooler size
- Thread starter suprashane
- Start date
I would also be interested in this. I have a 31x12x3 intercooler and I've been thinking about going smaller. A lot of the cooler is blocked by the bumper anyways. I have 2.5" pipes with 3" exhaust and stock twins.
2.5" is the way to go for the twins. 3" exhaust is also good
OP - 3" IC pipes are good for big single turbo's. I probably should upgrade mine i have 2.5" pipes with a Big single (T4 T67)
OP - 3" IC pipes are good for big single turbo's. I probably should upgrade mine i have 2.5" pipes with a Big single (T4 T67)
There was a community here in norway many years ago that tried the 2,5" vs 3" IC pipe theory.
It proved that the results where almost identical...
But what they found out, was the use of "90 degree silicone hoses vs Turbolag" had a close relationship.
But for your 3500rpm lag you must have a leak somewhere.... of pretty decent size as well.
I had a 3" long worn hole from the AC compressorweel on one of my IC pipes two years ago, still hit full boost at 3800.
It proved that the results where almost identical...
But what they found out, was the use of "90 degree silicone hoses vs Turbolag" had a close relationship.
But for your 3500rpm lag you must have a leak somewhere.... of pretty decent size as well.
I had a 3" long worn hole from the AC compressorweel on one of my IC pipes two years ago, still hit full boost at 3800.
I have been doing plumbing and heating for a while. And, when I install a furnace, if I add a 90* elbow into the furnace exhaust it is equivalent to about 5 feet of pipe. So adding a 90degree elbow is like adding a huge run of straight piping. I always notice people building cars and using 90s and I know that I try and avoid it with my car.
there may be one the the intercooler. or there looks to be some rubbing on the intercooler pipe hole under the headlight that could be a leak
i would like to save my pennies for this thingy http://store.driftmotion.com/static/i-1jzttmk3ickit.php
Turbo Habanero;1883686 said:
LOL @ your sig.. good times.
Yes, you should do 3" both sides.. we upgraded a few local cars at the shop I used to help out at, and they made more power without sacrificing much response. It was a win/win from all I witnessed..
Hitting full boost at 3500 on stock twins? I gotta ask a couple questions, I have a hunch:
-What altitude are you at?
-Do you still have the stock y-pipe?
I hit full boost about 3000 rpm, usually starts around 2500-2800, but it comes on pretty suddenly, and I'm at 6500' elevation. In Vegas (around 1800' if I remember correctly), I was hitting full boost nearly 1000 rpm sooner. It was ridiculous...
-What altitude are you at?
-Do you still have the stock y-pipe?
I hit full boost about 3000 rpm, usually starts around 2500-2800, but it comes on pretty suddenly, and I'm at 6500' elevation. In Vegas (around 1800' if I remember correctly), I was hitting full boost nearly 1000 rpm sooner. It was ridiculous...
te72;1884936 said:
I live at 7,300' I'm pretty sure I spool so late because I have a 4.30 differential, So the engine revs really fast and the turbos don't have time to spool. I'm also running very rich right now which isn't helping anything.
im in colorado so 5280' stock everything but intercooler and exhaust. could it be a wastegate/ bov thing?
te72;1885103 said:
Sorry, my train of thought didn't really make sense. I mean to say that my boost comes in late in 1st gear because the engine revs too fast. I'm about to pick up some bigger wheels and tires, but with 225's and an open diff my 1st gear is almost useless. I'm either lagging till 3500~4000 or spinning tires. I like all the other gears though. I do drive my car on the highway and I hate it!
I'm at sea level down here in vancouver, BC and I am fully spooled by 3000RPM with a stock 3.73 rear end.
Actually... yes. I remember playing with a neighbor in his LS1 Z28 a few years ago. It seemed to take forever to spool up, much longer than normal. Once it hit peak boost it held ok (and I pulled away because he underestimated me), but... The next day, we pulled off the stock y-pipe and found something interesting. The front turbo's wastegate actuator was missing the clip that holds it to the lever that opens the door. Effectively, this flapping open wastegate door on the front turbo was letting all that air out without really doing anything useful at all.suprashane;1885211 said:
I could see a similar leak from a BOV, but I doubt it would be as drastic.
No such thing as an engine that revs to fast.kelson;1885293 said:
Like I said, your car would be hands down quicker even if I had 30-40hp more. And I know how the 4.30 can be on these cars, I had one on my 88 NA, cruising speed of about 3600-3800 rpm, not much fun.Sea level and it takes that long? I would have figured it would be quicker, unless you have some sort of intake/exhaust restriction... Either that or my memory of lower elevation might be a bit mistaken.MNBmk3T;1885519 said:
Should be a 3.73, but at this point, it could have been swapped out.suprashane;1885709 said: