LNF Stock turbo limit
 

What is the hp limit of the stock K04 on the TC's? I'm looking to run a K04 setup as I'm not looking for crazy power.

mid 300's from what I understand

Here's your top 5 from the dyno list.

1. 09whteSSpssssh355whp, 406wtq Verified DYNOmite CP/CD/DP/E/WI/I/IC/T Graph
2. Terminator2 345whp, 375wtq Verified Dynocom T, I, DP, CD, CP, IC
3. 09BlueBaltSS 344whp, 384wtq Verified Dynocom T/I/DP/CD Graph
4. 09whteSSpssssh 343whp/423wtq Verified DYNOmite I/DP/CD/CP/IC/T/WI Graph1 Graph2
5. Projekt 331whp,393wtq Verified Dynojet I/CD/DP/T Graph

Perfect. Thanks!

If you care about longevity of your motor, you'll shoot for 300-310.

Its said to flow ~36-38lbs/min, with a rough HP calc that's about 360-380whp.

isnt 36-38lbs/min 360-380hp... not whp....???
so the drivetrain loss would equal to about 335-355whp???

Was thinking more mid or just below mid 300's, better to go with something else? As I said not looking for 400whp+ like everyone else seems to be. I'd be more than happy around 330whp if thats what I can get...any more than that I'll wait till the next car.

If it was crank HP the highest whp we should see is just over 315whp. I figured about 12% drivetrain loss.

Personally, I wouldn't try to get that much, but I don't drive the car like most folks do. I ring it out on track, where you are constantly hard on the throttle. Unless you're getting chemical cooling through ethanol or water injection, by the time you're pushing 330+ whp, I think the turbo is running out of its efficiency range, very quickly. Can you do it for a drag strip? Sure. Try that out on track, and I think you'll regret it.

Can you read a compressor map? You are making judgements based on what you think, you even said that yourself...

And the thread isn't asking your opinion on the ideal output of the turbo..just the max output ;)

The 10:1 rule of thumb is just a rough estimate and doesn't take much into consideration. Direct injection motors will make more hp at a given airflow than standard injection motors. Higher compression motors will make more hp than lower compression motors. Aggressive tunes will also make more power than conservative tunes. LNF motors can easily make 10 whp per each 1 lb/min of airflow. Then you can switch to ethanol based fuels and improve from there. I would estimate that 400whp is about the max that could be made on an LNF with the stock turbo, fully modded and running on e85.

What he Said ^^^^^^LOL

im pushing 41 lbs/min on my big turbo and when dyno on a mustang dyno i had 331whp/329wtq... thats why i thought it was lbs/min= crank hp

It generally does refer to engine HP, but like I said- It's just a rough guess.

FWIW, your car should make more power than that if it was at 24psi.

yeah i know... we are re-tuning it tomorrow hopefully to add more timing and most likely add more boost... ~29psi may be... we are going to see how it would do with some extra timing at 24psi and then do a selectable tune with 29psi

29psi will be too much. Even with raised fuel pressure, you will be limited by the fuel system at ~28 psi. If you are on stock fuel pressure, then you most likely won't make any more power past 24.

we reised it to 2800

Ok this will be on a completely stock lsj with all zzp piping and 3 inch exhaust front to back....what hp should I be seeing safely?

on 18-20psi of boost you should be around 295-315

Good enough..thanks for the quick answer

In regards to longevity of the motor:

1) Nothing over 24psi, and run a tune that is knock-free and done properly.

2) Treat the car well.

3) What wangspeed said is right. If I had a tune for a twisty track, it would be 20-22psi.

I usually go by whp, theres a lot of factors that affect how hard x amount of psi is on your engine, specifically in my case elevation. I've been out of the turbo thing for going on 4 years now, this is gonna be a good excercise. That being said however the psi its set at it won't be getting hit fully very often.

Matt is have you expieramented with methanol on the LNF's as a fuel source to be able to run the turbo harder. Thats what I had to do on my corvette to get enough fuel to spin it to 7k.

The LNF is a different situation because the mechanical pump delivers more fuel the higher you spin the motor. However, it would still be beneficial to use meth injection if you are out of fuel system. It's just typically in the midrange when the turbo hits full boost that the pump won't keep up.