The preliminary results are in

[koukiKA240]

I made it to the dyno yesterday (monday) for the first time with my built KA-T. Mods: CP 9.1:1 pistonsPauter rodsJWT valves springs/retainers, and camsP/P headsblah blah thats the basics for the motor.

Anyhow the numbers:250hp@5800rpms245 tourque@4k rpms@10psiand a very steady 11.5afr

I had the wrong spark plugs and they were gapped far to wide causing the motor to cut out for a bit right at peek boost.

During one of the 10psi runs the silicone seal around the water pump began to leak a little. We decided to carry on. At 12psi it was leaking more than a little so we stopped and i drove the car home. I got the pump fixed today and will be back on the dyno monday.

I have a JWT Burn for msd 50# injectors and walbro pump. I also have a SAFC and AVCR.

I built the motor in hopes of 350+ hp, the guy tuning it doesnt seem to confident that we will be able to reach that number for some reason, what do you think? And what do you think so far?~Sam

[1WheelWonder]

Killer set up, I think your goal is in the bag. Good work.

[toki]

What are you talking about? Those numbers are pretty poor IMO for a fully build motor with head work. You can get those numbers on a stock motor with 7psi....let alone 10 on a fully built motor with head work and cams. Something is not right, maybe your turbo is huge and not in the sweet spot yet (or you're using a T25 or something and I don't know), but a SOHC with a cam and 8.0 compression and nothing else put down 350/370 at 15psi from a t04e. Thats 100more wheel horse power with less valves and a lower compression ratio. Thats on an s-afc too. from 5 psi.

Sounds like something is wrong with your set up to me.

[Jookmasta]

um what turbo are u using? what are the specs on it? maybe that will better help us understand the numbers you are getting

[koukiKA240]

T60-1.48 ar 52 trim

Keep in mind the afr was 11.5 and required almost no tuning to keep it there, and the bad spark plugs. The turbo spools a lot quicker the higher the boost level we select so i imagine that will help when we turn the boost up as well.

And seeing how im making almost as much tourqe as hp tells me that i have the right size turbo for the motor. I started the project in hopes of similar tourqe numbers for autox and road course.~Sam

[Structure240sx]

jwt tunes arent the best for timing. some only pull 14 degrees at wot. also that turbo isnt alive yet.

my to4b felt amazing at 13psi compared to 9psi. feels even better at 19psi though

[koukiKA240]

isnt the t60-1 smaller than a To4?

And structure, you have 550 injectors right? My MSD 50# should be good for around 20psi right? I always thought with my setup i would run out of fuel before i would run out of air.~Sam

[:: orion ::]

50lb'ers are good for about ~340rwhp...assuming stock fuel pressure of 3bar.

As for your number...maybe a little low for 10psi.

I did 239rwhp with a conservative JWT tune like yours, and 370cc injectors...at 8psi.

My turbo is a T3/T04E, 57 trim, .63 A/R.

And I wonder why your TQ and HP peaks are so low with those JWT cams.

I also run JWT cams, and my peak HP (298rwhp at 12psi) was at ~6700, and peak TQ (274rwtq) was at ~4700 or so.

...

I'm betting it's your mis-matched turbo...60-1 with a .48 A/R is a TINY turbine with a BIG-*** compressor.

Or do you mean a T3 super 60 turbo???

60-1 is a T04S compressor (BIG)...

Clarify that for us...

10psi from a T3 Super 60 and JWT tune...250 is not bad.

10psi from a T04S compressor...not so good.

- Brian

[crzycav86]

I'm gonna make an educated guess and say it's your spark plugs.

Judging from what I've read, the wrong spark plugs on a FI motor can severely limit an engine's potential.

[koukiKA240]

it is a 60-1 i also have a walbro fuel pump

who knows, maybe ive posted this too soon to really tell anything. We were in the process of stepping up boost so maybe the numbers will sound better once we up the boost. seeing how it is dropped compression, my guess is that 10psi on a higher compression motor will go farther than on a lower compression motor. As i up the boost i should see some higher gains am i right? I sure hope so.

And does the fact that i have the walbro pump change your initial guess at 340hp? that sounds kinda low for 50#

and the peak numbers occur so low because the spark plugs were being blown out as the higher boost level was reached. I picked up the correct spark plugs today, one set of plugs was one step colder, the other, 2 steps colder. We can experiment with these.~Sam

Modified by koukiKA240 at 10:38 PM 3/2/2005
Modified by koukiKA240 at 10:45 PM 3/2/2005

[WDRacing]

If your exhaust housing is a .48 AR, then your making good power.

That turbo is really bad choice IMO. A .48 AR T3 Exhaust housing is made for a engine that wants low boost and no lag. By upgrading your valve train and adding cams you increased the engines ability to flow more air, but stuffed a cork into the exhaust stream. Not to mention the fact that those cams should make power later in the curve and not earlier. Your peak numbers should be in the mid 6000's somewhere.

You'd probably gain 20whp by switching turbo's with Orion. I'd go with a T3/TO4E 50 trim .63 AR exhaust housing and a stg 3 wheel.

Just my opinion though.

[:: orion ::]

And does the fact that i have the walbro pump change your initial guess at 340hp? that sounds kinda low for 50#

No guesswork here...walbro pump still flows at stock fuel pressure, it's not a "mod" per se, more like insurance that your pump can keep up with you injectors.

Here's the math:

(50lbs X 4 injectors X 95% duty cycle) / .55 BSFC = ~345rwhp

So ~345 is the *safe* max of 50lb'ers...no guessing.

And I agree with "WD"...likeI said in my first post...that's a weird, mis-matched turbo. Tiny turbine for good spool, but big compressor for large top-end flow...that just doesn't mix.

And we've all seen how well the KA responds to a free flowing exhaust, even in N/A form...imagine how much better it is with 100 more RWHP worth of air trying to get out of the motor!

Basically, running a .48 A/R with a Stg I wheel is the equilvalent of running stock exhaust on a turbo car...

I have to agree with your tuner, there's not a good chance of this setup hitting 350. Change turbos, and VOILA!, done deal.

- Brian

[WDRacing]

People with the name Brian are just wicked smart. Just ask me, I'll tell you I'm a genious everytime.

[koukiKA240]

your math makes perfect sense and everything comes into perspective.

I purchased this turbo a long time ago and dont remember all the specs. the .48 A/R i told you i know for a fact is true, it is stamped on the housing. But i think i have a stage 3 wheel??? (edit: the website says stage V). However the company i bought this and a few other products from, in the end proved to be a rather shady business (IAP) so what i got i am unsure.

The Turbo is a Innovative Turbo Systems T60-1 turbo. He told me the turbo itself was good for 400hp. We discussed over the phone my application and i told him autox and road racing. he brought up the .48 A/R and 52 trim and said that the T60-1 was a good size turbo for my car and the .48 A/R would yield semi qucik spool while the .52 stage 3 compressor would give me the hp numbers i was going for. I guess we will find out. Thanks for the clarification. And i will be sure to update everyone for the final results.~Sam

http://www.innovativeturbo.com...80335 this is the turbo. except i was told i got one custom made with .48 A/R. and unless they used a .63 housing and cast .48 on it i think thats what i have.

Modified by koukiKA240 at 5:07 AM 3/3/2005
Modified by koukiKA240 at 5:09 AM 3/3/2005