Copyninja Street FD - GT3 Build

[Francob]

Hahah! I know a couple of guys with engines built by my engine builder running 600ish and 600+bhp. One of them is on a large street port with an s366 running shy of 600bhp and another on a extreme bridgeport (jport) studded engine with hkst51rspl turbo running 1.7bar of boost! His low boost setting is 1.4bar

I'm only looking for 450 at the wheels for now.....but as our link ecu's have switchable maps which can be engaged on the fly with a trigger switch I'll def have a big boost map on there for sure just to see where my turbo maxes out.

My low boost was gate pressure of 0.8 bar and made 497 high boost switch was 1.4bar ish and made 600hp. I’ll shout for the same again but if safe to do so would run a little more boost.

 

[Copyninja]

My low boost was gate pressure of 0.8 bar and made 497 high boost switch was 1.4bar ish and made 600hp. I’ll shout for the same again but if safe to do so would run a little more boost.

whats the traction like at both boost levels?

Sounds amazing, you should do the dragy gps runs on both power levels.

 

[Francob]

whats the traction like at both boost levels?

Sounds amazing, you should do the dragy gps runs on both power levels.

My wife bought me a Dragy for my birthday yesterday so as soon as it’s up and running I’ll get timing.

Traction is fine, wide wheels/tyres (265s) and big old turbo means my power band is mostly up too which helps with traction. Peak power is 7500.

 

[Copyninja]

My wife bought me a Dragy for my birthday yesterday so as soon as it’s up and running I’ll get timing.

Traction is fine, wide wheels/tyres (265s) and big old turbo means my power band is mostly up too which helps with traction. Peak power is 7500.

Such a thoughtful wife, she wants to see these dragy gps times too.

Looking at the data you posted of 0.8bar at 497 bhp and 1.4ish bar at 600bhp. I'm guessing these numbers are bhp at the flywheel.

I started looking at my own data at 0.7 bar which made 340whp on Pips Hub dyno. I was meant to get mapped this Friday just gone but pip had to take care of some private matters and we rescheduled for this Friday, so fingers crossed it doesn't snow or anything!

I also recently completed my course in engine mapping and tuning among other things and decided to make a plan of action to see what boost pressure I will need to run to hit my target of 450 whp. The key to getting to a fairly close whp or bhp number is to remember that the target psi is in addition to the 14.7 of atmospheric pressure.

10 psi (0.7bar approx) + 14.7 = 24.7psi which made 340whp at Pips Hub Dyno!

So to figure out what I will make (in theory) at 14.5 psi (or 1bar) + 14.7 = 29.5psi

So if we divide 29.5 by 24.7 = 1.19

340whp x 1.19 = 406 whp at 14.5 psi (short of my target 450 whp)

However, with 20 psi (or 1.4 bar) I should make 477whp so I know I'll need to run upto 1.4bar to hit my target. I was also looking at my fueling and unfortunately I've only got enough to flow 450 whp safely at 85% duty cycle which will be more than enough for me.

I was looking into your numbers as well and at 1.4 bar in theory you should be close to 655 bhp. Iirc did you mention your fueling is holding you back?

 

[Francob]

Yea 600hp fly, was 522 at the wheels.

 

[Copyninja]

Made 383whp at 1bar of boost.

Surprisingly ran out of injectors at 1bar as inj duty hit 85%.

Raising boost to 1.4 bar still eludes me. However, still happy with the performance at 1bar....picked up approx 60whp going from 0.7bar to 1bar...so a fairly decent result going up 0.3 bar. Following that trend going up another 0.3 bar to 1.3 to 1.4 bar should get me closer to the 450rwhp goal.

Could not do any dragy gps runs as it was raining the whole way back but the boost does feel smooth and fast.

 

[Copyninja]

After recently completing a course in engine mapping and tuning. I took the car out to increase the boost to 1.2-1.4 bar (depending where fuel ran out) and noticed on my logs I either have a boost leak or my Wgate is not shutting causing significant lag.

Logging and reviewing data on the Link G4 ecu is truly amazing, you can review issues the "butt dyno" would suggest is not there.
Reviewing the data confirms
1. I am making 1 bar of boost on a T04Z at 5839rpm. If I had a HKS T51r SPL this would make sense but on a TO4Z I expect 1bar before 4krpm.
2. Even on 65% WGate DC I'm getting no increase in boost pressure.

After thoroughly going through all my vacuum lines and BOV in the engine bay I could not find a boost leak, so next step will be to check the lines on the wgate itself and if no obvious damage or leaks there than I suspect my Wgate is either stuck open and not shutting as it should.

 

[Francob]

After recently completing a course in engine mapping and tuning. I took the car out to increase the boost to 1.2-1.4 bar (depending where fuel ran out) and noticed on my logs I either have a boost leak or my Wgate is not shutting causing significant lag.

Logging and reviewing data on the Link G4 ecu is truly amazing, you can review issues the "butt dyno" would suggest is not there.
Reviewing the data confirms
1. I am making 1 bar of boost on a T04Z at 5839rpm. If I had a HKS T51r SPL this would make sense but on a TO4Z I expect 1bar before 4krpm.
2. Even on 65% WGate DC I'm getting no increase in boost pressure.

View attachment 26837

After thoroughly going through all my vacuum lines and BOV in the engine bay I could not find a boost leak, so next step will be to check the lines on the wgate itself and if no obvious damage or leaks there than I suspect my Wgate is either stuck open and not shutting as it should.

I invested in a smoke tester for finding boost leaks, it was the best investment ever.

 

[Copyninja]

I investigated in a smoke tester for finding boost leaks, it was the best investment ever.

That is a very good shout. I tried this stuff and could not find any leaks but I did not get the chance to get the car up in the air and check the lines which go to the wgate. Hopefully get around to it tomorrow.

 

[Francob]

That is a very good shout. I tried this stuff and could not find any leaks but I did not get the chance to get the car up in the air and check the lines which go to the wgate. Hopefully get around to it tomorrow.

I bought one very similar to this, was a similar price too. It’s a bit of an investment but we’ve used it on many cars now and it’s ideal, you find leaks where you wouldn’t even expect it.

https://rover.ebay.com/rover/1/710-...0001&campid=5338477309&icep_item=222032506775

You can get them a little cheaper too if you look around a bit

 

[Francob]

In fact this is the exact one I bought - I can vouch for this one.

https://rover.ebay.com/rover/1/710-...0001&campid=5338477309&icep_item=152246518471

 

[Copyninja]

Boost leak fixed and a successful test run confirms the Garrett TO4Z Turbo is now making almost 20 psi of boost at only 3886 rpm with repeatable performance. Looks like the TO4Z still has surprisingly good response on Tim's monster street port engine and almost comparable to the newer borgwarner turbos.

All that remains to be seen is the power this turbo can produce at 1.4 bar of boost.

 

[Copyninja]

I had some issues with the previous map as I was informed my injectors were running out of duty cycle by 1bar of boost.

I'm a mapper as well and I looked into my injector staging which was not setup correctly by a very experienced mapper. After I corrected this, I had approx 18% more fuel deliverability but also meant my entire map was out.

So I spent yesterday remapping the fd from scratch. I was road mapping so didnt get any power figures. I mapped the car from 12psi wgate pressure to 16psi approx 1.1bar. Got upto 1.2 bar and the car was stepping out in 4th gear around 4krpm to 4.5krpm as it can build boost very quickly but the weather was cold and wet which did not help either. I will try again for 1.2+bar as the weather improves and also get on a dyno to check the power figures.

In the meantime, the fd feels real quick even at 1.1 bar and will get some more dragy gps runs in as soon as weather improves.

 

[Copyninja]

Managed to fix my abs system which has been faulty since 2018; full credit goes to Tim from RX Motors who helped me fix my boost leak and also diagnosed my abs system fault. Looks like my abs pump and abs control unit were both faulty and with those replaced and the abs system is now fully functional. I have more confidence stomping on my brakes in these cold and sometimes treacherous conditions.

This is Tims own semi pp motor running a conservative 450rwhp and revs to 11krpm and does a 10.5 quarter mile. Sometimes I wonder why I played it safe and only went for a large street port. Tims semi pp runs 1.3bar without wmi and on ordinary fuel with premix.

 

[tomCTR]

10.5 1/4 is a quick car! Not hanging about that is it!

 

[Copyninja]

10.5 1/4 is a quick car! Not hanging about that is it!

Yh for sure and its getting a trick DCT gearbox which should make it even faster and more relentless but deffo an impressive time for only 450rwhp. I look forward to mapping this monster in the summer and see what it makes when we up the boost.

Tim knows how to build an engine; his shop FD was running a 8.5s 1/4 mile.

 

[Ceylon]

That FB just doesn't look like it has 450whp, must surprise everyone on the road! It looks so rough and ready but you cant argue with the numbers. Interesting that he's running no filler neck and just using the dipstick tube as a breather to a catch can. Makes sense with the smaller diameter connection. I guess it might have issues on a hard right hander with oil slop but no problem for a road/drag strip car that doesn't see circuit use. Also no intercooler duct that I can see? haha.

Tim's a top bloke, sorted me out when I needed some diff bearings urgently in the past .

 

[Copyninja]

That FB just doesn't look like it has 450whp, must surprise everyone on the road! It looks so rough and ready but you cant argue with the numbers. Interesting that he's running no filler neck and just using the dipstick tube as a breather to a catch can. Makes sense with the smaller diameter connection. I guess it might have issues on a hard right hander with oil slop but no problem for a road/drag strip car that doesn't see circuit use. Also no intercooler duct that I can see? haha.

Tim's a top bloke, sorted me out when I needed some diff bearings urgently in the past .

Yup its an absolute sleeper! The idle might give it away though and yh it could use some TLC but you are right for a road/drag strip car it works. Tim knows what he's doing.

Agree he's a top bloke, sorted out my abs system when no one could figure out how to fix it. The thing he does best though is building high power rotary engines. He's the Rotary Takumi!

 

[Copyninja]

The weather was dry today so I went out and solo mapped the car to 1.2bar and I can confirm its an absolute riot to drive. 4th gear WOT it totally hauls ass, almost scary enough for me to come off the throttle.

Making 1.2 bar of boost by 4krpm and the turbo seems like its awake for a change. Got some final tweaks to do with my boost control strategy and clean up the fueling a lil bit more....but extremely happy with how it feels. Once I dial in the 1.4bar map, i'll get some power runs completed on a dyno near me and get some dragy gps runs in as well.

 

[Skyrexx7]

Boy you a new mapper on the block huh