Maybe

thewird

 

Good job man! I am in the same boat.

 

Me three, was 263 now 233 and dropping, going for 215-219 area... Good luck all

 

ROFL on this dyno sheet. For anyone who has operated a dyno sheet you will see where the bullshit lies in that sheet. Those graph lines seem to jump dramatically even at low speed. Wonder how you get such a big increase at 2000rpm ROFL.

PEOPLE DONT BLAME THE DYNO. Blame the Dyno operators. This is where the issue is. I deal with it on a weekly basis where BIG name shops are fudging numbers. GT35R making 400rwhp through an auto on 15psi. ROFL. Barely make that with a manual.

 

https://www.rx7club.com/canadian-for...9-psi-1000231/

Since we see how the Germans convert HP. Here's is some insight to the Canadnadian way. Seems there is alot of guessing goin on both sides of the pond.

Now adding some tnt..

 

No way you made 506whp@17psi on a 61.4mm compessor wheel. NO WAY!

Try around 400whp with a ported motor.

 

I didn't realize correcting for a fixed variable like RPM using datalogs was the same as guesstimating an extremely dynamic variable such as drivetrain loss.

On a side note, that car is currently running 24 PSi on the circuit with power unknown

thewird

 

mmm... 24 psi on 67mm turbo feeding a Bridge port. Thats gota be a fun...

 

https://www.facebook.com/photo.php?f...type=1&theater

I don't have a scan of both complete pulls overlapped. But the T4 1.06 GT35R with w/g boost controllers maxed out was 28PSI. This was a race gas with 12:1 AFR too, only made 478rwhp, and 420rwtq.

On a side note our TD61 made more hp/tq @ 5 less psi. Turbine wheel is just too small for boost pressures above 18psi on a GT35R..

 

Do you have a dyno sheet of the TD61 and 35r ran out to at least 8,000rpm and the boost plot? Just curious? As the ones posted only go to 7,000(68mm) and 5,500(p-trim 72mm??)

 

Gt35R with a 1.06 T3. Large streetport, preturbo 50/50 meth.

454whp / 390ftlbs @23psi..... 90F deg ambient temp

The first pull was at 17psi.

 

^ thanks. I have a t3-35r and run it at about 19-20psi. Never dynoed it.

Curious to see a p trim with the same compressor wheel runs up to 8,000rpm.

 

It should be a bit more robust. Been contemplating moving to a T4 myself. The T3 does spool really quick, and I am pleased with the overall power. But the T4's have the breath for 25+ psi. I'm sure my EGT's and emap would get dangerous in that region.

Likely move to a 40R or a TO4Z one day.

 

It still has the same 68mm exhaust wheel t-3 or t-4, thats the choke, plus the compressor is about done as well.

Have you considered the 67/94mm billet wheel... in a gt42 frame. Should be a monster but still spool quick while keeping back pressure down.

Garrett GTX4294R 67mm Drag Race Ball Bearing Turbo - Evans Tuning Online Store example

 

Or the bws400sx 67mm.

 

Been looking at my options. I may be sitting tight for awhile. Starting to think I need a new CHRA. Probably send it in for inspection/replacement this winter as I am revamping some engine bay work.

It's funny, every time I think of going with something bigger, I remember that my street car already has traction issues with 285's.....lol.

 

I remember making somewhere between 510~515hp with a GT35r T3 about 4~5 years ago..
Boost was about 22~23psi..

Motor was a bone stock FD motor...

 

https://www.rx7club.com/single-turbo...3-dyno-746924/

Now post 8 in the thread I linked above, you said you converted them to dyno jet numbers and the dyno dynamics numbers were 435... The saga of dyno racing continues...

 

Don't we all love it when the numbers are changed to say its something else.

thewird

 

Car went 10.6 at 132 at roughly 2900lbs so you do the math

 

"Car weighs 2590 lbs. 2760lbs w me in it."

^ Post 32 from the same thread.

Math= 10.8@435rwhp 2780lbs 10.2@515rwhp 2780lbs.

I respect the 10.6@132. He's driving very well. Traction comes to mind

 

wasn't sure if it was 2800 or 2900 my bad... it was years ago...

but regardless seems this thread is already full of know it all's so I will be leaving..
you just reminded me of why i don't even bother with this place.

Btw when using formulas to predict power it's better to use the speed and weight since Et's can vary greatly at same power level.

Have fun...

 

Turblown Built TD61 FD3S @ 22psi - YouTube

Came across a turblown td61 dyno but its only reved out to 7,500rpm. Seems like boost was starting to taper off a little bit above 7,000 rpm as was power.

I noticed the A/f ratio went from high 11's to 10's as power dropped. I wonder if it would carry more power if the fuel stayed leaner??

Seems the ptrim wheel doesn't make that much of a difference @ high rpm compared to the t-3 35r...when you compare it to xlr8's and enzo's dyno plots...

 

How many whp would a GTX35R 1.06 T4 make @ 17-18psi (with and without 50/50 meth) on a stock motor? I am aiming for 430 - 450whp (500+ flywheel hp) and I know this turbo can do it but just not sure if I need to run more boost.

 

FUnny...... Those calculators claim my car had 350hp @ flywheel......
22psi on a 67mm turbo with a perfect compression street ported 13brew.

105hp gain over stock with 12more psi and a turbo that flows........
Yea i think not