Turbokraft takes the RWB to the next level

[Mr9146]

Still waiting for dyno results and some sort of conclusion to this one...

[K24madness]

Such a great build! Props to Turbokraft for craftmenship and innovation!!!

I want to address comments from those that asked about "price per HP". First off it's not cheap. If you're looking for bang per buck this is not the route for you. On the other hand just having someone willing to design/manufacture this type of setup is amazing. I am sure he's not killing it on each build. Heck it probably does not make business sense. This is more a pursuit of passion. If he invested similar resources into another field the returns would be far greater. I for one am greatful for Chris's undertaking. I spoke to Chris and found the prices fair. I plan to pursue the ITB's and IC as soon as cash flow recovers.

[TurboKraft]

Originally Posted by K24madness

Such a great build! Props to Turbokraft for craftmenship and innovation!!!

I want to address comments from those that asked about "price per HP". First off it's not cheap. If you're looking for bang per buck this is not the route for you. On the other hand just having someone willing to design/manufacture this type of setup is amazing. I am sure he's not killing it on each build. Heck it probably does not make business sense. This is more a pursuit of passion. If he invested similar resources into another field the returns would be far greater. I for one am greatful for Chris's undertaking. I spoke to Chris and found the prices fair. I plan to pursue the ITB's and IC as soon as cash flow recovers.

Thank you, sir!

Yes, could make much more money doing regular service jobs, all-stock engine rebuilds (yes, we build all-stock engines, too!), and simpler hot-rod engines.
But the challenge was thrown down, and the geek mech-engineer in me couldn't resist picking it up, so here we are.

Originally Posted by kenikh

I stand by 701 BHP, assuming 1 BAR.

Very good, sir, quite close but a touch on the low side. :-)


A few unexpected setbacks -- first engine case we ever assembled and had an oil leak, dammit! -- but we're approaching the end of what became a *complete* mechanical rebuild of a 1989 C4. We're really looking forward to handing this back to the owner, seeing what he does with the interior, then watching for videos of him driving the hell out of it!

[flashgordon64]

Hey Chris, What's the latest on this thing?

Mitch

[TurboKraft]

Hi Mitch,

Kudos seeing your long project through to the end! She's a stunner.
I'm sure you had plenty of those "what the ___?! moments of frustration building your car -- we have too.

In many ways this is the toughest car we've ever built. 20 pounds of stuff being packed into a 5 pound container, and still trying to make it reasonably serviceable. Some days I thought she was trying to kill us!

And it is unbelievably frustrating when a proven recipe, a known procedure, inexplicably doesn't work -- Murphy's Law, right?
Well Murphy reared his ugly head repeatably and in unpredictable ways:
* only 964 engine we've built that had a leak from the case. This was around the #8 nose bearing. Sonofa... remove from AWD chassis, full tear down and reseal, re-time big cams, reinstall, re-synch throttles...
* same hall-effect sensor we've used on dozens of other engines wouldn't work on this one, regardless of gap, voltage, etc. Manufacturers were stumped.
* same fuel delivery system we've used successfully on other 964/993 builds to fuel 700+whp, but this wouldn't exceed 670-680awhp.

We worked through the issues, no more leaks, clean signals and smooth running to past redline (>7,500rpm), and plenty of fuel delivery.
A few weeks buttoning up a laundry list of small items on the car, and finished dyno tuning Monday. Ultimately, she delivered the goods:

755awhp / 644awtq on ethanol
677awhp / 525awtq on gasoline

Very conservative timing numbers.

Not too much to see with that big IC on top:

[Pat RUFBTR]

Hello Chris,

With a single ECU (serial AEM 2) can we use two fuels (E85, SP91)?
Two ECU AEM, one for every fuel are needed?
A warm congratulations for this magnificent Porsche!

Patrice

[flashgordon64]

Oh man, I feel your pain. Chris I can tell you there were many a day when I was like "WTF is going on with this thing, I must be cursed." Some days I just wanted to give up but just decided to walk away and take a break instead. Well you know; you were on the receiving end of a few of my calls. Anyway, it's like you said we just push on and in the end it all seems worth it...I think lol.

So Kudos to you and your team. You always deliver the goods while giving us the good and bad. For me I'm a DIY'er so I know it was especially tough for you guys dealing with the set-backs of a proven formula.

Chris(between me and you), I should've followed my gut and sent you the car, but like always : lifes lessons are always the toughest lessons. If there's a next time for me I'm coming to turbokraft

Congrats on another awsome build

[TurboKraft]

Just a little ol' '73 RSR backdate with 934 flares...









Almost *complete* vehicle mechanical rebuild: steering rack & lines, all front & rear suspension bushings & bearings, differential & transmission & LSDs, engine, brakes.

Progammable air ride suspension, too.

Alcantara headliner installed while all the glass was out.
The owner is doing a full interior back home by his local upholsterer, sure to look really nice.

[kevin930t]

Amazing numbers and being all-wheel drive to boot congrats to you guys and your customer just hearing about a oil leek after all that effort makes me want to cry dont no how you handled that?

Sent from my SM-N910T using Tapatalk

[flashgordon64]

Originally Posted by TurboKraft

Just a little ol' '73 RSR backdate with 934 flares...









Almost *complete* vehicle mechanical rebuild: steering rack & lines, all front & rear suspension bushings & bearings, differential & transmission & LSDs, engine, brakes.

Progammable air ride suspension, too.

Alcantara headliner installed while all the glass was out.
The owner is doing a full interior back home by his local upholsterer, sure to look really nice.

Now that is the business

[TurboKraft]

Originally Posted by Pat RUFBTR

With a single ECU (serial AEM 2) can we use two fuels (E85, SP91)?

Hi Patrice, thanks for the kind words! Yes, you can use just 1x AEM Series-2 computer. The last version of the software + firmware allows for a standard flex fuel sensor (aka ethanol content sensor) to be installed. Then you can offset your gasoline tune as needed (injection, ignition, boost, etc) based on the percentage of ethanol present. We usually tune with motorsports grade e98, knowing that there's almost always some residual gas in the system that dumbs down the ethanol percentage. As long as we end up with at least 85%, it's a "go" on the dyno. The blending tables back down to gasoline values are set up next. That way a customer is covered if he gets "real e85" from a motorsports fuel vendor, or if the "e85" out of his local filling station is really e72.

Originally Posted by flashgordon64

Oh man, I feel your pain. Chris I can tell you there were many a day when I was like "WTF is going on with this thing, I must be cursed." Some days I just wanted to give up but just decided to walk away and take a break instead. Well you know; you were on the receiving end of a few of my calls. Anyway, it's like you said we just push on and in the end it all seems worth it...I think lol.

So Kudos to you and your team. You always deliver the goods while giving us the good and bad. For me I'm a DIY'er so I know it was especially tough for you guys dealing with the set-backs of a proven formula.

Thanks, Mitch! I like to post some of the bad with the good, give people a realistic perspective on building / rebuilding a car.
Even all-stock, there's going to be pitfalls: quality of genuine Porsche rocker arms, for instance -- junk.
Now make the car high performance and highly custom, and you can be assured there will be things that don't fit as supposed to or work as supposed to.

Stay positive, persevere, and try to learn from every job.
That's my take on it.

[Pat RUFBTR]

Hello Chris and thank you ! This sensor AEM PN: 30-2201 (-6AN) ?

Frankly, I would live next to at your home(with you) that would be much simpler for me to develop a great EFI E85 system. Little by little I gather(combine) at best the information (better sensors / probes, coil kit Okada plasma PD6002106R, ID1700S ect ect) and when I shall be sure in 200 %, there, I shall act.

[Mr9146]

Nice to see it finished.

It's not exactly my cup of tea looks-wise, but you can't argue with the spec sheet. I hope it drives great and the owner uses it until the wheels fall off.

[TurboKraft]

Originally Posted by Pat RUFBTR

Hello Chris and thank you ! This sensor AEM PN: 30-2201 (-6AN) ?

Hi Pat, yes that is the part number for the ethanol content sensor.
ID1700 = incredible injectors
Never used the Okada products, but as long as they don't give off a lot of noise then you should be fine. 6x / 12x coil-on-plug is no problem.
You are always welcome to email us, we'll give you a list of the parts you'll need to do the job correctly and completely the first time.
We may be able to help you with the tuning and configuration as well, ex: use TeamViewer to remote access your PC when tuning.

[Pat RUFBTR]

Originally Posted by TurboKraft

Hi Pat, yes that is the part number for the ethanol content sensor.
ID1700 = incredible injectors
Never used the Okada products, but as long as they don't give off a lot of noise then you should be fine. 6x / 12x coil-on-plug is no problem.
You are always welcome to email us, we'll give you a list of the parts you'll need to do the job correctly and completely the first time.
We may be able to help you with the tuning and configuration as well, ex: use TeamViewer to remote access your PC when tuning.

Thank you Chris,
We already contacted and you had even drawn a picture for me !
I did not handle the combustion chamber with it céramic to avoid the strong corrosion of the ethanol, I should rather turn on ID1300 to have the choice of the fuel ( SP98 / E85), my engine is already closed.In the next opening I shall make certainly the ceramic treatment(processing) and at the same time I shall pass of 3.456L in 3.6L. I also hesitate between the serial AEM 2 and the AEM infinity 6, in brief I shall contact you certainly by email, thank you again.

Pat

[K24madness]

I was in Arizona last week and had a chance to see this beauty first hand. It's one of the few cars that's more impressive in person than photos. It fired right up and idled better than my car with conservative cams.

I am no stranger to high end fabrication shops, I currently reside at Sonoma Raceway among the race shops so I am not easily impressed. I will say TurboKraft is right up there with the best of em.

I plan to use TurboKraft for some upcoming mods. I LOVE what they've done with the ITB's/Intercooler. By far the best execution of the concept yet! Based on what I've seen it's well worth the cost of transporting the car back and forth.

[TurboKraft]

Originally Posted by K24madness

I will say TurboKraft is right up there with the best of em.
I plan to use TurboKraft for some upcoming mods. I LOVE what they've done with the ITB's/Intercooler. By far the best execution of the concept yet! Based on what I've seen it's well worth the cost of transporting the car back and forth.

Thank you very much, sir! Good to meet you in person, looking forward to working with you on your Turbo.