Top End Rebuild and Turbo Project underway

[les_garten]

Originally Posted by polizei

Thought I'd post some of my engagement pics from last year. I drove the 911 down to South Carolina where my wife was living at the time to get the pics taken, and the photographer incorporated the old p-car

Nice! Car ain't bad either!

[930gt-40r]

Damn Andy- were you guys trying to make soft porn on the Porsche?
Nice pictures!

[polizei]

Originally Posted by 930gt-40r

Damn Andy- were you guys trying to make soft porn on the Porsche?
Nice pictures!

Absolutely. Stage name is Buck Naked.

[930gt-40r]

Gotcha- I was dubbed "Arnold Schwolenpecar"

[polizei]

Another item I need to address with my build is the squat factor. Even with just 10 psi of boost and new rear Sport Bilsteins shocks, the backend really hunkers too far down. I imagine at 16-18 psi, this is going to be even worse! Would changing to larger torsion bars help the squat? Or is another approach recommended?

[930gt-40r]

The cheapest and most effective way would be yes- thicker torsions. You can also do coil overs to the back and use them as helpers to the existing torsions. Or you can scrap the torsions, reinforce the strut tower, and do a coil over setup that has heavy springs. But I am going to go with just doing the torsions as most cost effective

[sjf911]

Originally Posted by polizei

Another item I need to address with my build is the squat factor. Even with just 10 psi of boost and new rear Sport Bilsteins shocks, the backend really hunkers too far down. I imagine at 16-18 psi, this is going to be even worse! Would changing to larger torsion bars help the squat? Or is another approach recommended?

I went up to 26 in the rear and changed from the HD Bilstein to the sport. It made a huge difference. I'm no longer seeing blue sky, I can actually see the road when I hit boost. I had 28's on for a while but they were just too harsh for street driving around here.

[polizei]

Kris and Steve, thanks for the input!

Steve, what's your approximate peak HP? And what brand torsion bar did you end up going with?

[JBL930]

You can add coil overs and keep your torsion bars too! That way you don't have to strengthen the strut towers, and you can quickly change the springs.... I thought quite a few people did that?

[sjf911]

Originally Posted by polizei

Kris and Steve, thanks for the input!

Steve, what's your approximate peak HP? And what brand torsion bar did you end up going with?

IIRC, sway-a-way solid bars. I would have liked 27 but the lowest front bar other than stock was 21 and I wanted a bit more spread in the size so I am actually running stock front bars to reduce understeer. I don't know my HP numbers but I am running 9-10 lbs of boost (0.6 to 0.7 bar) on my 3.2SS. Enough that I can't keep the tires on the road in 2nd and 3rd is a problem in cold weather.

[Flieger]

If you have a race car with those adjustable rear camber boxes, the more you raise the control arm pivot, the less geometric anti-squat (and rear anti-lift for braking) there is.

[klefroid]

Originally Posted by spence88mph

that engine looks amazing! How did he get that finish on the alloy, soda blasting?

Andy, you can get a braided oil line quite cheaply from goingsuperfast or maybe blownsix one or the other. I think it's fouling it more than it should and it is something you want to get right... I backdated my oil lines, feeding it into the case has worked well for me and many others.

(ignore that shield wrap on the oil line, i removed it)

obx...:d

[lr172]

Originally Posted by sjf911

Mine is not a Carrera but I am running a 3.2 intake with 9.5:1 compression. The most boost I have tried is 8lbs with both a full intercooler and meth injection. My intake temps are surprisingly cool (to me) rarely getting over 100F at peak boost. I think the only way to really explore the limit is with an advanced knock detection system and a lot of nerve. I tried the simple knock system available for megasquirt but over about 4500 RPM where I needed it most, it was unusable. If I really wanted to push things I would get the J&S Vampire module. Maybe when the budget allows.

I am also running a megasquirt in my 3.2 carrera (stock 9.5:1). I do not have an intercooler or meth yet (planning one or the other this winter) and run .6 BAR without any noticeable knocking. Can you share what type of advance you run in boost? I taper from 32 down to 19 at 160 kPa. Would love to learn what you have used successfully. I have been afraid to dial up the advance in part from fear of the unknown and part the high MAT values. I get up to around 180 at full boost in the heat of summer.

THanks,

Larry

[lr172]

Originally Posted by sjf911

Hard to tell from the website. It looks pretty much similar to the CoolingMist although I am not certain how the boost/pulse-width injector function works. It still looks like a 2-D map only. You need some other indicator such as RPM input combined with boost or pulse width, or a true MAF signal to generate a 3-D map and tailor your injection. IIRC, the Carrera MAF sensor maxes out at less than maximum mass airflow so may not be usable in this setting. OTOH, I think most meth/H2O injection systems out there are only 2-D including my current setup.

I am running MS2 wiht MSExtra 2.1.0. I added an output circuit to the V3.0 board (simple pull up cicuit with a tansistor in the Proto area) and use the MSExtra Output function to control it. This allows a combination of two variable to activate the circuit. I programmed it to come on at RPM >3000 and MAP > 90kPa. I ran this to a relay that will control a pump for the meth injection when I add it. A nozzle size of 4 GPH will give me a range of 13-16% fluid to air from 3000/90 to 6500/160. Guidelines seem to be 12-25%, so figure I should be good without variable injection.

Larry

[lr172]

Originally Posted by polizei

Hey guys,

Quick update. I started the below thread a few weeks ago to kick around whether I should stick with my Montronic ECU, add a piggyback or go to a full blown aftermarket EMS:

Stick with Montronic or go with aftermarket Engine Management system?

Everyone's input pointed to the convincing benefits of an aftermarket EMS, but the cost of it all made my stomach churn! Fortunately, a fellow Pelican was looking to get out of a complete system that he purchased from Chris Carrol of Turbo Kraft. We were able to strike a deal, so I pulled the trigger on an Electromotive TEC-3R customized by Clewett Engineering. Here are the details of the system:

FS: Engine Management ECU Electromotive TEC3 EFI Porsche - USED

I'm really pumped about this EMS! It's going to solve the issues I've had with my stock AFM and eliminate the cumbersome 964/993 dual head distributor! It will also provide me the capability of running a knock sensor, a 3D map for water/methanol injection (WMI), integrated boost control and of course much more controlled, accurate fuel injection and ignition timing.

I'm planning to have Adam Hennessy (BoxxerSix on Pelican) of Rennessy Fabrication do the install and necessary fab work for the EMS, exhaust, intake plumbing & WMI system. I was initially attracted to having Adam work on my car because of his experience with fabrication and WMI installs on 911s. He's been very patient with me and sympathetic to my budget. He's a very meticulous guy and generous with sharing his knowledge. I'm looking forward to working with him. We're tentatively planning the install for late February/March time frame.

Adam recommended going with the Aquamist HFS-3 WMI system. We're planning to have the windshield washer reservoir feed the system, and we'll be running one nozzle on each side of the intake plenum. Here are some additional details of the HFS-3:

Howerton Engineering Aquamist HFS-3

I've decided to go with a set of headers that fellow Pelican YermanCars used on his beast. The headers were built by AMS of Chicago (Amsperformance.com your Nissan R35 GT-R VR-38, Porsche 911/996/997 Turbo, Mitsubishi Lancer Evolution EVO 4/5/6/7/8/9/X 4G63 4B11, BMW 135i/335i/535i E82 E88 E90 E92 E93 N54, Subaru WRX/STI EJ20 EJ25, , Hyundai Genesis Coupe THETA specializing in sta), and Yerman made over 500 HP on the headers. He's selling because he went twin turbos. Here's a link to some pictures:

FS: 3.2, 3.3 Turbo headers

More to come!

I put a Megasquirt on my 3.2 after having problems with unstable/undesirable AFRs using Todd's chip. Total cost was less than $500 and a fun project. Wiring was unpleasant, but the only real hard work was fabbing up a trigger wheel. on the balancer.

It has given me full control and I am running .6 boost with the stock injectors and a BEGI FFPR. My injectors are running about 80% duty cycle at max and have more pressure in the pump to go further, as Todd suggested to you.

Larry

[911st]

Larry,

Are you saying that at .6 bar you see about an 80 deg rise without an intercooler?

Thx.

[lr172]

Originally Posted by 911st

Larry,

Are you saying that at .6 bar you see about an 80 deg rise without an intercooler?

Thx.

My steady cruise MAT will vary, but I typically see about a 50*+ rise when I go from a temp stable cruise to a WOT run up to 6K. My MAT typically runs 130-150 in cruise in the warm months. Some of this could be the older T04E turbo as well. I have been hanging around researching lately as the seals have gone and burning oil. I am looking for a new or used GT30 or GT35. Would welcome opinions on best mid-RPM performance and quick spool up.

Larry

[911st]

Interesting.

Just a thought but if you are seeing a temp rise at cruse I wonder if the Synchronic BOV might help. It vents the turbo boost at cruse so it can free wheel and reduce exhaust back pressure. With acceleration it slams shut for more instant boost.

[911st]

Larry,

You asked about a fast spool mid range turbo.

I am intrigued by the new Garrett GTX3076R. Compressor wheel is sized between the to small GT30's and big boy GT35's.

It is also part of the new school of forged wheels that are lighter, flow more for there size, and more efficient.

[polizei]

Not all of the funds came together for me to tackle the engine work this year - hopefully next year!

I've decided to move forward instead with the brake upgrade. I figure it's more prudent to do this first before making the car stupid fast! My p-car is up at Specialty Cars in Allentown (Specialty Cars Service Center- Performance Specialists) being serviced and having a fresh set of Continental ExtremeContact DWS tires being centered and balanced. The rears stay the same at 255/40ZR -17, but I'm bumping the fronts from 205/50ZR -17 to 225/45ZR -17. This should add braking capacity.

Towards the end of next month I'll be taking her down to Delaware to Steve Timmins shop (InstantG's Home Page). He'll be adapting a set of 996 Carrera 2 Calipers and installing them in my car - along with new Zimmerman rotors, Master Cylinder, Rotor Cooling kit and Cool Carbon pads. I've been convinced that the 996TT brakes would be overkill and that the 996 NA brakes are probably all I'll ever need. Additionally, the 996 brakes are lighter, have better bias and are less flashy

I'm looking forward to trying out the new bite!