S38 is loose in the garage

[pamp]

You would need to re-power your boat with a pair of these before I would be much help my friend....

 

[sfdon]

A quick thought for you Mr. Pamp-

Keep in mind that a d-jet manifold
Pressure sensor is properly calibrated
at 0, 12, and 18 inches of hg..

 

[pamp]

No worries....falls within range.

 

[sfdon]

that the 2 stroke engine?

 

[pamp]

yes

EMD 12-645 E7 turbo. 645 denotes cubic inches per cylinder.

 

[nydesmo]

We are working to place the S38 in today. We have a 2002tii booster, but the arm is many inches too short. Any tricks we are missing?

Photo's to come.

Thanks,
Greg

 

[nydesmo]

Yesterday I drove the CS to the shop at 9am to install the S38 ... cannot wait to hear it run in the car. Day #2 - We pulled the 3.3 liter from the CS and placing the S38 into the bay (Day #1 was pulling the S38 motor due to two frozen bolts - manifold & top of trans/motor).

Brake booster - We made the decision to cut the arm off the CS booster and weld it onto the 2002tii booster. The solution worked well and re-installing the brake lines took longer than the cut and weld.


These are our questions from yesterday - your suggestions are invited on please:

1.) Throttle Linkage - The M5 is a wire pull system. Has anyone found an easy connection to the CS firewall throttle arm?

2.) Exhaust & Muffler - I plan to look for a megaflow to run parallel to the drive shaft. Is there a more open muffler behind the diff. someone can suggest? How much louder will a 3" system be than a 2 1/2" and will it generate more hp?

3.) M5 Differential/Rear suspension - We plan to bolt the M5 rear into the CS including its brakes. How much work is needed to make the Diff fit? The M5 (tires 225/55/16 = 25.74") 3.91 diff maybe too low and I've be looking for a 3.45 diff from a 635. CS tires will be 225/50/16 being 24.85" and 205/50/16 being 24.07", aver. 24.4".

--- 3.91 ratio diff / 24.4" tire (Aver. 24.07 & 24.85) height and a .81 5th gear = 3,489rpm @ 80mph.
--- 3.45 diff / 24.4" and .81 5th = 3,079rpm @ 80mph

Referenced for Transmission / Ratio / RPM calculation: http://www.ringpinion.com/Calculators/Calc_RPM.aspx

4.) Front Brakes - The Wilwood upgrade kit has a 11" rotors upfront and so does the M5. Has anyone done an M5 brake upgrade or used calipers from an e28? The 16x7/8 Alpina's arrived last week so the larger diameter rotors will fit.

5.) Tires - Is there a brand/model for 16" 205/50 and 225/50 tires someone can recommend?


Thanks,
Greg

 

[TodB]

tires

loving the Dunlop Direzza Star Specs. Have them on my coupe and my E28. Sticky!

 

[rb1971]

Yesterday I drove the CS to the shop at 9am to install the S38 ... cannot wait to hear it run in the car.

Day #2 - We pulled the 3.3 liter from the CS and placing the S38 into the bay (Day #1 was pulling the S38 motor due to two frozen bolts - manifold & top of trans/motor).

Brake booster - We made the decision to measure and cut the arm off the CS booster and weld it onto the 2002tii booster. The solution worked well and the re-installation the brake lines took longer that we expected.


These are our questions from yesterday - your feedback / suggestions are invited on please:

1.) Throttle Linkage - The M5 is a wire pull system. Has anyone found an easy connection to the CS firewall arm?

2.) Exhaust & Muffler - The M5 headers are wonderful and have a crossover to dual mufflers. I plan to look for a megaflow muffler to run parallel to the driveshaft, is there a muffler for behind diff. more open then stock someone can suggest?

3.) M5 Differential/Rear suspension - We plan to bolt the M5 rear into the CS including its brakes. How much work is needed to make the Diff fit? The M5 3.91 diff maybe too low and I've be looking for a 3.45 diff from a 635 and referencing the gearing through --- Transmission Ratio RPM calculation: http://www.ringpinion.com/Calculators/Calc_RPM.aspx

The M5 had 225/55/16 tires that are 27.04" in height ... Plan for the CS is 225/50/16 being 24.85" and 205/50/16 being 24.07" are much lower and are going to raise the revs.

--- 3.91 ratio diff / 24.4" tire (Aver. 24.07 & 24.85) height and a .81 5th gear = 3,489rpm @ 80mph.
--- 3.45 diff / 24.4" and .81 5th = 3,079rpm @ 80mph

4.) Front Brakes - The Wilwood upgrade kit has a 11" rotors upfront and so does the M5. Has anyone done an M5 brake upgrade or used calipers from an e28? The 16x7/8 Alpina's arrived last week so the larger diameter rotors will fit.

5.) Tires - Is there a brand/model for 16" 205/50 and 225/50 tires someone can recommend?


Thanks,
Greg

1 - We had to do a custom job with the pedal assembly. Pretty straightforward but required some work.

3 - My understanding is that there is significant work required. You might look at Coupeking's site or talk to La Jolla. I'm running a 3.45 right now and get about your estimated RPM at 130kph.

5 - I'm pretty happy with my Hankooks.

What are you going to do to the plenum cover? And how do you intend to pipe air into the plenum?

 

[John Buchtenkirch]

I’m just curious if there’s any information, articles or books available on rebuilding the S38 engine ? I’m enjoying all this S38 swap in information because I’ve got a 91 S38 engine tucked away for future use but it’s got high miles and should be freshened up a bit. Thank you in advance. ~ John Buchtenkirch

 

[61porsche]

A good resource

for S38s is a particular section on the mye28 website.

In general, the upper end is the area of concentration for scheduled or expected maintenance. I assume because there are twice as many parts to wear and presumably an associated cost vs the extra hp.

A general rule of thumb it seems is that at around 100k miles the upper end needs refreshed.