Engine rebuild update
#16
Very nice work David!
Exhaust looks really clean, it'll be interesting to see how it sounds with the burns muffler.
Is that a Bell intercooler with your brackets? How well does it fit under the stock tail? Looks like what I need with my Carrera Intake and stock tail.
Win
Exhaust looks really clean, it'll be interesting to see how it sounds with the burns muffler.
Is that a Bell intercooler with your brackets? How well does it fit under the stock tail? Looks like what I need with my Carrera Intake and stock tail.
Win
#17
Burning Brakes
Thread Starter
It's a Bell core. I designed the end tanks and had them watercut and welded at work. It's a 25 x 10 x 4.5 core and it's a tight fit. The tightest part is the inlet to the intercooler, I had to cut away about 1/2" of sheet metal on the tail.
#18
Burning Brakes
Join Date: May 2005
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Originally Posted by 125shifter
Unfortunately my inlet pipe is difficult to remove since it's bigger than stock. If I encounter problems like this, I'll have to fabricate something for a second dyno session.
Don, when does power start to drop off with the new intake?
Don, when does power start to drop off with the new intake?
According to my calculations, I should be at 900 cu ft per min flow WOT. The IC is rated at 1100.
#19
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125, Excellent work. I look forward to hearing how it runs...keep us posted.
Did you buy new Cylinders, and do you feel 7.7 is the highest C/R you should use?
Thanks, just taking notes for my rebuild!
Leonard
Did you buy new Cylinders, and do you feel 7.7 is the highest C/R you should use?
Thanks, just taking notes for my rebuild!
Leonard
#20
Burning Brakes
Thread Starter
Don, I think your engine is bigger than mine so you should have more CFM at WOT but here are my calcs. Do you see any issues?
CFM = CID*RPM*0.5*VE/1728
My displacement is 3367cc or 205.5ci
205.5*7000*0.5*0.9/1728 = 375 CFM
with 1 bar boost the pressure ratio is 2.0 so boosted CFM = 750
Velocity = CFM/Area * ((1/60)/(1/144)) = CFM / Area * 2.4
Inlet area for my intake pipe = (2.875"/2)^2*pi = 6.492 in^2
Velocity = 750 / 6.492 * 2.4 = 277 ft/sec
CFM = CID*RPM*0.5*VE/1728
My displacement is 3367cc or 205.5ci
205.5*7000*0.5*0.9/1728 = 375 CFM
with 1 bar boost the pressure ratio is 2.0 so boosted CFM = 750
Velocity = CFM/Area * ((1/60)/(1/144)) = CFM / Area * 2.4
Inlet area for my intake pipe = (2.875"/2)^2*pi = 6.492 in^2
Velocity = 750 / 6.492 * 2.4 = 277 ft/sec
#21
Burning Brakes
Thread Starter
Originally Posted by LeonardZ
125, Excellent work. I look forward to hearing how it runs...keep us posted.
Did you buy new Cylinders, and do you feel 7.7 is the highest C/R you should use?
Thanks, just taking notes for my rebuild!
Leonard
Did you buy new Cylinders, and do you feel 7.7 is the highest C/R you should use?
Thanks, just taking notes for my rebuild!
Leonard
I wanted 8.0:1 but the heads and cylinders were already complete when I cc'd everything. Actually I was going to use the Mahle pistons I had but they came in about 7.2:1 so I bought the JE pistons. I didn't really want to cut more off the heads anyway because I was worried about the cam chains. In hind sight I would have had the spark plug holes welded up and used 12mm plugs for both holes instead of just the second one. This would have gained more compression.
#22
Hi DonE, just had a look at your rebuild photos. Phenomenal!! I wish mine looked as factory new as yours does! I'm new to the site, and new to the 930, I bought a dark green metallic '86 930 last November with 115T km on it, I shall have to try and upload a few photos and get some advise from you guys. Cheers
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Thanks for the information 125. I wanted to go the 3.4 route but $$$. Instead I figured I would go with the 3.3s and JEs at about 8.0:1 or even higher. Who did you have replate your cylinders and do you feel the fully finned cylinders are a necessity for longivity?
I like your idea about higher compression. I want to do the same and maybe lower the boost to stay on CIS. Higher C/R instead of higher boost should allow CIS to remain in place, possibly with the fuel head modification. I would like to make the drivability a little better. Right now it is either nothing or everything as far as acceleration!
Thank you for your input....and again great looking engine, It definitely gets me fired up!
Leonard
I like your idea about higher compression. I want to do the same and maybe lower the boost to stay on CIS. Higher C/R instead of higher boost should allow CIS to remain in place, possibly with the fuel head modification. I would like to make the drivability a little better. Right now it is either nothing or everything as far as acceleration!
Thank you for your input....and again great looking engine, It definitely gets me fired up!
Leonard
#24
Burning Brakes
Thread Starter
I finally got the engine harness built. I still have to build the ECU and CDI harness. Here are some engine pics with the intercooler off and a pic of the engine harness:
#28
Racer
Join Date: Feb 2005
Location: Orlando, FL: Treasure Coast, FL
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Fine work on Black beauty. Two years, huh? I guess we have to operate in parrallel with our projects to gets a few project completed yearly(biannually). I mean just regular maintenance and detailing often means need more than one car.
Regards,
Bernard Reyes
Regards,
Bernard Reyes
#29
Rennlist Member
David - That is simply incredible...your fabrication and bracketry is excellent (even thought I know you are very humble about it). I looked at your pics over and over and I am very impressed and envious. The engine will definitely surpass your HP expectations.
Congrats...your 2years of effort was worth it.
Yasin
Congrats...your 2years of effort was worth it.
Yasin