930 Engine rebuild done
 

Engine is back in. After the break-in, I'm going to dyno it.
Mods:
K27 11/11 Turbo
964 cams
ARP head studs and rod bolts
36mm port
Imagine Auto fuel head
Powerflow intake
goingsuperfast.com headers and full bay intercooler
C2 by-pass valve assembly
Nology wires
Borla exhaust
1 bar boost

Photo Album: http://photos.yahoo.com/nsxtc


http://forums.pelicanparts.com/uploa...1142703994.jpg http://forums.pelicanparts.com/uploa...1142704007.jpg http://forums.pelicanparts.com/uploa...1142704021.jpg

Looks great! I'm starting final assembly on mine today! Got all my parts back yesterday from Neil Harvey of Performance Developments! I can't wait!

Final installation pic. Started up with no problems. Smooth as a baby bottom. Had a little tick-clack-clack...turned out I forgot to torque down one of the header bolts. Whew

Special thanks to:

Henry Schmidt of Supertec for his guidance on sealing the case and that all important number 8 bearing. I used 4 different sealants/lubicants just for the case alone. No leaks!!!

Wayne's book. No way I could have done this w/o it

Pelican forums. Kept referring back to this site for Q&As

Brian Leask for helping me with the engine installation, tuning the fuel system and building me a fully adjustable WUR.


http://forums.pelicanparts.com/uploa...1142718950.jpg

Beautiful! Good job, I can't wait to finigh my 3.2 Carrera complete rebuild! I have the same exhaust, brand new, let me know how it sounds.

Best Regards,

Alex
orozcoa@earthlink.net

Took it out for a drive. crazy...boost builds up FAST. Haven't done any WOT runs, but around 2800, it's already at .5 bar. Around 3100, it's .8 bar.

The Borlas are deep and throaty. Can't wait to hear them at WOT.

The surrounding environment is hotter though. I guess the headers w/o the heat exchangers really heats things up. I notice my bumpers are much hotter also. Could it be that the Borlas are thinner and have less baffle? I may have to modify the bumpers by drilling ventilation ports and covering those with mesh.

I'm getting 14.5-14.7 AFR at idle. When boosts build, it goes down to 13.5ish. At one point, I reached .8 and it looked like I got around 12.5. So Brian Leak's adjustable WUR really did the job.

Excellent work!!! That is a beautiful engine. I'm in the final stages on my 930 build, too. I'm using the same intercooler, cams, a K27-7200 and megasquirt for ignition/fueling. It was nice to see a similar looking engine and to hear that it runs well!

Let us know how the dyno goes.
Mike

The engine looks great, nice job on the details. Life sure is much easier with an LM1, especially for us turbo guys:)

Im just curious why you didn't twin plug your engine. I am in the process of rebuilding and I am on the fence with twin plugging it.

Nice job Hope mine comes out that nice.

porschett:
Wouldn't the engine sound better without the Borla and just run a "J" pipe straight out of the turbo; imagine the flames (may also run cooler bumpers).
j.p.

That's what I'm doing! Mine is sitting on the workbech just begging to be installed on my turbo!

You mean a Zork tube? Yeah, I was pondering on that too. I haven't heard one live except the for the vid on fabspeed's site. I like the sound, but don't know if it'll be too loud. I have a buddy that's going to try and I'll wait for that.

I didn't twin plug cause the bang-for-the-buck factor wasn't there for me.

Great looking engine. Nice job

One thought, the intercooler braces you attached to the sheet metal will fail very quickly.
A better idea might be to attach them to the engine mount (cross brace) using a vibration isolator so that failure do to cooler vibration will be reduced.
Angling the braces towards the center will help to prevent side to side movement as well.

I have been considering the twin plug not so much as a performance enhancement, but more as extra safety precaution against pre detonation.

I sent Henry my distributor for the conversion. I realize that it may
be overkill but like the reassurance that i've taken the necessary steps to keep it all together.

Your engine looks beautiful, job well done.

Yes, preventing predetonation is a good precaution and if I had extra the funds during the rebuild, I would have gone down that route. But I figure with the fully adjustable WUR, my LM-1, full bay IC, and mixing 100 octane hopefully will all but eliminate predet.

Thanks guys for all the comments.

In response for a request of a bigger pic of engine bay...

http://forums.pelicanparts.com/uploa...1142824462.jpg

Looks fantastic...job well done.

porschett ,
looks like you can eat off that IC, wow beautiful, by chance, is that original paint? nice incredibly deep gloss you got there:)

Thanks diabolos, Haven't done anything to the paint. Just used clay bar on it once. Kept it up with teflon and light dusting after a drive.

how is it driving? do you like the difference in power now as compared to before? How do the headers and muffler sound? I'm curious to know what the exhaust setup you went with sounds like as I myself am in the market for headers/muffler. Can you post a mp3 for us?

The Borlas run hotter than my previous exhaust (Monty). I think it's because the Borla is a lot lighter (read thinner) and doesn't have as much glass packing. It sounds nice at idle and not to loud. Didn't take note of it under boost as I was busy reading the AFR and listening for other things. I'll have to make a mental note next time I drive it.

Right now, the muffler is off and I'm putting in heat shielding everywhere under the bumpers and tin.

The boost spools up a lot faster and virtually no lag. That's the biggest difference I've notice with the headers.

I haven't fully broken it in yet and can't wait do to a WOT run. I'll try to do a sound track when I do.

so then you like the goingsuperfast headers, but do they only come without heaters or did you just opt to go without them?

You mentioned it feels as if you have zero lag, but you went with a full wing intercooler, this is usually a good mod to do basically if you convert the car to Carrera 3.2 intake manifolds & EFI. Bigger is going to be better in the case of an intercooler but as you increase the geometric volume of the intercooler you decrease the dynamic responsiveness of the turbo(lag). This will of course be offset if you are running higher than 1.0 bar bost levels. Kudos to you for making it work for you.

post a sound clip if you can:) once again congrats on a job well done!

When are you going to put it on the dyno? I'm curious to see your results.
Pat

I'm just about finished tuning the AFR using the LM-1. I'm shooting for mid of next month when the engine has broken in. I'm really curious as well. Will keep everyone posted.

Here's two sound bytes of the Borla exhaust. One at idle and one at 3K cruising. Didn't notice any resonance. Haven't gotten a chance to do one at WOT as I'm still tunning the AFR.

It turned out that the 'more than normal' heat wasn't due to the Borla, but my advance/retard timing was way off (a lot of retard).

Borla at Idle


Borla at 3K Cruising

nice exhaust tone:) any progress with your tuning?

Well, good news and bad news...

Bad news is I had to drop the engine again...good news is the engine is making too much power for the stock pressure plate and above 5K RPM, the clutch slips like crazy. So I had the Pressure Plate clamping force increased to 3800 lbs.

Now, it sticks like glue. Just had the rear dropped 1.5" because all the weight I took off when I did the engine raised the rear that much. Car is now corner balanced and cross weight is 50%. The car weighed in at 2770 lbs. with 1/2 tank of gas!

Took it for a sprited drive with the PCA of San Diego this last Sat. It handles as good as my previous NSX, but with a lot more power. This thing is a blast to drive.

Next week is dyno time! BTW, there are no engine leaks! :D

thats incredibly awesome:) It sounds like a bunch of fun! so tell us what you took off the car to lighten it so much? That is alot to drop especially in the rear, wow. At 2770, you removed 225lb? correct?

any more pics? I really like your color scheme too.

Here's what I took out:

heat exchangers and assoc. plumbing (Heavy!)
by-pass assembly
stock air box (repl. w/ Powerflow unit w/ custom air funnel)
air pump and assoc. plumbing
iron PP (replaced with Al. Pressure Plate)
a/c pump
a/c hoses
a/c condensor
stock engine padding (replaced with lighter foil ones)
AAR/AAV/Idle Control Valve and assoc. wirings
steel bumper (replaced with 965 FG bumpers)
steel deck lid (replaced with 3.8RS FG lid and wing)
rear speakers and sound pad


Looking to replace the steel rockers and power seats for more weight savings.

Pumping my tires with Helium! ;P

One really cool thing I notice (no pun intended)...After a drive, I felt the IC to check the temp. On the left side it's warm to the touch (say about 90-100?), but as I move my hands to the right, in the middle it starts to get cool and to the far right, it's actually cold (<70?)! I'm gonna find a pyro meter next time. Whatever the temp is, it's a big difference from turbo inlet to TB inlet. Whereas with my half bay IC, I barely notice the temp difference it was always very warm to the touch.

Very, very nice with excellent and detailed pics. Your project really inspires the rest of us who are struggling to finish with lack-o-funds and/or lack-o-time.

Renewed hope is here!!

Correction: 2770 lbs w/ half tank of gas AND a 20lbs. Halon fire extinguisher under the seat. A full tank is about 14 gal? Figure 7 lbs/gallon = ~50 lbs + 20 lbs for the FE = ~70 lbs. So car is ~2700. Woohoo.

that is totally cool. Looks like I'll be following in your footsteps. Are the wheels you have lightweight as well?

great stuff, well done with the rebuild. how did you find using the lm1? easy to use? and how about the quality of the ic? im looking at the same unit...

The LM1 is very easy to use. Just plug-n-play. The fine tunning is a different story. Took a while to get the idle afr to 14.5, cold startup to 12.5 then settling to 14.5, and boost pressure to 12.

So far, there's no problem with the IC. If you're going with this route, you might need a different tail to accomodate IC 'hanging' out the back and fabricate custom tubing to the TB. I have an extra 45 degree tube I made just for this purpose. If you need pics, let me know and I'll snap some.

cheers fella

Updated dyno results...

http://forums.pelicanparts.com/porsche-911-technical-forum/289948-87-930-engine-rebuild-dyno-results.html

Very , very nice!!