Old school B series rebuild - FULL story

[BabyNSX]

Earlier this year I started down the road of rebuilding my aging B18C. The engine had been built in 2007 and with plenty of high strung driving under it I felt it was time to freshen it up again.

Time to get the engine out of there:
IMG_0639 by Baby NSX, on Flickr

Getting the engine out involved dropping the front of the car until the engine sat on the dolly, strapping the engine down, removing engine mounts, lifting the front, and rolling the engine out. Easy
IMG_0642 by Baby NSX, on Flickr

Lets have a look inside:
IMG_0661-2 by Baby NSX, on Flickr

Cylinder walls showed some wear...
IMG_0666-2 by Baby NSX, on Flickr

Yikes... look at these pistons - rebuild just in time:
IMG_20180607_103525 by Baby NSX, on Flickr

IMG_20180607_103433 by Baby NSX, on Flickr

Hey... lets upgrade the suspension while I'm at it:
IMG_1102 by Baby NSX, on Flickr

IMG_1126 by Baby NSX, on Flickr

IMG_1104 by Baby NSX, on Flickr

Might as well clean the engine bay while I can:
IMG_4422 by Baby NSX, on Flickr

My original sleeves have seen enough action... lets do this:
IMG_0744 by Baby NSX, on Flickr

83mm pistons and sleeves installed:
imagejpeg_0 by Baby NSX, on Flickr

Head was reworked by 4 Piston Racing - combustion chamber looking good - had to open it up a pinch for the pistons
imagejpeg_1 by Baby NSX, on Flickr

Look at those ports:
imagejpeg_1-1 by Baby NSX, on Flickr

Engine back from builder (Lawrence Built)
IMG_1582 by Baby NSX, on Flickr

IMG_1585 by Baby NSX, on Flickr

And she's back in:
IMG_1611 by Baby NSX, on Flickr

IMG_5034 by Baby NSX, on Flickr

IMG_5035 by Baby NSX, on Flickr

IMG_5037 by Baby NSX, on Flickr

IMG_5039 by Baby NSX, on Flickr

Time for the first round on the Dyno:
IMG_1797 by Baby NSX, on Flickr

Not a bad result from the first day:
IMG_1813 by Baby NSX, on Flickr

Found a problem with my ignition on the Dyno, so I've since upgraded to Coil Pack Ignition and will head to the dyno for round 2. I believe there is some power still left in there

Build details:

Top end stuffs:
- 4 Piston Racing Outlaw CnC head
- Skunk2 Pro series valves and valve train
- Skunk2 Pro2 cams
- Skunk2 cam gears
- Skunk2 ultrastreet IM
- 4 Piston Racing CnC porting on Skunk2 IM
- Skunk2 70mm TB
- Mugen intake
- Samco intake pipe
- Skunk2 composite fuel rail
- Grams 550cc injectors
- Skunk2 Mega Power Header
- Skunk2 has 3" exhaust

bottom end stuffs:
- Wiseco 83mm 8cc pistons
- Carrillo Pro-A ultralight rods
- 4 Piston Racing high RPM oil pump
- lightened ITR crank
- ATI harmonic dampener
- Aluminum Flywheel

Tuning:
Hondata S300
Hondata Coil Pack Retrofit

[carpayments4life]

How is your Skunk 2 Mega Power header, for ground clearance?
Much street (bumps) scraping?

I have a double core radiator with oem header and like the distance that you have between yours.

[BabyNSX]

Clearance isn't too bad... my car has been lowered about 1" over stock and have tapped the header a couple times. It has developed a small smooth flat that does't look that bad or seem to take away from power.

Here's a picture from 2009 when the header was new and just installed on the car:
IMG_9336 by Baby NSX, on Flickr

[BabyNSX]

Here's a video of the car on the dyno ripping to 8900RPM.

https://youtu.be/OyudroJbifI

Will likely take it a bit higher on the next trip out now that the ignition issues are resolved and we can explore things more completely.

[Dave7CDMTYPER]

Really cool writeup and project. This is probably a dumb question, but it seems like you know a thing or two about cars, why didn't you rebuild the engine yourself?

[coolhandluke]

Awesome! It is helpful to see all of your images and story in one place. Thank you for sharing!

Really cool writeup and project. This is probably a dumb question, but it seems like you know a thing or two about cars, why didn't you rebuild the engine yourself?

Doug has been around a long time and knows his stuff. OG status.

[Dave7CDMTYPER]

Doug has been around a long time and knows his stuff. OG status.

[BabyNSX]

Hehe... I've been around a while but am still learning stuffs as time goes on. I also have great respect for those who have skills in areas where I don't. That is why I'd rather have my engine assembled by someone with plenty of experience putting race engines together. It's not a part of the build were I feel I need to develop specific skills.

I have piece of mind that my engine is properly assembled and that with worth a lot to me when things are flying around at 9000+ RPM.

[BabyNSX]

After a second day on the dyno and with some new additions (coil pack retrofit and new 70mm TB) I've got some new numbers:

Day 2 dynorunShare 2 by Baby NSX, on Flickr

about a 9HP gain from the previous day... not bad and I think the engine is delivering the goods now. only a 1.9L engine with modest compression (11.5:1 CR).

Video of glory run at end of day: https://youtu.be/1_V3xU2Kf5k

[coolhandluke]

Wow! I'm impressed with your numbers, 222/146 will be fun.

What are your first impressions from the coilpacks?