B30 redblock Big Bore Head Gasket

neildrake · 10-10-2019, 02:43 PM

A couple years ago I worked with Cometic to make a head gasket suitable for up to 93mm bore for my B30.
Finished the engine early this year and ended up with a 92mm bore and 6mm stroked motor which yielded approx 3.5l.

Cometic Part numbers are:
0.043" Thickness - PN H3270SP1043F
0.059" THickness - PN H3270SP1059F

Used an off the shelf Wiseco forged piston and Nascar Carrillo rods. Had to have crank welded, narrowed rod journals and reground to smaller diameter journal to accomplish but was happy with results.
https://www.youtube.com/watch?v=cV-Q1NaQOZk

Neil

dl242gt · 10-10-2019, 03:29 PM

Sounds great! Looks like it's going to be a lot of fun in a car that barely weighs more than the engine.

hiperfauto · 10-10-2019, 03:36 PM

Sounds awesome! It revs quick for a B30. What's the compression ratio?

What kind of car is it in, a Marcos?

NVM, I just saw your user profile:

Quote:

Your Ride
Marcos 3000GT - 1970

oemoilleaks · 10-10-2019, 06:53 PM

SOUNDS AMAZING!!! What is that gauge that's just floating there above the manifold?

JohnMc · 10-10-2019, 07:28 PM

Awesome!

doucheNozzle · 10-10-2019, 09:19 PM

That's pretty damn rowdy

oldschoolvolvo · 10-10-2019, 09:27 PM

neildrake · 10-10-2019, 11:11 PM

Compression ratio is 11:1.
It picks up revs so quick mainly due to the lightweight flywheel and clutch. Turns out that a tilton 153T nascar flywheel for small ford will bolt to B30 with a few mods. Rods and pistons are a fair bit lighter than stock also.
The extra gauge was just oil pressure temporarily zip tied to intake during break in.

brian smith · 10-11-2019, 10:17 AM

Awesome result, thanks for posting both the info and the video.

vwbusman66 · 10-11-2019, 12:11 PM

Wow.
Just wow.

JohnMc · 10-11-2019, 12:12 PM

Hopefully you dyno it at some point. It always seems like the B30 doesn't 'scale' as you'd expect from a B20, but then people rarely go all out on a B30 build.

OttoB · 10-11-2019, 04:55 PM

I got something like 185 hp out from my B30E with K-cam style camshaft, but it is not fully sorted out. Max torque comes in quite high rpm, so I might be cam timing issue or exhaust tuning thingy. I got std B30 E moose horns as exhaust manifolds
Before dyno, GT power simulation was made, giving quite close same performance results as dyno.

Tfrasca · 10-11-2019, 07:28 PM

That is bad ass. What kind of power does it make?

neildrake · 10-11-2019, 07:36 PM

I’ll post after it runs on dyno. Right now I’m gettin break-in miles on it before putting the second valve spring in. Also working on an FI setup. Weber’s are great but think I can do better.
If someone can tell me how to post pics here I can show some more detail. Also running a quaife sequential gearbox that’s pretty fun.
Neil

klr142 · 10-16-2019, 02:28 PM

Beautiful! Looking forward to hearing and seeing more.

10-10-2019, 02:43 PM	#1
neildrake Newbie Join Date: Jan 2018 Location: San Diego	B30 redblock Big Bore Head Gasket A couple years ago I worked with Cometic to make a head gasket suitable for up to 93mm bore for my B30. Finished the engine early this year and ended up with a 92mm bore and 6mm stroked motor which yielded approx 3.5l. Cometic Part numbers are: 0.043" Thickness - PN H3270SP1043F 0.059" THickness - PN H3270SP1059F Used an off the shelf Wiseco forged piston and Nascar Carrillo rods. Had to have crank welded, narrowed rod journals and reground to smaller diameter journal to accomplish but was happy with results. https://www.youtube.com/watch?v=cV-Q1NaQOZk Neil

10-10-2019, 07:28 PM	#5
JohnMc PV Abuser Join Date: May 2004 Location: St. Louis	Awesome! __________________ '63 PV Rat Rod '93 245 16VT Classic #1141

10-10-2019, 09:19 PM	#6
doucheNozzle Newbie Join Date: Feb 2009 Location: The Pitt, 15147	That's pretty damn rowdy __________________ '93 944 T - #TrophyVo '00 XC70 SE - Slow '04 V70 T5A - Feels Fast

10-10-2019, 09:27 PM	#7
oldschoolvolvo Board Member Join Date: Mar 2004 Location: Lancaster, PA	__________________ -Mike ~~1998 V70 T5~~ 1979 242 DL 16v \|Feedback\|

10-11-2019, 10:17 AM	#9
brian smith Board Member Join Date: Nov 2010 Location: N.Y.	Awesome result, thanks for posting both the info and the video. __________________ the howdeedoo: http://forums.turbobricks.com/showthread.php?t=288872

10-10-2019, 03:29 PM	#2
dl242gt Happy playing the blues Join Date: Jun 2002 Location: S NJ, a suburb of Phila.	Sounds great! Looks like it's going to be a lot of fun in a car that barely weighs more than the engine.

10-10-2019, 06:53 PM	#4
oemoilleaks Board Member Join Date: Mar 2017 Location: SoCAL	SOUNDS AMAZING!!! What is that gauge that's just floating there above the manifold?

10-10-2019, 11:11 PM	#8
neildrake Newbie Join Date: Jan 2018 Location: San Diego	Compression ratio is 11:1. It picks up revs so quick mainly due to the lightweight flywheel and clutch. Turns out that a tilton 153T nascar flywheel for small ford will bolt to B30 with a few mods. Rods and pistons are a fair bit lighter than stock also. The extra gauge was just oil pressure temporarily zip tied to intake during break in.

10-11-2019, 12:11 PM	#10
vwbusman66 Stößelstange über alles! Join Date: Oct 2016 Location: Kingsville, MD	Wow. Just wow.

10-11-2019, 12:12 PM	#11
JohnMc PV Abuser Join Date: May 2004 Location: St. Louis	Hopefully you dyno it at some point. It always seems like the B30 doesn't 'scale' as you'd expect from a B20, but then people rarely go all out on a B30 build.

10-11-2019, 04:55 PM	#12
OttoB Board Member Join Date: Aug 2006 Location: E(Seattle!Vancouver! San Francisco!LA!) Helsinski	I got something like 185 hp out from my B30E with K-cam style camshaft, but it is not fully sorted out. Max torque comes in quite high rpm, so I might be cam timing issue or exhaust tuning thingy. I got std B30 E moose horns as exhaust manifolds Before dyno, GT power simulation was made, giving quite close same performance results as dyno.

10-11-2019, 07:28 PM	#13
Tfrasca Board Member Join Date: Apr 2015 Location: Ben Lomond, CA	That is bad ass. What kind of power does it make?

10-11-2019, 07:36 PM	#14
neildrake Newbie Join Date: Jan 2018 Location: San Diego	Dyno TBD I’ll post after it runs on dyno. Right now I’m gettin break-in miles on it before putting the second valve spring in. Also working on an FI setup. Weber’s are great but think I can do better. If someone can tell me how to post pics here I can show some more detail. Also running a quaife sequential gearbox that’s pretty fun. Neil

10-16-2019, 02:28 PM	#15
klr142 Turbo, what? Join Date: May 2004 Location: OR	Beautiful! Looking forward to hearing and seeing more. __________________ Kyle - NLMGG: '91 244 NA DD/Track - General Leif: '71 142 Endurance Racecar - The General's FB page - Oregon Volvo Tuners - Died - 2014 S60 T5 - 2006 Elantra DD Have a K cam or a big N/A specific camshaft for sale? PM me!

Thread Tools
Show Printable Version Email this Page
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode