Ls3 Small Bore Heads for Ls1 Engines

[Ryan@BallisticSpeedParts]

We are proud to introduce our BSP Small Bore LS3 cylinder heads for LS1/LS6/LS2 engines!

Ballistic Speed Parts LS3 Small Bore cylinder heads are a direct fit to your stock bore LS1 or LS6 engine.  We’ve spent over 2 years developing the ultimate cylinder heads for LS1/LS6/LS2 Engines using GM’s outstanding LS3 cylinder head as our platform. We are proud to offer our heads in 2 Stages that will allow you to bolt on up to 55HP.

Our cylinder heads also feature high quality, race proven, stainless steel intake and exhaust valves from Ferrea Racing Components.

Stage 1 (As Cast):
•   326 cfm of airflow
•   Over 48HP Gain!
•   Intake Port Volume: 255cc

Stage 2 (CNC Ported):
•   350 cfm of airflow
•   Over 55HP Gain!
•   Intake Port Volume: 270cc

Flow Sheets and Info Here!

[cool]

I've been seeing a handful of manufacturers making these small bore ls3/l92 style heads. Very cool stuff.

Toss me a free set and i'll plaster a huge "Ballistic Speed Parts" sticker down the side of my car....

[Ryan@BallisticSpeedParts]

Our 383 Ls1 with our Stage 2 Ls3 Heads

• 11.1:1 Compression
• Factory Ls3 Intake (w/minor cleanup)

• Full Exhaust

SAE: 516hp/458tq

STD: 530hp/470tq



[/list]

[Ryan@BallisticSpeedParts]

I've been seeing a handful of manufacturers making these small bore ls3/l92 style heads. Very cool stuff.

Toss me a free set and i'll plaster a huge "Ballistic Speed Parts" sticker down the side of my car....

Haha...I'd love to man!!

Yeah there is not many options for this setup, the GM version only flows about 280 cfm and the Mast version is $$$, so we're trying to offer a very powerful and more affordable alternative.

[usmcpi]

What cam for the above dyno? Stock ls3 intake?

[Ryan@BallisticSpeedParts]

We used a custom spec 248/259.  All of our back to back testing was done with a stock Ls1 block and we used a shelf grind 232/239.  Yes, stock Ls3 intake manifold with some mild cleanup work, we'll probably do some testing with a Fast 102 in the near future.

[Sabre002]

I have the CNC LS3 heads from GM the numbers are very close. 

What is the combustion chamber size on the head?

[Ryan@BallisticSpeedParts]

I have the CNC LS3 heads from GM the numbers are very close. 

What is the combustion chamber size on the head?

Yeah GM's CNC Ls3 head flows well, the GM version I was referring to is their small bore Ls3 head which is as cast only and flows around 280 CFM.

Chamber size starts at 70cc.

[Sabre002]

good lord thats huge.  I wish they would cast it smaller so we did not have to mill the heads. 

[zbrown]

good lord thats huge.  I wish they would cast it smaller so we did not have to mill the heads.

Dome that shit

[Ryan@BallisticSpeedParts]

good lord thats huge.  I wish they would cast it smaller so we did not have to mill the heads.

Dome that shit

Great answer!!

[wickedrx7]

Interesting... What would the benefit/power gains as compared to stage 2 243's?

[mattster03]

Interesting... What would the benefit/power gains as compared to stage 2 243's?

Curious as to this as well.  Has anyone installed these small bore stage 3 heads on a stock displacement cammed engine?

[RX7what]

Normal LS3 heads work on an LS2. Why did you mention them in your list? Also did I miss the pricing on these?

[zbrown]

Less valve shrouding on the 4" bore with these