2.7L V6 Valvetrain - Revision history

Chase206 at 00:17, 7 January 2026

2026-01-07T00:17:20Z

← Older revision		Revision as of 00:17, 7 January 2026
Line 48:		Line 48:
	\|-		\|-
	\|OEM 3.5L Sigma		\|OEM 3.5L Sigma
	\|		\|19.20mm
			26.50mm
	\|26.4mm		\|26.4mm
	\|50 lbs		\|50 lbs

Chase206: Added 3.5L Sigma specs

2026-01-06T23:08:20Z

Added 3.5L Sigma specs

← Older revision		Revision as of 23:08, 6 January 2026
Line 49:		Line 49:
	\|OEM 3.5L Sigma		\|OEM 3.5L Sigma
	\|		\|
	\|?		\|26.4mm
	\|?		\|50 lbs
	\|?		\|100 lbs
	\|?		\|****
	\|~~To be determined~~		\|'''Coil bind near 8mm lift.'''
	\|-		\|-
	\|Melling		\|Melling

Chase206 at 03:40, 8 December 2025

2025-12-08T03:40:33Z

← Older revision		Revision as of 03:40, 8 December 2025
Line 34:		Line 34:
	\|140 lbs		\|140 lbs
	\|150 lbs		\|150 lbs
	\|Best fit for 50-70% more pressure		\|Best fit for 45-55% more pressure
	\|-		\|-
	\|BrianCrower		\|BrianCrower

Chase206 at 03:33, 8 December 2025

2025-12-08T03:33:32Z

← Older revision		Revision as of 03:33, 8 December 2025
Line 34:		Line 34:
	\|140 lbs		\|140 lbs
	\|150 lbs		\|150 lbs
	\|		\|Best fit for 50-70% more pressure
	\|-		\|-
	\|BrianCrower		\|BrianCrower

Chase206: Added Ferrea 3.8L Lambda springs

2025-12-08T00:11:00Z

Added Ferrea 3.8L Lambda springs

← Older revision		Revision as of 00:11, 8 December 2025
Line 26:		Line 26:
	\|		\|
	\|-		\|-
	\|BC1260<ref>https://store.briancrower.com/products/valve-springs-single-nissan-qr25?variant=13489382457409</ref>		\|BrianCrower
			BC1260<ref>https://store.briancrower.com/products/valve-springs-single-nissan-qr25?variant=13489382457409</ref>
	\|17.90mm		\|17.90mm
	24.89mm		24.89mm
Line 35:		Line 36:
	\|		\|
	\|-		\|-
	\|BC1220<ref>https://store.briancrower.com/products/valve-springs-single-nissan-vq35de?variant=13489358929985</ref>		\|BrianCrower
			BC1220<ref>https://store.briancrower.com/products/valve-springs-single-nissan-vq35de?variant=13489358929985</ref>
	\|17.96mm		\|17.96mm
	25.15mm		25.15mm
Line 53:		Line 55:
	\|To be determined		\|To be determined
	\|-		\|-
	\|VS-2283<ref>https://www.summitracing.com/parts/mel-vs-2283</ref>		\|Melling
			VS-2283<ref>https://www.summitracing.com/parts/mel-vs-2283</ref>
	\|19.10mm		\|19.10mm
	26.80mm		26.80mm
Line 63:		Line 66:
	OEM Retainer I.D. may be too small.		OEM Retainer I.D. may be too small.
	\|-		\|-
	\|VS-2285<ref>https://www.summitracing.com/parts/mel-vs-2285</ref>		\|Melling
			VS-2285<ref>https://www.summitracing.com/parts/mel-vs-2285</ref>
	\|17.60mm		\|17.60mm
	26.70mm		26.70mm
Line 72:		Line 76:
	\|Spring base in cyl head needs machining.		\|Spring base in cyl head needs machining.
	'''Coil bind near 8mm lift.'''		'''Coil bind near 8mm lift.'''
			\|-
			\|Ferrea
			S10134<ref>https://www.vividracing.com/ferrea-single-valve-spring-single-hyundai-lambda-2010-p-153686147.html</ref>
			Lambda 3.8L
			\|18.30mm
			25.19mm
			\|21.60mm
			\|95 lbs **
			\|140 lbs **
			\|150 lbs **
			\|Spring base in cyl head needs machining.
			OEM Retainer I.D. may be too small.
	\|}		\|}
	<nowiki>**</nowiki> Denotes assumed pressure from online specifications. Valve spring yet to be measured in person.		<nowiki>**</nowiki> Denotes assumed pressure from online specifications. Valve spring yet to be measured in person.

Chase206: Retainer and Keeper info

2025-12-07T23:11:27Z

Retainer and Keeper info

← Older revision		Revision as of 23:11, 7 December 2025
Line 1:		Line 1:
	The purpose of this article is to explore other valvetrain options using stock components from other makes and/or models. Now that Ferrea no longer sells a complete kit we need to look to other options. For camshafts please see [[Camshaft Specifications]].		The purpose of this article is to explore other valvetrain options using stock components from other makes and/or models. Now that Ferrea no longer sells a complete kit we need to look to other options. For camshafts please see [[Camshaft Specifications]].

			== Valve Springs ==
	The following table assumes you use the OEM valve retainer and keepers and maintain the OEM 34.5mm installed spring height. Stock lift is 8mm and lift of the commonly used Crower .349-.351" regrind is 8.9mm.		The following table assumes you use the OEM valve retainer and keepers and maintain the OEM 34.5mm installed spring height. Stock lift is 8mm and lift of the commonly used Crower .349-.351" regrind is 8.9mm.
	{\| class="wikitable"		{\| class="wikitable"
Line 27:		Line 28:
	\|BC1260<ref>https://store.briancrower.com/products/valve-springs-single-nissan-qr25?variant=13489382457409</ref>		\|BC1260<ref>https://store.briancrower.com/products/valve-springs-single-nissan-qr25?variant=13489382457409</ref>
	\|17.90mm		\|17.90mm
	24.~~10mm~~		24.89mm
	\|21.85mm		\|21.85mm
	\|70 lbs		\|70 lbs
Line 73:		Line 74:
	\|}		\|}
	<nowiki>**</nowiki> Denotes assumed pressure from online specifications. Valve spring yet to be measured in person.		<nowiki>**</nowiki> Denotes assumed pressure from online specifications. Valve spring yet to be measured in person.

			== Valve Spring Retainers & Keepers/Locks ==
			Our OEM retainers and keepers are meant for a ~17.50mm I.D. valve spring. The keeper angle is 9 degrees for a 6mm valve stem. There are several retainers that look like they might fit our motor but you may run into mismatched keeper angles, valve stem diameters or incorrect keeper grooves on the valve stems. For example a BC2220<ref>https://store.briancrower.com/products/bc2220-1?variant=13489835540545</ref> Titanium retainer may appear like a perfect match but it has a 7 degree keeper angle.

Chase206: Additional data and citing sources

2025-12-07T22:25:21Z

Additional data and citing sources

← Older revision		Revision as of 22:25, 7 December 2025
Line 8:		Line 8:
	O.D.		O.D.
	!Coil Bind Height		!Coil Bind Height
	!Press. @34.5mm Installed Height		!Press. @34.5mm
	!Press. @8mm Lift		(Installed Height)
	!Press. @8.9mm Lift		!Press. @26.5mm
			(Open 8mm Lift)
			!Press. @25.6mm
			(Open 8.9mm Lift)
	!Notes		!Notes
	\|-		\|-
	\|OEM 2.7L Delta		\|OEM 2.7L Delta
	\|17.~~5mm~~		\|17.50mm
	24.~~7mm~~		24.70mm
	\|23.~~8mm~~		\|23.80mm
	\|45 lbs		\|45 lbs
	\|100-105 lbs		\|100-105 lbs
	\|110-115 lbs		\|110-115 lbs
	\|		\|
	\|-
	~~\|OEM 3.5L Sigma~~
	\|
	\|?
	\|?
	\|?
	\|?
	~~\|To be determined~~
	\|-		\|-
	\|BC1260<ref>https://store.briancrower.com/products/valve-springs-single-nissan-qr25?variant=13489382457409</ref>		\|BC1260<ref>https://store.briancrower.com/products/valve-springs-single-nissan-qr25?variant=13489382457409</ref>
	\|17.~~9mm~~		\|17.90mm
	24.~~1mm~~		24.10mm
	\|21.85mm		\|21.85mm
	\|70 lbs		\|70 lbs
Line 48:		Line 43:
	\|Spring base in cyl head needs machining.		\|Spring base in cyl head needs machining.
	OEM Retainer I.D. may be too small.		OEM Retainer I.D. may be too small.
			\|-
			\|OEM 3.5L Sigma
			\|
			\|?
			\|?
			\|?
			\|?
			\|To be determined
			\|-
			\|VS-2283<ref>https://www.summitracing.com/parts/mel-vs-2283</ref>
			\|19.10mm
			26.80mm
			\|25.83mm
			\|60 lbs **
			\|100 lbs **
			\|110lbs **
			\|Spring base in cyl head needs machining.
			OEM Retainer I.D. may be too small.
			\|-
			\|VS-2285<ref>https://www.summitracing.com/parts/mel-vs-2285</ref>
			\|17.60mm
			26.70mm
			\|26.42mm
			\|80 lbs **
			\|120 lbs **
			\|130 lbs **
			\|Spring base in cyl head needs machining.
			'''Coil bind near 8mm lift.'''
	\|}		\|}
			<nowiki>**</nowiki> Denotes assumed pressure from online specifications. Valve spring yet to be measured in person.

Chase206: Citing sources

2025-12-07T22:11:36Z

Citing sources

← Older revision		Revision as of 22:11, 7 December 2025
Line 30:		Line 30:
	\|To be determined		\|To be determined
	\|-		\|-
	\|BC1260		\|BC1260<ref>https://store.briancrower.com/products/valve-springs-single-nissan-qr25?variant=13489382457409</ref>
	\|17.9mm		\|17.9mm
	24.1mm		24.1mm
Line 39:		Line 39:
	\|		\|
	\|-		\|-
	\|BC1220		\|BC1220<ref>https://store.briancrower.com/products/valve-springs-single-nissan-vq35de?variant=13489358929985</ref>
	\|17.96mm		\|17.96mm
	25.15mm		25.15mm

Chase206: Adding diameters to valve springs

2025-12-07T22:09:56Z

Adding diameters to valve springs

← Older revision		Revision as of 22:09, 7 December 2025
Line 5:		Line 5:
	\|+2.7L V6 Valve Spring Comparison		\|+2.7L V6 Valve Spring Comparison
	!Description		!Description
			!I.D.
			O.D.
	!Coil Bind Height		!Coil Bind Height
	!Press. @34.5mm Installed Height		!Press. @34.5mm Installed Height
Line 12:		Line 14:
	\|-		\|-
	\|OEM 2.7L Delta		\|OEM 2.7L Delta
			\|17.5mm
			24.7mm
	\|23.8mm		\|23.8mm
	\|45 lbs		\|45 lbs
Line 19:		Line 23:
	\|-		\|-
	\|OEM 3.5L Sigma		\|OEM 3.5L Sigma
			\|
	\|?		\|?
	\|?		\|?
Line 26:		Line 31:
	\|-		\|-
	\|BC1260		\|BC1260
			\|17.9mm
			24.1mm
	\|21.85mm		\|21.85mm
	\|70 lbs		\|70 lbs
Line 33:		Line 40:
	\|-		\|-
	\|BC1220		\|BC1220
			\|17.96mm
			25.15mm
	\|22.86mm		\|22.86mm
	\|90 lbs		\|90 lbs
	\|175 lbs		\|175 lbs
	\|185 lbs		\|185 lbs
	\|Spring base in cyl head needs machining		\|Spring base in cyl head needs machining.
			OEM Retainer I.D. may be too small.
	\|}		\|}

Chase206: Created page with "The purpose of this article is to explore other valvetrain options using stock components from other makes and/or models. Now that Ferrea no longer sells a complete kit we need to look to other options. For camshafts please see Camshaft Specifications. The following table assumes you use the OEM valve retainer and keepers and maintain the OEM 34.5mm installed spring height. Stock lift is 8mm and lift of the commonly used Crower .349-.351" regrind is 8.9mm. {| class=..."

2025-12-07T21:57:05Z

Created page with "The purpose of this article is to explore other valvetrain options using stock components from other makes and/or models. Now that Ferrea no longer sells a complete kit we need to look to other options. For camshafts please see Camshaft Specifications. The following table assumes you use the OEM valve retainer and keepers and maintain the OEM 34.5mm installed spring height. Stock lift is 8mm and lift of the commonly used Crower .349-.351" regrind is 8.9mm. {| class=..."

New page

The purpose of this article is to explore other valvetrain options using stock components from other makes and/or models. Now that Ferrea no longer sells a complete kit we need to look to other options. For camshafts please see [[Camshaft Specifications]].

The following table assumes you use the OEM valve retainer and keepers and maintain the OEM 34.5mm installed spring height. Stock lift is 8mm and lift of the commonly used Crower .349-.351" regrind is 8.9mm.
{| class="wikitable"
|+2.7L V6 Valve Spring Comparison
!Description
!Coil Bind Height
!Press. @34.5mm Installed Height
!Press. @8mm Lift
!Press. @8.9mm Lift
!Notes
|-
|OEM 2.7L Delta
|23.8mm
|45 lbs
|100-105 lbs
|110-115 lbs
|
|-
|OEM 3.5L Sigma
|?
|?
|?
|?
|To be determined
|-
|BC1260
|21.85mm
|70 lbs
|140 lbs
|150 lbs
|
|-
|BC1220
|22.86mm
|90 lbs
|175 lbs
|185 lbs
|Spring base in cyl head needs machining
|}