Toyota MR2 Message Board - View Single Post - 4A-GE MK1 Engine How can i mod 200hp on my 87 NA 4age motor?

Raptor13x · 08-16-2008, 07:00 AM

^ A 5-valve design has significantly more total valve area than a 4-valve design. It's simple geometry.

08-16-2008, 07:00 AM	#84 (permalink)
Raptor13x Legendary Join Date: Apr 2006 Location: Farmington Hills, MI Posts: 3,997 Thanks: 7 Thanked 44 Times in 37 Posts My Google Map iTrader Rating: (5/100% )	^ A 5-valve design has significantly more total valve area than a 4-valve design. It's simple geometry.