20V MK1 Engine Swap 1.8L 20V?

NatL88 · 10-10-2007, 09:10 PM

I know it's a long shot, but how well would a 7afe do with a 5valve head.
As far as my research has taught me, they will bolt up with no questions asked, but the 7A isn't made to rev as high as te 4A without lightening/strengthening internals.
Definitely the rods, I assume crankshaft, and the 20V pistons.
Is all this even worth it compared to stroking a 4AG to maybe 80mm or even 82mm?

Basically I'm designing a slightly torquier 4AG crossed with a freeer-breathing 7A.

kakapoopie · 10-10-2007, 11:32 PM

somones done this already (turboed too) and got to 400+ hp, theyd prolly be the person to ask. look on midwest4ag.com

NatL88 · 10-11-2007, 02:01 PM

What if I only put the 7A crankcase on a 4AG block and head?

mr220v · 10-11-2007, 02:58 PM

Quote:

Originally Posted by NatL88

What if I only put the 7A crankcase on a 4AG block and head?

It won't fit.

10-10-2007, 09:10 PM	#1 (permalink)
NatL88 ubernoob Join Date: Jun 2006 Location: Toronto, Ontario, Canada Posts: 25 Thanks: 1 Thanked 0 Times in 0 Posts iTrader Rating: (0/0% )	1.8L 20V? I know it's a long shot, but how well would a 7afe do with a 5valve head. As far as my research has taught me, they will bolt up with no questions asked, but the 7A isn't made to rev as high as te 4A without lightening/strengthening internals. Definitely the rods, I assume crankshaft, and the 20V pistons. Is all this even worth it compared to stroking a 4AG to maybe 80mm or even 82mm? Basically I'm designing a slightly torquier 4AG crossed with a freeer-breathing 7A.

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

10-10-2007, 11:32 PM	#2 (permalink)
kakapoopie No Skills Join Date: Jan 2006 Posts: 6 Thanks: 0 Thanked 0 Times in 0 Posts iTrader Rating: (0/0% )	somones done this already (turboed too) and got to 400+ hp, theyd prolly be the person to ask. look on midwest4ag.com

10-11-2007, 02:01 PM	#3 (permalink)
NatL88 ubernoob Join Date: Jun 2006 Location: Toronto, Ontario, Canada Posts: 25 Thanks: 1 Thanked 0 Times in 0 Posts iTrader Rating: (0/0% )	What if I only put the 7A crankcase on a 4AG block and head?