liquifire /invader heads

[lwb140]

i am under the assumption that the 2a heads are smaller chamber than the deere 2c head is this correct ? can the 2c head be milled or is it more the shape of the chamber different ? does anyone have a set of 2a s for sale?

[guitardude081]

The 2a chamber is completely different. I don't think it'd be possible to recreate the 2a using the 2c casting. I've got a set of NOS 2a's for $100 or a pair of used ones for $50.
~Jack

[lwb140]

super ,ive got a pair of 4/6 jugs at us chrome for nicosil [sp]? should be done any time, according to previous discussion these with a set 2a heads should wake up a 440 liquifire any new comments on the subject

[A1 SLEDER JIM]

The issue of the 4/6 cylinder is that unless you have the proper pistons you end up using invader/liquifire pistons and never benefit from the extra ports in the 4/6 cylinders. the pistons for the 4/6 have a different design for that engine. it is very hard to find the proper pistons for them.one year only production; most people just use the invader/liqufire pistons because they fit and work and are available. so nothing gained with the 4/6 cylinders in most cases. its better to just get some NOS cylinders and use them.
jim

[That Girl Racing]

What is the difference in the pistons?

[guitardude081]

Peter,
I'm assuming it has to do with the skirt. The LF/Invader Pistons probably shroud the transfer ports being that the transfer area is going to be wider on the 6-port motor. I'd assume that the 4-port piston would block part of the transfer opening in the case. If a guy was to cut the skirt to match, you'd think it would work. If my theory is right, you'd want to modify the Deere piston because of the offset pin. This is just my theory. You'd think that since these are the same basic engines that the ring location and overall height of the piston would be the same.
~Jack

[ICCSF 108]

[quote="guitardude081"}, If my theory is right, you'd want to modify the Deere piston because of the offset pin.

I guess I don't understand the off set pin part?? Are you talking about one of the ring pins ?


Kenny[/quote]

[Trucker]

[lwb140]

thanks for the pic, kenny guitardude says it has to do with the thrust on the cylinder wall ???? wade

[guitardude081]

Kenny,
One of the things that Deere did different with their version of the Invader motor was to change the piston pin location. Usually when a piston pin is offset or moved is to counteract wear due the the piston "tipping" which is due to thrust. The Deere motor was deemed more reliable due to their heads and the piston pin thing. Someone....most likely a former member of the site who loved quoting tech manuals did a post on the differences way back when.
~Jack

[JDT]

[jdsnowfire]

so whould deere pistons in an invader engine help?

whould invader heads on a deere engine boost performance?

just wondering

or whould both of these have negative effects on reliability and performance

[guitardude081]

The Invader heads will boost performance. This is mainly in throttle response. You have to bump the timing. The member who posted the differences between the 2 motors had a list of everything that was changed including the specs of the changes. He also listed what to change when swapping heads. I don't remember the exact specs, all I know is that from a conversation with him was that the reason Deere made the Fireburst motor was to make it live for more than 500 miles. I'd like to have that list because the motor differences seem to come up a lot of in conversation. There are a lot of guys here that can tell you what to swap and what to change to gain performance. I ran Invader heads in my '80 Liquifire for the last full season that I had it. I noticed that it was a lot better out of the hole and that it had much better throttle response. It was a worthwhile upgrade.
~Jack

[lwb140]

heads showed up today !! cant wait to get them on !! they llok great thanks wade

[guitardude081]

Wade,
Glad you like them. I cleaned them up pretty good. I love the combustion chamber on the 2a heads. I had them schwacked .002" before I put them on my '80 LF so they should be nice and flat. Before you rebuild the engine, check out the FAQ section on rebuilding the LF engine. There are a few things to do to ensure that the gasket won't leak around the head nuts.
~Jack