red head question

srxeater

srxeater

New member
Joined
Jan 29, 2008
Messages
119
Age
40
Location
Neillsville, Wisconsin
i just ordered 700 jugs and pistons for my red head 600 and was wondering what it takes to use the 600 head on the 700 top end. i read some place on here that it could be done with some modifications, but it didnt go into detail as to what needs to be done.i have acess to a full machine shop, and dont have the extra cash for the 700 head.please help a feller out! :yrules:
 
snowdad4 said:
how bout a like new head for say $100, plus shipping.cheap insurance as to your changeover working properly. and i do mean like new!
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i would but i am tapped out! 8 inches :letitsnow possible tonight and this is the only thing holding me back! anyone else?
 
I would just open it up for the bore diameter on a lathe and then you might want to cc the head to see how much tighter it is then the 700 head, you may want to take some out of the dome if its alot tighter volume or your compression ratio will be alot higher.
 
Wow, thats a big lathe you have to swing a triple head on. I do it on a mill and I had a cutter made to do the chambers.

You said you had access to a machine shop, if you can get it done for free that's fine, if not it's gonna cost you way more than that $100 head and next day air to get it done right, you need to cut the squish area to the bore size then machine the chambers, lots o work and time.
 
mrviper700 said:
I would just open it up for the bore diameter on a lathe and then you might want to cc the head to see how much tighter it is then the 700 head, you may want to take some out of the dome if its alot tighter volume or your compression ratio will be alot higher.
Click to expand...
thank you! I'll just taper it out to 70.5 mm. any idea what the 700 head cc is? if not its no big deal to bolt it on and check the squish and do a quick comp. check. got bored and decided to check the ring end gap and discovered that wiseco sent me the wrong rings! 70.5 mm pistons and 68 mm rings in all 3 sets... did sombody say quality control? :o|
 
800 said:
Wow, thats a big lathe you have to swing a triple head on. I do it on a mill and I had a cutter made to do the chambers.

You said you had access to a machine shop, if you can get it done for free that's fine, if not it's gonna cost you way more than that $100 head and next day air to get it done right, you need to cut the squish area to the bore size then machine the chambers, lots o work and time.
Click to expand...
you are probobly right, if the chambers need that much re-working, it doesnt pay to destroy a sellable head. just thought i would try somthing different. i enjoy doing things myself (when it works out!) but you talked me out of it. thanks for all the info on this topic. :homework:
 
just a follow up, i ended up machining my 600 head, since my new head is backordered until the 10th of march. things are starting to melt here and i gotta run this thing this year! i used a flycutter on the flywheel grinding machine, and i took the bulk of the material out of the outer edge.i didnt take enough out at first, i bolted it on and still had 155 psi. so i took a little more out with my die grinder, then sanded everything smooth.i now have 145 psi with all 3 layers still in the gasket. this is the same comp. i had with the 600 with 1 layer. . thanks for all the input. :rocks:
 
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