stroking Posted August 4, 2009 Report Share Posted August 4, 2009 (edited) I need to know how much to cut off a stock head for a 4mill HOTROD long crank to fit without the spacer plate gasket they send with the kit?? engine will be ran on alcohol so i want it tight........and the head has already been shaved .030 Edited August 4, 2009 by stroking Quote Link to comment Share on other sites More sharing options...
spurdy Posted August 4, 2009 Report Share Posted August 4, 2009 I need to know how much to cut off a stock head for a 4mill HOTROD long crank to fit without the spacer plate gasket they send with the kit?? engine will be ran on alcohol so i want it tight........and the head has already been shaved .030 Not sure if I understand your question correctly. You will have to have some place for the piston to go if your running a 4 mill crank cause it will come out of the jug 2mm. The spacer plate makes your jug taller. Or you can re chamber your stock head which allows clearance for the piston. Or you can run stroker domes. Fly cutting the stock head only increase squish clearances and would be going in the opposite direction. Does this make since? SP Quote Link to comment Share on other sites More sharing options...
uwenr Posted August 4, 2009 Report Share Posted August 4, 2009 I need to know how much to cut off a stock head for a 4mill HOTROD long crank to fit without the spacer plate gasket they send with the kit?? engine will be ran on alcohol so i want it tight........and the head has already been shaved .030 There is a builder here in phoenix that will cut and chamber a stock head for strokers. I doubt he will tell you what to do but im sure he will cut it for you. PM me if youre interested. Quote Link to comment Share on other sites More sharing options...
stroking Posted August 5, 2009 Author Report Share Posted August 5, 2009 There is a builder here in phoenix that will cut and chamber a stock head for strokers. I doubt he will tell you what to do but im sure he will cut it for you. PM me if youre interested. i don't have time to send it off....need it done in 2 days.................if he can't tell me then i'll find someone that can. i got a machine shop close by that can cut it,i just needed to know how much......and i know the chamber has to keep the same shape for proper squish and fuel burning. Quote Link to comment Share on other sites More sharing options...
Wildcardracing Posted August 5, 2009 Report Share Posted August 5, 2009 The deckheight of a four mill longrod with 795's is usually between -.070" and -.080" depending on gaskets used. So add your desired squish to the negative deckheight (I suggest you measure it) and cut it to the desired angle. Quote Link to comment Share on other sites More sharing options...
Wildcardracing Posted August 5, 2009 Report Share Posted August 5, 2009 Don't forget to take into account the head gasket thickness Quote Link to comment Share on other sites More sharing options...
stroking Posted August 5, 2009 Author Report Share Posted August 5, 2009 thanks for the info. Quote Link to comment Share on other sites More sharing options...
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