My Road Trip Motor Progress
Joel Mohr:
We should try and keep this thread alive. There is so much new technology that can be applied to a VW, and most people seem to be stuck in the same 40 year old line of thinking. With small stems, and beehive valve springs, you can easily add 1,000 rpm to the same old combo. And with the motor not working as hard to sustain RPM, it just "Unleashes" more power....
Taylor:
Maybe I am confused as to the point of opening up a chamber and then fly cutting it down to get compression back?? Did I miss something or isn't that what you claimed you did? 11to1 with a hemi chamber confuses me.
Zach Gomulka:
I'll give my two cents...
If hemi style chambers are so good, why do you need so much more ignition lead with them?
If hemi style chambers are so good, why is the new Chrysler hemi not a true hemi?
If hemi style chambers are so good, why does the new Chrysler hemi use twin plugs?
Hemi style chambers greatly increase the surface area of the chamber, allowing more heat to soak into the head rather than out the exhaust.
bedjo78:
I have reshape chamber like that. and I installed on 2276 bay windoy. daily driver. with compression 7.1 ; 1 camshaft engle 110. engine didn't like. pinging a lot and i have to retard igniton quate a lot. it is on tropical country. pump gas is 86-88. removed it and install normal chamber heads
rick m:
The HEMI chamber works well with more compression. If they did not work why did the porsche engineers prefer them when building the 356, 912 and 911 motors??? It was not just about putting the larger valves in either. With more compression, you do not need as much timing.
For all of you who continue to think they don't work...don't run them. However, they do work better than the traditional chamber for street driving. You also cannot just flycut the HEMI shape. You have to go in and radius all the machined surfaces and do a little more work on them.
This is such an mis-understood subject...It requires more than just the hemi chamber to make it all work. If it did not work, I would not have torn my motor down and gone back to it after trying the traditional chambers again....even when I knew what the outcome would probably be.
ZACH...Twin plugs have been done on VWs going back over 30 years. It was probably initially done by REVMASTER for the VW airplane engines. I have a few other friends who did it on VW performance motors too. It is not necessary with the right combustion chamber and ignition.
I like trying different combos...but personally, the hemi chamber has worked well for me for years and is the reason I am returning to it.
RM
Navigation
[0] Message Index
[#] Next page
[*] Previous page