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Discussion Starter #1
Why don't we see more of these?

I have had the most ludicrous success on the D with these builds.. Flat top piston as well.

~+0.007 w/0.027 HG has worked magic for me.. Max bore 75.5mm

With a Y8 head it is wonderful.. Or mill the SHITT out of a Z6 head and check P2V clearance.


10.5:1 D17 with 4 PSI of boost making 220 WHP.. (Machinist nearly shit when I asked him to take off ~0.110+)
12.7:1 D16 NA on pump gas, making 164WHP...

Both 0.001 P2W.. AHAHAH
 

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Discussion Starter #2
#quench
#squish
#counterbore
#prariedog
#valvereliefs
#clay
#blueprint
#flattop
#rodstretch
#pistonspeed
#massxacceleration
#elasticmodulus
 

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EG5T
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~+0.007 w/0.027 HG has worked magic for me.. Max bore 75.5mm
That's a very brave p2h clearance. What's your rev limit set to and what are the internals?

I personally love the concept. I did a boosted d16/td05-16g TME, utilizing quench - it required very little timing and still manages to spin street 15's on 5th gear(medium geared box).

I have noticed, that the general preference, of most engine builders, is open chamber - e.g. 4pistons, badguys.
ENDYN, on the other hand, has been building 10 000rpm, 300hp n/a b20's, using quench, for more than 10-12 years.
Having seen the difference, I would always choose quench vs open chamber.


10.5:1 D17 with 4 PSI of boost making 220 WHP.. (Machinist nearly shit when I asked him to take off ~0.110+)
Curious to see the pads of a z6 head, milled this much, happen to have a photo?
 

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Im more a fan of a severe dish piston with as flat a head as possible. But I never seem to get things started when I have good finances.
 
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