Right so I’ve sourced myself a good stock bore Mexican 302 block and it’s getting time to decide on my final spec.
It’s going to be 99% street driven, 347ci, 6500rpm limit near on 500hp build. Idea is for a snappy revving responsive engine.
What I can’t decide on however is heads and CR combo.
What I was thinking:
-fully prepped 302 block
-ARP mains studs
-K1/RPM/Liberty 4340 internal balance crank
-Scat 4340 H beams
-Mahle powerpak -6.5cc flat top pistons (1.0/1.0/2.0 rings)
-Clevite 77 H bearings
-Morel link bar lifters
-double timing chain
-Custom cam from Ed Curtis at FTI
-Davies Craig electric water pump + controller
-melling standard flow oil pump
-arp bolts throughout
-kevko sump
-harmonic balancer
-Jim Inglese 48mm 8 Stack ITB’s running on Emu Black ecu.
What I cannot decide on, either:
185cc AFR renegade heads with 58cc chambers and #8019 spring upgrade. With 0.041 head gasket and 0.213 crown to top ring the static CR to just under 10.6:1
or
Trick flow 11R 190cc heads, 56cc chamber.
With the same 0.041 HG and -6.2cc pistons this brings the static CR to 10.9:1
Obviously with cam specs I can bleed off dynamic CR to counter detonation, the Ecu has dual knock sensors with timing control. The car will be run on 98/99 octane and will also have flex fuel for up to e85 for European road trips. The plan is to have provision for 95 fuel if I get stuck.
Im open to peoples inputs to what you’d go with if it was your choice and why?
FYI the trick flows work out about $150 cheaper.
It’s going to be 99% street driven, 347ci, 6500rpm limit near on 500hp build. Idea is for a snappy revving responsive engine.
What I can’t decide on however is heads and CR combo.
What I was thinking:
-fully prepped 302 block
-ARP mains studs
-K1/RPM/Liberty 4340 internal balance crank
-Scat 4340 H beams
-Mahle powerpak -6.5cc flat top pistons (1.0/1.0/2.0 rings)
-Clevite 77 H bearings
-Morel link bar lifters
-double timing chain
-Custom cam from Ed Curtis at FTI
-Davies Craig electric water pump + controller
-melling standard flow oil pump
-arp bolts throughout
-kevko sump
-harmonic balancer
-Jim Inglese 48mm 8 Stack ITB’s running on Emu Black ecu.
What I cannot decide on, either:
185cc AFR renegade heads with 58cc chambers and #8019 spring upgrade. With 0.041 head gasket and 0.213 crown to top ring the static CR to just under 10.6:1
or
Trick flow 11R 190cc heads, 56cc chamber.
With the same 0.041 HG and -6.2cc pistons this brings the static CR to 10.9:1
Obviously with cam specs I can bleed off dynamic CR to counter detonation, the Ecu has dual knock sensors with timing control. The car will be run on 98/99 octane and will also have flex fuel for up to e85 for European road trips. The plan is to have provision for 95 fuel if I get stuck.
Im open to peoples inputs to what you’d go with if it was your choice and why?
FYI the trick flows work out about $150 cheaper.
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