88BB8B
Proven Member
- 179
- 19
- Oct 14, 2016
-
Coldstream,
BC, Canada
Summary: If you are familliar with my car or have seen my last post about wristpin clearance you probably dont need to read the next paragraph.
Hey guys n gals. I'm slowly gathering what I need and building my 2g 4g63t. I've got eagle H-beams with the newish thicker ARP2000+ rod bolts, I'm going with ACL trimetal rod bearings and ACL Aluglide mains, not quite sure which pistons yet. Perhaps just OEM at first, I've got a nearly new set, but forged later for sure when I get a job after school pretty soon here, I've got 2 spare head gaskets anyway. HX35 with BEP housing or similar. All the fuel 850 FICs, and an AEM infinity to tell everything what to do.
I am aware that I will have to machine spiralock grooves into the OEM pistons to work with Eagle rods, but I have an HX35 and hopefully a twin scroll manifold soon, so I want to take full advatange of the early spool and low end torque of the HX-35 when tuning, without breaking rods, hence the eagles. Plus I have access to a machine shop and little shop experience so I plan to cut the grooves myself to save $$. I also have some beefy evo 8 wristpins to use.
So here's the first thing. I have left the head untouched since my bearings ate eachother and to my fortunate surprise the other week I found a box which contains most of a head kit I had forgotten I had bought a few years back. I was thinking about usning it but it doesnt have springs, I just have valve stem seals and retainers if I recall correctly.
So
A.) If the head I have is in spec after cleanup, and I use it with the stock valvetrain, includinc cams, how high an rpm will it be safe to set my fuel cut with the eagles and OEM pistons?
B.) I was very surprised to find that the seals and retainers are most of the cost of a spring retainer and seal kit, and just springs are pretty cheap, even from manley, so if I upgrade my springs to some manley single (not doullies) is it safe to use this combination of parts and rev high?
B-2.) What would a safe fuel cutoff be with this setup for valvetrain and the eagle rids and oem pistons.
C.) what would a safe redline be for a full forged piston and Rod and upgraded valve springs? If any different than OEM pistons.
D.) Am I just wasting my time trying to rev that high with stock cams? Would any power be gained on a stock cams engine if I pushed it to 8000-8250Rpm.
Hey guys n gals. I'm slowly gathering what I need and building my 2g 4g63t. I've got eagle H-beams with the newish thicker ARP2000+ rod bolts, I'm going with ACL trimetal rod bearings and ACL Aluglide mains, not quite sure which pistons yet. Perhaps just OEM at first, I've got a nearly new set, but forged later for sure when I get a job after school pretty soon here, I've got 2 spare head gaskets anyway. HX35 with BEP housing or similar. All the fuel 850 FICs, and an AEM infinity to tell everything what to do.
I am aware that I will have to machine spiralock grooves into the OEM pistons to work with Eagle rods, but I have an HX35 and hopefully a twin scroll manifold soon, so I want to take full advatange of the early spool and low end torque of the HX-35 when tuning, without breaking rods, hence the eagles. Plus I have access to a machine shop and little shop experience so I plan to cut the grooves myself to save $$. I also have some beefy evo 8 wristpins to use.
So here's the first thing. I have left the head untouched since my bearings ate eachother and to my fortunate surprise the other week I found a box which contains most of a head kit I had forgotten I had bought a few years back. I was thinking about usning it but it doesnt have springs, I just have valve stem seals and retainers if I recall correctly.
So
A.) If the head I have is in spec after cleanup, and I use it with the stock valvetrain, includinc cams, how high an rpm will it be safe to set my fuel cut with the eagles and OEM pistons?
B.) I was very surprised to find that the seals and retainers are most of the cost of a spring retainer and seal kit, and just springs are pretty cheap, even from manley, so if I upgrade my springs to some manley single (not doullies) is it safe to use this combination of parts and rev high?
B-2.) What would a safe fuel cutoff be with this setup for valvetrain and the eagle rids and oem pistons.
C.) what would a safe redline be for a full forged piston and Rod and upgraded valve springs? If any different than OEM pistons.
D.) Am I just wasting my time trying to rev that high with stock cams? Would any power be gained on a stock cams engine if I pushed it to 8000-8250Rpm.
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