Cam/HG/Greddy IM/Springs/Retainers Upgrade....Before and After Build Thread

[jspaeth]

I am posting this so that other people can see on the same car, same everything, how upgrading cams, intake manifold, flywheel, and retainers/springs change the performance. With the new cams and springs/retainers, I am hoping I can safely rev to around 8000 RPM.

Current Setup

Stock head S13 Blacktop SR20det, GT2871R 0.64/AR, stock intake mani, PowerFC D-Jetro, RS BOV, RSPL Greddy IC, ACT Street Disc and Heavy Duty PP, 740cc Tomei Injectors, Aeromotive PFR @ 3bar, 3" downpipe and exhaust, stock S13 SR throttle body.

New Setup

Adding the following:

- APexi 1.1 mm HG
- HKS Step 2 cams (264/264 and 12/11.5 lift IN/EX)
- "New model" S13 SR Greddy Intake Manifold
- ARP Head studs (VW studs, not "SR" studs)
- Greddy rocker arm stoppers
- Brian Crower BC0200 Spring/Retainer set
- ACT Prolite (10.5 lb) flywheel
- ACT 6-puck race disc
- Putting in new valve spring seals also, which should add at least 20 whp.


Will be getting the head milled (0.003") and hot tanked after taking it off.

I will be taking the car to Evans EFI Tuning in eastern PA, which is where the first tune was done (allows good comparison of dyno charts)....this is done on a Dynapack dyno.....yes I am aware they read a little bit high sometimes, who cares.



"Current Setup" Dyno Chart





I am particularly pleased with how early and smoothly my torque comes in, compared to other with the same or similar setups.



Will be posting picture updates as I work, and when finished, I will post a new dyno so everyone can see exactly how the cams, IM, springs, retainers, and flywheel affected the torque and powerband.