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73 HTA "Old School" MHI Green
Built 2.0L Wiseco 1400HDs+ Manley I-Beams 9:1
Curt Brown Racing Head + S2's + ARP L19
1200cc DW's + Wahlbro 450
Dual Map 91+E85
Made 405/354 @ 26 PSI - 91
Made 476/444 @ 33 PSI - E85
Shep Trans ultimate ratio 5-speed
First tune on new motor after 100 mile break-in
I had RC1200 (which are 1090cc@43.5 psi) and was hitting 100% IDC making 460 on dynapack. Even at true 1200cc, you should be really close to 100% IDC too.
18psi is a good pump gas friendly actuator , but if you are going to run E85 more often a stiffer spring may help spool up (if the door is cracking now) and it will carry more power. When I went from the 18psi to 25psi actuator on my built engine it picked up in both areas nicely , but boost control was a little harder to dial in.
It looked like it came in a bit late. It will most likely take more boost/power at low rpm but that is harder on the driveline. Either way, it looks like a lot of fun.
I had RC1200 (which are 1090cc@43.5 psi) and was hitting 100% IDC making 460 on dynapack. Even at true 1200cc, you should be really close to 100% IDC too.
I'm sure it probably is right there then, I'll figure out exact #s in a few hours and will update.
18psi is a good pump gas friendly actuator , but if you are going to run E85 more often a stiffer spring may help spool up (if the door is cracking now) and it will carry more power. When I went from the 18psi to 25psi actuator on my built engine it picked up in both areas nicely , but boost control was a little harder to dial in.
It looked like it came in a bit late. It will most likely take more boost/power at low rpm but that is harder on the driveline. Either way, it looks like a lot of fun.
Thanks, I'll have do some more breaking in but excited to have finished the build. I'll certainly do some tweaks and fine tuning down the road like upgrade the WG, regulator, new injectors, etc.
Do you know how much you picked up switching to the 25 Psi WGA?
Thanks, I'll have do some more breaking in but excited to have finished the build. I'll certainly do some tweaks and fine tuning down the road like upgrade the WG, regulator, new injectors, etc.
Do you know how much you picked up switching to the 25 Psi WGA?
your boost will hold better with 25psi WGA. So it will depend on how much crack pressure leak you have. So where you were leaking, you will have more boost on intake side.
You are brave to run 26 psi boost on 91 octane ****.
I asked for a safe tune, so tuner set my boost to 22 psi with little spikes to 23psi.
your boost will hold better with 25psi WGA. So it will depend on how much crack pressure leak you have. So where you were leaking, you will have more boost on intake side.
You are brave to run 26 psi boost on 91 octane ****.
I asked for a safe tune, so tuner set my boost to 22 psi with little spikes to 23psi.
Haha, yeah but fortunately it's only for emergencies. Only have 91 where I'm at. I'll pretty much exclusively run E85.
Dec 20, 2018, 10:00 PM
