[oldevodude]

Originally Posted by Jim in Tucson

I’m posting this in the Alt Fuel forum, as I’m especially looking for input from active E85 users and tuners. My current mods are:

BR cone filter
BR SS MAF pipe
Hallman MBC
APS dual vent BOV/DV
Helix down pipe
Helix test pipe
Greddy EVO2 cat-back (modified to full 3”)
HKS 264/264 cams
Nisei LICP
Walbro 255Lph fuel pump
IX turbo
PPI ported exhaust manifold
SS ‘eBay’ O2 housing
ETS 3” FMIC
1,000cc RC injectors
E85 tune by Scot Gray
394whp/418trq at 28psi on RRE Dyno Pack ???

My primary objective is torque. As you can see on the dyno graph, by about 3,600 rpms I’m already hitting 400 ft lbs. Engine is very responsive. Runs great; no issues. Car is street only. Daily driver. Always puts a smile on my face.

My questions: Are there any current mods that could better serve by being replaced? Are there any mods I’m missing?

What I’m considering:
1. Upgraded wastegate can. Either Forge or FP. I’m leaning toward the FP WGA. Questions: Will an 18 lb can increase torque, or mostly HP? Will spool-up be improved at all?
2. Coil on plug–COP. I’m liking the low-tech Spark Tech setup. COP w/o CDI. Right now my plugs are gapped at 0.018”. I assume with the COP I could run a wider gap. Would that add any measurable torque? I’m guessing, “No”.
3. I’m frustrated with my DV/BOV situation. I have a collection of these. I thought the very expensive APS was the be all end all. Meh!!! I’m considering the also very expensive Works-improved OEM DV, especially since it is on "sale". Appreciate any input.
4. Thinking about converting to ECU boost control. This might broaden the torque plateau, especially considering what Tephra has planned for Ver 6. What do you’ll think?

What I’m not considering:
1. Cams. Yes, I know bigger cams would give me more HP. However, I doubt that another cam can give me substantially more torque. But I’m open to input on this one.
2. Turbo. Pretty much the same comments as cams. Turbos are even more
expensive, and I’m not sure I would get any substantial torque bump. But I’m open…
3. Long-tube header. High rpm HP only, me thinks. Although, I’m watching the development of the short-tube header market. <yawn> The Nasty Habanero.

Thanks in advance for your feedback.

Jim

The COP isn't going to do much especially if you are not having any spark issues currently.

The wastegate will not do much unless current one is not functioning properly. (have you tried adjusting it)

I have read on the forums that some prefer the Forge wastegate over FP
(I am waiting for Red with FP Actuator currently fwiw)

I crushed the stock 9 diverter valve and it holds 30 psi now. LOL bought APS used and it was functioning like a "pop off" valve. At 24 psi the valve would blow completely open and all pressure was lost. A longer bolt to tension the spring would help but I am considering the synapse BOV possibly myself although stock crushed 9 is doing the job with little surge due to spring now so tight at low mid boost it doesn't fully release (how can a spring be perfect enough to hold 30 psi but still release from 19-22 of vacuum?.

Bang for buck and a substantial increase or a good ratio is why I bit the bullet and ordered a FP Red. While I will lose some down low the gains up top and mid band are what sold me.

Cams done right (new springs retainers keepers IMO) cost almost as much as turbo upgrade. I'm skipping cams and might do them later

Good Luck on your decisions and sometimes I wich I could just be happy at whatever power level and leave it at that. lol

Sometimes I think it's more for the sake of the mod than the actual NEED for the mod