EricF - Viewing Profile

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Group:: OH Moderator
Active Posts:: 5,124(1.91 per day)
Most Active In:: Performance Modifications (1980 posts)
Joined:: 17-July 02
Profile Views:: 11,770
Last Active:: Yesterday, 09:29 PM
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Previous Fields

Location:: All over Florida
Crew:: LBC

EricF driving around an 850 leaving a line of coolant drops and oil drops along with occasional tire marks and confused pedestrians and/or ricers...

Posts I've Made

In Topic: Dyno'D The 855

Posted 20 Nov 2009

Ryan Hackett, on 20 November 2009 - 01:13 PM, said:
the ecu is tuned for this set up. had to send the WG back to forge to get fixed then i should be back to 17psi. a/fr was 11.5 across as well so i do have some room.

At 17 psi you should see around 250-270 whp, which is a lot more respectable
In Topic: Dyno'D The 855

Posted 20 Nov 2009

Turn the boost up.
In Topic: Revised Tune & Newer Oil Pan W/Oil Cooler

Posted 20 Nov 2009

ozzimark, on 20 November 2009 - 11:47 AM, said:
I've seen the stock timing map for out engines, 0 and 5% load rows have timing values in the single values or low teens, so that makes sense that the timing retards to almost TDC, I don't see the lean spike you're referring to though, only that it's going down to ~10:1 as soon as you shift, and then comes back up a little less than a second later. I guess that basically is a split second

Your thoughts on timing are off quite a bit

If you follow a stock map's 25% line, it will start at 15 degrees for the 500 RPM bin, and climb to 37 degrees by the last bin. The 100% line starts at 12 and climbs to 26... The last bin is 6200 RPM btw.

Especially in the higher RPM range as you get further away from the torque peak, you need quite a bit of timing even on small fast burning chambers like these with centered spark plugs.

Here is my current timing map, I think it is a little too conservative in a few places. (I'm running 17-19 psi boost, so at WOT by 4000 I'm in the 200-230 KPA range.

I have a suspicion Hussein's datalogger is lying to him about timing. Or else it's all being pulled for some reason.
In Topic: Blew My Head Gasket On Built Engine

Posted 20 Nov 2009

HeavyIron, on 20 November 2009 - 12:45 AM, said:
I got lucky- I will post up pics as soon as I can find the cable for my camera. Pistons, cylinder walls, and valves all look superb. their is a 1/4" piece of hg missing around cyl #2 where it blew out. the head bolts were measured and the bolts had stretched a couple .001's around cyl 1 &2. Basically, the head lifted off. I have seen it happen in boosted hondas and eclipses. Thankfully the head gasket gave out first and pressurized the cooling system blowing out my radiator. If the gasket had held, My valves and pistons would be destroyed. I count my blessings.

Did you check flatness of the head and block? I am still sure it had nothing to do with the bolts...
In Topic: Blew My Head Gasket On Built Engine

Posted 19 Nov 2009

Jardon, on 19 November 2009 - 12:33 PM, said:
Just to add - a 19t is only above 65% efficient with my boost plot from around 2500 to 6000 rpm. Above 6000 rpm even with only a bar of boost it is off the compressor map (inefficient). The same goes for all TD04 turbos - but less efficient for say a 15g which can only flow less for a given amount of boost. The high rev/high boost will not be nice to drive and will bugger something eventually. Go with lower boost, as many flow mods as you can afford and a good tune.

I think you may be making some hasty calculations. What are you using as your VE constant? With the TD04HL and especially stock manifold, VE is way down above 4500 or so. It peaks in the 3500-4000 range...