mcantuaria23

Here another video from last pull yesterday but no much improvement. We might have to retorque the ARP heads studs and possible replace the head-gasket because today we smell some coolant around engine bay just to make sure. Possible the heads start to lift or shift a little bit, the car runs fine no leaks, just smell a little coolant after the dyno pulls.

http://www.youtube.com/watch?v=l--oMZn1eNQ

CraZee ZO6

you guys are doing 20lbs no meth!!!? straight pump? not smart?
whats the compression?

JMBLOWNWS6

That pull does not sound clean at all. Sounds like yall are pulling thru detonation. Look at the exhaust smoke (Color). I can see why you are pushing coolant. Maybe Im wrong or maybe just the video makes it sound but thats just my .02 I use NGK 7's and the stock coils. Have pushed stock ls1/6 coils to over 1k with no problem.

venomws7

+1 on everything.
IMO 20psi on straight pump gas 9:1 compression is just asking for something baaaaaaaad

mcantuaria23

The smoke is from the burning oil from the exhaust after we changed to the escavanger pump, it pulls clean up to 5k. We stopped at 6k because it breaks up and we only did 2 pulls at 6k rpm and call it a day. He checked everything from knocking to detonation and nothing showed up on the log. Everything was clean. I also want to clarify my statement about meth. I just spoke to Jeremy and he said the last to pulls he spray meth at top so the last two pulls was Gas+Meth. Was a misunderstanding from my part.

Vince99FRC

I agree with the others.. 20psi with twin 70mm's on 93 octane is a bit much. Hell I have smaller turbos and I have not even been over 18lbs and that's using 93 and meth... When it gets cold I add 100 octane to the mix with my meth...

Phiber Optik

What ended up fixing this issue? Did the truck coils help?

jmuck

Put a set of BR7EF's in it and tighten the gap up. Drop the gap to a .018 and let it eat. I didn't see it mentioned, but what wires are you running?

helga203

I would like to know also, but the thread is from 2011.: ack:

jmuck

****, I didn't even realize that, just saw the last post...

mcantuaria23

Well, thanks to bring my post alive again. Has been a long time, but here is a quick statement. After reading lots of post in different forums and different cars I decided to replace my stock coils to (silverado) hd 2500 coils also add BR7EF's plugs an the gab I can't remember now but is around .018. All the issued I had with this car it's gone once for all. The smoke from the video was a excess of oil coming from the turbos to the scavenge pump rated to 1gpm (pump couldn't' keep up), also I replaced the pump with badass TurboWerx Exa-Pump 3gpm and add the oil cooler kit. Problem solved. Also replaced the the turbos from 70mm to 57mm journals and increase the downpipes flow from 2.5" to 3" diameter make a huge difference. My car now run on 93 octane plus meth with 20# doing 1009 rwhp on mustang dyno.. here is some of the dyno graphic with low boost 8# 20# before and after 3" downpipe.


20# boost 2.5" downpipe + 57mm turbo .67 AIR = choking the the turbo


best result before 2.5" 847rwhp and after 3" downpipes 1009rwph gaind 162rwhp
20# boost 3" downpipe + 57mm .67 AIR = best result (dyno was cutoff at 6k and DC 104%)



Same run 1009rwhp at 20#





low boost 8# with 2.5" downpipe 57mm turbo + .67 air



low boost 8# with 3" downpipe 57mm turbo + .67 air
gain 85 rwhp with the swap

5 Liter Eater

Great numbers, in spite of the valve float you've got there. You need some springs and it will be a whole different car (although I'm sure it feels good now).

Also, are you using something to ramp in the boost? Why is it no fully spooling til redline?

venomws7

something is wrong with all of those graphs power is dropping like a rock after 5700rpm.
Why did you go with smaller turbos?

Where is the graph of the 1009 rwhp run?

mcantuaria23

I am using 8# springs at wastegate and boost control 15 and 20#. it's on full boost at 3500rpm. The guys
from Precision Turbo advise me to change the cold side of turbine from .80 to .67 to avoid turbo lag since I install the 3" downpipe so that way it will match the 57mm turbo. When the car was at the dyno Jeremy setup at 6k rpm cut out I believe and at 20# we max out the 80# injectors at 104% DC.

mcantuaria23

Sometimes big combination isn't always better, I tried different combos like 70mm turbo with .80 Air and 2.5" downpipes with 20# was good power but turbo lag was sucks even if I put the 3" downpipes and couldn't hit 1k mark quick enough. I also tried 70mm turbo with .67 Air with 2.5" downpipes the turbo was choking at top. Best combo for my application so far was to find a balance, downsize the turbo and increasing the flow so i don't have turbo lag or choking at the top end. All dyno runs was up to 6500rpm at the car dash but Jeremy set the dyno to cutoff 6k. I need to replace the injectors cuz was 104%dc.

5 Liter Eater

Obvious valve float is obvious. Valve springs, just sayin'. What springs are on it now and are the intake valves hollow? Stock rockers? Think of what the peak power would look like if you didn't have to overcome that >100 HP/TQ dip when they're floating!

mcantuaria23

here is the combo: Heavy duty dual spring, Turbo Cam 227 intake, 243 exhaust, 114 LSA lift .614 .624 @.50 and Comp Cam Roller Rocker Arm 1.7 ratio.