• The site migration is complete! Hopefully everything transferred properly from the multiple decades old software we were using before. If you notice any issues please let me know, thanks! Also, I'm still working on things like chatbox, etc so hopefully those will be working in the next week or two.

Resevoir for intercooler?

Scottydoggs said:
does the fmhe stick out past the bumper cover? aka buck tooth?
Click to expand...
Just barely maybe a 1/4" max and thats probably the bumpers fault. My bumper cover is all bent up and distorted. In a week or so on a day its not 120* ill be trying to do some custom duct work so that its not noticeable and forces more air into the he. I'm just too drained from the heat and everything.

Sent from my LG-H918 using Tapatalk
 


Well I didnt have a lot of time tonight but I went out and did a nice conservative tune. I was able to lean the fuel trims out a little bit and now instead of running 16* timing I'm running 23* 😮 with not even a blip of kr. I'm starting to wonder if I accidentally spilled some of my redbull in the gas tank because this car is flyingggg!! Lol

Sent from my LG-H918 using Tapatalk
 
I thought as a general rule you could run up to 25 and then at that point you risk blowing head gaskets and such

Sent from my LG-H918 using Tapatalk
 


really the best way to find out is to put it on a dyno and see where the best power is made, without doing that, it's just speculation. I've heard of people running 25* timing advance, and do it for a long time, but there is always the exception to the rule. 23* of timing is on the high end, but if it doesn't have kr, it might be ok, but if something goes wrong with your car, like that misfire you had, then that much timing could be really bad.
 
SgtMarshal said:
really the best way to find out is to put it on a dyno and see where the best power is made, without doing that, it's just speculation. I've heard of people running 25* timing advance, and do it for a long time, but there is always the exception to the rule. 23* of timing is on the high end, but if it doesn't have kr, it might be ok, but if something goes wrong with your car, like that misfire you had, then that much timing could be really bad.
Click to expand...
Well looks like ill be dropping to a 2.8 pulley and pulling some timing. That's crazy that the intercooler helps that much even when ambient temps are well over 100*. Anyone have a 2.8 for sale?

Sent from my LG-H918 using Tapatalk
 
You still are probably picking up power beyond 24° but it's hard on the motor. Anything over 20° worries me. I would pull timing back to 18-19 and pulley down til you start to get kr.
 
our high angularity rotating assembly geometry produces high piston acceleration/deceleration rates than a long rod/tall deck it also means that shooting for peak cylinder pressure at 30-40* past TDC doesn't help much as its deceleration speed approaching TDC doesn't allow for much additional time for flame propogation at early timing, basically the piston just fights to compress the explosion more the earlier the plug is fired while not putting the cylinder pressure spike any earlier or at a better crank angle for the most efficient power production from the bang.

this is part of why its such a damned good low/mid rpm range Tq monster
 


My Thrasher car was happy as hell with a 3.0" on pump gas with a 9.5:1 motor. Mid 11's AFR and 19-20*. Never cared and pulled hard.
 
blueguy91 said:
My Thrasher car was happy as hell with a 3.0" on pump gas with a 9.5:1 motor. Mid 11's AFR and 19-20*. Never cared and pulled hard.
Click to expand...
Ya i think I finally have converted to timing>boost I've dropped .2 pulley size plenty of times and it was a nice little power pickup but when I just tuned from 16* timing to 22* like holy cracker jacks the car might as well be a frickin rocket ship now! I'm a topswapped gt so I'm running 9.4:1. I'm still running pretty rich too. Currently in the 10.5 range

Sent from my LG-H918 using Tapatalk
 
I'd back the timing down to stock, run the AFR up to 11 flat at least. See what you get away there on the same size pulley you're at. Too rich isn't good either because you start the fuel wash effect in the cylinders. No bueno.
 
Way too many people run rich.
Our rotating geometry and mixture turbulence as it hits and goes past tdc is friendly to lean.

Remember the TR ran 11.5 @128 @ 13:1 @ 18°....

Part throttle afr should be 12 in pe. Only wot should hit 11-11.6 over 2500rpm.
Below 2500 should be a hair richer
 
Turbocharged400sbc said:
Way too many people run rich.
Our rotating geometry and mixture turbulence as it hits and goes past tdc is friendly to lean.

Remember the TR ran 11.5 @128 @ 13:1 @ 18°....

Part throttle afr should be 12 in pe. Only wot should hit 11-11.6 over 2500rpm.
Below 2500 should be a hair richer
Click to expand...
I thought when intercooled and running e85 you should aim for low 11s during wot

Sent from my LG-H918 using Tapatalk
 


Almost every engine will have a different volumetric efficiency then the next but with testing I'm at 12.4 AFR in PE at part throttle and at 11.8 at wide open throttle.
E85 loves lean
 
Just a hair lean.

Disable pe and you can run closed loop at 14.7 @ wot....power is a good bit down vs the richer mixture....but holy **** does mpg improve....as well as the maf table/tune....since closed loop.
 
Turbocharged400sbc said:
Just a hair lean.

Disable pe and you can run closed loop at 14.7 @ wot....power is a good bit down vs the richer mixture....but holy **** does mpg improve....as well as the maf table/tune....since closed loop.
Click to expand...

Curious, for both you and suitercrew, at what throttle position is PE mode enabled on your build? Mind sending a screen shot of your PE enable table?
 
You must log in or register to reply here.
Back
Top