Yay! My first drive with the 95# injectors went very well. The tune is close enough, although the short bursts of WOT were a tad lean. My streetability worries were unfounded - the engine idles happily at 900 and off-idle throttle response is crisp. There was no stumbling, stuttering, or any other unpleasantness. Idle pulsewidths are 1.0 - 1.1 ms and idle BLMs with my first-draft tune were 118/111. The blow through MAF is working fine.

And the ys-trim power feels good. The 315 Nitto drag radials will not take WOT with the TH400 in third at 65 mph.

The rushing air sound from the Mondo bypass is a bit much, and the vacuum pump makes a furious racket, but those are pretty minor tweaks.




LJ

 

Where did you hook up the Vacuum pump? What kind did you end up using? Are you having any problems with the pump sucking oil from the crank case, or did you make some sort of trap? Glad to hear they work great!

Bill

 

With the gen6 dfi, VIC and 96# injectors my car idled and ran fine as well. Now with the gen 7 sfi I bet it's even better, maybe I can even get it to pass smog!

 

Man your running way rich, i though I wa running on the rich, I just put in my blower about three days ago and my blm were like 117/78 for the ltrems and the shorts trimswere just about identicle. Im not sure as to why this is but I sure can smell it

 

cool, glad to see you got her up and running LJ, you will have to call me and let me know how things work out after you hit the track!....Im all done with the 8-ribbed adventure for now, I have a cog set-up on the way, I was able to squeek a 9.52 @142 with a slipping belt and 14pnds boost this past weekend at super chevy

 

That's crazy - 95#/hr injectors streetable with stock PCM!

I can't wait to come by to hear it and see it. Are you planning to take it to the track first or to the dyno first and make sure to let me know.

How does the YS trim sound.

cheers

 

I guess I forgot to subscribe to my own thread - didn't realize there were replies.

The vacuum pump is hooked to a Moroso breather/separator in the pass side valve cover. There is no oil in the pump discharge, so I'm thinking the Moroso part is doing its job.

With just the standard header/collector/intake bolt tightening and a fresh set of plugs (and no PCM tuning) the idle BLMs are now 119/115. This is with 95 for the injector constant and stock offsets. Yeah, it's a bit rich, but well within BLM range.

Thanks for the order, Brook! Keep me posted on your tuning progress.

Rob, I'll letcha know when I'm heading to the strip - when will you be coming to Sac? And what pulley ratio did you settle on? I've only rev'ed to 6k so far, but the boost plateaus at 13 psi. I though it would be in the upper teens.

I'll call Keith at FFP to set up a dyno day as soon as all the bugs are worked out. Hopefully in a week or so. The ys-trim is not as loud as the s-trim was, but the Mondo bypass is *really* noisy.

 

LJ, are you running an open loop tune?

My concern with running big injectors with the stock pcm is that Matt Harlan says that there is a big lean dip right when you go WOT because the block learns are going nuts...

I have a set of 83 Siemens going in with my YS Trim, but I bought an AU pcm piggyback controller to use.

I'm an LS1 but I'm pulleyed for 20 lbs and I hope to run good too.

PSJ

 

Nope, I'm running a closed loop, MAF-based tune. I have not seen a lean dip on the WOT transition. If your closed loop BLMs are neutral or rich, they will snap to 128 when PE is entered. If the closed loop BLMs are lean, you can use Christian Millard's BLM locker patch to force them to 128 when PE is entered.

Even without the BLM locker patch, lean closed loop BLMs will be applied in PE mode making it richer than the base tune, not leaner.

BTW, I'm using "rich BLM" to mean less than 128 and "lean BLM" to mean above 128.

 

I need a glossary, are your "block learns" the same as "blms" and what we LS1'ers call "fuel trims?"

So are you planning to just run unleaded gas and planning to still use 02's? What about your MAF?

My Aussie box has low impedance drivers, and will allow me to run an open loop tune or to clamp the MAF and run closed loop. But that will limit me to a 104 unleaded tune and that might mean <700rwhp... what do you think.

 

Glossary? Go to http://para.noid.org/~lj and click on PCM Tutorial.

Yes, I've always run unleaded and plan to continue. Are you thinking that 104 won't be enough octane? I'm assuming it's as easy in LS1-Edit to toggle between closed and open loop as it is in LT1-Edit. You could pull the O2s on race day, switch the tune, and run 110 leaded. But you'be be flying blind without O2 feedback. EGT sensors would help out in this case.

 

I have a borrowed Autronic wideband to play with, but I am probably not going to switch back and forth since the car won't really be on the street this year since I first have to get it running and have the custom intercooler built. I am most likely going to go to a open loop tuning shooting for 11.5:1 AF at WOT with about 22 degrees of total timing. NMRA stangs run primitive PMS stuff and basically they are running static open loop setups.

But I have not found anyone who made more than 700rwhp on a dynojet yet on unleaded gas has anyone? I'm a 9:1 LS1, 20 lbs YS trim setup, 8 rib, and air/water cooler. I think if I see 16+ lbs of boost I'm in the money.

 

Great to hear Jeff! Did you get any pics of your new blower/intercooler plumbing? I *heard* it was trick

Thanks, Jason

 

I had made 598rwhp on a mustang type dyno with just over 11# with the S-trim on 91 octane and no ice in the aftercooler. I think you and LJ will be well over 700rwhp with LJ using unleaded gas. YellowZ28 (Rob) is making 700rwhp and he is probably using unleaded gas with a 8-ribbed setup on his YS which he is moving now to a cog setup.


Hi Jason - check out http://para.noid.org/~lj/1000hp/1000hppage4.htm
http://para.noid.org/~lj/nicepipes.jpg

 

Rob has DFI and might be running 110-116 leaded... Not sure, but his mph shows that he's making at least 700rwhp.