60 ft blues

[Steve Wood]

I wonder if that turbo is capable of supplying enough air on the top end of each gear?

[Tim Hensley]

With no map do we even know?

[Scoobum]

Tim is that a Precision or Garrett exhaust housing? Steve...the 5857 is pretty much the replacement for the 44/49.

[Steve Wood]

Yep, that's the reason I wondered.  He has a pretty strong engine and is turning a lot of rpm.  I have seen a couple of good engines that died on top end due to insufficient air coming out of a 49. 

[Scoobum]

Think Tim is running 24ish PSI of boost. It'd be pretty much out of breath. Likely is the larger Precision exhaust...whic h would make spoolup characteristic s tougher than the smaller Garret. Tim you need to get the low gear fueling around the 780's...that'll help it spool quicker. Don't sit on the footbrake for more than 3-4 seconds or you'll fry the clutches in the transmission. I assume the blue alky knob is on the default.

[Tim Hensley]

It is precision ex and I try not to sit on the break very  long
I’ll look at some logs tonight

[Scoobum]

Tim...can you get someone to video the rear 1/4 of your car leaving the line. You might see it bottoming out the rear suspension and unloading the rear tires...like mine did. I don't know shit about IC or pinion angles...so I came up with a keep it simple stupid fix for it. Car did 1.5's like it was a walk in the park after the fix.

[Scoobum]

Don't let the trans temp go over 200. Logs show your trans shifting real nice. Think I read in this thread you've gone 11.5. God forbid if you launch it a little harder and get the fueling dialed in. Temp around 65-70 and 50 to 60 percent humidity...it'll crack the 10's.

[Scoobum]

Steve...here's the charts and writeup from Patrick when he did his last stint at Precision. That turbo on Tims car...should spool like a mad whore with that convertor he has according to Patricks chart. My car was a pig with Arts 16930 and the 6262 JB I had with Ercis chip on the default settings. You could get out and run faster. Jump the low gear timing to 34 degrees and the low gear 02's just below 800 and it left the line like no ones business.


Tim...don't bump the timing like I did. I ran race gas.


Tim gets the low gear fueling dialed in...and adds maybe 2 degrees of low gear timing...watch what happens.


https://turbobuick.com/threads/precision-turbos-new-turbo-listing-for-buicks.296529/

[Tim Hensley]

Latest with MT Bracket Pro

[Tim Hensley]

Time slip

[Tim Hensley]

log file

[good2win22]

Nice slip!

[Scoobum]

Frame 49.900 shows wheel spin. Low gear tune is way fat. High gear 02's at the traps was about 823. MPH is decent. What was the temp and humidity?

[Forzfed]

Nice slip!  Car has good mid range pull.