First track outing pt88 5.3
At 5 psi i would run timing around 24deg and start dropping as you increase boost. Get it dialed in that car is going to fly.
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From: jefferson city MO
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I am surprised the heads are not lifting on ya. 241s have the thinnest deck of any Ls head. I would be curios if a 3.23 or even a 3.08 gear would do better as it puts more of a load on the engine helping spool time.
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From: jefferson city MO
in my opinion if this thing lights off down low, i think it may pick 1-2mph on the big end pushing pass the limiter.
Maybe going to a 3.23 set anyway.
I did push a lil water at the first of this build as i only torqued the heads down to 6olbs, went back through after about 1000 miles and retorqued the heads to 70lbs with no problems as of now...
Plans when all said and done is to see 24-25psi on this engine.
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From: jefferson city MO
I have a brand new set of 28 10.5w sitting in the shop that went 10 street miles.... At full speed the grow to much getting into the fron/rear of the fender.
So went back to the 26 tire
So went back to the 26 tire
First off, sweet setup! I'm running a similar 5.3 @ 17psi 16*t and went 9.82 @ 143 this weekend. Pretty excited it was the first real WOT tuning I got to do with the car. (mines a good deal lighter than yours)
Have you tried turning the alky off for a pass? Local here runs e85 on his 10:1 5.3 with 26psi+ (76mm) on e85 alone so I think you'll be fine.
Don't get me wrong I'm all for keeping the meth inj on the car. But I've personally sprayed too much too soon and it KILLS the spool-up. Especially if you are running a water/alky mix. Is your alky controller progressive? Or you just have 3 nozzles coming on at full at different boosts? .
When I switched to 100% meth and went with a a progressive controller bringing the meth online slowly around 15lbs and full on at 30 it was a night/day difference. May be worth a try limiting the inj amount until the turbo is good and spooled anyway. I used 2 15gph rated nozzles (think they are rated at 100psi though) at 200psi on my 3.8. Alot of fluid overall. Was the difference between a 1.7 and a 1.4 60ft.
Good luck!
Have you tried turning the alky off for a pass? Local here runs e85 on his 10:1 5.3 with 26psi+ (76mm) on e85 alone so I think you'll be fine.
Don't get me wrong I'm all for keeping the meth inj on the car. But I've personally sprayed too much too soon and it KILLS the spool-up. Especially if you are running a water/alky mix. Is your alky controller progressive? Or you just have 3 nozzles coming on at full at different boosts? .
When I switched to 100% meth and went with a a progressive controller bringing the meth online slowly around 15lbs and full on at 30 it was a night/day difference. May be worth a try limiting the inj amount until the turbo is good and spooled anyway. I used 2 15gph rated nozzles (think they are rated at 100psi though) at 200psi on my 3.8. Alot of fluid overall. Was the difference between a 1.7 and a 1.4 60ft.
Good luck!
Last edited by Forcefed86; Jul 8, 2013 at 05:43 PM.
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From: jefferson city MO
^^^ thank you, i will try turning the meth off down low.. it does go fat right at 8psi 10.2 then comes out of it very fast as the turbo lites off.
I spray 3 nozzels all at once at 6psi of boost,
do you leave on a brake or foot brake?
I spray 3 nozzels all at once at 6psi of boost,
do you leave on a brake or foot brake?
I’d suggest a progressive controller if it’s in the budget. You can pick them up semi cheap these days. (check out devils own progressive controller) Or You could grab a solenoid and a boost switch (also found at devilsown.com) and turn on one nozzle at say 10psi and the other 2 at 15+. Def. don’t want it coming on during the burnout or when you’re trying to build boost off the line.
With the Th400 in my car and the 3.55 gear I could not build boost either 1st gear is too low. I switched to a 3.00 gear and much better, havnt track tested yet though.
I previously had a glide in it and could foot brake it up to 11psi. To make my TH400's 1st gear the same as when I had my glide i'd need a 2.86 rear gear. With the glide I footbraked 1.41 60fts. I only have a 76mm and also a 3800-4000 stall and also 28" tires. I'd agree your gear and those small tires are killing you.
I previously had a glide in it and could foot brake it up to 11psi. To make my TH400's 1st gear the same as when I had my glide i'd need a 2.86 rear gear. With the glide I footbraked 1.41 60fts. I only have a 76mm and also a 3800-4000 stall and also 28" tires. I'd agree your gear and those small tires are killing you.