i have a fmu that is12-1 (2.70 inchs disk)would it be safe (or to much)to run my supercharger at 6 pounds of boost with my stock inj(99 cavi 2.4)?
I also have one for sale lol
2004 Cavalier Sedan
And I have a CarTech one for sale... fully adjustable.
Why dont these fmu's go on sale when i need one haha....
besides being able to electronically dial in the fueling what benefit is a 2 bar setup over doing a rising rate FMU, anyway?
RIP silver car. You will be missed.
No this will not work, you need to tune it.
Brad - a 2 bar map sensor on its own will allow you to electronically deal with both fuel and spark - spark being the more important of the two.
A FMU works fine for dialing in fuel under boost - much like a carburetor it's crude and inaccurate but it works... it just won't do squat for timing.
-Chris-
-Sweetness-
-Turbocharged-
Slowly but surely may some day win this race...
ok but why cant you tune the timing down? i just did this (well i added) to mine, i added 2* from 4000-6500rpm but you could sit there and screw with all kinds of settings for timing under rpm.
RIP silver car. You will be missed.
He's asking about using a rising rate FMU to add fuel. It can't touch timing, Brad. lol.
Also be careful with the timing you add (a bit late to give you the advice now but...) - when I dyno tuned a LD9 GMSC last year 1 degree of timing added was the difference between 198 whp and 206 wtq and 209 whp and 202 wtq. I kid you not.
(Meaning I added a degree of timing and lost HP but gained torque which the owner didn't want so I put it back down 1 degree and re-dyno'd to the same previous results.)
-Chris-
-Sweetness-
-Turbocharged-
Slowly but surely may some day win this race...
SweetnessGT wrote:He's asking about using a rising rate FMU to add fuel. It can't touch timing, Brad. lol.
Also be careful with the timing you add (a bit late to give you the advice now but...) - when I dyno tuned a LD9 GMSC last year 1 degree of timing added was the difference between 198 whp and 206 wtq and 209 whp and 202 wtq. I kid you not.
(Meaning I added a degree of timing and lost HP but gained torque which the owner didn't want so I put it back down 1 degree and re-dyno'd to the same previous results.)
-Chris-
lol i know im talking about using HPT to dial the timing in WITH the FMU. you said that timing is it's main downfall but if you tune for it, i dont see the problem? lol
RIP silver car. You will be missed.
-Z Yaaaa- wrote:SweetnessGT wrote:He's asking about using a rising rate FMU to add fuel. It can't touch timing, Brad. lol.
Also be careful with the timing you add (a bit late to give you the advice now but...) - when I dyno tuned a LD9 GMSC last year 1 degree of timing added was the difference between 198 whp and 206 wtq and 209 whp and 202 wtq. I kid you not.
(Meaning I added a degree of timing and lost HP but gained torque which the owner didn't want so I put it back down 1 degree and re-dyno'd to the same previous results.)
-Chris-
lol i know im talking about using HPT to dial the timing in WITH the FMU. you said that timing is it's main downfall but if you tune for it, i dont see the problem? lol
If you are going to tune your timing, why bother with the FMU in the first place?
- Your not-so-local, untrained, uncertified, backyard mechanic. But my @!#$ runs
good question! lol... chris?
RIP silver car. You will be missed.
