need MS for dummies

Just install MegaSquirt or some other system that allows you to tune your car, or just have a question about tuning and the options available? Feel free to ask it here.
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BlueR/T
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need MS for dummies

Post by BlueR/T » Thu Nov 15, 2007 9:49 pm

so next week i will be ordering a megasquirt super420A 3bar from rs autosports,

what else to i need to order with it

and then, what do i need to run it with a srt turbo and 24# injectors

racer12306
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Post by racer12306 » Fri Nov 16, 2007 10:51 pm

http://forum.2gn.org/viewtopic.php?t=14943

This is a FAQ that is on 2gn that someone assembled. He is pretty good with the MS computer. Another person to talk to is esteimaier (I think that is how you spell his name).
Please PM or email me if you see any issues with the site.

racer12306@2gn.org

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DOHCRT
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Post by DOHCRT » Sat Nov 17, 2007 9:59 am

You will need injectors bigger than 24 lbs. You will be running those at well over 80% duty cycle, and they wont last long at all. If you're not using a 1:1 with the MS, get at least SRT stage 1 injectors (~47 lbs.).

It really depends a lot on how much boost you plan to run. The higher the boost, the smaller the injector effectively becomes at a static fuel pressure.
"Losers always whine about their 'best'. Winners go home and fuck the prom queen"

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BlueR/T
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Post by BlueR/T » Sun Nov 18, 2007 8:31 pm

I plan to run about 7-8 PSI until i can afford to get forged pistons, then i plan to run 10 normal, and 15 when racing

will the 24lb injectors work for now, because they are from another car that ran 7 psi on them with a rrfpr

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1fast2liter
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Post by 1fast2liter » Sun Nov 18, 2007 8:39 pm

you can run up to 10 stock tuned and with forged internals you only be limited by your turbo and fuel.....
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96 blue coupe sold
96 white 4 door sold
95 blue sport parted out
97 straberrie red coupe sold
95 black base parted out

current drivers
97 dodge ram 1500 5.9 ext cab sport fire engine red. tinted windows cat back exhaust suer chips tune, 1 mephis audio sub

90 audi 80. 400 miles to the tank
2002 custom sportster 90 whp and quick too

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DOHCRT
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Post by DOHCRT » Sun Nov 18, 2007 9:54 pm

BlueR/T wrote:will the 24lb injectors work for now, because they are from another car that ran 7 psi on them with a rrfpr
An RRFPR raises fuel pressure to compensate for the small injectors and short pulse-width when used with the factory PCM. Injector duty cycle remains within a normal range because the injectors get effectively "bigger" with the added fuel pressure. At 7psi of boost, the fuel pressure with 24lb injectors was probably near or over 100psi.

With MS, you will use a longer pulse-width to add fuel instead of increasing fuel pressure. Even with a 1:1 regulator, injector duty cycle would be well over 80% (maximum safe limit) and would burn the injectors up quickly.

You could try to use an RRFPR with the MS, but that sounds like a tuning nightmare. Do it right and get bigger injectors. You can get a set of SRT stage 1's for around $50 - $80 used. To me, its worth it not to blow my engine up for that price.
"Losers always whine about their 'best'. Winners go home and fuck the prom queen"

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1fast2liter
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Post by 1fast2liter » Mon Nov 19, 2007 1:13 am

x2
Image

96 blue coupe sold
96 white 4 door sold
95 blue sport parted out
97 straberrie red coupe sold
95 black base parted out

current drivers
97 dodge ram 1500 5.9 ext cab sport fire engine red. tinted windows cat back exhaust suer chips tune, 1 mephis audio sub

90 audi 80. 400 miles to the tank
2002 custom sportster 90 whp and quick too

chipdogg
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Post by chipdogg » Tue Dec 11, 2007 8:58 pm

Can get the GM IAT and CTS sensors as well. Cheap enough and you don't have to mess with Easytherm
'97 black ACR coupe- #3 - Scrappy
'96 black coupe- #4
'97 magenta coupe- #10 - 13.379 @ 101.07 mph
'04 SXT mtx - #45 - GF's DD
'96 ACR
'95 Astro Van
'11 Chevy Express
'02 atx - #48
'98 Intense Blue R/T - #49
'04 SRT-4 - #50
'99 Intense Blue R/T - #51

52 and counting, when will it stop?

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