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#201 |
Sleazebag 7-9 Owner
Join Date: Dec 2015
Location: NoVA
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![]() Good luck man!!! Keep us posted on the low timeslips
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#79WDP 2006 XC70 Wagon - "Chuck Feo" - Daughters ride - stock 1992 965 - "Savage Wagon" w LS 5.3 LM7 + LS7 cam + GM T5 swap in progress. 1983 Jeep Cherokee - LS 5.3 LM7 + LS9 cam + SM465 swap in progress 1971 Chevy C-10 w 5.3 LS (LS2 cam) & GM T5 trans |
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#202 |
educator monkey
Join Date: Apr 2010
Location: south jersey
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btw, lovin the build. |
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#203 |
That One Guy
Join Date: Nov 2009
Location: Oregon City, OR
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![]() That is what it does.
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#204 |
educator monkey
Join Date: Apr 2010
Location: south jersey
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![]() I might be answering my own question again, but if the pump output is increased at the same kPa/RPM, then that is something that would require less VE at the same kPa/RPM which means a bit of retuning.
Is the voltage output of the multipler consistent? Was the choice to go with the pump multiplier instead of larger injectors? |
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#205 |
BRANDSCHUTZVORSCHRIFTEN!
![]() Join Date: Dec 2002
Location: mont, AL
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![]() moar volts is betters. if the ecu can handle it, coils hit harder, injectors work faster, pumps pump more.
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"They bum rushed them in their own crib, they drank all their beer, they partied with their ladies and they left with the trophy" Now with in-house Dyno tuning! Megasquirt Tuning! Plug and play LH 2.4 Megasquirt, now with stealth mode! |
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#206 | |
Turbo LS ****poster
Join Date: Jan 2013
Location: Kenly, NC
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Voltage output is constant 17.5v independent of input voltage(to a point obviously) when activated. Im triggering the booster prior to when I was loosing fuel pressure before. So that area is fine but the part of the map that was overcompensating on the pulse width to bring my AFR back in line is now overly rich. Back to the updates! New best time! 7.5 @103 ![]() Left the line at idle and floored it right away. Viewing the datalog I seem to be lifting as boost comes up in first gear. Not sure why though I dont remember lifting at all... This was at 12psi 13ish deg timing on e85. Going to turn the boost up to 15psi and make a few more passes. Got some great datalogs too of the Boost-A-Pump working great prefect fuel pressure the entire pass. My wife took a few videos for me. Had a blast last night. Overall great time. |
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#207 | |
Turbo LS ****poster
Join Date: Jan 2013
Location: Kenly, NC
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The walbro 450 is an animal when fed the proper voltage. |
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#208 |
Sleazebag 7-9 Owner
Join Date: Dec 2015
Location: NoVA
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![]() That last video coming around the Mustang was beautiful!
![]() Sorry if I missed it, but why not leave harder? What stall converter RPM? Traction? trans brake? And I say that because you all pulling all of them on the back half. Once the launch is perfected, you are going to make some people cry looking at your taillights! |
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#209 |
Board Member
![]() Join Date: Jul 2009
Location: Monterey/Falun
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![]() Did you verify the timing???
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1979 Volvo 244DL 6.0/4l80e,8.8,Ms3x goldbox ecu and Mircrosquirt tcu, GTX4202r, 228/230cam, tbss intake, 11.4@123mph 9psi 1991 Volvo 245, Efan conversion, tcam, 4.10s, Aw71L 1982 Ford Fairmont Futura, 4.8/th400, 8.8, mircrosquirt, 7875 turbo, 228/230 cam, Project Cheap Thrills |
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#210 | |
Turbo LS ****poster
Join Date: Jan 2013
Location: Kenly, NC
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Once the launch is dialed, its gonna be mean at the track. Not yet. I need too, but I've been too lazy. I need to find the right kind of timing light too. I have a fixed one the just flashes, no dialback or readout. Last edited by Andrewhans; 07-08-2018 at 08:24 PM.. |
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#211 |
Sleazebag 7-9 Owner
Join Date: Dec 2015
Location: NoVA
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![]() [QUOTE=Andrewhans;5822600]Once the launch is dialed, its gonna be mean at the track./QUOTE]
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#212 |
Turbo LS ****poster
Join Date: Jan 2013
Location: Kenly, NC
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![]() Got the 2 step working. First video is 2500rpm and -2 timing second video is 3800rpm and -4 deg timing.
Didnt really do mich better. Im traction limited. The open diff is ****ing me on the burnout and at the 60'. I dont want to weld it bc I drive it on the street quite a bit and don't want it to be miserable and destroy the bushing back there any more than they are lol. ![]() |
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#213 |
Turbo LS ****poster
Join Date: Jan 2013
Location: Kenly, NC
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#214 |
Board Member
![]() Join Date: Jul 2009
Location: Monterey/Falun
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![]() That looks so gross man. Haha
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#215 |
Turbo LS ****poster
Join Date: Jan 2013
Location: Kenly, NC
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![]() Lol, pretty doesnt equal fast. It's secure and with how big that filter is, I dont ever see needing to change it out. Ill increase my fuel line size before its dirty at all. I will cut it open when the time comes to change it.
I was trying to find some solid data on a voltage boosted(over 13.5v) walbro 450 and could find nothing on the internet. So I went to the source. Sent TI Automotive an email asking about data and charts. I received this in return. ![]() He did mention to expect shortened pump life when running these higher voltages. My voltage booster when triggered outputs around 17.5v with 40amps available current at that voltage. These walbro 450 pumps are monsters when fed the power they need. Zero fuel pressure issues with e85, deka 80's, 15psi, 6800rpm with a 7875 on a 4.8. Should be in the 530-550whp area on a Mustang dyno. Duty cycle tops out at 83% at 15psi which is far better than the 104% I was seeing at 12psi before. At 73psi of rail pressure the flow increase from 13.5v to 17v is around a 40% increase. |
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#216 | |
Board Member
Join Date: Jun 2010
Location: San franpsycho
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![]() Plz get a timing light and dial that in.
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#217 |
Board Member
![]() Join Date: Jul 2009
Location: Monterey/Falun
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#218 | |
Turbo LS ****poster
Join Date: Jan 2013
Location: Kenly, NC
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I ask because at 14-15psi it feels VERY strong for only commanding 11-12 deg of timing under boost. |
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#219 |
Board Member
Join Date: Apr 2007
Location: Portland Oregon
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![]() How many times have you changed your center bearing support rubber on you driveline?
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STSmachining |
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#220 |
educator monkey
Join Date: Apr 2010
Location: south jersey
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EDIT>>> I Looked at the graph... I guess I still have a couple questions. How does MS account for the increased flow? Does it have a fuel pump output vs voltage table or do you correct for it in VE? In other words, you have to tune for it.... if that's the case, is the voltage-flow output consistent? answered my question on that part. I could imagine the tuning would be difficult if the voltage-flow output was changing. and one more... do you have it set such that the pump voltage ramps up or is it just a reach a certain boost and pump booster turns on? Thanks. Mike Last edited by 740atl; 07-23-2018 at 03:08 PM.. |
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#221 | |
Board Member
![]() Join Date: Jul 2009
Location: Monterey/Falun
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#222 |
Turbo LS ****poster
Join Date: Jan 2013
Location: Kenly, NC
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![]() Just the first time when I had the driveshaft built. Put a new bearing and rubber on it.
Last edited by Andrewhans; 07-24-2018 at 09:30 AM.. |
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#223 | |
Turbo LS ****poster
Join Date: Jan 2013
Location: Kenly, NC
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The booster comes on like a switch. Either on or off. I have the ecu trigger it at a certain point that I can change or set to whatever I want(MAP, Throttle, RPM...) What I did to minimize the amount of tuning needed was turn on the booster just before I would have normally started dropping fuel pressure so I don't actually have a pressure spike or anything in my datalogs. I now just have steady fuel pressure. I guess I don't look at any of those variables now. I simply monitor the fuel pressure, AFR and VE1. As long as the AFR is what I'm commanding and the fuel pressure is steady I set the VE to whatever the engine needs. EDIT: The flow through the injectors doesn't really change because the pressure stays the same with the regulator doing it's job. As long as you weren't increasing injector pulsewidth before hand for a "lack" of flow/pressure, there should be no tuning around the pump coming on(as long as you aren't overrunning the regulator when the extra flow occurs) Last edited by Andrewhans; 07-24-2018 at 09:21 AM.. |
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#224 |
Turbo LS ****poster
Join Date: Jan 2013
Location: Kenly, NC
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![]() No wonder my plugs are reading like there's a bunch of timing in it haha. I've also been consistently finding little balls of aluminum on my plugs and heads... it all makes sense now. Need to find/rent a dial back light really bad now lol
I have a standard fixed timing light and have thought about installing a timing tape on the balancer, finding cyl 1 TDC and locking timing at like 14deg at idle and checking it then. I'm probly running nearly 17-18deg of timing at 15psi... A bit aggressive I would say. Really surprised I haven't spit out a rod or melted a piston ![]() |
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#225 |
Board Member
![]() Join Date: Jul 2009
Location: Monterey/Falun
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![]() I had mine like that for a long time on 91 octane. It was sitting at around like 22 degrees. Didn't loose any material but still. Lol
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