Where are the FWDs at????

[RichardB]

Im running 24.5s and I shift into 4th around the 1/8th. That's even when my power was down to where I trapped 118, and is the same all the way up to 128 so far. I shift no higher than 7200.

24.5s super wide is the only way to go if you can. It yields the highest mph per gear. But that's if you can get away with the smaller tire.

what gear ratios do you guys have and whats your standard rev limit?

 

[Jaxness]

With those tires and the stock fwd gearing you shouldn't be shifting into 4th at all. I was going through the traps at 140 in 3rd at 8800rpm. I tried shifting to 4th to see the difference and it obviously slowed me down.

I agree though about 110 traps being way off from the power it should be making. You're missing about 20mph! Go find it

I've only raced at about 380-400hp. Pump gas with the boost turned down, so she's not at her full 500hp capability.

 

[pneumo]

what gear ratios do you guys have and whats your standard rev limit?

Here's a handy chart showing most DSM gear ratios.
Tranny gear ratios for DSMs
Many of the FWD ratio's are interchangeable, but the 1.8 NT stuff is weaker.

 

[LandSpeed-DSM]

Copy/Paste from FB - Ran out of time after 3 pulls. AFR was super fat 11.2:1, real conservative timing, runs cut short at ~7500 while we got the baseline in, never turned on the water nozzles and still made 410whp on 15psi! Fuel was E70" lot of power left yet in just leaning on the tune and winding out higher! This was a Mustang dyno.

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Torque only trails off even the slightest because cells at that load past 7000 hadn't been tweaked yet.. which shows pretty distinctly on the graph

E70
V3 SD
67mm Cast HX52 16cm T4
NPR 7.8:1 CR
6-bolt rods (ACL Grooved bearing/ARP Rod bolts)
Regular ARP Head studs
JMF Drag IM
Custom T4 Divided EM
Stock 1G Head
GSC S3s
Fidanza Cam gears (0* I / 0* E)
Kiggly HP Beehives
Kiggly HLA
Converted AWD Shep Stage 4
4.153 Final Drive FWD Quaife LSD

Water injection system was in car but not armed.. think thats all the relevant info.

 

[Pipnorcali]

I've only raced at about 380-400hp. Pump gas with the boost turned down, so she's not at her full 500hp capability.

Your mph is still low are you leaving it in third?

 

[goodhart]

Here's a gear calculator, it has Evo gear ratios in it as default, but you can put different values in.



This is also using stock sized tires on each car.


Speed . . . FWD Turbo DSM. . . . . FWD N/A 1g DSM

55 . . . . . . . . . 2250 . . . . . . . . . . 2375

60 . . . . . . . . . 2500 . . . . . . . . . . 2600

65 . . . . . . . . . 2750 . . . . . . . . . . 2800

70 . . . . . . . . . 2950 . . . . . . . . . . 3000

75 . . . . . . . . . 3200 . . . . . . . . . . 3250

80 . . . . . . . . . 3400. . . . . . . . . . 3450

85 . . . . . . . . . 3600. . . . . . . . . . 3675


And for full throttle acceleration considerations, here is a break down of what speed you are going at the top of each gear just before shifting to the next higher gear (assuming shifting at stock redline of 7,000 RPM) and what RPM you enter the next higher gear at.

Gear . . . . FWD Turbo DSM. . . . . . . FWD N/A 1g DSM

1st . . . . . . 39.8 (4125) . . . . . . . . . . 36.5 (4050)

2nd . . . . . . 66.9 (4850) . . . . . . . . . . 63.2 (4650)

3rd . . . . . . 96.6 (4900) . . . . . . . . . . . 95.5 (5100)

4th . . . . . .138.2 (5850) . . . . . . . . . . 130.7 (5650)

5th . . . . . .165.6 (N/A) . . . . . . . . . . . 162.3 (N/A)

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Gear . . . . Turbo 24.5" . . . . . . . . . . . Turbo 26"

1st . . . . . . 40.1 (4150) . . . . . . . . . . 42.5 (4150)

2nd . . . . . . 67.4 (4550) . . . . . . . . . . 71.5 (4650)

3rd . . . . . . 101.5 (5100) . . . . . . . . . . . 107.7 (5100)

4th . . . . . .139.1 (5850) . . . . . . . . . . 147.7 (5850)

5th . . . . . .166.7 (N/A) . . . . . . . . . . . 177.0 (N/A)


*This will not account for tire growth at speed, it's just to show the difference between 24.5 and 26" tires*

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[richard33]

Copy/Paste from FB - Ran out of time after 3 pulls. AFR was super fat 11.2:1, real conservative timing, runs cut short at ~7500 while we got the baseline in, never turned on the water nozzles and still made 410whp on 15psi! Fuel was E70" lot of power left yet in just leaning on the tune and winding out higher! This was a Mustang dyno.

You must be logged in to view this image or video.

Torque only trails off even the slightest because cells at that load past 7000 hadn't been tweaked yet.. which shows pretty distinctly on the graph

E70
V3 SD
67mm Cast HX52 16cm T4
NPR 7.8:1 CR
6-bolt rods (ACL Grooved bearing/ARP Rod bolts)
Regular ARP Head studs
JMF Drag IM
Custom T4 Divided EM
Stock 1G Head
GSC S3s
Fidanza Cam gears (0* I / 0* E)
Kiggly HP Beehives
Kiggly HLA
Converted AWD Shep Stage 4
4.153 Final Drive FWD Quaife LSD

Water injection system was in car but not armed.. think thats all the relevant info.

Glad you got it on the dyno. I hope there is more in the 67mm hx52! I made 450whp @ 19lbs with the hx40. Hopefully you get more time to get the tune dialed in on the dyno next time out.

 

[pneumo]

That's the oddest looking Mustang Dyno chart I've ever seen!
(where's the :brainfart: smiley?)

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[LandSpeed-DSM]

That's the oddest looking Mustang Dyno chart I've ever seen!
(where's the :brainfart: smiley?)

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Fair enough, looks like I had one too!

Finally something more substantial than a still of a partially disassembled engine bay:

Exterior:
[ame=http://youtu.be/JtP0aJ2ZkyQ]Cold Start HX52 1G DSM (Exterior) - YouTube[/ame]

Interior:
[ame=http://youtu.be/hUjuj1ADGeg]Cold Start HX52 1G DSM (Interior) - YouTube[/ame]
(forgive the GoPro rattling..)

Hopefully I can get out and tune a bit this weekend and get some action shots. Should get a proper dyno session in on 11/9!

 

[keltalon]

Fair enough, looks like I had one too!

Finally something more substantial than a still of a partially disassembled engine bay:

Exterior:
Cold Start HX52 1G DSM (Exterior) - YouTube

Interior:
Cold Start HX52 1G DSM (Interior) - YouTube
(forgive the GoPro rattling..)

Hopefully I can get out and tune a bit this weekend and get some action shots. Should get a proper dyno session in on 11/9!

Sounds good. What cams are you running?

 

[LandSpeed-DSM]

Sounds good. What cams are you running?

GSC S3s!

 

[biglady112]

Chris, is your HX52 a cast wheel like you said? All eight I have had my hands on have been billet wheels. Not that it makes them anymore special. Just a different manufacturing process for durability.

 

[LandSpeed-DSM]

Chris, is your HX52 a cast wheel like you said? All eight I have had my hands on have been billet wheels. Not that it makes them anymore special. Just a different manufacturing process for durability.

This one is cast, yea. The 71mm was not.

 

[dcbaker1313]

nice to see some fast FWD hope to get mine dyno'd and tuned soon running 12.02 at 116 on my evo16g hope to have my 6262 on this week, so glad to see im not the only one who wont go to the darkside "AWD"

 

[LandSpeed-DSM]

Glad you got it on the dyno. I hope there is more in the 67mm hx52! I made 450whp @ 19lbs with the hx40. Hopefully you get more time to get the tune dialed in on the dyno next time out.

Missed this the first time around, sorry!

Drove out to Boostin Performance:

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Found my base timing (CAS) was 4-5* retarded, fixed, made a pull.. on gate pressure she made 325wtq on Boostin's Mustang Dyno, vs. 301wtq on A*spec's DynoJet. So picked up a good deal on just that alone. Still real fat AFRs ~11.2:1. Boost controller installed, thought we turned the knob all the way down and made a test pull then suddenly saw a 38psi spike and got out of it.

MBC Knob had come un-threaded some loc-tite and a few turns later we went to make another test pull, got to 20psi (only 4000rpm!) aaaaand the lower rad hose decided it wanted a day off. So we got some new -16 hose in the mail and we'll try again this week.

Uploading videos of both (partial) pulls later tonight! You could feel the pressure change in the room on the brief 38psi spike Spool is just unreal for a snail this size, now that the MBC is keeping the gates from cracking prematurely. Devin was pleasantly surprised by that too, compared to having previously had a T3 6766 on the Red Demon

Did a little math with yesterday's new 15-16psi numbers. Though they mean nothing without ET/Trap MPH.. Conveniently, her first run off the wastegates had a ~7000RPM shutdown making these figures easily compared to what it made at the same engine speed on the DynoJet.

So on the DJ 224(?):
409whp/301wtq @ 7100

Today on the Mustang 500-AWD:
439whp/325wtq @ 7100

Using 9-11% to convert to DJ numbers gives about 485whp/357wtq! Not bad for ~15psi, fatty AFRs, conservative spark and only 7k rpm We will lean on it harder once the hose is fixed!

We had discussed running out to somewhere in the neighborhood of 8500-9000, leaner and at least 5psi more boost. Depending on torque, we may add timing and see what happens. Not sure if making much more than 400wtq on Boostin's dyno is wise with that much rpm on this "stock-ish" block. Probably pushing my luck.

Can't wait to have a rotating assembly that can handle that 40psi from a turbo like this, more than once or twice that is

Click to open videos.

20psi Test:

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38psi spike:

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[richard33]

I didnt know you had a stock block in that thing! That really limits the setup for sure what a bummer

 

[LandSpeed-DSM]

This motor was built in the garage and has outlived two chassis, three gearboxes, several heads.. had nearly two dozen combinations of intake/cams/exhaust/turbos strapped to it in that time

It survived a T4 GT4088 at ~30psi, and most recently my T4 S200sx-59 on kill mode at 37-38psi. This setup will probably be the straw that breaks it's back.

As far as everyone's concerned.. it's given me my money's worth!

Just as well though that we can't just up the boost. There's a lot of development and testing needed, both chassis and driver. More power may mask shortcomings on my part.

Soon as the other shortblock is done, we'll crank it up!

 

[Pipnorcali]

You should make a table outta the old motor ..haha

Can't wait to see it all done nice work

 

[LandSpeed-DSM]

You should make a table outta the old motor ..haha

Can't wait to see it all done nice work

Thanks!

I'm curious to see where we decide to end up stopping for the year. Even limiting it to 400wtq (on the MD) at high enough rpm will make a ton of power.

For example..

400wtq @ 7500rpm = ~570whp

400wtq @ 8000rpm = ~610whp

 

[shortydtp]

I was trying to get the car tuned for IFO vegas But we ran into some issues. but hopefully we will be doing some off season testing this weekend.

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[LandSpeed-DSM]

I was trying to get the car tuned for IFO vegas But we ran into some issues. but hopefully we will be doing some off season testing this weekend.

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You guys keep showing up with these masterpieces and reminding me how much exterior work there is left to do on my pig

 

[shortydtp]

now if only we can get it to the track and make some passes, would be awesome!

 

[keltalon]

now if only we can get it to the track and make some passes, would be awesome!

Landspeed you know we have mad respect for your setup but I must say shorty got a point! Are you like me I want to go back to the dyno because I know l can make 700 but I don't want to risk breaking something to do it? quite playing and turn that boost up and let that car roar!

 

[LandSpeed-DSM]

Well it snowed today and all the tracks up here shutdown till spring, so after we finish up this week shes going into hibernation

 

[Dsmkauai]

Lol don't worry its beautiful weather here and our tracks closed too! they are supposed to be repaving it but its taken them a year already and it's not even close to being done ! Kinda like my car haha