SRL VS SPD - Ford Powerstroke Diesel Forum
6.0L Performance Parts Discussion What has or has not worked for you?

View Poll Results: SRL VS SPD
SRL Extreme 9 52.94%
SPD 8 47.06%
Voters: 17. You may not vote on this poll

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post #1 of 35 Old 01-07-2014, 07:38 PM Thread Starter
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SRL VS SPD

Ok it appears I'm going to have to pay $75 to get my SPD revised for the new Stage 2 turbo or pay $100 to get the SRL Extreme. I've never ran any Gearhead tunes but my truck does seem to really like TSD's tunes. I need opinions on which way to go. Which one can tune this turbo better? I assume it's going to have to be tuned like a Powermax.



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post #2 of 35 Old 01-07-2014, 08:11 PM
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Quote:
Originally Posted by Dirty_Stroke View Post
Ok it appears I'm going to have to pay $75 to get my SPD revised for the new Stage 2 turbo or pay $100 to get the SRL Extreme. I've never ran any Gearhead tunes but my truck does seem to really like TSD's tunes. I need opinions on which way to go. Which one can tune this turbo better? I assume it's going to have to be tuned like a Powermax.
Matt's SRL XX, ++, or Extreme is pretty quick, but I also watched my fuel needle go down while I was driving.

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post #3 of 35 Old 01-07-2014, 10:06 PM
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I say srl seems to be the best for my truck

2006 ford f350 xlt cclb
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post #4 of 35 Old 01-08-2014, 01:30 AM
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SPD all the way. The SRLxx runs great up top but is a dog down low with my MTW stage 2. I was about to give up on this turbo cause spool up was slow (IMO) I had tried SRL, SRL+, SRLxx, Tonys Wildmans Extreme along with many tweaks from both tune writers, and finally I tried Chris's SPD and it DOES spool faster than stock! Some guys say the SPD is not as powerful up top (high rpms) but I can't feel a difference and honestly I don't spend that much time about 3k rpms compared to the time I spend from idle up to 3k. It should also be noted that I got tune revisions from Matt and Tony but Chris was the only tune writer I've ever had where I didn't need a tweak for anything motor related. Chris did give me a tweak but it is because I like in the mountains and I raised the 6th gear shift point up to 55mph to keep the motor from lugging. One last thing... I have NEVER got over 250-270 per tank until I got the SPD tune and now I'm getting just over 300 every tank. Of course this is strictly in town driving and. I always allow the motor to run 10 min before I drive. Let's us know what you choose!

Edit: My MTW stage 2 does have a larger a/r housing so my spool will be slower than yours but that only means even faster spool up with any tune compared to the old MTW stage 2 turbo.

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post #5 of 35 Old 01-08-2014, 06:08 AM
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I've tried just about every tuner out there and hands down for the street, I'd run either TSD's SPD or Eric's XtremeX. I liked Eric's XtremeX because my VGT turbo ran at a lower EBP to boost ratio under normal cruising around than my SPD tune did but the SPD tune was better IMO than any of my SRL tunes from Matt. I know Matt writes A LOT of tunes that guys like but they didn't work for me. I absolutely love how Chris tunes the transmission. Eric also does a great job but has a little firmer shifts.

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post #6 of 35 Old 01-08-2014, 06:18 AM
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I had a similar experience to Rollinearly, I really enjoyed my Gearhead tunes until I upgraded the turbo. The turbo spool was really and the only tuner that could get it to spool quickly was TSD.



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If you think your truck might let you down…………..it WILL.
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post #7 of 35 Old 01-08-2014, 06:27 AM
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I'm getting interested in the SPD now...

Denis "Lt. Sled"
2006 F-350 Crew Cab Long Bed Dark Shadow Gray

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post #8 of 35 Old 01-08-2014, 06:32 AM Thread Starter
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Thanks for the replies guys. I'm leaning toward just paying to have a new SPD written since my other SPD ran awesome on my truck and I like the quick spool up.



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post #9 of 35 Old 01-08-2014, 08:47 AM
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"windrunner " could you elaborate more on the ebp/boost ratio #s . What's good/bad in
your mind ? What to look for in a combination ?
Trying to learn here - Thanks
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post #10 of 35 Old 01-08-2014, 08:56 AM
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I love the SPD. I have run it, as well as the Looney and Looney Wild, and I love the way it pulls of the line as well as the torque it has during daily driving.

It seems that mpg's are higher with the Looney, but I prefer the SPD for daily driving. Even pretty much bone stock and with larger tires and a small lift, it really moves off the line. I love the way it drives.

I did a CTS 0-60, and it came out at a 6.1 seconds with lots of gas on board (I usually keep at least 30 gallons on my auxiliary fuel tank in the bed) and a heavy tool box in the bed. Factoring in the larger tires and the weight, it would be under 6 seconds with less fuel and without the tool box.

It's no drag strip demon, but it pulls well for the size and weight of the truck and without any other real horsepower mods.



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