Quote:
Originally Posted by mike@x-ph.com
I agree with you about the MAD 5" is for a stage 1, but your numbers are off. during all 4 runs, IAT went up 15 degrees, not 20. Considering stock rises by 40 degrees, that's a big improvement.
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True - I'm basing this on the exact quote of the poster of those logs. Increases were 15-18F during 1 3rd gear run, and it took over 1 minute (80secods) to reach back to it's starting temps.
This is a direct result of the intercooler's ability to cool itself.
Quote:
Originally Posted by mike@x-ph.com
OP said he might go to stage 2, currently, he is on a stage 1. A 5" intercooler like the MAD is the best option for him right now.
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I disagree - there is no determent for going with a reasonably larger intercooler that offers more headroom. You sell a few different options.
Quote:
Originally Posted by mike@x-ph.com
If he goes to stage 2, a larger intercooler will provide better results.
i do not see a benefit in advising him to get a larger than 5" intercooler as it will add a lot of weight, cause a much a slower recovery, and turbo lag.
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Sorry Mike, I respectfully disagree. You keep saying this and it's not based in any fact.
Quote:
Originally Posted by LYTSOUT
Performance: Perfect. Zero increased turbo lag. Interestingly, even before flashing to Stage 2, my butt dyno suggested more throttle response and top end. But the logs told a much more quantitative and reassuring story. For sake of simplicity, I'll distill the logs down to just the IATs in pulls from 2k in 3rd through redline in 4th...
Ambient Temp - Hardware - Tune - IAT 2k in 3rd - IAT top of 3rd - IAT top of 4th - (IAT delta from bottom of 3rd to top of 4th)
72F - Stock - OEM - 90F - 112F - 117F (+27F)
https://www.bootmod3.net/log?id=5ed4...729b6c7129048e
72F - Stock - Stage 1 - 86F - 129F - 140F (+54F)
https://www.bootmod3.net/log?id=5ed3...90c66237c1d0f8
82F - VRSF 6.5" - OEM - 104F - 95F - 100F (-4F)
https://www.bootmod3.net/log?id=5eda...729b0f7178b9f1
82F - VRSF 6.5" - Stage 1 - 101F - 97F - 109F (+8F)
https://www.bootmod3.net/log?id=5eda...90c634ff221de4
79F - VRSF 6.5" - Stage 2 - 92F - 92F (0F) ...*there was too much traffic to get into fourth gear so a third gear pull was the best I could do*
https://www.bootmod3.net/log?id=5f4f...90c61f061ddbc8
I'm no expert at reading datalogs, but to me, those results are extremely impressive. Generally-speaking, they tell me two things:
1) The OEM intercooler is actually underpowered for even an OEM tune, let alone Stage 1.
2) The VRSF 6.5" is just about perfect for a Stage 1 or Stage 2 application. In a third gear pull, the IATs actually drop in the OEM and Stage 1 tunes and remain rock steady in Stage 2.
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No lag, excellent resistance to heat soak, no proof that the smaller cooler cools down quicker either.