Intake heat shield installed - impressions

[TooBlue]

Wouldn't a smaller 90* fitting (reduced from the 1" drain box hole) coming out of the air box worK? Water would drain but the hot air would stay out..?

Those parts are available at any auto parts or hardware store.

[SSGNRDZ_28]

I wanted to tabulate the readings I've been able to take so far. All of these attempt to be as scientific as possible, even down to the same stretch of road for running and same parking spot / direction for idling. There are a lot of moving variables when measuring IAT!

Sheild Results Idle vs 40 mph.jpg

[FrgMstr]

If that does not sell everyone that races reasons to grab one of these, I do not know what will.

GREAT FRIGGIN DOCUMENTAION DOUG!!

The Dynaliner is going on mine tomorrow.

I wanted to tabulate the readings I've been able to take so far. All of these attempt to be as scientific as possible, even down to the same stretch of road for running and same parking spot / direction for idling. There are a lot of moving variables when measuring IAT!

Sheild Results Idle vs 40 mph.jpg

[Steve M]

Dynaliner is on order for mine as well...should have it by Friday.

I've logged a lot of data on my car as well (not nearly as scientific though), and it does make a substantial difference. I think the Dynaliner will have a large impact on keeping the thorough heat soaking due to the radiator fans blasting the airbox and heat shield to a minimum, as shown by your results. Once those fans start going, it is game over for your IATs.

[SSGNRDZ_28]

Once those fans start going, it is game over for your IATs.

Yes this is true. Many of these idle results included "fan blasts" which caused a quick increase in IAT. The dynaliner definitely helped in this regard, slowing the IAT rise to a creep during the fan blasts in my observations. Interestingly, two layers of Dynaliner on the bottom of the shield yieled no improvement over a single layer. For instructions on my Dynaliner process, see the updated file below:


http://dougshelbyengineering.com/upl...hield_Rev2.pdf


By the way, the next batch of heat shields will be taken to be ceramic coated on Friday.

[TooBlue]

Thanks for all the research Doug...!

[98intrigue]

Great research, Doug! I'm purchasing some Dynaliner now. I need all I can get here in FL.

[Rapidrezults]

Doug, you are awesome! Thank you for your research.

Dynaliner on order!

[ViperGeorge]

I plugged mine with a simple rubber cap, something you would find on a fuel fitting nipple to protect the threads. Fit perfectly, I had one laying around that was the same size. Looked like one of these.

Did you put a hole in it to allow water to drain?

[ViperGeorge]

I insulated the bottom of my heat shield in my 15 TA with some reflective insulation I had. It could have been the Dynaliner but I don't remember. It was from Summit. I also installed the nipple thing. Either way, it dramatically improved IATs. I was consistently running 9-11 degrees above ambient even when beating the hell out of the car on the track yesterday. Now coolant temps, they were a different story. They were running 240+. Not good but despite the high coolant temps the IATs stayed low.

[SSGNRDZ_28]

I insulated the bottom of my heat shield in my 15 TA with some reflective insulation I had. It could have been the Dynaliner but I don't remember. It was from Summit. I also installed the nipple thing. Either way, it dramatically improved IATs. I was consistently running 9-11 degrees above ambient even when beating the hell out of the car on the track yesterday. Now coolant temps, they were a different story. They were running 240+. Not good but despite the high coolant temps the IATs stayed low.

Thanks for the update, sounds like a good result.

I just received the sample alternative drain plugs and think they will work well. They can be cut open or left closed depending on what the user wants. Will post photos soon. I think they are only available in bulk but will probably include them in future shield orders and ship them out with the Gen V thumb screws if desired.

[KB Viper]

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Thanks for the update, sounds like a good result.

I just received the sample alternative drain plugs and think they will work well. They can be cut open or left closed depending on what the user wants. Will post photos soon. I think they are only available in bulk but will probably include them in future shield orders and ship them out with the Gen V thumb screws if desired.

Count me in

[SSGNRDZ_28]

Photos of the alternative plug solution... to be included in new heat shield orders and upcoming shipment of Gen V thumb screws.

IMG_6809.jpgIMG_6810.jpg

And updated instructions (page 5)

http://dougshelbyengineering.com/upl...hield_Rev3.pdf

[Steve M]

Looks like the perfect solution. Great find!

[danny1305]

Thanks! Very helpful as I was having a lot of trouble finding any

[mjorgensen]

Just installed one of Doug's shields this morning, very nice piece of engineering Doug, fit and finish were top notch, I wont have any reservations offering these to my clients.

[Nambo]

Just installed one of Doug's shields this morning, very nice piece of engineering Doug, fit and finish were top notch, I wont have any reservations offering these to my clients.

I've got one sitting in the box Mark just waiting on the ACR. One less item for you to take off the TA!

[Steve M]

Just installed one of Doug's shields this morning, very nice piece of engineering Doug, fit and finish were top notch, I wont have any reservations offering these to my clients.

Agreed...for something seemingly so simple, it is actually a very complex piece that is well made.

[BJG32]

I am confused about ordering. Does the $425 kit have everything I need to install or do I need to add the drain plug, and bolts etc?

[SSGNRDZ_28]

I am confused about ordering. Does the $425 kit have everything I need to install or do I need to add the drain plug, and bolts etc?

It has all you need. Those are just spare parts. Thanks!

[SSGNRDZ_28]

Just installed one of Doug's shields this morning, very nice piece of engineering Doug, fit and finish were top notch, I wont have any reservations offering these to my clients.

Agreed...for something seemingly so simple, it is actually a very complex piece that is well made.

I installed my box this past weekend. I have to say, it was one of the nicest custom fabricated parts I've seen, very good attention to detail, and the fitment was excellent.

I wrapped the inside surfaces with the 1/8" Dynaliner, and then added an extra layer on the bottom surface that faces the radiator. I also installed the rubber plug on the bottom of the airbox.

Prior to installing the box, my IAT's typically read 15-20F higher than ambient.

After the box:

80F ambient, cruising IAT's read between 9-11F higher than ambient.
90F ambient, cruising IAT's read between 9-11F higher than ambient.

Looks like it is working well!

Thanks for the kind words everyone, that's the goal with every one of my products.

[LmeaViper]

Photos of the alternative plug solution... to be included in new heat shield orders and upcoming shipment of Gen V thumb screws.

IMG_6809.jpgIMG_6810.jpg

And updated instructions (page 5)

http://dougshelbyengineering.com/upl...hield_Rev3.pdf

Awesome.

[DPViper]

I have really enjoyed reading about the analysis of the IATs how SSGNRDZ developed the heat shield. Fascinating stuff. Basic questions....how much actual horsepower am I losing when timing is pulled and if I don't go to the drag strip or spends lots of time idling in traffic....would I really notice a big difference in performance? Thanks

[Steve M]

I have really enjoyed reading about the analysis of the IATs how SSGNRDZ developed the heat shield. Fascinating stuff. Basic questions....how much actual horsepower am I losing when timing is pulled and if I don't go to the drag strip or spends lots of time idling in traffic....would I really notice a big difference in performance? Thanks

The first time I noticed an issue was a couple years ago before I even had a remote understanding of how the Viper PCM works. I was sitting at a traffic light on a hot summer day waiting to be able to turn to get on the interstate...when I went to give it hell on the on-ramp in 2nd gear, the car basically fell on its face and felt like I was dragging a boat anchor behind me. If I had to guess, I was down at least 50HP for it to be that noticeable...fast forward another year when I got my hands on HPTuners, and I figured out that given the conditions, the PCM was likely pulling anywhere between 8-12 degrees of timing due to high IATs. At peak torque (between 4,800-5,000 RPMs), the Gen 4 and Gen 5 calibrations call for about 18° of timing, so with the IAT modifier pulling 8°-12° of that out, you are looking commanding between 8°-10° of timing at that point, and that's really low. An otherwise stock Gen 4/5 car can handle anywhere from 22°-24° of timing at peak torque...that's actually where most of your power gains come from with a tune. Additionally, if the PCM pulls timing, it also adds fuel as an extra safety measure, so not only will you be running very low timing values, you'll also be running rich.

Let the car sit for a few minutes (at least until the radiator fans kick on) and let everything get hot, and then try doing a good 2nd gear pull right after that (now is a great time of year to try this). I'm guessing you'll notice a difference in how hard it pulls when the car is hot.

[DZnutz]

Arent any of you concerned with the engine hydrolocking if you completely blockoff the drain nipple?

why not just extend it with silicone tubing and route to the bottom of the engine bay?