General Supercharger Thread.

Good to know. I might try that

 

Totally agree with that.

 

The soot on the tailpipes after pulling the camper around for 300 miles has me praying for those cats! Ran great on the highway though in S5, TC locked at 65mph. Left the new Silverado behind me pulling a TT half the size for dead on the hills and didn’t even unlock the TC lol. It really holds speed and gear like a honey badger. Got 9mpg out and 7.5 coming back. Im a broken record I know, but I love this thing more every time I hook the trailer up.

 

I averaged 11 city & 14 highway on the 700 mile round trip to L.A. Friday to Sunday.

After the pump repair fuel pressure was up from 44 at idle (tune set) to 50. I set it back to 44 when I got home yesterday.

 

Thinking of trying that TB coolant bypass to see if it actually does anything. Since I pretty much have my intake temps figured out consistently post SC intercooler I should be able to get a definitive answer on if it actually does a damn thing or not. If it does, I’d probably plumb in a bypass to open for summer and close for winter like previously discussed. Doesn’t seem like anyone has ever actually measured temps before and after the TB to see if the bypass mod does anything. I’m a little skeptical due to the relatively small area of the TB and the speed and volume of the air passing through it.

 

It's super easy, I ran a single hose between the two points the TB was connecting to. I mean, it's never under 50 here in the depths of "winter" It's been "mild" so far not over 105 yet & still getting down to the 70s at night. (usually by now, never under 90 & as much as 120.

 

I was thinking of this but like you said Im skeptical for the same reasons.

 

I’ve done the bypass since 2017 on Tundras in below freezing without any issues. If you lived in the midwest or interior of Alaska I would switch it back in the winter, otherwise the engine heats up everything just fine. If you run your truck, hop out and touch the throttle body it’s likely 200f as-is.

 

Do it, the more scientific answers we have the better, since 99% of modifying things is assumptions.

 

To me it’s less about the power and more about reducing cylinder temps with cooler IATs for longevity’s sake.

 

i did it by not following instructions closely enough during the install. Just left it that way. Of course, no idea if it made any difference

 

Oh and I would recommend using a little compressed air to blow the metal coolant line out as some will get stuck in there and make a mess later. Some people cap them too but seems redundant to me, unless you’re doing a summer/winter switch over setup. The process is so fast though doesn’t seem worth the trouble (just do it manually twice a year).

 

gonna get her dyno tuned tomorrow

 

Sounds awesome. Interested to hear if the stock size intake is a problem/restriction when dyno tuning. I’m sure it would be a little more power on at least the Maggie intake box.

 

ditto

I’ll start the bidding

480whp
520tq

 

very curious as well. if i can make more power il definitely get a bigger intake.

sounds about right. il bet on that haha. if i can make at least 500 im happy

 

What are your accompanying mods with the Harrop?

 

Pops rig update. Maggy box on and smaller blower pulley in. Waiting on tuning session appointment.

 

Whipple dimensions look weird. Fat snout, skinny body, fat base

 

Ya, that Whipple looks lean.

 

Twinscrew less width needed.

 

(Sorry random question). I thought I saw a post where someone put the (3.85”) maggie intake onto the Rcf throttle body without any modifications. I just got mine in the mail and the intake rubber will not go on the rcf throttle body easily (as expected its .3” wider). I was thinking to put it in boiling water and work it over the rcf, but was curious if other people had attempted this same situation and had any advice. I could also see someone just cut the very end and use an adapter but won’t look as finished.

 

650cc injectors, upgraded fuel pump, csf radiator, and dual catch can

 

Snout is 102mm is why

 

@e30cabrio how did you like Xact as tuners? I may send pops over there since they have the dyne etc

 

Tim the owner is great, he knows his stuff. How else could I get 574tq/537hp?

 

Sweet! Left them a message

 

Well gents, it’s early yet but my initial impression after doing the TB coolant bypass is it does in fact do SOMETHING. My typical IAT before this mod once the truck was up to temp and cruising was about 37 degrees above ambient. After this mod and some initial testing with 15 minutes of driving and 5 minutes idling in between is that it has decreased that delta.

It was 79-81 out today depending on when I looked at the OA temp on the truck. On the initial drive before it got super hot I was seeing a 15-19 degree delta at 96-100 degree IAT. I then parked it in the garage and let it idle and got the IAT up to 120ish to try and heat soak it a bit. I then took it back down the road again cruising at 60 (in and out of the throttle due to hills) and it was pretty much hanging out at 105 while slightly on the throttle and cruising at 60ish. That’s a 25ish degree delta. The temp would drop cooler when on the gas vs coasting as it pulled more cool outside air in and across the HX and sensor. Some pics are included.

I’ll keep you all updated as I drive it more, but it appears right now it’s good for at least a 10 degree drop in IAT. I also pinned the transmission thermostat open to test that as well, and under my testing which included some aggressive acceleration the hottest I saw was 176ish at the pan at the end of the drive. I’ll be monitoring that as well.

 

I left My transmission thermostat pinned open when I retrofitted the oem cooler.

 

Thanks for the findings, doctor! Next mod on the list.