You are currently viewing our community as a guest, which gives you limited access to view most discussions and access our other features. By joining our Member Supported community you will have access to post topics, communicate privately with other members (PM), respond to polls, upload photos, content and access many other special features. Registration is fast, simple and absolutely free so please, join our community today!
If you have any problems with the registration process or your account login, please contact us.
Engine & DrivetrainDiscussions about the engine and drivetrain of your vehicle.
This is a discussion thread titled "** Real Story on TRD S/C!! **", within the Engine & Drivetrain forum, part of the Technical & Vehicle Assistance Forums category.
Originally posted by GeneralTJI how much room you guys got under the hood.. how about a custom Turbo or TT setup ?
hehe
I would love to do a TT setup. There is gobs of room to spare. It's quite possible to hang turbos right off the exhaust manifolds, as long as the oil return can be plumbed properly (gravity feed to the oil pan). I'd be temped do to it, but I bought this truck to have a new, always running, low maintanence vehicle. There is a obviously a lot of other stuff to do, like intercoolers, probably new fuel pressure regulator, and ECM reprogramming, but it could be done.
Anyone knoe what the compression ratio is on the V8?
Andrew, I think it's about 9.6:1...at least that's what I got from www.autosite.com.
How well do you think the iForce would work with turbo charging? It's one of the biggest (if not the biggest that I can think of) iron, DOHC, 4valve/cylinder engines out there...And from what I hear, all of these characteristics work well with turbos...
I'm excited about the V8 SC (and have been since its very first due date...years ago, I think), but with the new Dodge Ram SRT-10, the Lightning (which will probably jump in power to meet Dodge), and any possible SS Chevy might have up its sleeves, well...I think a turbo Tundra would fare quite nicely...
...Anyway, looking forward to more info about the SC...
<<You don't want a turbo for a truck, the power will come on all in the wrong places.>>
You may want to tell Cummings, Chevy, and Ford, as they have a different opinion on their diesels. I know diesels are not exactly the same, but you definitely can make a turbo V8 bring on the power in the right areas. It's all about properly sizing the turbo(s). A properly sized turbo will make usable boost at 2000 rpm and hold it till redline. And a turbo will _always_ be more efficient than any Supercharger ever made, period. I'm not saying turbos are always the way to go, as there are other things to consider, like packaging, warranty, and overall simplicity, but turbos are well proven in the trucking industry, and in my opinion the Turndra motor would be perfect for it. Toyota has always made engines that respond extremely well to turbos and hold up under the most extreme conditions.
Hiryu, 9.6:1 is about perfect for a low boost (under 9 psi) turbo setup on 93 octane pump gas. I think a pair of T25/28 turbos, or maybe a pair of Mitsu turbos (about $500-600 each) and a pair of stock Supra intercoolers (Hmm, I have a couple of those lying around...) a higher capacity MAF (my old Supra MAF, good to 500 Rwhp...), boost the base fuel pressure a bit (from 43 to 60psi... new Bosch pump and adjustable regulator...), and some ignition and fuel correction, you could have a nice turbo system.
I just saw this post on Yahoo. I called them up and they have the supercharger and the truck ready for the install. TRD is giving them classes on the install so it seems like it should be out soon. Jason (the guy I talked to) said that it should be out within the next month and TRD rated it between 100 and 130 horsepower!!! here is a link to the post I read with the phone number:
They are out St. Louis I believe. BTW: He quoted me $601 plus shipping for the TRD Dual exhaust for the Tundra. If you're by there it would be a good idea. I happened to get one for $600 plus $25 shipping so I didn't get it from them, but if your near St Louis....it would probably be the best deal you can find.
Originally posted by JAG Making a comparison between diesel engines and a gas engines using a turbo is ludicrous. Most turbos for gas engines are made for high reving engines such as the toyota supra that revs over 8000 rpms. Most all turbos made by car companies and after market for GAS engines are made for 4 & 6 cyl engines that red line much higher than the Tundra V8 engine. Turbos you find on V8s are race engines. Not one truck maker or after market company makes a turbo for a GAS V8 engine truck – why? Sure there maybe usable boost produced at 2000 rpms but not much. Try 3500 - 4500 rpms for the start of usable turbo boost. The Tundra has a 5200 red line, so you'll never get to full boost, without changing the whole valve train.
Your formula for a turbo sounds great if you were building a singing 4 or 6 banger car that I've seen beating the Vets at the track.
Good luck turning an apple into an orange.
Have you seen any of the latest cars that have turbos? The Audi turbos make max torque at 2000 rpms....
Originally posted by TurboAndrew I'll admit a lot of turbo cars make HP up high only. My Supra's turbos spool at 4000 rpm. http://home.austin.rr.com/andrewt/pipes/pipes5.jpg
Then again, they are capable of 900 rwhp....
-Andrew
Yum,HKS twin kit? I like the new merge you did for the outlets.
__________________ Try SEARCHING before posting. Thanks!
Yum,HKS twin kit? I like the new merge you did for the outlets.
Yup, thanks. The HKS intercooler pipes were not that great. My pipes larger radius bends. There are some really nasty 90 degree bends in the HKS pipes. That, and they run thorugh the inner fender, and only 2.75" diameter after they merge. Mine merge to 3" (the inlet size of the intercooler) and route directly to the intercooler.
dyam...it's even harder to compare apples to hippos, or RS-8s to farfugnugening folksvagons. s'far as i know, the sticker i saw on the back of an audi the other day said "3.0", so i'm sure they've strayed at least a little from their humble teutonic roots over the years.
btw, there's a guy at one of the local 4x4 shops here in colorado who's planning a competent tt for his 2uz-fe. somehow i doubt any 2uz-fe or comparable engine with an added s/t/c is going to be relegated to driving the kids to soccer practice, unless you got a lotta fat kids who need an engine pushing 400hp to haul them around. i'd put money on the suspicion that anyone adding s/t/c to their 2uz-fe is going to enjoy themselves by wasting ricers and frightening lightenings.
hey, that kinda rhymed. i'd say "street raced", not "street driven" is the proper description. i'm also more willing to listen to someone who (it appears) does custom work on their tt'd supra (provided more cogent theorizations on the 2uz-fe idea materialize) than any assumptions regarding airborne artiodactyls.
so tell me, why do gasoline engines with turbos only theoretically work at high rpms, and why can they not be adjusted to work at lower rpms? ignore diesel, we can't get diesel tundras in america.
-sean
Quote:
Originally posted by JAG
Right – and can hippo's fly!
Any of those CARs you are talking about have street driven V8's in them?
As for Audi a car – they are still playing with a little 30 year old 2.8 V6 that can't seem to stay out of the repair shop and never could.
JAG: DeepStealth made a very good point for me--I'd probably prefer an SC for towing/hauling, but for a sports truck, I think a turbo would work rather well...(besides, all I have to carry around are my bands' equipment and my drum set)...and I don't expect TRD to come out with a turbo setup, either; like you know, they're having enough problems with the SC.
As far as the high-revving cars with turbos, I understand that, but they also have smaller engines (usually from 1.8L to 3.0L; I feel real boost in our little 2.0L WRX engine by 2.5-3k rpms). I think that the Tundra's larger 4.7L should be able to spool up small and maybe even medium turbos much faster, so I assume a high redline wouldn't be as important...but I'm just assuming this; I'm sure TurboAndrew could give us a better answer.
By the way—TurboAndrew—how much torque (and hp) do you estimate that turbo setup you mentioned might produce? It sounds very interesting…
Re: Apples to Oranges
