Built Engine Plans
- Thread starter andy-stevenson
- Start date
OP I have just completed this my motor build which cost a total of 9k including fuel fuelers, and injectors. The motor work was 7500. Which is Carrillo rods, fingers pistons 16.5.1, bored .20, internally balanced, main studs, arp fly wheel bolts, ATI dampner, and full overhaul kit with head Gaskets. Running 80 oner injectors and a DP 72mm.
I 100% disagree with your opinion. I would think someone when is so good at tuning a big single could get a stock/475 arrangement working properly. My truck is 100% unlike anything you described.
OP good luck on the engine build. I am thinking about a similar setup internal wise
like I said up top ive driven a few setups like that but I always felt it was breathing threw a straw but that's my opinion but im not saying that compounds r bad but i am saying that there r better options for a street truck
Yes tore everything down, pulled crank and rods/pistons out. Machine shop out the new pistons and rods in for me. 300 bucks.
IMO the best thing for a built street truck would be Marks 72mm as a single or twin it. You can't beat a VGT turbo spool up. Many may say different but most have only ridden in one of the setups. I've ridden and drove both a twinned built truck that went from s366 with s475 to a Danville 72mm with a 483 and it was a completely different truck.
the dp 72 is the best bang for the buck hands down because its a drop in as far as i know and throwing a bigger charger with it would deff be fun but that being said i love my 475tct and it is so nasty but i have the best in the bis when it come to big singles tune my truck from the seat
I have driven S475 over stock with tuning from other tuners as well, such as Rob - who is one of the best at tuning that setup. I still say they spool worse than a stock charger by itself with race tuning. Up until the big charger starts to push air to the stock charger the 7mm exducer tip height on the S475 is the space the stock charger has to breathe through. I don't care what you do with vanes, timing, fueling, etc - you can't change the fact that a 7mm gap is not big enough for a stock charger to pull air through. On the top end a stock charger can't flow enough air for itself and will have drive pressure start to rise rapidly at 3700 RPM no matter what you do with the vanes, now start trying to get the exhaust air from an S475 out of it and what will happen? It's not tuning magic or rocket science, it's simple math and physics.
I drive and tune these trucks for a living (as in 10+ hours a day, 5 days a week and for fun on weekends) and have driven and tuned more setups than I can even remember - and S475 over stock is probably my least favorite; followed by an A3K (S259) that is smaller than the stock turbo the guy replaced and won't do any more power, but at least it spooled as good as stock.
My truck lights just as fast as stock and has a s475/stocker. Our ranch has 18 dmaxs so I know how a stock one spools like. I love my twin kit. Deff the best option for stock motor guys IMO.. lower gets, boost to drive psi is 1:1 and spools like stock. Glad a went with this kit as I've been running it for 3 seasons now running 50+ passes under 12.6 and my lly is still on stock head bolts. Thanks to low gets and drive pressure with 600+ the motor still living and expect it to live for another 3 more seasons if I don't add a 2nd cp3 lol
So at WOT above 3700 RPM your boost and drive pressure stay 1:1? When I am comparing spool up I am comparing a max effort tuned stock turbo LLY/LBZ/LMM to the same truck with an S475 over stock on it. I have had customers buy the S475/stock kit, get it dialed in by me, have a few others try to tune it any better, then sell the kit because they didn't get what they thought they should.
And no offense but in 2008 we had an LBZ running consistent 12.4s with a lift pump, exhaust, shimmed FPRV, sleeves, spring clamps, and trans - stock intake, downpipe and all. We have had LLYs with stock turbo, stock CP3, and stock injectors in the 12.3s. Sorry, and again I'm not trying to offend you or your truck so please don't take it personally; but I'm just not that impressed by a truck with an expensive compound setup running times that it could run without it. And I have guys with higher hp on stock head bolts without issues - unless you neglect to fix coolant leaks you will bend your rods before you ever blow your gaskets.
I hated my stock/s475 twin kit the only good thing about it was the sound, I will be going with a single s475 over winter
No offense taken Dustin my truck doesn't shift above 3700rpm so I don't know what Itd actually be but I do know it stays pretty much 1:1 up till 3450. I know stock turbo trucks run faster then me I know, I've only ran at tracks that are above 4600ft and 5500da so that really hurts my ET. I realize you can bend a rod before you lift a head it happens all the time right?? I'm just saying if it wasn't for my twin kit and cool egts at this power i may have popped a gasket or bent a rod. The cool egts and lower dp has helped my gaskets live. Where does towing come into your thoughts dustin? I'm not trying to pick on you I just wanna hear your thoughts about.. say a s475/stock kit vs a single s475 .90ar. Only reason I went with my kit is I tow a lot with my truck. I race it when I can but when I do I like the feeling that it can drive like stock, run mid 12s with ease, best of all hook up a gooseneck and tow 12k back home without worrying about egts and smoking everyone out trying to light a larger turbo. I know what I was getting when I ordered my kit from Scott and I've never looked back. But what would I know I do not tune trucks for a living nor own a shop. Just my opinion from my past experiences with the 475/stock kits and riding in big single truck nether the less towing with them.
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475/stock is probably the best set up ive driven for everyday drive (towing, overall power, spool up, etc) and ive driven quite a few set ups, from big (gt5541/GTX4202) to small (danville 2.5 and stock)
I just drove a truck with a s480 over a batmowheel lbz that one of my marines just got and im not one bit impressed and it was a wcfab and tuned by rob and I kno rob can tune so it was not bad tuning it just wasn't impressive compared to my single s475 around town it just didn't jump up and rip like the stock charger and when we got on the bypass it didn't seen to want to light the big charger it as where my stock turbo wold light and rip at any time and my 475 is only a hair slower around town and on the freeway thanks a lot to so bad ass diesel addiction (ecm/tcm) tuning the boost comes on pretty quickly and if I really get on it it down shifts and takes off like a bat out of hell and hope the tires don't break loose