317 head 5.3 turbo question
12-24-2010, 04:37 PM
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317 head 5.3 turbo question i have a 5.3 with the zo6 cam, 317 heads, vic jr intake with a elbow, 80# injectors running off of e85. I am debating between the s400 83mm 1.10 ar VS the one thats 96mm 1.32 ar. this is a track car only and am running a 2 step. will the 96mm just be to much for it? i ask because they are the same price. thanks
12-24-2010, 05:25 PM
#2
Honestly this combo sounds pretty mismatched to me. Low compression, somewhere in the 8's correct, victor jr intake (high rpm) and a ls6 cam? If you plan on spinning some high rpm with a good amount of boost you will need a different cam. Those injectors look to be a bit small for e85 and you could use more compression (243 heads). What size stall are you planning on running?
12-24-2010, 07:04 PM
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Would I be better off with a ls6 intake? And I didn't tune it yet, I'm going to try and see what e85 does and keep a close eye on my a/f ratio. If not ill be running c16. And I will be pushing 20lbs of boost. I didn't get a converer yet, I plan on getting one built by FTI, I'm thinking 3500 but ill let them decide once I get my engine and turbo set up finalized
12-24-2010, 10:43 PM
#4
Is this a built engine or a stocker? What are your goals? The LS6 intake will match the rpm range of the LS6 cam much better than the Victor jr. Unless you plan on spinning past 7000 rpm you will not see any gains from the victor jr without a cam swap. The 83mm turbine will probably choke on a 5.3 with 20lbs of boost, you'd be better off with the 92 or 96mm turbine. The big turbines are not going to spool nearly as quick but since this is a track only car a t-brake and a properly matched stall will solve those issues. The T6 version with the 1.32 a/r will make quite a bit more power than the 83mm setup.
12-25-2010, 12:03 AM
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its a stock bottom end with arp rod bolts..this is my first boosted set up so im going to keep throwing power at the 5.3 and learning with it until it blows up or pushes water, whatever happens first. lol in the mean time im building a 370ci. thats why i wanted the vic jr, so i wouldnt need to buy 2 different intakes, but now that i have both, i can do some side by side testing between the two and give all of you some numbers with the ls6 vs vic jr.
i think i will go with the 96mm, and when i run the 10.5 class here i can always just throw a 88mm restrictor in it. thanks for the help.
another question i did have was about the fuel system. this engine is going in a g body car, and do i need to have a return line? if so anyone have a diagram of the fuel system?
i think i will go with the 96mm, and when i run the 10.5 class here i can always just throw a 88mm restrictor in it. thanks for the help.
another question i did have was about the fuel system. this engine is going in a g body car, and do i need to have a return line? if so anyone have a diagram of the fuel system?
12-25-2010, 12:13 AM
#6
this manual has a good fuel sys diagram.
http://static.summitracing.com/globa.../aei-11101.pdf
btw e85 is the shiznit. im running a 5.3 and two t70 turbos(a lot of turbo for a 5.3). i hit my wastegate setting of 8.7 psi at only 4400rpms in third gear. and i attribute that to the e85
http://static.summitracing.com/globa.../aei-11101.pdf
btw e85 is the shiznit. im running a 5.3 and two t70 turbos(a lot of turbo for a 5.3). i hit my wastegate setting of 8.7 psi at only 4400rpms in third gear. and i attribute that to the e85
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12-25-2010, 07:28 AM
#9
its a stock bottom end with arp rod bolts..this is my first boosted set up so im going to keep throwing power at the 5.3 and learning with it until it blows up or pushes water, whatever happens first. lol in the mean time im building a 370ci. thats why i wanted the vic jr, so i wouldnt need to buy 2 different intakes, but now that i have both, i can do some side by side testing between the two and give all of you some numbers with the ls6 vs vic jr.
i think i will go with the 96mm, and when i run the 10.5 class here i can always just throw a 88mm restrictor in it. thanks for the help. another question i did have was about the fuel system. this engine is going in a g body car, and do i need to have a return line? if so anyone have a diagram of the fuel system?
i think i will go with the 96mm, and when i run the 10.5 class here i can always just throw a 88mm restrictor in it. thanks for the help. another question i did have was about the fuel system. this engine is going in a g body car, and do i need to have a return line? if so anyone have a diagram of the fuel system?
If you truely are looking for an 88mm compressor side turbo on a budget look into the budget Garrett units from Forcedinductions. They offer a GT-88 or GT-91 with a 94mm turbine wheel that will absolutely rip (rated to 1400-1475 hp) for around $1,300.
12-27-2010, 12:58 AM
#10
That budget turbo GT88 also weighs 48lbs of note and is as large as a human head. I bought one and it was massive... and sold it to buy a Comp Turbo CT80 (T4 1.15 A/R with 1150hp rating) aluminum center section, triple BallBearing, water/oil cooled and only 21lbs with a standard turbine housing. It was more costly but also not old school technology. With a Tial or similar s/s housing it would dip down to around 16-18lbs and spool waaaay faster. Physically it is much smalller as well.
Your compression as noted with the 317's will be super low. A lightweight car on here went 8's with a stock 5.3 turbo engine (same heads), upgraded cam, head studs, GM MLS gaskets, and single turbo.
Your compression as noted with the 317's will be super low. A lightweight car on here went 8's with a stock 5.3 turbo engine (same heads), upgraded cam, head studs, GM MLS gaskets, and single turbo.
