5.3 tt build questions
5.3 iron block
K1 crank http://m.summitracing.com/parts/kot-012fae36258?seid=srese1&gclid=CO6qp5yn-bsCFUjNOgodaUQAWw
K1 rods going with 6.098". http://raybarton.com/parts/index.php/wiseco-k1-chevy-ls-h-beam-rods
Wiseco pistons. http://www.excessiveracing.com/wisecok474m96-ls-seriesvortec53lforgedpistons-22ccflattop3780bore3622stroke927x2250pin.aspx
317 heads. Haven't decided if I want to get used heads or http://texas-speed.com/p-1178-prc-stage-3-60l-cnc-ported-heads.aspx
102mm intake. http://www.asaperformance.net/servlet/the-9992/Fast-102mm-Lsxr-Ls1/Detail
102mm throttle body. http://www.frsport.com/Big-Mouth-102mm-Throttle-Body-w--TPS---IAC-Sensors---FAST-LS-Manifolds_p_221171.html?gclid=CPSrucLN-rsCFU_NOgodWiEAWQ
Going with a custom cam.
Plan on running twin on2 76mm turbos. 44mm trial wastegates. 50mm bov. Air to air intercooler.
Been tring to figure out what fuel rail/injector combo to go with. Any suggestions?
Just curious if I'm on the right path with this build. Open to any comments and criticism.
Thanks. Chad
Edit: plan on starting off with 10psi. But you all know that won't last long so it will be turned up
Dead set on going twins?
Do you plan on making over 1000whp?
Do you realize the crank you posted is a 58x wheel?
Last edited by HexenLord; Jan 15, 2014 at 10:34 PM.
Can't seem.to find a lot on forged 5.3. Most ppl get a jy motor and change top end (cam intake maybe heads).and run the **** out of them. But I was thinking 9:1 compression. That was my next question. What size cc chambers on the 317s would get me there. Or would a different head get me.there without milling. Alsoi would like a couple suggestions on rockers.
Sorry if I'm asking a lot. Just trying to get this plan mapped out before this tax money gets here $$$$$
My first vehicle was a 1990 s10 blazer 2dr. No motor or trans. I was 15 and in school but instead of going to school I skipped and built my truck. Wasn't nothing to brag about. Just a old school 4.3 with vortec heads and a 700r. But to me it was alsome. After that I meesed with the ford 5.0s and hated them. Then went into imports. Had a 1991 honda accord 2.2 5spd. Blew the motor and ended up swappin in the h22. But I got tired of being fwd and slow as ****. So I'm back to chevy.
I never intended on building a 5.3 til a month ago when my buddy told me he had one forsale for 75$ no heads intake or wire harness. I ended uphepling him pull a trans for his dodge at jy and he gave it to me. I've been doing as much research as possible. Everything from forged internails to intake to lifter trays to front accessory.
My orignal question was fuel. When I research the fast 102 intake ppl say you have to use ls2 rails and injectors. I found fast billet rails that say (ls1 style) so I don't know if that means I need ls1 injectors or what. And the compression I can ask someone at trick flow. But since they asked what I was lookong for compression wise figured id tell them and ask about the chamber size.
Btw I like your tbss. I'm a fan of "grocery getters" going fast. Id love to have a g8 gt. But your tbss is pretty cool. That turboed 427 is gonna haul ***.
Compression is your friend. I would shoot for something around 10 to 1.
Twin 0n3 76's are going to be pretty laggy. It'll make power up top though.
Skip the Fast 102 and TB. LS6, LS2, Proflo, any of those. TB over 90mm is way overkill.
Stock crank is ok for what your doing.
80lb Siemen injectors if you're on gas. 160's if E85.
Running at max potential, head gaskets and lifting heads will be the first weakness.
LS9 head gaskets and head stufs.
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80 lb injectors will get you there if you have enough fuel pump.
I agree with the above to skip on the fast intake. Use whatever intake you have. Things don't work the same way with boost as they do N/A. Between the cost and the horror stories I've heard, I'd stay away from the fast for a TT build.
BTW, stock crank is good to 1200whp or so. Save yourself the money.
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80 lb injectors will get you there if you have enough fuel pump.
I agree with the above to skip on the fast intake. Use whatever intake you have. Things don't work the same way with boost as they do N/A. Between the cost and the horror stories I've heard, I'd stay away from the fast for a TT build.
BTW, stock crank is good to 1200whp or so. Save yourself the money.
and keep asking questions if u cant find answers yes a lot of this has been answered but also so many people ask and give bs answers its better to double check
10 to 1 sounds alsome. I'll have arp rod and head bolts. Do.I need to change the main cap bolts??
Ok so ditch the fast. Ls6 intake. 90mm throttle body. Does maf need to be 99mm also?
80# with pump gas correct? Can I use stock ls1 rails? Will they flow enough?? Don't want to buy stock rails when they won't cut it.
Also I planned on ls9 head gaskets
Pretty sure this 5.3 came stock with 243s.
Thanks for the help. It was much needed.
Do away with the MAF and convert to a speed density tune.
Twin 255s might have trouble pushing that much power on 80 lb injectors because of how bad the flow drops when you up the pressure. Walbro 400s aren't much more expensive and will do the job fine. They can be had for less than $250 for the pair and are OEM reliable. They are also quiet when ran in tank.
Looked into E85 and that seems like a good fuel route to take. Will those walbro 400 work for my hp goals with E85?? Also 160# injectors. Does anybody know a brand or link to injectors that will work with proflo intake/rails. And will -8 and -6 return work with E85.
Sorry for the change in directions here. After reading about E85 I decided that's that best option and it cost the same if not less in the long run.
Last question. For now.
With .0024 main bearings and .0026 rod bearing. What's the best oil to keep oil pressure up? And high volume oil pump or high pressure?
Thanks for all the help. It was much needed. As you could tell.
Not saying this to be harsh, its just the truth. Take a few steps back and research. If you have never built performance motors in the past youd be light years ahead buying a complete forged long block from one of the sponsors.
Last edited by Forcefed86; Jan 17, 2014 at 09:15 AM.






