Feedback on my New Build PC'ed 370.
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Staging Lane
Joined: Feb 2010
Posts: 73
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From: LI.NY
Feedback on my New Build PC'ed 370. Hey guys. Most questions have been asked and answered on here for years now. So what i'm asking is, I would like feedback from Anyone out there with a similar build. What HP and TQ there making. And what ET's there running. And from trial and error. What would YOU change, or add, or remove even. Car will be in my 1989 T/A WS6. Going away from the SBC route. Planning to make similar power. But be alot more Streetable with the LS. So here we go- LQ9 370ci, Need help choosing block, and all internals. TFS 235 heads, Procharger F1A-94, Built 4L80, Pro Torqe stall 3800-4200???, Holley Hi Ram intake, Prob going down to 345ish gears (have 373's now), Need help with internals, Cam, and fuel system. Looking to make 850-950RWHP. And run lower 9's. Maybe higher 8's if I set it up form the track. Car is rarely ever driven much. Just does a bit of Street Fighting here on Long Island. Light to Light, 1/8th mile type stuff. Love embarssing rich dudes n there Lambos and Ferrari's out here lol. As far as cam goes. Prob 620+ lift. I do want a chuggy, choppy loud cam. I know it will sound docile comapred to my SBC, and I dont drive the car often at all. So, NO it wont get old or obnoxious to me. CR ratio, want something that wont feel lazy out of boost. Some guys say 9.1, some say 10.1. So again, Questions are Internals, Cam, CR, Gears, Fuel system.
Will be 93oct + meth.
Thank all you LS Experts for you're Help.
And Do not hesitate to throw in anything else i'm sure i'm leaving out.
Will be 93oct + meth.
Thank all you LS Experts for you're Help.
And Do not hesitate to throw in anything else i'm sure i'm leaving out.
Cam should be custom designed by someone like ljms, cam motion, or vengeance. CR with 93+ meth I'd say go 9.3-9.5. Internals should be rods and pistons a factory crank should handle that no prob. Obviously arp everything and sruds where applicable. Your gear choice seems ok.
Thread Starter
Staging Lane
Joined: Feb 2010
Posts: 73
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From: LI.NY
Cam should be custom designed by someone like ljms, cam motion, or vengeance. CR with 93+ meth I'd say go 9.3-9.5. Internals should be rods and pistons a factory crank should handle that no prob. Obviously arp everything and sruds where applicable. Your gear choice seems ok.
^ Right now have a big cube SBC, Older Brodix heads, Built 700R4, 373 eaton 12 bolt, with a rebuilt and pullied up D-1sc. Never dynoed. Prob making around 750-800at the wheels. Car hold's it's own against anything I come across on the Street here. It's been kind of a Secret Combo though.
Would luv to get my AC back in the car right now.. And hear my Radio lol
Idk you will hear a bunch of different ideas but don't worry about revving it to the moon. A lot of big blocks don't rev THAT high and make big power. No reason you can't take a stock crank to 6750-7000rpm and adjust the pulley size on the blower to make boost sooner and spin less rpm. Will make your **** stay together a lot longer. Talk to whoever is going to do your cam and let them help you with a complete set up. It will also make their job easier since they will know exactly what you have. Doesn't mean you have to buy all the parts from them though. Just pick their brain for knowledge. Rick performance was very very helpful when I was buying parts for my 370
Launching!
Joined: Dec 2012
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i'm making 900whp through D1SC on a 427ci setup so somewhat different but on 91 ocatne with dual meth. I would say custom cam for sure and I went with 9.75:1 compression and working very well so far. really curious how the f1a94 works for you. seems like perfect for what you're looking for
that blower will make 1250+ hp so seems like kind of a shame to not put a good crank in there while you have it all apart. If it were me i'd probably go with 1/2' head studs too since its a 4 bolt setup but some may disagree.
that blower will make 1250+ hp so seems like kind of a shame to not put a good crank in there while you have it all apart. If it were me i'd probably go with 1/2' head studs too since its a 4 bolt setup but some may disagree.
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Staging Lane
Joined: Feb 2010
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From: LI.NY
I know the heads come in 6 bolt. Cant you revise the block for 6 bolt heads?
I was thinking about the 427. But alot of $$$. Figure I can make similar power with the 370. neverstop, how much boost are you making?
I was thinking about the 427. But alot of $$$. Figure I can make similar power with the 370. neverstop, how much boost are you making?
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i have a 370 with a s484 i know its turbo but i made 1064 wheel at 20 lbs ith full exhaust and a small intecooler. i have changed the set up now looking for 1300 wheel out of the 370. i have k1 crank, eagle rods ,wisco pistons. i only rev the car to 6700.
ported 317 heads. 10.1 cr, a shop here put the short block together. i am putting a dart ccw crank and wisco rods in it this winter before i turn it up much more. prob pushing the bottom end a bit. this was trough a th400 and a 9in also.
believe it or not i am running the holly mid ram. i wanted it to stay under the stock hood. i just put pro efi on the car and we put a 5" bumper exit exhaust and a huge a/a inter cooler. should prob pick up 100 hp at the same boost as last set up.
Thread Starter
Staging Lane
Joined: Feb 2010
Posts: 73
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From: LI.NY
WOW. I've been researching Intake's for hours now. You are Def leaving power on the table with the mid ram. You should go LSXR to keep stock hood. You will pick up 30-40Hp at least. From the back to back dyno comparisons Iv'e read lately. Car sounds Beasty though!
Check this out,
http://www.hotrod.com/articles/20-ls...ifolds-tested/
Check this out,
http://www.hotrod.com/articles/20-ls...ifolds-tested/
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Sounds like a good combination. A question came up about 6 bolt options. ERL used to spot face the outside of the block and weld bosses to the outside. Then drill, then surface. I don't know if you have access to a mill, but it wouldn't need to be expensive to be effective.
Meth has a point where it doesn't like turning corners in the factory style intake manifold and mixture distribution is lacking. If that's how you want to fuel it, it does sound like a ram style intake with a better spray pattern would be safer at the expense of some torque. 3rd Gen TA's are so cool that I'd hesitate to go through the hood with a Hi-Ram too.
If you have any questions about the TFS 235's, let me know.
Meth has a point where it doesn't like turning corners in the factory style intake manifold and mixture distribution is lacking. If that's how you want to fuel it, it does sound like a ram style intake with a better spray pattern would be safer at the expense of some torque. 3rd Gen TA's are so cool that I'd hesitate to go through the hood with a Hi-Ram too.
If you have any questions about the TFS 235's, let me know.
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Staging Lane
Joined: Feb 2010
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From: LI.NY
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You're going to find the less restriction = more power at less boost = lower IAT's.
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Thread Starter
Staging Lane
Joined: Feb 2010
Posts: 73
Likes: 0
From: LI.NY
Sounds like a good combination. A question came up about 6 bolt options. ERL used to spot face the outside of the block and weld bosses to the outside. Then drill, then surface. I don't know if you have access to a mill, but it wouldn't need to be expensive to be effective.
Meth has a point where it doesn't like turning corners in the factory style intake manifold and mixture distribution is lacking. If that's how you want to fuel it, it does sound like a ram style intake with a better spray pattern would be safer at the expense of some torque. 3rd Gen TA's are so cool that I'd hesitate to go through the hood with a Hi-Ram too.
If you have any questions about the TFS 235's, let me know.
Meth has a point where it doesn't like turning corners in the factory style intake manifold and mixture distribution is lacking. If that's how you want to fuel it, it does sound like a ram style intake with a better spray pattern would be safer at the expense of some torque. 3rd Gen TA's are so cool that I'd hesitate to go through the hood with a Hi-Ram too.
If you have any questions about the TFS 235's, let me know.
Couple TFS235 questions, They are Obv 6 bolt heads. Would that cause a problems mounting them on the 6.0 LQ9 block? I've seen them used on here by alot of guys.Just wondering if there are any obstacles. This is my first LS build. I'm VERY familiar with GEN1 SBC's even GEN2 LTX's. So i'm needing help with this build. Also can't figure out what cc size to go with.
How well does the Holley High Ram match up to the TFS 235's? Would Port/Gasket matching need to be done? Don't want there to be any walls.
Last edited by 89BANDIT; Aug 14, 2017 at 11:32 AM.