5.3 twin t70s
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Joined: Sep 2011
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From: duncan oklahoma
Car: 1989 Fourmla
Engine: 5.0 305
Transmission: 700R4
Axle/Gears: 2.73
Ik most people won't agree but I got the headers off eBay for like 275 after shipping there stainless steel and I got the intercooler off eBay also it's 30x11x3 I'm still trying to decide the best place to put it
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Member
Joined: Sep 2011
Posts: 108
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From: duncan oklahoma
Car: 1989 Fourmla
Engine: 5.0 305
Transmission: 700R4
Axle/Gears: 2.73
Re: 5.3 twin t70s
im wondering if you could help me find the rpm rang for the turbos the specs on them are Compressor:
•Trim: 59
•Inducer: 56.2
•Exducer:72.9
•A/R: 0.70
Turbine:
•Trim: 62
•Inducer: 73.9
•Exducer: 58.3
•A/R: 0.84
I don't really understand all that but I got the triple 12 cam and ls2 intake I just wanna know when ill start to spool I was thinking going with a 3k stall but I wanna be able to start spooling on the brake when I go to the track I would like to leave under boost but idk if that's the goal or not lol
•Trim: 59
•Inducer: 56.2
•Exducer:72.9
•A/R: 0.70
Turbine:
•Trim: 62
•Inducer: 73.9
•Exducer: 58.3
•A/R: 0.84
I don't really understand all that but I got the triple 12 cam and ls2 intake I just wanna know when ill start to spool I was thinking going with a 3k stall but I wanna be able to start spooling on the brake when I go to the track I would like to leave under boost but idk if that's the goal or not lol
Joined: Sep 2003
Posts: 25,895
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From: Pittsburgh PA
Car: 89 Iroc-z
Engine: 555 BBC Turbo
Transmission: TH400
Axle/Gears: MWC 9” 3.00
Re: 5.3 twin t70s
Tune will help spool but that setup should be alive by 3000. My friends twin 62-1's where lit by then on a 5.3. Started spoolin late 2000's rpm with a smaller housing. My 60's with similar turbine but .68 ar were spooled in the low 3000 range
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Joined: Sep 2011
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From: duncan oklahoma
Car: 1989 Fourmla
Engine: 5.0 305
Transmission: 700R4
Axle/Gears: 2.73
Ok sweet that is about were I wanna be on the rpm range I plan to run a 3 bar map sensor I wanna more then 15 psi in the future
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Joined: Sep 2011
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From: duncan oklahoma
Car: 1989 Fourmla
Engine: 5.0 305
Transmission: 700R4
Axle/Gears: 2.73
Re: 5.3 twin t70s
im looking at getting a new map senor mine broke and im wondering should I just get a 3 bar and im still running the maf
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Joined: Sep 2011
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From: duncan oklahoma
Car: 1989 Fourmla
Engine: 5.0 305
Transmission: 700R4
Axle/Gears: 2.73
What do you mean 3 pig tell operating system and won't not have a maf be a prob? We have a lot of temp changes here in Oklahoma
Joined: Sep 2003
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From: Pittsburgh PA
Car: 89 Iroc-z
Engine: 555 BBC Turbo
Transmission: TH400
Axle/Gears: MWC 9” 3.00
Re: 5.3 twin t70s
3 bar map operating system tune. That will delete the maf and no, it wont be a big deal in temp swings. There are other control parameters that can compensate but in general i've never seen my tunes vary that much from 30's deg to 90's deg
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From: Windsor Ontario
Car: 1987 Z28
Engine: 2005 5.3L, LS6 Cam
Transmission: T56
Axle/Gears: DTS 9" 3.50 TrueTrac
Re: 5.3 twin t70s
MAFs max out around the 450-500whp range. However once you max them you can tune using PE etc. I did this on my old 383 LT1 74mm...I was making 584whp with a maf. Never could get a tune dialed in though.
My 370 LS I went straight to SD 2 bar, as I will on my current 87.
Jay
My 370 LS I went straight to SD 2 bar, as I will on my current 87.
Jay
Joined: Sep 2003
Posts: 25,895
Likes: 429
From: Pittsburgh PA
Car: 89 Iroc-z
Engine: 555 BBC Turbo
Transmission: TH400
Axle/Gears: MWC 9” 3.00
Re: 5.3 twin t70s
Maf is just sorta not needed in FI. You can run one but you gotta add it into your charge piping. Easiest to delete and run straight pipe to tb
Joined: Sep 2003
Posts: 25,895
Likes: 429
From: Pittsburgh PA
Car: 89 Iroc-z
Engine: 555 BBC Turbo
Transmission: TH400
Axle/Gears: MWC 9” 3.00
Re: 5.3 twin t70s
You will still need a sensor. Run fbody operating system, the iat sensor is separate from the maf
The tune will use the iat for fuel and timing changes for different air conditions to a point but its reallly needed for boost tuning. You add safety to the tune by pulling timing and richening up fuel when iat gets to hot
The tune will use the iat for fuel and timing changes for different air conditions to a point but its reallly needed for boost tuning. You add safety to the tune by pulling timing and richening up fuel when iat gets to hot
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Joined: Sep 2011
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From: duncan oklahoma
Car: 1989 Fourmla
Engine: 5.0 305
Transmission: 700R4
Axle/Gears: 2.73
Ohh ok gotcha well when I get out of class I'm going to do some reading over sd but all I really need to do is delete maf and the tuner do all his tunes from the map sensor
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Joined: Sep 2011
Posts: 108
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From: duncan oklahoma
Car: 1989 Fourmla
Engine: 5.0 305
Transmission: 700R4
Axle/Gears: 2.73
Re: 5.3 twin t70s
Hey guys im trying to decied what would be better to go with im about to order more parts in the next day or 2 my question is what should I go with arp head bolts or studs and if studs could I get a link to the right ones my block is an 05 5.3
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Joined: Sep 2011
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From: duncan oklahoma
Car: 1989 Fourmla
Engine: 5.0 305
Transmission: 700R4
Axle/Gears: 2.73
Hey guys I'm home from college I got my cam in and other goodies I been installing what I can I gotta order some more stuff
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Car: 1991 firebird
Engine: TBI 305 (built)
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Axle/Gears: 4.10
91' bird 305 TBI T-5, trick flow heads, 4.10 gears, full UMI setup, track times coming soon!
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