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Old 02-23-2018, 10:29 AM   #1
 
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Default Turbo guys

I think im going to start getting stuff together to go turbo. Im just curious about tuning. Are there major changes in the tune going from an m90 to turbo? Does blowing thru the MAF affect its readings?
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Old 02-23-2018, 10:32 AM   #2
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you have to account for the maf somehow.

mine is scaled with a mini afc iirc...

or run a bigger one, or whatever other options.

aside from that, my car ran fine when first turbo'd on an emailed zzp s/c i/c 3.2 header tune
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Old 02-23-2018, 10:34 AM   #3
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others probably won't like it cuz tcg hates zzp but if i were to do it again id run one of these.

https://zzperformance.com/3800/fixed...-mini-afc.html
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Old 02-23-2018, 10:43 AM   #4
 
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ok, thanks. I just don't want to overlook something and after going thru the time/work to fab a turbo setup, come to find out i missed a critical part of going turbo. I have alot more research to do before i actually tackle the job. The turbo part i can handle, but there are a few things i have questions about.
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Old 02-23-2018, 10:46 AM   #5
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What else do you have questions about?
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Old 02-23-2018, 10:49 AM   #6
 
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The AFC's work well. A lot of guys are now switching to LS7 MAF's in a 4" tube instead though. You get a little more resolution.
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Old 02-23-2018, 10:54 AM   #7
 
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Im going run the blower case with a block off for now, do I have to do anything with the stock blower bypass valve? or just leave it alone?
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Old 02-23-2018, 10:55 AM   #8
 
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The AFC's work well. A lot of guys are now switching to LS7 MAF's in a 4" tube instead though. You get a little more resolution.
Do they blow thru it? Or have the maf Pre-turbo?
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Old 02-23-2018, 11:03 AM   #9
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Do they blow thru it? Or have the maf Pre-turbo?
I don't think anyone has a pre-turbo MAF setup. What power numbers are you going for? For simplicity's sake, just stick with a stock maf and scale it VIA HPT or with AFC.
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Old 02-23-2018, 11:16 AM   #10
 
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I ran and for now, still run a stock MAF with a mini AFC.

I already knew others went near 9s on em, so why not me.

One less coupler to fiddle fart with also.

Plus only had 2.5" IC pipes.. So trying to ramp up to 4" MAF and then back down to the stock TB coupling just wasn't worth it for me.

I may revisit it again on the new setup eventually.. Only running 10psi right now on the 7675... if things start getting harry on the AFC scaling as
there is a "limit" on how far you really want to scale... so if it gets funky, I will have to start looking into the 4" MAF eventually, but at least I have 3" IC pipes now so bit better on the ramp up size.

I think issues with MAF pre turbo was partly being able to account for BOV? ... MAF says X air flow and engine gets Y air flow. I know of at least 1 car that tried this in the early days and
car would shut off all the time... maybe intense white car? i forget.
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Old 02-23-2018, 11:29 AM   #11
 
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I don't think anyone has a pre-turbo MAF setup. What power numbers are you going for? For simplicity's sake, just stick with a stock maf and scale it VIA HPT or with AFC.
Im not going for huge power. Id like around 350whp. Just a fun daily driver. I feel like the blower just doesnt complement a FWD car. Blows the tires off then once you have traction, its created so much heat, it has KR and kills power. Its fun for burnouts and chipping pistons, but thats it really. At least for me. haha
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Old 02-23-2018, 11:30 AM   #12
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i mean. any speed under like 50/60 mph still gonna do the same shit.
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Old 02-23-2018, 11:34 AM   #13
 
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haha, yeah i guess your probably right
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Old 02-23-2018, 11:36 AM   #14
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Im not going for huge power. Id like around 350whp. Just a fun daily driver. I feel like the blower just doesnt complement a FWD car. Blows the tires off then once you have traction, its created so much heat, it has KR and kills power. Its fun for burnouts and chipping pistons, but thats it really. At least for me. haha
The TQ band in a turbo car is suuuuuuper strong, it'll blow the tires off, but the top end is never ending and turbo's are like 100000x easier to tune. At 350whp you don't need to over-complicate anything. Just use the stock maf and scale it with your tuner. What's all done? Stock? It really just needs to be stock to make that power all day.
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Old 02-23-2018, 11:48 AM   #15
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and pray the trans hold up.
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Old 02-23-2018, 11:49 AM   #16
 
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L32 short block, VS cam, ported heads.
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Old 02-23-2018, 11:50 AM   #17
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It'd be a BREEEEEZE to make 350whp with that. VS cam is a good turbo cam too. What springs do you have?
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Old 02-23-2018, 11:51 AM   #18
 
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90lb LS6, single roller chain
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Old 02-23-2018, 11:51 AM   #19
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That'll work. Bolt that turbo on, whatcha waitin' for??
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Old 02-23-2018, 11:52 AM   #20
 
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Tuning wise turbo is so much nicer.... in a since my turbo turd not much is
really changed on the engine tune side of things. This may be to cooler temps and better intercooling allowing for
a better running setup... ?

"A lot" of M90 guys seem to get hooked on tweaking every table they can... ive been guilty.

For the turbo turd, to drive it around and have some fun, like 4.. 5 tables touched and car was scary
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Old 02-23-2018, 11:55 AM   #21
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@BrianG needs to go turbo
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Old 02-23-2018, 11:55 AM   #22
 
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Haha, i've just started gathering parts. I have headers now, so i found a set of stock manifolds and a crossover, im going to try and make my own turbo crossover using the stock one. I dont think it will be too hard.
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Old 02-23-2018, 11:57 AM   #23
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Haha, i've just started gathering parts. I have headers now, so i found a set of stock manifolds and a crossover, im going to try and make my own turbo crossover using the stock one. I dont think it will be too hard.
Hurry up, I want to live the turbo life again through your build.
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Old 02-23-2018, 11:57 AM   #24
 
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Haha, i've just started gathering parts. I have headers now, so i found a set of stock manifolds and a crossover, im going to try and make my own turbo crossover using the stock one. I dont think it will be too hard.
Hardest part is getting the turbo in good place while also having good room
to route the downpipe around everything... removing ABS and smaller brake booster helps make room

Advise to have a "Test" pipe or two tack welded to a flange, and put that
on the turbo out side, when test fitting the crossover. that way make sure
not in a crappy downpipe bind.

Speaking from personal experience on my old build
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Old 02-23-2018, 12:00 PM   #25
 
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Thanks for the advice.
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