Fondle

[flamingchicken]

Re: Fondle

Fondle is correct. Different turbos can flow different amounts of air at the same psi, thus creating different amounts of power output.

okay, tell me if im correct.

Big turbo, will flow more air, but since it has a larger compressor housing it may not compress it as much.

Small turbo, will flow less air, but since the compressor housing is smaller, it will compact the air together more, ie more psi....

do i understand??

[caspernicus]

Re: Fondle

i edited the maf tables before i got a chance to try to max them

Scan the "Mass air flow (Hz)". If you go over 11500hz, then you're maxing
your maf. Doesn't matter how you've scaled the table.

[caspernicus]

Re: Fondle

okay, tell me if im correct.

Big turbo, will flow more air, but since it has a larger compressor housing it may not compress it as much.

Small turbo, will flow less air, but since the compressor housing is smaller, it will compact the air together more, ie more psi....

do i understand??

The bigger turbo will compress the air just as much (same boost reading),
but it will be at a higher rpm than the smaller one. Don't get hung up on
boost readings.

[flamingchicken]

Re: Fondle

The bigger turbo will compress the air just as much (same boost reading),
but it will be at a higher rpm than the smaller one.

oh, okay, faster flow rate.

correct?

[caspernicus]

Re: Fondle

Yeah kinda.

Assuming the same boost level, the bigger turbo will have a higher peak flow
rate, but the smaller one will reach it's peak flow rate earlier in the rpm range.

[Fondle]

Re: Fondle

its kinda of difficult to put in to words i guess, but 12" on one ruler is 12" on another ruler, but 14psi from one turbo, is not the same 14psi from another turbo

14psi is what my intake is seeing, but there will be a different volume of air entering the intake depending on what size turbo is pushing 14psi

[ssms5411]

Re: Fondle

They rate them in LBS per min, like my GT35R is like 65lbs per min. but still if your PSI gauge is showing 14PSI thats how much above ambient it is flowing into the combustion cylinders. Just like my Powerdyne I got up to 11 PSI and my 36lb injectors(33LB on our F-bodies) would show 110% duty cycle, and my maf would be at 37.xx which was just about maxing it out, but thats where the PE tables come into play. My GT35R with a 70 A/R housing and .63 A/R exhaust 3" V band and is rated for about 6000 RPMS , after that it will fall off or choke up top, it is also smaller unit than the MP70 and is half the weight, but it will start spooling at 2200 rpms and by 2800 rpms reach full PSI until 6000 RPMS. Thats why I needed 65lb(60LB )injectors to keep the duty cycle lower. So a bigger turbo will put more air in but it will still read PSI as PSI just depends on how effiecent the turbos are at maintaining the PSI, spool time and lag. I've seen too big of turbos on cars and yes they say their at 12 PSI , but then look at their dyno graph and it spikes for like 200 rpms to get their 350 Wrhp then dropped like crazy so if you were to average the wrhp it would be like 300 wrhp or so, Dyno graphs will tell the story like caspernicus said. Bigger is not always better, I would perfer a proper match turbo that I have usuable power all the way through my powerband, with no spikes just a nice curve up to 6000 RPMS. Also have to remember the stock valve springs are going to give you valve float at a certain point. Also Fondle I thought you could fit a can under your pipping , from the looks of that pic you have 3-4"s of clearance compared to the sidewall height of your tires. Plus with no suspension mods I don't see any chance you pulling on a Mach 1 mustang with bolt-ons , you would just loose traction, running 14 PSI. Just my opinion though.

[Fondle]

Re: Fondle

when i raced the mach one i was only on 9lbs, and i have bmr lower control arms, and im on a set of 275 nitto 555r, so traction loss isnt too bad, we didnt go from a dig, it was around a 30roll

my friend i was with at the time knows the guy i raced because he is in a mustang club with him, he says he just had intake and mufflers, at the wheels he is probably putting down 280 i would guess because i think the mach1 are rated 310 factory, i dont get why people think v6 camaro's cant beat mustangs,especially when im boosted

the piping question, the springs i put in were from my friends old v6 that hadnt been used in a year or so, so after they settled it dropped a little bit more, so no a monster can cannot fit under it now, im not worried what i can fit under my car, i just want it to be driveable, i havent bottom'd out yet, and when i go over speed bumps i just center my car so the under k piece goes between the two speed bumps

[Shirl]

Re: Fondle

Locking AGAIN. I don't have time to edit right now. Take the arguing to email.