Dead horse beating! S475 vs s480 vs 7875 vs 7883
02-17-2023, 10:45 AM
#121
Why does everyone always jump to “it must be tune related”?
I tune my own cars and also the truck in question and the tune was definitely not the issue. Had a question about plugs the other day and got ole it must be the tune response even though you can find probably a thousand other people that agree that tr6s just idle better than br7s on e85.
Anyways tune wasn’t an issue the bigger on3 was just a POS and the vs borg is still a great turbo he just wishes it had that low end instant torque he had with the 7875.
I tune my own cars and also the truck in question and the tune was definitely not the issue. Had a question about plugs the other day and got ole it must be the tune response even though you can find probably a thousand other people that agree that tr6s just idle better than br7s on e85.
Anyways tune wasn’t an issue the bigger on3 was just a POS and the vs borg is still a great turbo he just wishes it had that low end instant torque he had with the 7875.
If you're a tuner, then you know a car can run decently and make power but someone who really knows what they're doing can have a car making power in places where others fall flat, at least that has been my experience.
I definitely agree turbo manufacturer plays a big roll too, some use old technology like On3 and VS with their turbine wheels, other like FIS are always looking for an edge which shows up in performance and unfortunately price.
I think we'd all agree some combinations just like certain things, I run the BR7EF plugs as well and was told they don't idle well on the street, my car seems just fine but others obviously have issues, just gotta try things out sometimes and see how the car reacts right?
A 454 BBC for example would easily suck up a 200-250hp shot without issue, the OP will end up smacking his buddy around and the next weekend his buddy will toss on a kit and knock his dick in the dirt lol.
I'm just playing devils advocate here of course and yes the OP will be in a much better position to continue to keep up.
I just say this because I have a couple of friends that I go back and forth with just like this and now we're all running larger turbos, auto transmissions etc. and talking trash like we're still in high school lol.
02-17-2023, 10:50 AM
#122
It's great to see seriously debate turbo options, this is what makes forums great.
My data point, my 85/96 T6 5.3 is laggy, the caveat being I'm not sure I have the best converter for my application.
But when she lights off you need to move over, car hauls some serious ***. Screwing around on 10-14 lbs I can tell the car is as I've been in a car which is 9.30s.
My data point, my 85/96 T6 5.3 is laggy, the caveat being I'm not sure I have the best converter for my application.
But when she lights off you need to move over, car hauls some serious ***. Screwing around on 10-14 lbs I can tell the car is as I've been in a car which is 9.30s.
This is what I want, I want to run as much boost on pump gas as possible, I'm jealous of you E85 guys because you can make much more power so easily and safely.
I can't wait for your new engine and 30 lbs. of boost.
02-17-2023, 12:58 PM
#123
I didn't say it MUST be the tune, I said the tune has a lot to do with it as well as the other items I mentioned and the myriad of other items that it could be that I didn't mention.
If you're a tuner, then you know a car can run decently and make power but someone who really knows what they're doing can have a car making power in places where others fall flat, at least that has been my experience.
I definitely agree turbo manufacturer plays a big roll too, some use old technology like On3 and VS with their turbine wheels, other like FIS are always looking for an edge which shows up in performance and unfortunately price.
I think we'd all agree some combinations just like certain things, I run the BR7EF plugs as well and was told they don't idle well on the street, my car seems just fine but others obviously have issues, just gotta try things out sometimes and see how the car reacts right?
If you're a tuner, then you know a car can run decently and make power but someone who really knows what they're doing can have a car making power in places where others fall flat, at least that has been my experience.
I definitely agree turbo manufacturer plays a big roll too, some use old technology like On3 and VS with their turbine wheels, other like FIS are always looking for an edge which shows up in performance and unfortunately price.
I think we'd all agree some combinations just like certain things, I run the BR7EF plugs as well and was told they don't idle well on the street, my car seems just fine but others obviously have issues, just gotta try things out sometimes and see how the car reacts right?
02-17-2023, 01:13 PM
#124
Do you get codes or you just hear it or what?
My tuner suggested TR6's for street driving for the same reason but my idle is choppy enough that I don't think I'd notice anyways, maybe the idle wouldn't be as choppy with TR6's, not sure I'd wanna change it because I like it lol.
Plus I don't want to mess around with swapping plugs and last time I had one out it looked clean so I just run them.
02-17-2023, 03:54 PM
#125
You want to try and talk a big game about all these "guys that know what they're doing are giggling". You called out Jose at FI but never responded when I said I've already talked to him over a decade ago about this very thing and he went with the smaller T4 turbo. Do you want to know which user name he used on here to have that discussion? How about the discussion that happened on FB and the people who design and build race cars for class racing stated the same thing about going with the smaller turbo. People YOU know of. But you go right ahead and keep talking that big game. OP is already making the right decision based on HIS intended use and the weight of HIS vehicle. You do you bud.
Again, I don't value your opinion as you have no direct experience. Go try all the turbos mentioned here on a 370 w a street/strip drag application. Then come back w data and I'll respect your opinion. Now I know you aren't going to lose any sleep over that... and will probably never do it. That's cool. As I said, I'm not trying to change your mind... I'm trying to help someone new.
The OP has made a poor decision if he is listening to the bandwagon monkeys instead of those with experience. But thats his call... I'm good with that too.
Last edited by Forcefed86; 02-17-2023 at 04:03 PM.
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02-17-2023, 11:55 PM
#129
Staging Lane
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02-18-2023, 11:27 AM
#131
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02-18-2023, 11:37 AM
#132
Like I said I've had class racers and builders and turbo manufacturers all tell me T4 for a heavy weight street car that is more street and rarely strip. That's all. I think we've both made our points and can leave well enough alone now. We're both pissing in the wind. Hey, at least we both think the RX7 has a back pressure issue right? 
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02-19-2023, 10:33 PM
#139
I'm so confused on what to do
Heck I've thought about buying a cheap lsa set up and just having less power.
02-20-2023, 06:15 AM
#140
https://ls1tech.com/forums/forced-in...down-pipe.html