|06-06-2004 12:37 AM|
The GT28RS flows slightly more than the R, and because of a different ratio between the inducer and exducer it has a better "map" for low end. It's also a very small compressor wheel flowing a lot of air.
The GT28RS is good to about 35 lbs/min ... the TD04 from a Viggen or Aero is good to about 29 lbs/min ... and the GT32 is good to about 39 lbs/min.
35 lbs/min is usually good for anywhere between 370-400 hp. ATP has compressor maps for all of the common GT series turbochargers.
But honestly, you don't have nearly enough money (well, based on how much you said you just got, maybe you have some stored up?) to support a fully built upgraded turbo.
There's a lot you can and should do before then. It can be very fast without an upgraded turbo. Besides the stock GT25 is still good to 260-280 hp, which is quite a bit.
|06-01-2004 11:04 AM|
Yes they are. The R on the end represents. With duel ball bearing, the gains for spool up time can up to 15%, so that mean 0-60 will be quicker. Also there is less change for oil leaks. There are a lot of gains, if you want more info check out Garrettís site.
|06-01-2004 11:00 AM|
|driver found||Both are. In general, the "R" after a turbo name for a GT series Garrett turbo indicates ball bearing.|
|06-01-2004 10:50 AM|
|CO-Saab||Are either the GT28R or GT28RS ball bearing turbo's?|
|06-01-2004 10:22 AM|
here you go, i have this site in my favorites also, just found it the other day kind forgot about it. Thanks for bringing it up.
|06-01-2004 10:20 AM|
|06-01-2004 10:10 AM|
Check this link for ATP's site, they have it for $770 as I mentioned above - beats the price at the place you linked to.
|06-01-2004 10:06 AM|
Ya he was probly figureing that if i sold my other turbo. But only for 900 you can get a GT28R
I have a few other stores that i can buy from, good prices also.
you can find them anyware
|06-01-2004 10:04 AM|
Entire turbo conversion kits using GT28's might cost that much, but the turbo itself isn't that expensive.
ATP has them for $780, and the GT28RS for $1,180.
A quick search on froogle turned up dozens of results for "GT28R Turbo" in the $800 - $900 range.
|06-01-2004 09:53 AM|
|05-31-2004 10:07 PM|
|BurnsSide42||well said ERP|
|05-31-2004 09:31 PM|
Hey Snow, everyone has given you good advise and I think you know what needs to be done, so I will advise you on how to do it. Remember that the stock injectors max out between 270-280 hp and the stock T25 will easily get you 250 hp. With that said I suggest you do the intake, exhaust, intercooler and stage 3 ECU first. See how you like it and you will learn where the problems are in the overall performance. At that stage it starts to become personal preference. You might want to spend the rest of your money on suspension, brakes or cosmetic upgrades, or go for more power.
I really like the 270 hp of my Saab, but with stock shocks I end up slowing down in tight turns because the suspension canít handle the power. Iím happy with my relatively small TD04 and plan to take it to 300-320 hp with a few more upgrades. But anymore than that and the cost just get too large. Take it in steps and you can build your perfect Saab.
|05-30-2004 12:45 PM|
The subframe brace is a touchy subject right now. I believe that with a 3inch dp, it wont clear. So you have to use spacers, wich, inturn, actually gives the brace more room to flex thus negating its effectivness. plus, you have almost no ground clearence if you drop the car too.
Really for just a $250 diff in price on the turbo, go with whatever you want. I assume there is no core charge. And if you dont do the rebuild, at least you have your turbo when the old one comes out. Plust you can sell it online to somebody to make up extra $$ at least the $250 extra you spent.
Check a few pages back..ok here is the link on the front sway bar, its actually a stock Saab part.
|05-30-2004 11:59 AM|
Personally, I think he has an excellent plan to get the most expensive things while he has the money. And if it turns out that he needs more upgrades to achieve the maximum potential of the new parts, then the cost won't be that much more.
But definately get the basics like you've already listed:
$575 - Full 3" exhaust from turbo back(Catless)
$70 - Free Flow Cat
$50 - Intake (I can sell you one for a good price, if you don't have one)
$535 - ECU
$250 - Intercooler
|05-30-2004 11:21 AM|
In fact, with $2300, I'd be tempted to keep the stock turbo, and spend the money you would have dumped into a turbo maxing everything else out. Instead of dumping $750 into a bigger turbo, I'd dump it into suspension and a better intercooler, etc.
|05-30-2004 11:08 AM|
|snow4_1man||Boxer Chip that was already in the plan, I making everything I can 3''. Tweak still need some info on the turbo choice.|
|05-30-2004 11:04 AM|
|Boxerchip||yeah, I would open up your air flow making everything 3 inch, then get a nice ECU|
|05-30-2004 10:56 AM|
Right now I am bone stock.
Yeah thatís exactly right on what you had Tweak. Those are the parts that I plan on getting. But what do you think I should do about the turbo. I would like to go with a GT28RS or just R good for about 330hp or a GT32 is good for 200 up to 400hp I can spare the little extra money. I want to be able to reach stage 5 without having to upgrade my turbo.
Also who makes the front sway bar? I don't think this is made yet. I was reading about the exhaust dump housing. It seams very impressive. If makes your turbo spool up quicker, then I would just go with a GT32, but Iím not sure at what RPM this turbo spools at, Iím guessing around 3400. That dump housing sounds awesome and fairly cheap, but every review I was reading said that the noise is very loud, and catches the attention of the cops.
So my goal is to be able to spool at low RPM's but have enough power in my turbo to upgrade to a stage 6. I don't want to get a turbo thatís to big therefore needing more parts to support it. I would just like to be able to run at lower boost for now but still get good response. Also I would like to be able to make about 280hp. What other items would you add?
I plan on upgrading the suspension to my car, right after this project. Converting my car to all polly bushing would be awesome, how much do you figure that would cost? With abbots sub frame brace, do you think thatís a better buy then the one Taliaferro has?
Thanks for you help,
|05-30-2004 09:21 AM|
|WS||yeah that seems right i guess, all my facts are on na cars.... . It still seems wierd though that they lose peak hp with a dual exhaust which would mean it creates more backpressure. Im sure going from single to dual would create a larger area for the air to go out, but i doubt it will flow properly.|
|05-30-2004 09:11 AM|
Actually WS, the turbo makes all the backpressure the engine needs. The thing you want to do now is take all the exhaust away from the turbo, thus giving it better spool up time, and putting the torque in a useable location.
I plan on getting an electric exhaust dump shortly. That would in your theory give me no back pressure. However the turbo will remain, and thus give a constant amount. After the turbo, there will be none whatsoever, causing an incredibly fast spool up.
NOTE: I have a 95 with only 1 O2 Sensor, 96 and newer cars, do not try.
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