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Gt35r, Gt40, *gt37*???

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Old Aug 12, 2005 | 01:06 AM
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From: char, NC
Gt35r, Gt40, *gt37*???

Alright turbo experts, I have a few questions that are important to me regarding a 2.3l stroker and turbo's. Please chime in if you have used these and can give me your personal opinion.

How much of a difference in spool up is there between the GT35R w/.63 and the GT40? Rpms?

How much of a nitrous shot would you need to use to get the GT40 to spool quick and make it usable at the track on a stroker 2.3l (obviously 1/4) ?

What the heck is a GT37 that Al(dynoflash is referring to) and how does it compare?

What can you do to a GT35R to make it able to produce close to the same hp/flow as the GT40?

What are the MAX psi you can safely run on all of the turbo's without going outside of the efficiency range of the turbo?

GT35R @ (_?_)psi
GT40 @ (_?_)psi
?GT37 @ (_?_)psi

Thanks for your replies!

Last edited by EVOONYOASS; Aug 13, 2005 at 07:05 AM.
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Old Aug 12, 2005 | 02:40 AM
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my vote is for the gt-35
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Old Aug 12, 2005 | 06:04 AM
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20 grand?

20 grand?
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Old Aug 12, 2005 | 06:09 AM
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knowledge of turbos is no way to determine how much money someone has to spend.
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Old Aug 12, 2005 | 06:30 AM
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Sorry I don't have any real fruitful information to give you evoonyoass I would suggest asking ams or any of the other major vendors and then report back with your findings. Unfortunately when you ask questions on these forums the newbies try and control to post.

oh and jasil since he cant ask questions that meets your standers, please enlighten us with what you approve as a good post. I mean the way your pushing Evoony around you must be a mod or have years of Evom under your belt. I swear sometimes it seems like every new post comes with "do a search" or "not another thread like this..." I have been on these forums sence they opened and started posting the day I bought my evo. Meaning I have seen tons and tons of post just like this but each new one seems to have some type of updated and vaild information that someone can use. Yes the search button is great but there are so many post out there you have to edit and work the search button for hours to find something close to what your looking for.

Again Evoonyoass, im sorry I dont have any good information to add to your thread. But for what its worth Al recently said the best setup he has been in for street/ strip is 2.3l and 35r. He said it feels damn near stock on spool up!!!! I would say the 35r is the turbo to go with for any drag events. I will admit that jasil is right though on the price. 20k Is going to be pretty vaild price quote on such a monster. I have some quotes from AMS that were sent to me asking what would be the right build. With price of parts and labor on an already modded car I got a quote of 26k and 19.5k!!! Hints the reason Im takeing it slow and doing an almost a-la-cart build up. Full-race offered me such a killer deal on there kit I couldnt say no. Note im running a 3037 not the 35r. I dont want that untill I build the motor to rev high or stroke it to 2.3l

Well when you do find the answer to your question please post it up as I would like to know the answer myself.

Last edited by EidolaDream; Aug 12, 2005 at 06:35 AM.
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Old Aug 12, 2005 | 06:36 AM
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if i was gonna pick a turbo with a stroked motor, i would go with the 35r and the .72 AR not the .63

with the 2.3L you won't notice much of a difference in spool and you won't be choking the turbo at high RPMs and high boost.

Last edited by gsujeff55; Aug 12, 2005 at 06:44 AM.
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Old Aug 12, 2005 | 10:36 PM
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From: char, NC
Originally Posted by rufus1
20 grand?
I didn't ask how much? I have an unlimited budget.

Originally Posted by EidolaDream
oh and jasil since he cant ask questions that meets your standers, please enlighten us with what you approve as a good post. I mean the way your pushing Evoony around you must be a mod or have years of Evom under your belt. I swear sometimes it seems like every new post comes with "do a search" or "not another thread like this..."
Who is Jasil and what the heck are you talking about? Thanks for the suggestions though Eidola.
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Old Aug 13, 2005 | 07:06 AM
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bumper
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Old Aug 13, 2005 | 07:19 AM
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EVOONYOASS,

If you have a unlimited budget why are you on a message board asking questions instead of building your car? Do you think the posters here, myself included, have more knowledge than Buschur, AMS, Switzer, TurboTrix etc?

EidolaDream,

It's a stupid post. What intercooler is best? What turbo is best? What catback is best? There is no best. All the race cores are about the same, turbos are turbos match the compressor map to the engine size and read the chart, exhausts are just freaking pieces of pipe 3'' is 3 inches.

Most people that post stuff like this never go and build the 20K machine anyway. Call me a cynic I guess. I'll be looking forward to seeing the 600awhp dynosheets that EVOONYASS will be posting soon.
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Old Aug 13, 2005 | 07:29 AM
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From: char, NC
Originally Posted by Jasil
EVOONYOASS,

If you have a unlimited budget why are you on a message board asking questions instead of building your car? Do you think the posters here, myself included, have more knowledge than Buschur, AMS, Switzer, TurboTrix etc?

EidolaDream,

It's a stupid post. What intercooler is best? What turbo is best? What catback is best? There is no best. All the race cores are about the same, turbos are turbos match the compressor map to the engine size and read the chart, exhausts are just freaking pieces of pipe 3'' is 3 inches.

Most people that post stuff like this never go and build the 20K machine anyway. Call me a cynic I guess. I'll be looking forward to seeing the 600awhp dynosheets that EVOONYASS will be posting soon.
Wow Jasil, wtf is your problem? Before I make the final decisions I wanted a little input from people who have used them first hand and get their personal opinion. Business people just try and talk you in to what they THINK is the best setup which is ultimately their OWN opinion. I do respect their opinion and it will be taken into account, but like I said I wanted to see who has possibly used both turbo's.

I also don't know anything about the GT37 and wanted to find out a little more about it. Sorry for wasting your time, but nobody said you had to respond. This is a car forum ya know.

The search button can't give you the answers you are looking for all the time.

Don't you worry about how much money I have and IF I will be able to build something. When the car is finished I will have the person who builds and tunes it post something up to shut you up. You obviously have some issues going on or you're just having a bad day or something. Go get laid, you sound uptight.

Last edited by EVOONYOASS; Aug 13, 2005 at 07:42 AM.
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Old Aug 13, 2005 | 07:32 AM
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I would say gt35r, or a gt35/40r from atp, If your super serious about all out power, perhaps talk to AMS about the gt42r.. But I have a feeling the 35r or the 35r/40r would be your best bet.
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Old Aug 13, 2005 | 07:33 AM
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From: char, NC
Originally Posted by Jasil
EVOONYOASS,
It's a stupid post. What intercooler is best? What turbo is best? What catback is best? There is no best. All the race cores are about the same, turbos are turbos match the compressor map to the engine size and read the chart, exhausts are just freaking pieces of pipe 3'' is 3 inches.
I don't recall asking which is best now did I.

...and better yet, how did ediola know you were going to post something before you actually posted it. Is this a joke?
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Old Aug 13, 2005 | 07:39 AM
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Where can I find the compressor map compared to the engine size for these turbo's? Or is this too much to ask on a car forum, Jasil? I should just go shoot myself now for asking these innapropriate questions on a car forum.
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Old Aug 13, 2005 | 12:34 PM
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bump
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Old Aug 13, 2005 | 12:41 PM
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EVOONYASS,

I will assume that you have a unlimited budget and just want opinions from fellow EVOM members. The following is my 02:

AMS is running a 35R, TurboTrix is on one of their cars, Bushcur has 2 cars running a 35R, Al had a 35R, the notorious "Black EVO" had a 35R, Magnus has been doing 35R's since they came out, 3 NABR member's have 35R's.

RNR is running a 40, Bushcur sold some 40's I don't know of anyone else running one.

Al now has a 42, the "Black EVO" has a 42, AMS has a 42 on the car when they drag it, Magnus has a 42 on his car.

Why buck the system? A rule of thumb when sizing a turbo for a application is use the smallest turbo that will get you the HP that you need. Anybody will tell you this. Why use a 42 if a 35 will get you there? It just presents more lag into the equation.

The 35R has been proven to be reliable in the 35psi range putting down in the excess of 650awhp and putting almost full weight cars into the 140mph trap range. If your saying to yourself right now that "No, I need more power than that 140mph won't cut it" I would then look at the 42 are or nitrous on a 35R. Full boost on a 35R is between 4k-4.5K on a stroker, which is still a fair amount of lag compared to the stockers 3.6K, but more than acceptable.

You can look at compressor maps at http://www.turbocalculator.com/garret.html there are no maps for the GT series turbos.....at least they are not available to the public.

I have to stress the importance of bringing your car to a proven shop. Buschur, AMS, TT etc have been around for a long time they do this every single day. Some of these shops have produced 7 second cars. Buschur's blocks are used in Shephard's car! AMS has turned out more 35R's than any shop I know, TT has the fastest EVO8. All of these shops can build you a 600awhp++ EVO and all will stand by their work. In the end the parts used will be similiar this isn't rocket sciene, but experience is priceless, so don't use some fly by night shop.

As far as spool on the larger turbos you will have to wait until Chris's car is done or call Martin at AMS and ask them what type of spool up they saw on there 42. Al's and TT's car have a 2.0 so apples to oranges there.

Go read the drag racing thread from TopnotchEVO he has all these mods from all these different vendor's, tuning issues etc, talked more smack then you know what, and ran 12.4's. Buschur built the black car, tuned it, went to the track and ran 10's@135mph+ all in a time frame of 2 weeks....and it should post better times since he coaxed another 40+hp from it. Lesson here take it to a PRO!!!

Last edited by Jasil; Aug 13, 2005 at 12:44 PM.
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