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Best turbo on a 1/2 bridge

 
 
 
 
Old 07-28-03, 04:20 PM
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Best turbo on a 1/2 bridge

Hi guys
i need your help i need to know what turbo you all would run on your cars if it hed a 1/2 bridge and you wanted about 500RWHP or more out of it.

Cheers
Erdin
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Old 07-28-03, 04:38 PM
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I am selling my T70 turbo kit that I used on a half/full bridge car. Let me know if you are interested.
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Old 07-28-03, 05:32 PM
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Do you have pics stevnoz? If so, send to [email protected] along with a quote.
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Old 07-28-03, 05:39 PM
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Check out this thread: https://www.rx7club.com/forum/showth...readid=209200. If you need anymore info just pm me or e-mail me at [email protected].
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Old 07-28-03, 05:47 PM
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steve you have dyno charts for bp with T70? I just got a T66 Qtrim to put on half bp
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Old 07-28-03, 08:11 PM
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I think the best advice I can give is shoot for any turbo that you think would work nicely on a side ported motor, and then go up atleast one size on the exhaust housing. I had a Garrett 67-1 (in between T66 and T70) w/P trim A/R 1.15 on my half bridge and it worked very nicely. Good for about 500rwhp at 15psi.
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Old 07-28-03, 08:19 PM
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that t70 was nasty. i had a t78 on my streetport and it was nothing compared to steven's setup.
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Old 07-28-03, 10:13 PM
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Iv been told that the GT42/45 is a good turbo to go for on a half bridge but i just wanted to know what every body els is using on there cars.
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Old 07-29-03, 10:28 AM
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87GTR, what ar did you use? I have a .81 qtrim ready to go, a little small, but it's for road race, and autocross. LMK how it works, BP motor is next, Carl Byck
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Old 07-29-03, 10:30 PM
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using a .96 q trim undev

http://bdc.cyberosity.com/pictures/TonyFarkas/T66/

The onther turbo is a S300 with 1.15 exh dev housing.
didnt spool much until 3rd gear then you better hang on!!!!

im sure the s300 would spool faster if I can get .83 or .91 housing

Last edited by 87GTR; 07-29-03 at 10:35 PM.
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Old 07-29-03, 11:22 PM
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So my .81 undivided may be good for the street port in your and Brians opinion? I am putting the T66 on my supra for now(~800rwhp+795TQ), when I get a little cash, I will put a little smaller turbo on the Supra, and put the T66 on my FC. Are you using the modified OBX mani still? If you are, can you LMK final what you did to fit the T66. Thank you, Carl
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Old 07-30-03, 11:36 AM
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I'm glad you guys are finally putting good size turbos on those 1/2 bridged motors

Thats what I'm planning on doing
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Old 07-31-03, 01:10 AM
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Carl, My turbo would be a good choice for a half bridge
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Old 07-31-03, 05:55 AM
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What turbo are u using mate.
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Old 07-31-03, 09:23 AM
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The Gt 42/45 is expensive at hell. Stick with a Garrett or something that is easily servicable, and cheaper.
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Old 07-31-03, 09:27 AM
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I think the gt 42/45 is too large for half bp you going to need nos to spool it in 1st and 2nd
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Old 07-31-03, 11:14 AM
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Jim, I am "just" street port. Next motor will be a full bridge, I am building it now for the future
Carl Byck
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Old 07-31-03, 11:19 AM
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I don't know about that. The 42/45 is supposed to be pretty ******* mean. I think with the increased flow of a 1/2 bridge it would be good. A street port *may* have problems though.
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Old 07-31-03, 07:05 PM
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Im using a GT42 for my motor...

It will have no problems spooling.
1.15 A/R Divided.

Here's a pic of the monster

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Old 08-01-03, 07:18 AM
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NICE
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Old 08-01-03, 09:46 AM
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Originally posted by 87GTR
I think the gt 42/45 is too large for half bp you going to need nos to spool it in 1st and 2nd
Sorry, not true!

Last edited by TYSON; 08-01-03 at 09:48 AM.
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Old 08-01-03, 11:38 AM
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I had the same turbo as T51 Spl on my car and it would not spool really good in 1st gear until 6500 2nd gear was better and 3 was a lot better.

im just compairing the 42' wheel sizes the turbo I ran. and I just dont see you making lot of boost in 1st gear or 2nd.
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Old 08-01-03, 12:01 PM
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42/45 can make 5 psi in neutral on a small half bridge.
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Old 08-01-03, 12:14 PM
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So Tony, You never said if you are using the OBX or not?
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Old 08-01-03, 01:35 PM
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so guys i dont know if iam asking this in the right way or not but exactly how much air will a 1/2 bridge motor flow so how would u know what the best size of turbo to use is, iam asking cus iv got a 1/2 bridge on my engine with a XS TO4S and was able to produce about 450 at the wheels but it is runing out of puff which i dident know it was going to do or i wouldent have purchased it in the ferst place and my mechanic never warned me that this could happen so this is why iv posted this thread up now.
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