t3/t4 turbo

good question

There are alot of options when it comes to upgrading your turbo, most people would say that it is better to lose a littler on the low end spooling to pull through the higher rpm's to redline. The best solution is to purchase a ball bearing turbo with a .45 trim (or near it) for your lower end spooling, and keeps at the higher rpm with no problem. This is an expensive upgrade, but I don't believe there is much as in faster spooling than the factory turbo, but u see what good that does u in higher rpm. This is the turbo that I would recommend to you... much this I am sure will be much disputed, as everyone has there own preferences.

http://www.hksusa.com/products/?id=706

i'd go with the street brawler turbo or check out www.atsracing.net for their kits as well.

i have a 50 trim (.63 ar)..full boost at around 3500 rpm...slight lag but very streetable...

curious

What does everyone think of my choice?? As I am still factory turbo...With the specs listed on the turbo I would have chosen.. I figured it would be a great turbo, expensive new, but in my opinion, should be about right?? I would of course ask someone with an upgraded system b4 I purchased, but I was just curious.

i still am bent on getting a super 16g in my mr2 (mabe a 20g) cheap turbo's even new and amazing power gogo mitsu power with toyota reliablity

MRQturbo said:

i have a 50 trim (.63 ar)..full boost at around 3500 rpm...slight lag but very streetable...

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does that pull to redline or even past it ? What kind of HP are you getting with that set up?

Zz_005_zZ said:

What does everyone think of my choice?? As I am still factory turbo...With the specs listed on the turbo I would have chosen.. I figured it would be a great turbo, expensive new, but in my opinion, should be about right?? I would of course ask someone with an upgraded system b4 I purchased, but I was just curious.

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it doesn't seem like a bad turbo. I just went with my choice because of ATS's extensive research with mr2's and the ease of getting in contact with them through the boards or their cell phone #'s.

I'm happy with my setup. I would have rather ordered it all at once in their kit with everything, but it didn't work out that way because of my circumstances.

I might be making a trip to the local dyno in a little if all the kinks are worked out and funds approve so. I have bigger concerns like worrying about how much money i'll be spending at the bars in Montreal in March

MR2BAD said:

does that pull to redline or even past it ? What kind of HP are you getting with that set up?

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i made 330rwhp at 17psi...conservative tuning...keep in mind my i'm still on stock cams/intake manifold...

MRQturbo said:

i made 330rwhp at 17psi...conservative tuning...keep in mind my i'm still on stock cams/intake manifold...

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Wow! Do you plan on taking it further?

i dont think so..my goal was the 350 range...if i wanted to break the 400 mark..i would have gotten after market cams....i'm getting too old for this....time to start looking at something newer...but with four doors....lol....i'm happy with how the car was running before i stored it..seems i've gotten all the minor bugs dealt with and she was running perfectly..we'll see how she does this spring/summer as she will be my primary daily driver.....i just wanted something very streetable and reliable...

MRQturbo said:

i made 330rwhp at 17psi...conservative tuning...keep in mind my i'm still on stock cams/intake manifold...

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wow thats very impresive...thats exactly wat im looking for...wat turbo kit did u say u had...and wat else is stock or upgraded in your car...if i would get a set up like that what else would i have to modify?

^^i have a custom stock manifold with ext w/g..full 3'' modified HKS dual dragger exhaust...built motor (pistons/rods/arp studs/cometic HG/titanium retainers/hks valve springs)..greddy IC...custom 780 CC top feed injectors/aeromotive FPR/extreme boost fuel rail...and last but not least....full EMS...hks f-con and innovative LM1 wideband....

oh lol...i thought you were gonna say u got that much hp with that turbo kit and just a couple of mods...i was about to go buy the kit the moment i read that....so then how much power do u estimate i'll be making on a STOCK turbo but with a good full exhaust system, cams and a boost controller? and if i were to upgrade my head gasket would it be safe AND/OR efficiant to run over 15psi. on this setup?

motortech mr2 said:

oh lol...i thought you were gonna say u got that much hp with that turbo kit and just a couple of mods...i was about to go buy the kit the moment i read that....so then how much power do u estimate i'll be making on a STOCK turbo but with a good full exhaust system, cams and a boost controller? and if i were to upgrade my head gasket would it be safe AND/OR efficiant to run over 15psi. on this setup?

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NO! Not safe to run over 15 psi with the stock turbo. The Turbine side hits choke point at around 5500rpm's and cannot evacuate the exhaust fast enough which could lead to detonation.
If you read the MR2 Primer, you can get close to 280hp with the stock turbo, bigger IC, fuel tuning, removing the restrictive B pipe,replace restrictive air box with a freer flowing Air Filter(eg. K&N cone), raising the boost with a boost controller of some type, and illiminating fuel cut. read it... there's some good info there.

MRQturbo said:

i dont think so..my goal was the 350 range...if i wanted to break the 400 mark..i would have gotten after market cams....i'm getting too old for this....time to start looking at something newer...but with four doors....lol....i'm happy with how the car was running before i stored it..seems i've gotten all the minor bugs dealt with and she was running perfectly..we'll see how she does this spring/summer as she will be my primary daily driver.....i just wanted something very streetable and reliable...

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I imagine with everything you've already done/have you could easily increase the HP's. But I understand where you're coming from... it can get expensive and there are so many other important needs to fullfill. And thats plenty of power. Must be a kick to drive. And like you said, very streetable and dependable..Still....very nice...

I agree

thats what I am looking for as well... I have gone past the point of pure speed, and gone for reliable daily driver HP, so what he has done is exactly what I am looking for.But I am in no hurry, might be a couple of years b4 I build anything... I got rid of my 1991 and said if I ever bought another one, I would never sell it, and well....... now I have another one, a 1993, and it isn't going anywhere..... so time is on my side.

'93 !? you lucky SOG... I would never let it go...

MR2BAD said:

I imagine with everything you've already done/have you could easily increase the HP's. But I understand where you're coming from... it can get expensive and there are so many other important needs to fullfill. And thats plenty of power. Must be a kick to drive. And like you said, very streetable and dependable..Still....very nice...

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this spring..will get it back on the rollers with some C16 race fuel and see what kind of numbers it'll hit....first driving impressions i had were incredible...the car pulled so hard...almost scary...but after some time behind the wheel, i'm used to the power now and thought i should have gotten cams to hit 400 mark...lol...i guess it will never be fast enough no matter what i do...but i think i'm done....now just time to maintain it and just enjoy driving the car...it was a long and expensive process....

yeah i wouldn't mind getting mine on a dyno too. I know I'm not near your power really because I'm only on my ecu upgraded and stock exhaust/intake manifolds.