is gt35r to big
Honestly, Its too big for a stock setup IMO. You would be better off with a GT30R. Having seen both turbos at work, the powerband from the 30 is much better feeling for less than 12psi. Coincedently, I doubt your going to be running more than 12psi on a stock setup.
Too many people on this site choose turbo's that are just way too big for a street car. Do some research, choose the right size, and the result will be a setup that has both good response and makes good power.
Read through all the article on this site. For reference, the volumetric efficiency of the H22 is 102%.
http://www.turbobygarrett.com/turbob...ch_center.html
Read through all the article on this site. For reference, the volumetric efficiency of the H22 is 102%.
http://www.turbobygarrett.com/turbob...ch_center.html
Psi is an arbitrary figure that doesn't mean anything out of the context of turbo size. On a stock motor, hp and tuning are the important factors.
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what he is telling u is psi has no relation to how much power ur going to make. 6-7psi on a gt 30 compared to a gt 35 is going to net u 2 different horsepower ranges. You need to deside on how much power u would like to achieve then go for the turbo thats going to get you there for least amount of exspense. 35r is way to much for a stock application unless your planning on going full blown build later. 30r would work fine for now and later even if your looking foor a 400whp setup. Or go the little bit cheaper route and run a 60-1 for 700.00 and its good for up to 550whp on a built set up. tuneing is the key to keeping your engine together.
what he is telling u is psi has no relation to how much power ur going to make. 6-7psi on a gt 30 compared to a gt 35 is going to net u 2 different horsepower ranges. You need to deside on how much power u would like to achieve then go for the turbo thats going to get you there for least amount of exspense. 35r is way to much for a stock application unless your planning on going full blown build later. 30r would work fine for now and later even if your looking foor a 400whp setup. Or go the little bit cheaper route and run a 60-1 for 700.00 and its good for up to 550whp on a built set up. tuneing is the key to keeping your engine together.
jesus, I like his math. 7 psi = 400whp. so why did my 6 psi (5.5 at the IM) only come out to 242 whp ??? lol. Must be in my ghetto tune. I'll take that on my stock h23 with my crome tune anyday though hahahah.
ok i didnt understand him but no need for the smartness plus i herd crome sucks and u have a h23 less hp
gt35r is not efficient on stock motor for daily.... do a little more research into exactly what youre trying to accomplish power wise and get a turbo thats sized right for your goals/driving style/budget
i want to eventually rebuild so i wouldnt mind going with the 30r either so eveyone sayin go with the 30r ? or what
go with a 30r i have it on my 99sh been at 10lbs all summer runs perfect that 35r would lag more then you would want. What size injectors? FMIC? wastegate? exhaust? have you figured any of that out yett or jsut think a turbo sounds cool rite about now?
^^ exactly what i meant when saying decide on a plan then pick the turbo. theres so many other things to factor in before you settle on the turbo itself.
gt3071 or the gt30/40
the 3071 will allow for a little more low end boost. we use that one on our roadrace and daily 300-500whp cars.
when do you want boost to kick in? how long do you want it to last? if you want a nice low end daily car then i suggest something simple like a disco potato room to grow would be the 3071.
i have a gt35r for my engine that im shooting for all top end 600+whp....it wont spool until 5k idealy but will climb thru to redline.
when you rebuild for more boost its about doing all the calculations again....but the 3071 will give you room to grow....you can also upgrade the cartridges later on if you have a big enuff housing. AR plays its part in spool and power also...so yeah...like i said..theres a lot of things to keep in mind when picking your turbo.
gt3071 or the gt30/40
the 3071 will allow for a little more low end boost. we use that one on our roadrace and daily 300-500whp cars.
when do you want boost to kick in? how long do you want it to last? if you want a nice low end daily car then i suggest something simple like a disco potato room to grow would be the 3071.
i have a gt35r for my engine that im shooting for all top end 600+whp....it wont spool until 5k idealy but will climb thru to redline.
when you rebuild for more boost its about doing all the calculations again....but the 3071 will give you room to grow....you can also upgrade the cartridges later on if you have a big enuff housing. AR plays its part in spool and power also...so yeah...like i said..theres a lot of things to keep in mind when picking your turbo.
my opinion:
start small and then work your way up to the big boys and acquire knowledge along the way. Its pretty obvious that you just want a fast car and you have no clue what you are doing (no offense), but do you have the ability and knowledge to keep such a motor maintained and running properly? Then think about how unstreetable a high horsepower car is in reality driving it day to day. Daily driving, you are not going to want to sacrifice throttle response in the event you have to pull into traffic. Another very good idea is to install PWM boost control and have a good engine management which can control boost by gear so you dont have to run full boost in all the gears and sacrifice traction.
start small and then work your way up to the big boys and acquire knowledge along the way. Its pretty obvious that you just want a fast car and you have no clue what you are doing (no offense), but do you have the ability and knowledge to keep such a motor maintained and running properly? Then think about how unstreetable a high horsepower car is in reality driving it day to day. Daily driving, you are not going to want to sacrifice throttle response in the event you have to pull into traffic. Another very good idea is to install PWM boost control and have a good engine management which can control boost by gear so you dont have to run full boost in all the gears and sacrifice traction.
do u have stock internals i want the sp ram horn manifold with 3" exhaust, i was going to get a 39mm tial wastegate and a 27x7.5x3 percision intercooler and mabe 550cc delp injectors
Last edited by jdmlude87; Nov 24, 2008 at 07:52 PM. Reason: wanted to add more
my opinion:
start small and then work your way up to the big boys and acquire knowledge along the way. Its pretty obvious that you just want a fast car and you have no clue what you are doing (no offense), but do you have the ability and knowledge to keep such a motor maintained and running properly? Then think about how unstreetable a high horsepower car is in reality driving it day to day. Daily driving, you are not going to want to sacrifice throttle response in the event you have to pull into traffic. Another very good idea is to install PWM boost control and have a good engine management which can control boost by gear so you dont have to run full boost in all the gears and sacrifice traction.
start small and then work your way up to the big boys and acquire knowledge along the way. Its pretty obvious that you just want a fast car and you have no clue what you are doing (no offense), but do you have the ability and knowledge to keep such a motor maintained and running properly? Then think about how unstreetable a high horsepower car is in reality driving it day to day. Daily driving, you are not going to want to sacrifice throttle response in the event you have to pull into traffic. Another very good idea is to install PWM boost control and have a good engine management which can control boost by gear so you dont have to run full boost in all the gears and sacrifice traction.
i ran a gt30r on my stock h22 and made 427 @ 14lbs, i also have a gt30r and 38mm tial wastegate for sale if your interested. pm me if your interested and good luck on the build


