Turbo upgrade for 3400

[son_of_a_jimmy]

hey , you guys sound like you know what your talking about. i was wondering if you guys had any suggestions for a turbo on a 3.4L with iron heads that would spool up completely around 3000rpm. im only looking for between 5-15 lbs boost and it is gouing to be used in a remote mount application on my 85 4x4 jimmy. I have a junkyard that says $150 for any turbo they got so i would like to use one from another vehical.. any ideas? i have researched around for about a week or so now on here and other forums and no one i have found has used a remote mounted turbo for a 4x4 that is an everyday driver... so any suggestions would be awsome!!! thanks

[Joseph Upson]

hey , you guys sound like you know what your talking about. i was wondering if you guys had any suggestions for a turbo on a 3.4L with iron heads that would spool up completely around 3000rpm. im only looking for between 5-15 lbs boost and it is gouing to be used in a remote mount application on my 85 4x4 jimmy. I have a junkyard that says $150 for any turbo they got so i would like to use one from another vehical.. any ideas? i have researched around for about a week or so now on here and other forums and no one i have found has used a remote mounted turbo for a 4x4 that is an everyday driver... so any suggestions would be awsome!!! thanks

I would give Ebay a try at that price first. You may end up with a generic but it's a tough call, a used very likely in need of rebuilding salvaged turbo, or a new knock off, sometimes you can find a really good working turbo on Ebay to suit your needs. I would highly recommend against a remote mount turbo on the basis you have more than enough room in that vehicle for a front mount turbo which will be most effective and efficient.

[Guest]

Precision SC6152E turbo with a .63 exh housing. Will spool quick.

I haev it and get 7 psi by 2700 rpm on a 3.4 but is also good enough for 600 hp.

[son_of_a_jimmy]

thanks for the reply. i have been looking on ebay but like from the research i have done i haven;t found someone that used a turbo on a 4x4 for a lower rpm, everyone wants crazy power for high rpms.. i know turbos are ment for high rpms but this is an everyday driver and im onlyplaning on running 5-20lbs boost so it doesn;t need to be efficient as possible.. any air movement is better then stock. the reason for remote mounting is because i have long tube headers already, and those help with my low end torque.. and i don;t wanna spend the money for all knew turbo headers or manifolds. so if you have anyideas on make/model and size of turbos that work pretty well for this motor as an everyday driveer it would be appreciated.

thanks

[nocutt]

You have to becareful with those java applets calculators...a 3400 even with a higher VE than stock will find it had pressed to spool a turbine housed in a 1.0X A/R period...don't forget we are only talking just a little over 200ci in displacement. As a matter of fact .82 will probably be the last exhaust housing one will need with the aforementioned displacement

T25's are tiny. They're also known as the T too small by the DSM guys. They're great for stock small displacement motors though. The GT30 series is equivalent in size or a bit larger than most T3/T4's. A T3/T4 uses a T3 turbine with a T4 compressor. A T04E uses a T04E compressor and a T4 turbine. As far as size and power, T6>T4>T3>T2X. The 60 trim T3/T4 hybrid is like a GT30R. The GT35R is more like a 60-1 T4. Either would work well.

Tim I just wanted to make one correction, the 35R really has no semblance to the 60 dash, in any shape or form; perhaps you were suggesting max hp in which case it has to be specified in other for the 60 dash to make that much power it usually will have to be out of its usual hi-fi outfit and into a S-housing.

I think for quick spool up and broad powerband the t04e 60 with a staged wheel housed in a .63 A/R is plenty for a lot of ppl (meaning most who are stock and will never go beyond 2bars)...
For those who have supporting mods a 61mm turbo will definitely be the answer either PT61 or a bonified 35R...hths

[MidnightriderZ24]

i used to run a 57 trim. .63ex .50 in. it spooled fast and kept up on the top end but its still a little small for a 3400... the turbo i plan on using with my built motor is a gt35r. its going to have a .82 ex .70 compressor. .82 BB i plan on spooling at 3500ish and run about 20psi.. but theres still some more options yet im still undecided...

[3XTurboAgain]

Midnight, is that the turbo your using in those videos w/ 350 hp? I just want something bigger than the T25 , but if i were to really spend money, get the .82...

[nocutt]

Midnight, is that the turbo your using in those videos w/ 350 hp? I just want something bigger than the T25 , but if i were to really spend money, get the .82...

you really don't need an .82 on a stock motor...

[3XTurboAgain]

Forged pistons- LG5 block w/ 3400 topend w/30 lb injectors is a stock motor? I think that motor is pretty badd azz

[nocutt]

Forged pistons- LG5 block w/ 3400 topend w/30 lb injectors is a stock motor? I think that motor is pretty badd azz

lol...relatively stock!! heads and cam are the crux!!

[3XTurboAgain]

Ok so cam , valves and springs....that can be done