has any one used a 3071R twin scroll 64 trim turbo on a stock block ls motor.
thinking of using this on my set up but im not sure if its to big or how it will spool.
if someone has used this please let me know how it worked out for ya

 

Post in forced induction section for better replies.
-Rik

 

what are your power goals??? Chances are you wont use this turbo to its potential and could therefore spend less for a different turbo with the same if not better results. One turbo that i would suggest to you since you're still running the stock bottom end is the GT3251e. It is a relatively inexpensive turbo that will spool fast (before 4k rpm full boost) and still make good power.

Im using a similar turbo (gt3255b) on my GSR. I get full boost before 3900rpm and it pulls hard through redline. It also has good top end...i made 315/216 on a bone stock GSR w/ a conservative tune.

PM me if you want details

 

someone in my area with the 71r is making 326whp at 9psi. but its kseries.

when you guys say it hits full boost before 4k what gear are we talking about?

 

i can only think u can email off these forums? i could be wrong.

 

using any of the GT-R style turbost under 1bar is completely useless...you may as well save your money and buy a journal bearing turbo. It might be "cool" to have a ball bearing turbo, but you're not really using it to its potential. I dont see how people always miss that point

 

care to explain why?

 

well the main reason im thinking about the 71r is cause its twin scroll and ball bearing which means it will spool up faster. its also rated up to 450hp and im working on building a ls block over the winter and im wanting to make about 400whp at about 20psi. but i just want to run it on the stock block till i finish the engine im building cause i dont like the t3/t4 i have now it takes to long to build boost and has a small amount of lag in third gear. im planning on running water injection with about 12-15 psi and the 71r on the stock block till my engine is complete. so what do you guys think or

 

i run a GT3040R on mine and i'm happy with it. spools before 4K and pulls hard. no water injection is needed with only 15. i'm on 15psi on my bone stock LS. no dyno #'s just street tuned by me

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Schister66 &raquo;</TD></TR><TR><TD CLASS="quote">using any of the GT-R style turbost under 1bar is completely useless...you may as well save your money and buy a journal bearing turbo. It might be "cool" to have a ball bearing turbo, but you're not really using it to its potential. I dont see how people always miss that point </TD></TR></TABLE>

you sure do have a vendetta against ball bearings dont you schister66 lol.

The GT series ball bearing turbos outperform their equivelant non ball bearing turbo at any boost level. they arent out there to be "cool". the ball bearing turbos were built for functionality.

to the OP go for it, it should work good for the current setup and could reach your 400whp goal later on. keep in mind without a proper divided manifold the twin scroll housing wont due anything.

 

yea i was wondering about split flange. cause the manifold i have now has t3 flange but i was going to cut it off and weld t25 flange on there. do you know who sells the flange i will need for twin scroll. i know water injection is not needed but it helps.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by mike@synapse motorsport &raquo;</TD></TR><TR><TD CLASS="quote">
you sure do have a vendetta against ball bearings dont you schister66 lol.
</TD></TR></TABLE>

Oh, i have nothing against them at all, but they do have their place. On the other hand, i DO have a problem with ignorant bandwagons on this site. People immediately decide that once they want more than 300whp, they NEED a GTR series turbo when in fact, there are plenty of other turbos out there that will yeild the same results for a fraction of the price.

The GT-R series turbos were a wonderful invention, but people need to understand when they are necessary and when buying one is a waste of money. If you're looking for 400whp, then a GT3071R WILL work for you, but maybe isn't your best bet. For the price there are many journal bearing turbos that will make the same power at the same PSI for half the cost (and can still be rebuilt).

Personally, i would love to have a GT28RS or GT3076R, but it isn't something i'm going to go out of my way to purchase because dollar for dollar, i'm better off w/ my GT3255. Once i'm built and sleeved, i do plan to grab a GT28rs and follow Leng's setup...he IS using it correctly

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Schister66 &raquo;</TD></TR><TR><TD CLASS="quote">

Oh, i have nothing against them at all, but they do have their place. On the other hand, i DO have a problem with ignorant bandwagons on this site. People immediately decide that once they want more than 300whp, they NEED a GTR series turbo when in fact, there are plenty of other turbos out there that will yeild the same results for a fraction of the price.

The GT-R series turbos were a wonderful invention, but people need to understand when they are necessary and when buying one is a waste of money. If you're looking for 400whp, then a GT3071R WILL work for you, but maybe isn't your best bet. For the price there are many journal bearing turbos that will make the same power at the same PSI for half the cost (and can still be rebuilt).

Personally, i would love to have a GT28RS or GT3076R, but it isn't something i'm going to go out of my way to purchase because dollar for dollar, i'm better off w/ my GT3255. Once i'm built and sleeved, i do plan to grab a GT28rs and follow Leng's setup...he IS using it correctly </TD></TR></TABLE>

you think the GT series turbos are an ignorant bandwagon? bandwagon maybe, but ignorant i think not. bandwagons usually exist for a reason, it works. the gt series turbo is a proven performer and reliable turbo. on the track, on the street, on the dyno.

dollar for dollar the gt series turbos are an excellent upgrade. 400-500 dollars more cannot be spent on other parts to pick up the powerband and response these turbos push. you cant make that up spending money elsewhere.

 

well maybe if you pickup a holset...

 

I HIGHLY disagree that a GT3071R won't meet a 400whp goal. I have known of 5 or more guys in the mid-high 400's with that same turbo. The guy I purchased mine from put down 579whp with the 1.08 hot side on an 84mm GSR with a good amount of headwork and supporting mods. Power was put down on his in house dyno, as he is a shop owner.

I think the GT30 is highly underrated on H-T, because everyone wants to jump to a 35R. Not saying that if you have mid 500whp goals you should go with a GT30R, I'm just saying it can be done. Hell there is a DSM with a 14b running 10.20's out there. The turbo is only a piece of the overall build.

In my opinion, with the right approach, and the right combination of supporting mods the GT30 will get you pretty substantial hp numbers, yet spool quick enough to be a really streetable turbo. Just my opinon.

 

why buy a bb turbo when you can break boost for free!!

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by jdm_dc_fan &raquo;</TD></TR><TR><TD CLASS="quote">why buy a bb turbo when you can break boost for free!! </TD></TR></TABLE> what do you mean

 

well what do you guys think about the gt28rs rather than gt3071r for stock ls