370 what turbo?
Thread Starter
Launching!
iTrader: (2)
Joined: Feb 2009
Posts: 225
Likes: 0
From: Morrison, Colorado
370 what turbo? Hey guys i am going to be building a 370 out of a lq4 and i am trying to figure out what turbo i would like to go with i have searched for awhile now and i am still lost on which one to go with... could anybody give me some suggestions? my goal is around 700rwhp but i would also like room to grow also. I already have a t4 flange laying in my garage that i didnt use for another build but if you all are using t6s i will just pick up one of those.
Thanks for the help, Jason
Thanks for the help, Jason
Thread Starter
Launching!
iTrader: (2)
Joined: Feb 2009
Posts: 225
Likes: 0
From: Morrison, Colorado
I have been looking at those and a couple others, i am doing this on a budget so i dont need the best of the best as of right now... Where is everyone getting there turbod from? i have read alot of bad reviews on buying from forced inductions so i would like to find another place to order from. would a Magnum turbo from Modular turbo meet my goals?
I was super happy with my T4 ST80 with the race cover. I think it was a 1.1ar ex side. Spooled real fast, made 700+ WHP on like 11psi, and ~1000ish at 18psi. No need for a T6 under 1khp IMO.
Trending Topics
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
Awesome K5 Blazer Restomod Comes With C7 Corvette Power
Verdad Gallardo
10 Camaros You Should Never Buy
10 LS Engine Myths That Refuse to Die
Verdad Gallardo
The Garrett GT88's and the GT91's seem to be good turbos for the money. Can also be bought with a t4 flange. Seems they would be great on a budget and there are a few guys using them with great results. Check them out too.
You have a PM.
I sent you some info from my favorite turbo dealer, but since he's a non sponsor I didn't want to post the links up.
Basically I gave you 4 options.
One being a BW SX400SX4 turbo with a 80mm comp and a 87mm turbine with a 1.10 ar
Second being the same platform BW same 80mm comp but with a 96mm turbine and a T6 1.32 flange
Third being 80mm garret unit with a 87mm turbine wheel and 1.10 ar T4 flange
Fourth and final was a BW SX400SX4 but with a billet 82mm comp side and a 87mm turbine and 1.10 T4 flange.
All those turbo's I posted will support 1200-1300hp, the difference between them will be spool time, how high in the rpm range they will still flow at the requested PSI, and how much effective boost the motor actually sees out of them before they run out of steam.
I sent you some info from my favorite turbo dealer, but since he's a non sponsor I didn't want to post the links up.
Basically I gave you 4 options.
One being a BW SX400SX4 turbo with a 80mm comp and a 87mm turbine with a 1.10 ar
Second being the same platform BW same 80mm comp but with a 96mm turbine and a T6 1.32 flange
Third being 80mm garret unit with a 87mm turbine wheel and 1.10 ar T4 flange
Fourth and final was a BW SX400SX4 but with a billet 82mm comp side and a 87mm turbine and 1.10 T4 flange.
All those turbo's I posted will support 1200-1300hp, the difference between them will be spool time, how high in the rpm range they will still flow at the requested PSI, and how much effective boost the motor actually sees out of them before they run out of steam.
S475 is cheap, $550 if you look around. But they're huge.
S480 if you find a god deal. Still huge, but more power.
PT88 is a bit smaller and a little more $$$.
PT7675 will go about 1000k flywheel and is much smaller physically.
S480 if you find a god deal. Still huge, but more power.
PT88 is a bit smaller and a little more $$$.
PT7675 will go about 1000k flywheel and is much smaller physically.
9 Second Truck Club
iTrader: (17)
Joined: Sep 2006
Posts: 3,672
Likes: 9
From: Colorado Springs, Co/ Central, Ca
^^^^ I agree. The best power vs $ is the BW units, and power vs size goes to the PT. You ran 144 with a PT78/75 @4350lbs and I've been 145MPH with a PT88/94@4860lbs. Both are T4 flange, and compact units. My pick for a best all around turbo right now for 700-800HP range would be a PT billet 76/75 or 78/75. Unless you're going to be pushing it the PT88 isn't worth the extra lag IMO.
I honestly haven't seen enough power increase to justify the lag of a PT88 over a 7675. PT88 has some old school inefficient wheels, now if you ran a PT8847 that would be worth it, same package as the PT88 but with the GT47 wheels. The GT47 turbine wheel is smaller (quicker spool) and much more efficient than the standard PT88 wheel. For best response / power curve it's important to not oversize your turbo for you goals.
That's why I highly suggested the SX400SX4 billet 82mm compressor wheel 80/87 mm turbine wheel T4 1.10 a/r turbo. He could also get that in 1.20 and 1.30 a/r's in t4 and t6 flanges, and they are on sale at the site I pm'd him about.
Edit: You can only get .90, 1.00, 1.10, and 1.25 t4's on that 80/87 turbine 82mm billet wheel turbo. If you step up to the 88/96mm turbine wheel with the same billet 82 compressor you only can get a T6 1.32 a/r which while great for drag racing might be a little too much for you unless you don't mind making room for a 5-4" downpipe in your engine bay.
Edit: You can only get .90, 1.00, 1.10, and 1.25 t4's on that 80/87 turbine 82mm billet wheel turbo. If you step up to the 88/96mm turbine wheel with the same billet 82 compressor you only can get a T6 1.32 a/r which while great for drag racing might be a little too much for you unless you don't mind making room for a 5-4" downpipe in your engine bay.
9 Second Truck Club
iTrader: (17)
Joined: Sep 2006
Posts: 3,672
Likes: 9
From: Colorado Springs, Co/ Central, Ca
I think my PT88 has the newer exh wheel but I'm not 100% it's the same as the GT4788. How that PT88 ran what it ran in my power robbing 4x4 truck I still don't know lol. It picked up 20mph over the Tnetics Tc76 and T78 in the same conditions. Those PT turbo's rock for what they are...
9 Second Truck Club
iTrader: (17)
Joined: Sep 2006
Posts: 3,672
Likes: 9
From: Colorado Springs, Co/ Central, Ca
Only problem with those is they're divided housings, and really choked down inside, and cost a good amount. I've only seen the 1.0, and 1.1; maybe the 1.3 is better?
Yea the power of the 75mm turbine of the PT is nuts over the TC series. I've gained a solid 9mph now. And spool difference is negligible now that I'm on E85.
We have two identical PT7875s, one is in my car and one is in my buddy's car. I'm really itching to build a motor for both of them and put them in a Fox Mustang. I'm going to start looking into that.
We have two identical PT7875s, one is in my car and one is in my buddy's car. I'm really itching to build a motor for both of them and put them in a Fox Mustang. I'm going to start looking into that.
I think my PT88 has the newer exh wheel but I'm not 100% it's the same as the GT4788. How that PT88 ran what it ran in my power robbing 4x4 truck I still don't know lol. It picked up 20mph over the Tnetics Tc76 and T78 in the same conditions. Those PT turbo's rock for what they are...