Turbo selection
Turbo selection On a SBE 5.3 with 228/588 cam, 799 heads, through a tremec magnum a g body cutlass I have two turbo options. 7275 .96, journal bearing, cast wheel precision turbo or 7875 1.15 ceramic ball bearing, billet wheel comp turbo. I am not looking to make all of the horse power, looking for the 550 to 600 whp range with decent street manners. Car will be daily driven in nice weather. My main concern is the 1.15 a/r will be too big/laggy. Which turbo would you guys run?
On a SBE 5.3 with 228/588 cam, 799 heads, through a tremec magnum a g body cutlass I have two turbo options. 7275 .96, journal bearing, cast wheel precision turbo or 7875 1.15 ceramic ball bearing, billet wheel comp turbo. I am not looking to make all of the horse power, looking for the 550 to 600 whp range with decent street manners. Car will be daily driven in nice weather. My main concern is the 1.15 a/r will be too big/laggy. Which turbo would you guys run?
Find one with a compressor map that ends around 75-80lbs/min
for about 500w on 5.3L I chose S364 which flows around 72lb/min iirc, but the engine is too large to touch 70. It will do 60~ though.
for about 500w on 5.3L I chose S364 which flows around 72lb/min iirc, but the engine is too large to touch 70. It will do 60~ though.
Ur cam is too big
Here is my old combo. Cast 72/83 Borg Warner with a 215/215 112* camshaft all in a she 5.4 with stock 853’s. Went 9’s easy and spinning from the launch. I know for a fact it would of went 9.50’s or faster had I got the car to leave right and add some more boost.
Here is my old combo. Cast 72/83 Borg Warner with a 215/215 112* camshaft all in a she 5.4 with stock 853’s. Went 9’s easy and spinning from the launch. I know for a fact it would of went 9.50’s or faster had I got the car to leave right and add some more boost.
Ur cam is too big
Here is my old combo. Cast 72/83 Borg Warner with a 215/215 112* camshaft all in a she 5.4 with stock 853’s. Went 9’s easy and spinning from the launch. I know for a fact it would of went 9.50’s or faster had I got the car to leave right and add some more boost.
https://youtu.be/1MeLItCzsSc
Here is my old combo. Cast 72/83 Borg Warner with a 215/215 112* camshaft all in a she 5.4 with stock 853’s. Went 9’s easy and spinning from the launch. I know for a fact it would of went 9.50’s or faster had I got the car to leave right and add some more boost.
https://youtu.be/1MeLItCzsSc
sharp car, definitely dig the color. I know the cam isn't optimal, but it's in the engine and I'll run it until i can swap it out. Isn't 112 a little tight for a turbo cam? Thank you
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Joined: Mar 2014
Posts: 7,192
Likes: 109
From: Ohio
Even with a 112 LSA, that cam has -9 degrees of overlap. LSA is only a piece of the puzzle.
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Verdad Gallardo For anyone else looking at turbo sizes, I called comp turbos (great customer service) and they said between 1.0 and 1.15 is the sweet spot for a 5.3 with a divided housing and .96 on an undivided housing