Turbo Log Qustion
Turbo Log Qustion now i know lots of you have your own opinon about Logs and why they suck, But that isn't what i am about to ask.
I Know very little about Turbo's but i have decide to venture out into the Turbo world and build my First Turbo car.
After Completely Fragging a 422 on the dyno , i have now started building an Aluminum 427.
With that said what size log? the plan is running a pt88 but again what size log?
3in log with 2in prime? 3in 1 7/8in? 3in 1 3/4in? 2.5in 2in? 2.5in 1 7.8in? 2.5in 1 3/4in?
i have done "some" reading on the matter and i have also contact some vendors but knowone has any real info. i know Real info will be hard to come by but any ideas will be taken into consideration
Thank You
I Know very little about Turbo's but i have decide to venture out into the Turbo world and build my First Turbo car.
After Completely Fragging a 422 on the dyno , i have now started building an Aluminum 427.
With that said what size log? the plan is running a pt88 but again what size log?
3in log with 2in prime? 3in 1 7/8in? 3in 1 3/4in? 2.5in 2in? 2.5in 1 7.8in? 2.5in 1 3/4in?
i have done "some" reading on the matter and i have also contact some vendors but knowone has any real info. i know Real info will be hard to come by but any ideas will be taken into consideration
Thank You
TECH Resident
Joined: Aug 2003
Posts: 948
Likes: 0
From: orlando, florida
Are you going to run both banks through the log like the TTi and QMP kits or are you gonna Y the X-over in at the turbo? if your gonna run both banks through the log i`d go 3in log with 1 7/8 primarys. If your gonna Y it in at the turbo i`d go 2.5in log with 1 3/4 primarys and 2 1/2in crossover going into the turbo.
1 5/8 or 1 3/4 is generally as big as you want with a turbocharged engine... race or street. Think small before the turbo for velocity and as big as you can fit for the DP
Like the guy above said... are you doing a log on one side with a manifold feeding it or two logs Y'd together?
Like the guy above said... are you doing a log on one side with a manifold feeding it or two logs Y'd together?
I would run a 1 3/4 into a 3 inch log with either a .96 or a 1.30 AR depending on the intended use of the engine
Cal isn't working on my car, but I buy all my parts through him.
Do I know you?
Cal isn't working on my car, but I buy all my parts through him.
Do I know you?
No we have never met. i was talking with Cal Yesterday and her was telling me about a 1st gen that he had put a turbo into and was getting ready for a photo shoot with GMHTP.. Thanks for the input on the log
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TECH Resident
Joined: Aug 2003
Posts: 948
Likes: 0
From: orlando, florida
I`ve been trying to find the time to finish the 3in log for my turbo tech kit well see what happens when i get it done. Spool time might be affected but i`m willing to bet i`ll gain some HP from the lower exhaust backpressure and better flow from all the primarys entering the log at a 35* angle to direct flow instead of a 90* angle like the original log.
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