Best rear end for higher HP cars?
Thread Starter
FDrx7.com
Joined: Oct 2004
Posts: 160
Likes: 0
From: Sydney Australia
Best rear end for higher HP cars?
Guys,
Need some advice from the knowledgeable people on here
I am building a reasonably powerful FD, and I have a feeling the diff will not last long. As such I am after advice on the best option available.
So far I have found a multitude of diff braces, some looking better than others.
Diff Girdles, from 2 people only (PFS, and a privateer)
and obviously lots of diff centres..
Cobra Diff conversions also exist..but are beyond my skills to recreate, and freight would be bothersome to Australia..(Where I am located)
My car will mainly be street driven, with a bit of circuit racing, and very little 1/4 mile attention. I am after the car still being liveable..so the least clunking, quietest, and easiest option to install is preferred....
To give an indication of expected power outputs please read the list below and form your own judgement on what I may need...
Brand new Mazda Crate Engine, Mammoth Street Port, clearancing, lightening, balancing etc by Rice Racing, NRS 2mm 1 piece ceramic seals, Ceramic Coating of the entire engine, manifolds etc, Xcessive Lower Intake Manifold, Xcessive 4 Injector Fuel Rail, Xsessive Sump, HKS T51R SPL Ball Bearing turbo kit, 4x1700cc Bosch Injectors, 1300 Degree EGT probe and guage, HKS Twin Power DLI ,Greddy Racing plugs, FJO Fuel Injector Driver, Twin Sard 280lph intank fuel pumps,Sard Racing Fuel Reg, 3.5 Bar MAP sensor, SARD Radiator hoses etc, Apexi PFC and handset, 3.5" SMB Exhaust, Koyo Nflo Alloy Radiator, Noltec Engine Mounts, Water to Air Intercooler, Rice Racing Water Injection, Exedy Triple Plate Carbon D Core Clutch, Plus a few other tricks...
Car will be running over 30psi on pump fuel
Need some advice from the knowledgeable people on here
I am building a reasonably powerful FD, and I have a feeling the diff will not last long. As such I am after advice on the best option available.
So far I have found a multitude of diff braces, some looking better than others.
Diff Girdles, from 2 people only (PFS, and a privateer)
and obviously lots of diff centres..
Cobra Diff conversions also exist..but are beyond my skills to recreate, and freight would be bothersome to Australia..(Where I am located)
My car will mainly be street driven, with a bit of circuit racing, and very little 1/4 mile attention. I am after the car still being liveable..so the least clunking, quietest, and easiest option to install is preferred....
To give an indication of expected power outputs please read the list below and form your own judgement on what I may need...
Brand new Mazda Crate Engine, Mammoth Street Port, clearancing, lightening, balancing etc by Rice Racing, NRS 2mm 1 piece ceramic seals, Ceramic Coating of the entire engine, manifolds etc, Xcessive Lower Intake Manifold, Xcessive 4 Injector Fuel Rail, Xsessive Sump, HKS T51R SPL Ball Bearing turbo kit, 4x1700cc Bosch Injectors, 1300 Degree EGT probe and guage, HKS Twin Power DLI ,Greddy Racing plugs, FJO Fuel Injector Driver, Twin Sard 280lph intank fuel pumps,Sard Racing Fuel Reg, 3.5 Bar MAP sensor, SARD Radiator hoses etc, Apexi PFC and handset, 3.5" SMB Exhaust, Koyo Nflo Alloy Radiator, Noltec Engine Mounts, Water to Air Intercooler, Rice Racing Water Injection, Exedy Triple Plate Carbon D Core Clutch, Plus a few other tricks...
Car will be running over 30psi on pump fuel
I would go with the TII diff. Kaaz works but it's a bit noisy.
Most diffs break when you launch and get wheel hop. If you avoid wheel hop you should not be breaking things everywhere. Make sure you've upgraded your diff bushings.
Dave
Most diffs break when you launch and get wheel hop. If you avoid wheel hop you should not be breaking things everywhere. Make sure you've upgraded your diff bushings.
Dave
Thread Starter
FDrx7.com
Joined: Oct 2004
Posts: 160
Likes: 0
From: Sydney Australia
Will the TII handle the much higher HP levels? 700+rwhp?
Diff bushings....yes I had best upgrade those
Has anyone got an opinion on the best girdle / brace combination? I noticed ErnieT had the PFS girdle, but I couldnt see which brace he was using, He is using the Kaaz however.
The idle will be pretty good, I have a magic tuner on the job Surprisingly I am also expecting very decent fuel economy when off boost and yes the car is a street / track weapon....the main reason for the big injectors is the higher hp requirement....the car will be running above 80% duty cycle on full boost..
If the car is not being used with too much drag racing, will the stock axles stay in one piece? How will the gearbox hold up?
Diff bushings....yes I had best upgrade those
Has anyone got an opinion on the best girdle / brace combination? I noticed ErnieT had the PFS girdle, but I couldnt see which brace he was using, He is using the Kaaz however.
The idle will be pretty good, I have a magic tuner on the job
Surprisingly I am also expecting very decent fuel economy when off boost and yes the car is a street / track weapon....the main reason for the big injectors is the higher hp requirement....the car will be running above 80% duty cycle on full boost..If the car is not being used with too much drag racing, will the stock axles stay in one piece? How will the gearbox hold up?
