Higher boost without liquid cooling injection?
Melting Slicks
Joined: Jul 2004
Posts: 2,844
Likes: 144
From: Northern Ireland
Yes I do my own tuning.
Obviously it's a centrifugal blower, so doesnt make that 21psi to close to 7000rpm. But it is making about 15psi by 5000rpm.
402, YSi, TFS225 heads, EPP cam, circa 9.5:1 CR etc etc
When used on the road, or for some messing about on a local track where there is no grip. Pump fuel only, no meth.
EGT's do not exceed 1470degF ( 800degC ). I run AFR's in very low 11's, occasionally dipping 10's
Intake temps very rarely exceed 105degF. Largely due to the fact that on the road you could never hold the car flat out for very long for obvious reasons. So intake temps never become a problem. ( although with my previous IC they would quickly rise to almost 140degF on the road on a warm day )
Timing above 5000rpm is circa 14deg. CR 9.5:1
On a track with no grip it runs mid-high 11's at circa 140mph, 3600lbs race weight. It only really grips once into 4th though. 1st and 2nd are totally useless, 3rd is fun, and 4th grips. 255/50x16 rear tyres.
I only use meth when racing at a proper venue or for mile runs. Again, for heat soak reasons, and the fact yes it does offer more power, albeit with more risk. And when racing obviously I want to go as fast as possible.
As a recent example in October when I ran my 202mph mile.
AFR's again low 11. Timing 20deg, 20psi top end ( little bit of belt slip though ), Intake temps 68degF, EGT's did hit 1510degF though. Which is hotter than I'd usually allow. ( I normally start to dump fuel in once it hits 1500degF for safety )
I do not use knock sensors. I use a stethoscope type device when tuning. Knock sensors can be unreliable at detecting knock. Very often they can pick up all sorts of noises it may think is knock.
The human ear is far better at filtering out detonation than virtually any electronic device. And best bit, your ears are free, and the stethoscope can be made for very very little money.
Obviously it's a centrifugal blower, so doesnt make that 21psi to close to 7000rpm. But it is making about 15psi by 5000rpm.
402, YSi, TFS225 heads, EPP cam, circa 9.5:1 CR etc etc
When used on the road, or for some messing about on a local track where there is no grip. Pump fuel only, no meth.
EGT's do not exceed 1470degF ( 800degC ). I run AFR's in very low 11's, occasionally dipping 10's
Intake temps very rarely exceed 105degF. Largely due to the fact that on the road you could never hold the car flat out for very long for obvious reasons. So intake temps never become a problem. ( although with my previous IC they would quickly rise to almost 140degF on the road on a warm day )
Timing above 5000rpm is circa 14deg. CR 9.5:1
On a track with no grip it runs mid-high 11's at circa 140mph, 3600lbs race weight. It only really grips once into 4th though. 1st and 2nd are totally useless, 3rd is fun, and 4th grips. 255/50x16 rear tyres.
I only use meth when racing at a proper venue or for mile runs. Again, for heat soak reasons, and the fact yes it does offer more power, albeit with more risk. And when racing obviously I want to go as fast as possible.
As a recent example in October when I ran my 202mph mile.
AFR's again low 11. Timing 20deg, 20psi top end ( little bit of belt slip though ), Intake temps 68degF, EGT's did hit 1510degF though. Which is hotter than I'd usually allow. ( I normally start to dump fuel in once it hits 1500degF for safety )
I do not use knock sensors. I use a stethoscope type device when tuning. Knock sensors can be unreliable at detecting knock. Very often they can pick up all sorts of noises it may think is knock.
The human ear is far better at filtering out detonation than virtually any electronic device. And best bit, your ears are free, and the stethoscope can be made for very very little money.
