Sprintex 335 Testing & Progress

[BobbyBlue86]

Originally Posted by moto-mike

Has a full exhaust and header right now, but it won't go back on the dyno until spring and we have summers on. Header is a skunk2 unit but we may change that out.

Post up some videos! I wanna hear that thing scream... :P

[Dream20b]

Originally Posted by BobbyBlue86

Post up some videos! I wanna hear that thing scream... :P

[blown]

anyone know if the 72.5 mm pulley is still in the safe range of the blower??

[alexisfire02]

Originally Posted by blown

anyone know if the 72.5 mm pulley is still in the safe range of the blower??

According to the sprintex spec sheets maximum RPM of the blow, and the FRS stock crank pulley, you can go down to a 67mm pulley.

However, I had a ton of heat / IAT issues even using a 75mm pulley.

[Xero-Limit]

Originally Posted by blown

anyone know if the 72.5 mm pulley is still in the safe range of the blower??

Rule of thumb on the BRZ is this: Using a max continuous operation of 15000 RPM as specified from sprintex, multiply the pulley diameter by 100 to get your max RPM. So a 72.5mm pulley will hit the max continuous operation limit at approximately 7250 RPM. Although many have exceeded it intermittently without much issue, that tends to be the point where efficiency starts to fall off at a quicker rate. I would probably run a 75 given how large it is unless you're at a really high elevation.

[sam69]

Hey Mike you off your winter tyres yet ??

[Calum]

Originally Posted by sam69

Hey Mike you off your winter tyres yet ??

http://www.post-gazette.com/news/edu...s/201502240137


It'll be at least late march before the weather is consistently warm enough for summer tires. I normally don't take my car out of storage until early to mid April, the weather here is normally only a couple degrees colder than where Mike is.

[sam69]

Mmmmm looks like global warming is really starting to kick in then .. LoL

[Xero-Limit]

It was 30f in anchorage Alaska yesterday. It was -8f here. WTF, I'm moving.

[AJPG]

Originally Posted by moto-mike

It was 30f in anchorage Alaska yesterday. It was -8f here. WTF, I'm moving.

Yesterday
[ATTACH]103430
Last week
[ATTACH]103431

Sir you are more than welcome in my town PR, but be aware that it is summer all year.


Sent from my iPad using Tapatalk

[alexisfire02]

Originally Posted by moto-mike

Rule of thumb on the BRZ is this: Using a max continuous operation of 15000 RPM as specified from sprintex, multiply the pulley diameter by 100 to get your max RPM. So a 72.5mm pulley will hit the max continuous operation limit at approximately 7250 RPM. Although many have exceeded it intermittently without much issue, that tends to be the point where efficiency starts to fall off at a quicker rate. I would probably run a 75 given how large it is unless you're at a really high elevation.

Seems easier to just take the pulley ratios and multiply by RPM.


Our spec sheet from Sprintex lists 15000 max continuous, and 17000 max instantaneous.


I felt like with my car that is was very safe to say that even under any kind of race/track/strip conditions, that nobody would "continually" hold the revs at over 7000 rpms.

[sam69]

Mike you started to thaw out over there yet ?? if not you could always move to the land of Oz .

Noticed in one of your earlier posts you said the 335 wouldn't be so flash to run on pump gas all the time but if going to 10:1 pistons would that be better or worse as I've only got access to 98 ultimate where I am .

[s2d4]

Originally Posted by sam69

Mike you started to thaw out over there yet ?? if not you could always move to the land of Oz .

Noticed in one of your earlier posts you said the 335 wouldn't be so flash to run on pump gas all the time but if going to 10:1 pistons would that be better or worse as I've only got access to 98 ultimate where I am .

Don't have access to E85?
Do you live in a major city or out in the sticks?

[sam69]

Originally Posted by s2d4

Don't have access to E85?
Do you live in a major city or out in the sticks?

Yeah country so no e85 but might run a water meth kit if needed but would just like to run on pump if possible for convenience .