Cam Duration And Vacuum Lose Rb26

[DannyzGTR]

At the what duration do you lose all ur vacuum on idle for brake booster?

I know 270 have -10 on my eboost, if if go 280 would i have no

Vacuum?

[Ben C34]

You always will have some vacuum, how else would the car run?

How much do you need your brakes to work at idle?

The booster stores vacuum, so even if you somehow had no vacuum at idle your brakes would still work.

[Ben C34]

How much power you chasing to justify more duration?

[DannyzGTR]

Well close to 500rwkw. I have tomei 270 10.25, but not sure if i should go 280 10.8? I wanna do things once and only once... Just worries about vacuum for brakes. Dnt wanna end up wit -3 or -4 for idle. After all its a weekender car...

[GTR_JOEY]

you don't need 280 degree cams to make 500rwkw if your set up is spot on.. what is your set up?

[DannyzGTR]

Hks 2.8, t51r, head wit the works. E85 but only boost to 22psi ish

Edited May 10, 2014 by DannyzGTR

[GTR_JOEY]

if your chasing 500rwkw put some more boost down its throat.. make sure fuel, exhaust and ignition system are up to it and enjoy.. don't need bigger cams

[scotty nm35]

Why 22psi?

Keep it under 1psi, that way it will never even wear out.

[DannyzGTR]

The standard map sensor on the haltech comp is gonna be my limit! Lol otherwise its gonna be box and diff every couple of months!! Besides hks stroker is rated to 588kw so at the wheels would be about 470kw

Edited May 10, 2014 by DannyzGTR

[scotty nm35]

A 5 bar sensor is cheap as chips.

Ditch the T51 and get a decent turbo? But then no spooool sound I guess.

[Ben C34]

Limiting a big dollar build because of the map sensor?

[Piggaz]

Leave the duration alone. You'll go backwards!

NYTSKY made 550 on the same turbo with 256 and 264 on 25 psi ( IIRC )

Turn it up! No point having such a monster turbo and running it on fairy boost.

[KiwiRS4T]

The standard map sensor on the haltech comp is gonna be me limit! Lol otherwise its gonna box and diff every couple of months!! Besides hks stroker is rated to 588kw so at the wheels would be about 470kw

Nice looking car but can't follow your logic. Do you want more power or not? A new map sensor will be cheaper than new cams and get your tuner to wind up the boost until you hit 500kw if that's your target.

[DannyzGTR]

Map sounds cheap but haltech know how to screw ppl, harness to run it

Cost $200 and map sensor $140.

Ps. built cost so far 35k and thats me doing all mechanical work, trade prices on 90% of parts!, and some 2nd parts!

Edited May 10, 2014 by DannyzGTR

[GTR_JOEY]

fkn haltec's

[Piggaz]

fkn haltec's

Lol

[Piggaz]

Either way, the "bigger and better" cams are going to cost you more than $340.

[DannyzGTR]

Yea, map sensor is easy fit, cams arent for future mods... Now that head is in process, its better for changes now...

[Piggaz]

How high do you want to rev this thing to warrant 280's?

[zebra]

So you have a meh stroker kit in it

but want huge cams so you can rev a meh crank to 11ty

but wont buy a map sensor to run a couple more psi

Hmmm what will kill the engine quicker?

27 billion rpm or a bit more boost?